From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libjava/classpath/java/text/DecimalFormat.java | 2278 ++++++++++++++++++++++++ 1 file changed, 2278 insertions(+) create mode 100644 libjava/classpath/java/text/DecimalFormat.java (limited to 'libjava/classpath/java/text/DecimalFormat.java') diff --git a/libjava/classpath/java/text/DecimalFormat.java b/libjava/classpath/java/text/DecimalFormat.java new file mode 100644 index 000000000..9f02bb8d4 --- /dev/null +++ b/libjava/classpath/java/text/DecimalFormat.java @@ -0,0 +1,2278 @@ +/* DecimalFormat.java -- Formats and parses numbers + Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +/* + * This class contains few bits from ICU4J (http://icu.sourceforge.net/), + * Copyright by IBM and others and distributed under the + * distributed under MIT/X. + */ + +package java.text; + +import gnu.java.lang.CPStringBuilder; + +import java.math.BigDecimal; +import java.math.BigInteger; + +import java.util.ArrayList; +import java.util.Currency; +import java.util.Locale; + +/* + * This note is here for historical reasons and because I had not the courage + * to remove it :) + * + * @author Tom Tromey (tromey@cygnus.com) + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + * @date March 4, 1999 + * + * Written using "Java Class Libraries", 2nd edition, plus online + * API docs for JDK 1.2 from http://www.javasoft.com. + * Status: Believed complete and correct to 1.2. + * Note however that the docs are very unclear about how format parsing + * should work. No doubt there are problems here. + */ + +/** + * This class is a concrete implementation of NumberFormat used to format + * decimal numbers. The class can format numbers given a specific locale. + * Generally, to get an instance of DecimalFormat you should call the factory + * methods in the NumberFormat base class. + * + * @author Mario Torre (neugens@limasoftware.net) + * @author Tom Tromey (tromey@cygnus.com) + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + */ +public class DecimalFormat extends NumberFormat +{ + /** serialVersionUID for serializartion. */ + private static final long serialVersionUID = 864413376551465018L; + + /** Defines the default number of digits allowed while formatting integers. */ + private static final int DEFAULT_INTEGER_DIGITS = 309; + + /** + * Defines the default number of digits allowed while formatting + * fractions. + */ + private static final int DEFAULT_FRACTION_DIGITS = 340; + + /** + * Locale-independent pattern symbols. + */ + // Happen to be the same as the US symbols. + private static final DecimalFormatSymbols nonLocalizedSymbols + = new DecimalFormatSymbols (Locale.US); + + /** + * Defines if parse should return a BigDecimal or not. + */ + private boolean parseBigDecimal; + + /** + * Defines if we have to use the monetary decimal separator or + * the decimal separator while formatting numbers. + */ + private boolean useCurrencySeparator; + + /** Defines if the decimal separator is always shown or not. */ + private boolean decimalSeparatorAlwaysShown; + + /** + * Defines if the decimal separator has to be shown. + * + * This is different then decimalSeparatorAlwaysShown, + * as it defines if the format string contains a decimal separator or no. + */ + private boolean showDecimalSeparator; + + /** + * This field is used to determine if the grouping + * separator is included in the format string or not. + * This is only needed to match the behaviour of the RI. + */ + private boolean groupingSeparatorInPattern; + + /** Defines the size of grouping groups when grouping is used. */ + private byte groupingSize; + + /** + * This is an internal parameter used to keep track of the number + * of digits the form the exponent, when exponential notation is used. + * It is used with exponentRound + */ + private byte minExponentDigits; + + /** This field is used to set the exponent in the engineering notation. */ + private int exponentRound; + + /** Multiplier used in percent style formats. */ + private int multiplier; + + /** Multiplier used in percent style formats. */ + private int negativePatternMultiplier; + + /** The negative prefix. */ + private String negativePrefix; + + /** The negative suffix. */ + private String negativeSuffix; + + /** The positive prefix. */ + private String positivePrefix; + + /** The positive suffix. */ + private String positiveSuffix; + + /** Decimal Format Symbols for the given locale. */ + private DecimalFormatSymbols symbols; + + /** Determine if we have to use exponential notation or not. */ + private boolean useExponentialNotation; + + /** + * Defines the maximum number of integer digits to show when we use + * the exponential notation. + */ + private int maxIntegerDigitsExponent; + + /** Defines if the format string has a negative prefix or not. */ + private boolean hasNegativePrefix; + + /** Defines if the format string has a fractional pattern or not. */ + private boolean hasFractionalPattern; + + /** Stores a list of attributes for use by formatToCharacterIterator. */ + private ArrayList attributes = new ArrayList(); + + /** + * Constructs a DecimalFormat which uses the default + * pattern and symbols. + */ + public DecimalFormat() + { + this ("#,##0.###"); + } + + /** + * Constructs a DecimalFormat which uses the given + * pattern and the default symbols for formatting and parsing. + * + * @param pattern the non-localized pattern to use. + * @throws NullPointerException if any argument is null. + * @throws IllegalArgumentException if the pattern is invalid. + */ + public DecimalFormat(String pattern) + { + this (pattern, new DecimalFormatSymbols()); + } + + /** + * Constructs a DecimalFormat using the given pattern + * and formatting symbols. This construction method is used to give + * complete control over the formatting process. + * + * @param pattern the non-localized pattern to use. + * @param symbols the set of symbols used for parsing and formatting. + * @throws NullPointerException if any argument is null. + * @throws IllegalArgumentException if the pattern is invalid. + */ + public DecimalFormat(String pattern, DecimalFormatSymbols symbols) + { + this.symbols = (DecimalFormatSymbols) symbols.clone(); + applyPatternWithSymbols(pattern, nonLocalizedSymbols); + } + + /** + * Apply the given localized patern to the current DecimalFormat object. + * + * @param pattern The localized pattern to apply. + * @throws IllegalArgumentException if the given pattern is invalid. + * @throws NullPointerException if the input pattern is null. + */ + public void applyLocalizedPattern (String pattern) + { + applyPatternWithSymbols(pattern, this.symbols); + } + + /** + * Apply the given localized pattern to the current DecimalFormat object. + * + * @param pattern The localized pattern to apply. + * @throws IllegalArgumentException if the given pattern is invalid. + * @throws NullPointerException if the input pattern is null. + */ + public void applyPattern(String pattern) + { + applyPatternWithSymbols(pattern, nonLocalizedSymbols); + } + + public Object clone() + { + DecimalFormat c = (DecimalFormat) super.clone(); + c.symbols = (DecimalFormatSymbols) symbols.clone(); + return c; + } + + /** + * Tests this instance for equality with an arbitrary object. This method + * returns true if: + * + * + * @param obj the object (null permitted). + * + * @return A boolean. + */ + public boolean equals(Object obj) + { + if (! (obj instanceof DecimalFormat)) + return false; + DecimalFormat dup = (DecimalFormat) obj; + return (decimalSeparatorAlwaysShown == dup.decimalSeparatorAlwaysShown + && groupingUsed == dup.groupingUsed + && groupingSeparatorInPattern == dup.groupingSeparatorInPattern + && groupingSize == dup.groupingSize + && multiplier == dup.multiplier + && useExponentialNotation == dup.useExponentialNotation + && minExponentDigits == dup.minExponentDigits + && minimumIntegerDigits == dup.minimumIntegerDigits + && maximumIntegerDigits == dup.maximumIntegerDigits + && minimumFractionDigits == dup.minimumFractionDigits + && maximumFractionDigits == dup.maximumFractionDigits + && parseBigDecimal == dup.parseBigDecimal + && useCurrencySeparator == dup.useCurrencySeparator + && showDecimalSeparator == dup.showDecimalSeparator + && exponentRound == dup.exponentRound + && negativePatternMultiplier == dup.negativePatternMultiplier + && maxIntegerDigitsExponent == dup.maxIntegerDigitsExponent + // XXX: causes equivalent patterns to fail + // && hasNegativePrefix == dup.hasNegativePrefix + && equals(negativePrefix, dup.negativePrefix) + && equals(negativeSuffix, dup.negativeSuffix) + && equals(positivePrefix, dup.positivePrefix) + && equals(positiveSuffix, dup.positiveSuffix) + && symbols.equals(dup.symbols)); + } + + /** + * Returns a hash code for this object. + * + * @return A hash code. + */ + public int hashCode() + { + return toPattern().hashCode(); + } + + /** + * Produce a formatted {@link String} representation of this object. + * The passed object must be of type number. + * + * @param obj The {@link Number} to format. + * @param sbuf The destination String; text will be appended to this String. + * @param pos If used on input can be used to define an alignment + * field. If used on output defines the offsets of the alignment field. + * @return The String representation of this long. + */ + public final StringBuffer format(Object obj, StringBuffer sbuf, FieldPosition pos) + { + if (obj instanceof BigInteger) + { + BigDecimal decimal = new BigDecimal((BigInteger) obj); + formatInternal(decimal, true, sbuf, pos); + return sbuf; + } + else if (obj instanceof BigDecimal) + { + formatInternal((BigDecimal) obj, true, sbuf, pos); + return sbuf; + } + + return super.format(obj, sbuf, pos); + } + + /** + * Produce a formatted {@link String} representation of this double. + * + * @param number The double to format. + * @param dest The destination String; text will be appended to this String. + * @param fieldPos If used on input can be used to define an alignment + * field. If used on output defines the offsets of the alignment field. + * @return The String representation of this long. + * @throws NullPointerException if dest or fieldPos are null + */ + public StringBuffer format(double number, StringBuffer dest, + FieldPosition fieldPos) + { + // special cases for double: NaN and negative or positive infinity + if (Double.isNaN(number)) + { + // 1. NaN + String nan = symbols.getNaN(); + dest.append(nan); + + // update field position if required + if ((fieldPos.getField() == INTEGER_FIELD || + fieldPos.getFieldAttribute() == NumberFormat.Field.INTEGER)) + { + int index = dest.length(); + fieldPos.setBeginIndex(index - nan.length()); + fieldPos.setEndIndex(index); + } + } + else if (Double.isInfinite(number)) + { + // 2. Infinity + if (number < 0) + dest.append(this.negativePrefix); + else + dest.append(this.positivePrefix); + + dest.append(symbols.getInfinity()); + + if (number < 0) + dest.append(this.negativeSuffix); + else + dest.append(this.positiveSuffix); + + if ((fieldPos.getField() == INTEGER_FIELD || + fieldPos.getFieldAttribute() == NumberFormat.Field.INTEGER)) + { + fieldPos.setBeginIndex(dest.length()); + fieldPos.setEndIndex(0); + } + } + else + { + // get the number as a BigDecimal + BigDecimal bigDecimal = new BigDecimal(String.valueOf(number)); + formatInternal(bigDecimal, false, dest, fieldPos); + } + + return dest; + } + + /** + * Produce a formatted {@link String} representation of this long. + * + * @param number The long to format. + * @param dest The destination String; text will be appended to this String. + * @param fieldPos If used on input can be used to define an alignment + * field. If used on output defines the offsets of the alignment field. + * @return The String representation of this long. + */ + public StringBuffer format(long number, StringBuffer dest, + FieldPosition fieldPos) + { + BigDecimal bigDecimal = new BigDecimal(String.valueOf(number)); + formatInternal(bigDecimal, true, dest, fieldPos); + return dest; + } + + /** + * Return an AttributedCharacterIterator as a result of + * the formatting of the passed {@link Object}. + * + * @return An {@link AttributedCharacterIterator}. + * @throws NullPointerException if value is null. + * @throws IllegalArgumentException if value is not an instance of + * {@link Number}. + */ + public AttributedCharacterIterator formatToCharacterIterator(Object value) + { + /* + * This method implementation derives directly from the + * ICU4J (http://icu.sourceforge.net/) library, distributed under MIT/X. + */ + + if (value == null) + throw new NullPointerException("Passed Object is null"); + + if (!(value instanceof Number)) throw new + IllegalArgumentException("Cannot format given Object as a Number"); + + StringBuffer text = new StringBuffer(); + attributes.clear(); + super.format(value, text, new FieldPosition(0)); + + AttributedString as = new AttributedString(text.toString()); + + // add NumberFormat field attributes to the AttributedString + for (int i = 0; i < attributes.size(); i++) + { + FieldPosition pos = (FieldPosition) attributes.get(i); + Format.Field attribute = pos.getFieldAttribute(); + + as.addAttribute(attribute, attribute, pos.getBeginIndex(), + pos.getEndIndex()); + } + + // return the CharacterIterator from AttributedString + return as.getIterator(); + } + + /** + * Returns the currency corresponding to the currency symbol stored + * in the instance of DecimalFormatSymbols used by this + * DecimalFormat. + * + * @return A new instance of Currency if + * the currency code matches a known one, null otherwise. + */ + public Currency getCurrency() + { + return symbols.getCurrency(); + } + + /** + * Returns a copy of the symbols used by this instance. + * + * @return A copy of the symbols. + */ + public DecimalFormatSymbols getDecimalFormatSymbols() + { + return (DecimalFormatSymbols) symbols.clone(); + } + + /** + * Gets the interval used between a grouping separator and the next. + * For example, a grouping size of 3 means that the number 1234 is + * formatted as 1,234. + * + * The actual character used as grouping separator depends on the + * locale and is defined by {@link DecimalFormatSymbols#getDecimalSeparator()} + * + * @return The interval used between a grouping separator and the next. + */ + public int getGroupingSize() + { + return groupingSize; + } + + /** + * Gets the multiplier used in percent and similar formats. + * + * @return The multiplier used in percent and similar formats. + */ + public int getMultiplier() + { + return multiplier; + } + + /** + * Gets the negative prefix. + * + * @return The negative prefix. + */ + public String getNegativePrefix() + { + return negativePrefix; + } + + /** + * Gets the negative suffix. + * + * @return The negative suffix. + */ + public String getNegativeSuffix() + { + return negativeSuffix; + } + + /** + * Gets the positive prefix. + * + * @return The positive prefix. + */ + public String getPositivePrefix() + { + return positivePrefix; + } + + /** + * Gets the positive suffix. + * + * @return The positive suffix. + */ + public String getPositiveSuffix() + { + return positiveSuffix; + } + + public boolean isDecimalSeparatorAlwaysShown() + { + return decimalSeparatorAlwaysShown; + } + + /** + * Define if parse(java.lang.String, java.text.ParsePosition) + * should return a {@link BigDecimal} or not. + * + * @param newValue + */ + public void setParseBigDecimal(boolean newValue) + { + this.parseBigDecimal = newValue; + } + + /** + * Returns true if + * parse(java.lang.String, java.text.ParsePosition) returns + * a BigDecimal, false otherwise. + * The default return value for this method is false. + * + * @return true if the parse method returns a {@link BigDecimal}, + * false otherwise. + * @since 1.5 + * @see #setParseBigDecimal(boolean) + */ + public boolean isParseBigDecimal() + { + return this.parseBigDecimal; + } + + /** + * This method parses the specified string into a Number. + * + * The parsing starts at pos, which is updated as the parser + * consume characters in the passed string. + * On error, the Position object index is not updated, while + * error position is set appropriately, an null is returned. + * + * @param str The string to parse. + * @param pos The desired ParsePosition. + * + * @return The parsed Number + */ + public Number parse(String str, ParsePosition pos) + { + // a special values before anything else + // NaN + if (str.contains(this.symbols.getNaN())) + return Double.valueOf(Double.NaN); + + // this will be our final number + CPStringBuilder number = new CPStringBuilder(); + + // special character + char minus = symbols.getMinusSign(); + + // starting parsing position + int start = pos.getIndex(); + + // validate the string, it have to be in the + // same form as the format string or parsing will fail + String _negativePrefix = (this.negativePrefix.compareTo("") == 0 + ? minus + positivePrefix + : this.negativePrefix); + + // we check both prefixes, because one might be empty. + // We want to pick the longest prefix that matches. + int positiveLen = positivePrefix.length(); + int negativeLen = _negativePrefix.length(); + + boolean isNegative = str.startsWith(_negativePrefix); + boolean isPositive = str.startsWith(positivePrefix); + + if (isPositive && isNegative) + { + // By checking this way, we preserve ambiguity in the case + // where the negative format differs only in suffix. + if (negativeLen > positiveLen) + { + start += _negativePrefix.length(); + isNegative = true; + } + else + { + start += positivePrefix.length(); + isPositive = true; + if (negativeLen < positiveLen) + isNegative = false; + } + } + else if (isNegative) + { + start += _negativePrefix.length(); + isPositive = false; + } + else if (isPositive) + { + start += positivePrefix.length(); + isNegative = false; + } + else + { + pos.setErrorIndex(start); + return null; + } + + // other special characters used by the parser + char decimalSeparator = symbols.getDecimalSeparator(); + char zero = symbols.getZeroDigit(); + char exponent = symbols.getExponential(); + + // stop parsing position in the string + int stop = start + this.maximumIntegerDigits + maximumFractionDigits + 2; + + if (useExponentialNotation) + stop += minExponentDigits + 1; + + boolean inExponent = false; + + // correct the size of the end parsing flag + int len = str.length(); + if (len < stop) stop = len; + char groupingSeparator = symbols.getGroupingSeparator(); + + int i = start; + while (i < stop) + { + char ch = str.charAt(i); + i++; + + if (ch >= zero && ch <= (zero + 9)) + { + number.append(ch); + } + else if (this.parseIntegerOnly) + { + i--; + break; + } + else if (ch == decimalSeparator) + { + number.append('.'); + } + else if (ch == exponent) + { + number.append(ch); + inExponent = !inExponent; + } + else if ((ch == '+' || ch == '-' || ch == minus)) + { + if (inExponent) + number.append(ch); + else + { + i--; + break; + } + } + else + { + if (!groupingUsed || ch != groupingSeparator) + { + i--; + break; + } + } + } + + // 2nd special case: infinity + // XXX: need to be tested + if (str.contains(symbols.getInfinity())) + { + int inf = str.indexOf(symbols.getInfinity()); + pos.setIndex(inf); + + // FIXME: ouch, this is really ugly and lazy code... + if (this.parseBigDecimal) + { + if (isNegative) + return BigDecimal.valueOf(Double.NEGATIVE_INFINITY); + + return BigDecimal.valueOf(Double.POSITIVE_INFINITY); + } + + if (isNegative) + return Double.valueOf(Double.NEGATIVE_INFINITY); + + return Double.valueOf(Double.POSITIVE_INFINITY); + } + + // no number... + if (i == start || number.length() == 0) + { + pos.setErrorIndex(i); + return null; + } + + // now we have to check the suffix, done here after number parsing + // or the index will not be updated correctly... + boolean hasNegativeSuffix = str.endsWith(this.negativeSuffix); + boolean hasPositiveSuffix = str.endsWith(this.positiveSuffix); + boolean positiveEqualsNegative = negativeSuffix.equals(positiveSuffix); + + positiveLen = positiveSuffix.length(); + negativeLen = negativeSuffix.length(); + + if (isNegative && !hasNegativeSuffix) + { + pos.setErrorIndex(i); + return null; + } + else if (hasNegativeSuffix && + !positiveEqualsNegative && + (negativeLen > positiveLen)) + { + isNegative = true; + } + else if (!hasPositiveSuffix) + { + pos.setErrorIndex(i); + return null; + } + + if (isNegative) number.insert(0, '-'); + + pos.setIndex(i); + + // now we handle the return type + BigDecimal bigDecimal = new BigDecimal(number.toString()); + if (this.parseBigDecimal) + return bigDecimal; + + // want integer? + if (this.parseIntegerOnly) + return Long.valueOf(bigDecimal.longValue()); + + // 3th special case -0.0 + if (isNegative && (bigDecimal.compareTo(BigDecimal.ZERO) == 0)) + return Double.valueOf(-0.0); + + try + { + BigDecimal integer + = bigDecimal.setScale(0, BigDecimal.ROUND_UNNECESSARY); + return Long.valueOf(integer.longValue()); + } + catch (ArithmeticException e) + { + return Double.valueOf(bigDecimal.doubleValue()); + } + } + + /** + * Sets the Currency on the + * DecimalFormatSymbols used, which also sets the + * currency symbols on those symbols. + * + * @param currency The new Currency on the + * DecimalFormatSymbols. + */ + public void setCurrency(Currency currency) + { + Currency current = symbols.getCurrency(); + if (current != currency) + { + String oldSymbol = symbols.getCurrencySymbol(); + int len = oldSymbol.length(); + symbols.setCurrency(currency); + String newSymbol = symbols.getCurrencySymbol(); + int posPre = positivePrefix.indexOf(oldSymbol); + if (posPre != -1) + positivePrefix = positivePrefix.substring(0, posPre) + + newSymbol + positivePrefix.substring(posPre+len); + int negPre = negativePrefix.indexOf(oldSymbol); + if (negPre != -1) + negativePrefix = negativePrefix.substring(0, negPre) + + newSymbol + negativePrefix.substring(negPre+len); + int posSuf = positiveSuffix.indexOf(oldSymbol); + if (posSuf != -1) + positiveSuffix = positiveSuffix.substring(0, posSuf) + + newSymbol + positiveSuffix.substring(posSuf+len); + int negSuf = negativeSuffix.indexOf(oldSymbol); + if (negSuf != -1) + negativeSuffix = negativeSuffix.substring(0, negSuf) + + newSymbol + negativeSuffix.substring(negSuf+len); + } + } + + /** + * Sets the symbols used by this instance. This method makes a copy of + * the supplied symbols. + * + * @param newSymbols the symbols (null not permitted). + */ + public void setDecimalFormatSymbols(DecimalFormatSymbols newSymbols) + { + symbols = (DecimalFormatSymbols) newSymbols.clone(); + } + + /** + * Define if the decimal separator should be always visible or only + * visible when needed. This method as effect only on integer values. + * Pass true if you want the decimal separator to be + * always shown, false otherwise. + * + * @param newValue true if you want the decimal separator to be + * always shown, false otherwise. + */ + public void setDecimalSeparatorAlwaysShown(boolean newValue) + { + decimalSeparatorAlwaysShown = newValue; + } + + /** + * Sets the number of digits used to group portions of the integer part of + * the number. For example, the number 123456, with a grouping + * size of 3, is rendered 123,456. + * + * @param groupSize The number of digits used while grouping portions + * of the integer part of a number. + */ + public void setGroupingSize(int groupSize) + { + groupingSize = (byte) groupSize; + } + + /** + * Sets the maximum number of digits allowed in the integer + * portion of a number to the specified value. + * The new value will be the choosen as the minimum between + * newvalue and 309. Any value below zero will be + * replaced by zero. + * + * @param newValue The new maximum integer digits value. + */ + public void setMaximumIntegerDigits(int newValue) + { + newValue = (newValue > 0) ? newValue : 0; + super.setMaximumIntegerDigits(Math.min(newValue, DEFAULT_INTEGER_DIGITS)); + } + + /** + * Sets the minimum number of digits allowed in the integer + * portion of a number to the specified value. + * The new value will be the choosen as the minimum between + * newvalue and 309. Any value below zero will be + * replaced by zero. + * + * @param newValue The new minimum integer digits value. + */ + public void setMinimumIntegerDigits(int newValue) + { + newValue = (newValue > 0) ? newValue : 0; + super.setMinimumIntegerDigits(Math.min(newValue, DEFAULT_INTEGER_DIGITS)); + } + + /** + * Sets the maximum number of digits allowed in the fraction + * portion of a number to the specified value. + * The new value will be the choosen as the minimum between + * newvalue and 309. Any value below zero will be + * replaced by zero. + * + * @param newValue The new maximum fraction digits value. + */ + public void setMaximumFractionDigits(int newValue) + { + newValue = (newValue > 0) ? newValue : 0; + super.setMaximumFractionDigits(Math.min(newValue, DEFAULT_FRACTION_DIGITS)); + } + + /** + * Sets the minimum number of digits allowed in the fraction + * portion of a number to the specified value. + * The new value will be the choosen as the minimum between + * newvalue and 309. Any value below zero will be + * replaced by zero. + * + * @param newValue The new minimum fraction digits value. + */ + public void setMinimumFractionDigits(int newValue) + { + newValue = (newValue > 0) ? newValue : 0; + super.setMinimumFractionDigits(Math.min(newValue, DEFAULT_FRACTION_DIGITS)); + } + + /** + * Sets the multiplier for use in percent and similar formats. + * For example, for percent set the multiplier to 100, for permille, set the + * miltiplier to 1000. + * + * @param newValue the new value for multiplier. + */ + public void setMultiplier(int newValue) + { + multiplier = newValue; + } + + /** + * Sets the negative prefix. + * + * @param newValue The new negative prefix. + */ + public void setNegativePrefix(String newValue) + { + negativePrefix = newValue; + } + + /** + * Sets the negative suffix. + * + * @param newValue The new negative suffix. + */ + public void setNegativeSuffix(String newValue) + { + negativeSuffix = newValue; + } + + /** + * Sets the positive prefix. + * + * @param newValue The new positive prefix. + */ + public void setPositivePrefix(String newValue) + { + positivePrefix = newValue; + } + + /** + * Sets the new positive suffix. + * + * @param newValue The new positive suffix. + */ + public void setPositiveSuffix(String newValue) + { + positiveSuffix = newValue; + } + + /** + * This method returns a string with the formatting pattern being used + * by this object. The string is localized. + * + * @return A localized String with the formatting pattern. + * @see #toPattern() + */ + public String toLocalizedPattern() + { + return computePattern(this.symbols); + } + + /** + * This method returns a string with the formatting pattern being used + * by this object. The string is not localized. + * + * @return A String with the formatting pattern. + * @see #toLocalizedPattern() + */ + public String toPattern() + { + return computePattern(nonLocalizedSymbols); + } + + /* ***** private methods ***** */ + + /** + * This is an shortcut helper method used to test if two given strings are + * equals. + * + * @param s1 The first string to test for equality. + * @param s2 The second string to test for equality. + * @return true if the strings are both null or + * equals. + */ + private boolean equals(String s1, String s2) + { + if (s1 == null || s2 == null) + return s1 == s2; + return s1.equals(s2); + } + + + /* ****** PATTERN ****** */ + + /** + * This helper function creates a string consisting of all the + * characters which can appear in a pattern and must be quoted. + */ + private String patternChars (DecimalFormatSymbols syms) + { + CPStringBuilder buf = new CPStringBuilder (); + + buf.append(syms.getDecimalSeparator()); + buf.append(syms.getDigit()); + buf.append(syms.getExponential()); + buf.append(syms.getGroupingSeparator()); + buf.append(syms.getMinusSign()); + buf.append(syms.getPatternSeparator()); + buf.append(syms.getPercent()); + buf.append(syms.getPerMill()); + buf.append(syms.getZeroDigit()); + buf.append('\''); + buf.append('\u00a4'); + + return buf.toString(); + } + + /** + * Quote special characters as defined by patChars in the + * input string. + * + * @param text + * @param patChars + * @return A StringBuffer with special characters quoted. + */ + private CPStringBuilder quoteFix(String text, String patChars) + { + CPStringBuilder buf = new CPStringBuilder(); + + int len = text.length(); + char ch; + for (int index = 0; index < len; ++index) + { + ch = text.charAt(index); + if (patChars.indexOf(ch) != -1) + { + buf.append('\''); + buf.append(ch); + if (ch != '\'') buf.append('\''); + } + else + { + buf.append(ch); + } + } + + return buf; + } + + /** + * Returns the format pattern, localized to follow the given + * symbols. + */ + private String computePattern(DecimalFormatSymbols symbols) + { + StringBuilder mainPattern = new StringBuilder(); + + // We have to at least emit a zero for the minimum number of + // digits. Past that we need hash marks up to the grouping + // separator (and one beyond). + int _groupingSize = groupingUsed ? groupingSize + 1: groupingSize; + int totalDigits = Math.max(minimumIntegerDigits, _groupingSize); + + // if it is not in exponential notiation, + // we always have a # prebended + if (!useExponentialNotation) mainPattern.append(symbols.getDigit()); + + for (int i = 1; i < totalDigits - minimumIntegerDigits; i++) + mainPattern.append(symbols.getDigit()); + + for (int i = totalDigits - minimumIntegerDigits; i < totalDigits; i++) + mainPattern.append(symbols.getZeroDigit()); + + if (groupingUsed) + { + mainPattern.insert(mainPattern.length() - groupingSize, + symbols.getGroupingSeparator()); + } + + // See if we need decimal info. + if (minimumFractionDigits > 0 || maximumFractionDigits > 0 || + decimalSeparatorAlwaysShown) + { + mainPattern.append(symbols.getDecimalSeparator()); + } + + for (int i = 0; i < minimumFractionDigits; ++i) + mainPattern.append(symbols.getZeroDigit()); + + for (int i = minimumFractionDigits; i < maximumFractionDigits; ++i) + mainPattern.append(symbols.getDigit()); + + if (useExponentialNotation) + { + mainPattern.append(symbols.getExponential()); + + for (int i = 0; i < minExponentDigits; ++i) + mainPattern.append(symbols.getZeroDigit()); + + if (minExponentDigits == 0) + mainPattern.append(symbols.getDigit()); + } + + // save the pattern + String pattern = mainPattern.toString(); + + // so far we have the pattern itself, now we need to add + // the positive and the optional negative prefixes and suffixes + String patternChars = patternChars(symbols); + mainPattern.insert(0, quoteFix(positivePrefix, patternChars)); + mainPattern.append(quoteFix(positiveSuffix, patternChars)); + + if (hasNegativePrefix) + { + mainPattern.append(symbols.getPatternSeparator()); + mainPattern.append(quoteFix(negativePrefix, patternChars)); + mainPattern.append(pattern); + mainPattern.append(quoteFix(negativeSuffix, patternChars)); + } + + // finally, return the pattern string + return mainPattern.toString(); + } + + /* ****** FORMAT PARSING ****** */ + + /** + * Scan the input string and define a pattern suitable for use + * with this decimal format. + * + * @param pattern + * @param symbols + */ + private void applyPatternWithSymbols(String pattern, + DecimalFormatSymbols symbols) + { + // The pattern string is described by a BNF diagram. + // we could use a recursive parser to read and prepare + // the string, but this would be too slow and resource + // intensive, while this code is quite critical as it is + // called always when the class is instantiated and every + // time a new pattern is given. + // Our strategy is to divide the string into section as given by + // the BNF diagram, iterating through the string and setting up + // the parameters we need for formatting (which is basicly what + // a descendent recursive parser would do - but without recursion). + // I'm sure that there are smarter methods to do this. + + // Restore default values. Most of these will be overwritten + // but we want to be sure that nothing is left out. + setDefaultValues(); + + int len = pattern.length(); + if (len == 0) + { + // this is another special case... + this.minimumIntegerDigits = 1; + this.maximumIntegerDigits = DEFAULT_INTEGER_DIGITS; + this.minimumFractionDigits = 0; + this.maximumFractionDigits = DEFAULT_FRACTION_DIGITS; + + // FIXME: ...and these values may not be valid in all locales + this.minExponentDigits = 0; + this.showDecimalSeparator = true; + this.groupingUsed = true; + this.groupingSize = 3; + + return; + } + + int start = scanFix(pattern, symbols, 0, true); + if (start < len) start = scanNumberInteger(pattern, symbols, start); + if (start < len) + { + start = scanFractionalPortion(pattern, symbols, start); + } + else + { + // special case, pattern that ends here does not have a fractional + // portion + this.minimumFractionDigits = 0; + this.maximumFractionDigits = 0; + //this.decimalSeparatorAlwaysShown = false; + //this.showDecimalSeparator = false; + } + + // XXX: this fixes a compatibility test with the RI. + // If new uses cases fail, try removing this line first. + //if (!this.hasIntegerPattern && !this.hasFractionalPattern) + // throw new IllegalArgumentException("No valid pattern found!"); + + if (start < len) start = scanExponent(pattern, symbols, start); + if (start < len) start = scanFix(pattern, symbols, start, false); + if (start < len) scanNegativePattern(pattern, symbols, start); + + if (useExponentialNotation && + (maxIntegerDigitsExponent > minimumIntegerDigits) && + (maxIntegerDigitsExponent > 1)) + { + minimumIntegerDigits = 1; + exponentRound = maxIntegerDigitsExponent; + } + + if (useExponentialNotation) + maximumIntegerDigits = maxIntegerDigitsExponent; + + if (!this.hasFractionalPattern && this.showDecimalSeparator == true) + { + this.decimalSeparatorAlwaysShown = true; + } + } + + /** + * Scans for the prefix or suffix portion of the pattern string. + * This method handles the positive subpattern of the pattern string. + * + * @param pattern The pattern string to parse. + * @return The position in the pattern string where parsing ended. + */ + private int scanFix(String pattern, DecimalFormatSymbols sourceSymbols, + int start, boolean prefix) + { + CPStringBuilder buffer = new CPStringBuilder(); + + // the number portion is always delimited by one of those + // characters + char decimalSeparator = sourceSymbols.getDecimalSeparator(); + char patternSeparator = sourceSymbols.getPatternSeparator(); + char groupingSeparator = sourceSymbols.getGroupingSeparator(); + char digit = sourceSymbols.getDigit(); + char zero = sourceSymbols.getZeroDigit(); + char minus = sourceSymbols.getMinusSign(); + + // other special characters, cached here to avoid method calls later + char percent = sourceSymbols.getPercent(); + char permille = sourceSymbols.getPerMill(); + + String currencySymbol = this.symbols.getCurrencySymbol(); + + boolean quote = false; + + char ch = pattern.charAt(start); + if (ch == patternSeparator) + { + // negative subpattern + this.hasNegativePrefix = true; + ++start; + return start; + } + + int len = pattern.length(); + int i; + for (i = start; i < len; i++) + { + ch = pattern.charAt(i); + + // we are entering into the negative subpattern + if (!quote && ch == patternSeparator) + { + if (this.hasNegativePrefix) + { + throw new IllegalArgumentException("Invalid pattern found: " + + start); + } + + this.hasNegativePrefix = true; + ++i; + break; + } + + // this means we are inside the number portion + if (!quote && + (ch == minus || ch == digit || ch == zero || + ch == groupingSeparator)) + break; + + if (!quote && ch == decimalSeparator) + { + this.showDecimalSeparator = true; + break; + } + else if (quote && ch != '\'') + { + buffer.append(ch); + continue; + } + + if (ch == '\u00A4') + { + // CURRENCY + currencySymbol = this.symbols.getCurrencySymbol(); + + // if \u00A4 is doubled, we use the international currency symbol + if ((i + 1) < len && pattern.charAt(i + 1) == '\u00A4') + { + currencySymbol = this.symbols.getInternationalCurrencySymbol(); + i++; + } + + this.useCurrencySeparator = true; + buffer.append(currencySymbol); + } + else if (ch == percent) + { + // PERCENT + this.multiplier = 100; + buffer.append(this.symbols.getPercent()); + } + else if (ch == permille) + { + // PERMILLE + this.multiplier = 1000; + buffer.append(this.symbols.getPerMill()); + } + else if (ch == '\'') + { + // QUOTE + if ((i + 1) < len && pattern.charAt(i + 1) == '\'') + { + // we need to add ' to the buffer + buffer.append(ch); + i++; + } + else + { + quote = !quote; + continue; + } + } + else + { + buffer.append(ch); + } + } + + if (prefix) + { + this.positivePrefix = buffer.toString(); + this.negativePrefix = minus + "" + positivePrefix; + } + else + { + this.positiveSuffix = buffer.toString(); + } + + return i; + } + + /** + * Scan the given string for number patterns, starting + * from start. + * This method searches the integer part of the pattern only. + * + * @param pattern The pattern string to parse. + * @param start The starting parse position in the string. + * @return The position in the pattern string where parsing ended, + * counted from the beginning of the string (that is, 0). + */ + private int scanNumberInteger(String pattern, DecimalFormatSymbols symbols, + int start) + { + char digit = symbols.getDigit(); + char zero = symbols.getZeroDigit(); + char groupingSeparator = symbols.getGroupingSeparator(); + char decimalSeparator = symbols.getDecimalSeparator(); + char exponent = symbols.getExponential(); + char patternSeparator = symbols.getPatternSeparator(); + + // count the number of zeroes in the pattern + // this number defines the minum digits in the integer portion + int zeros = 0; + + // count the number of digits used in grouping + int _groupingSize = 0; + + this.maxIntegerDigitsExponent = 0; + + boolean intPartTouched = false; + + char ch; + int len = pattern.length(); + int i; + for (i = start; i < len; i++) + { + ch = pattern.charAt(i); + + // break on decimal separator or exponent or pattern separator + if (ch == decimalSeparator || ch == exponent) + break; + + if (this.hasNegativePrefix && ch == patternSeparator) + throw new IllegalArgumentException("Invalid pattern found: " + + start); + + if (ch == digit) + { + // in our implementation we could relax this strict + // requirement, but this is used to keep compatibility with + // the RI + if (zeros > 0) throw new + IllegalArgumentException("digit mark following zero in " + + "positive subpattern, not allowed. Position: " + i); + + _groupingSize++; + intPartTouched = true; + this.maxIntegerDigitsExponent++; + } + else if (ch == zero) + { + zeros++; + _groupingSize++; + this.maxIntegerDigitsExponent++; + } + else if (ch == groupingSeparator) + { + this.groupingSeparatorInPattern = true; + this.groupingUsed = true; + _groupingSize = 0; + } + else + { + // any other character not listed above + // means we are in the suffix portion + break; + } + } + + if (groupingSeparatorInPattern) this.groupingSize = (byte) _groupingSize; + this.minimumIntegerDigits = zeros; + + // XXX: compatibility code with the RI: the number of minimum integer + // digits is at least one when maximumIntegerDigits is more than zero + if (intPartTouched && this.maximumIntegerDigits > 0 && + this.minimumIntegerDigits == 0) + this.minimumIntegerDigits = 1; + + return i; + } + + /** + * Scan the given string for number patterns, starting + * from start. + * This method searches the fractional part of the pattern only. + * + * @param pattern The pattern string to parse. + * @param start The starting parse position in the string. + * @return The position in the pattern string where parsing ended, + * counted from the beginning of the string (that is, 0). + */ + private int scanFractionalPortion(String pattern, + DecimalFormatSymbols symbols, + int start) + { + char digit = symbols.getDigit(); + char zero = symbols.getZeroDigit(); + char groupingSeparator = symbols.getGroupingSeparator(); + char decimalSeparator = symbols.getDecimalSeparator(); + char exponent = symbols.getExponential(); + char patternSeparator = symbols.getPatternSeparator(); + + // first character needs to be '.' otherwise we are not parsing the + // fractional portion + char ch = pattern.charAt(start); + if (ch != decimalSeparator) + { + this.minimumFractionDigits = 0; + this.maximumFractionDigits = 0; + return start; + } + + ++start; + + this.hasFractionalPattern = true; + + this.minimumFractionDigits = 0; + int digits = 0; + + int len = pattern.length(); + int i; + for (i = start; i < len; i++) + { + ch = pattern.charAt(i); + + // we hit the exponential or negative subpattern + if (ch == exponent || ch == patternSeparator) + break; + + // pattern error + if (ch == groupingSeparator || ch == decimalSeparator) throw new + IllegalArgumentException("unexpected character '" + ch + "' " + + "in fractional subpattern. Position: " + i); + + if (ch == digit) + { + digits++; + } + else if (ch == zero) + { + if (digits > 0) throw new + IllegalArgumentException("digit mark following zero in " + + "positive subpattern, not allowed. Position: " + i); + + this.minimumFractionDigits++; + } + else + { + // we are in the suffix section of pattern + break; + } + } + + if (i == start) this.hasFractionalPattern = false; + + this.maximumFractionDigits = this.minimumFractionDigits + digits; + this.showDecimalSeparator = true; + + return i; + } + + /** + * Scan the given string for number patterns, starting + * from start. + * This method searches the expoential part of the pattern only. + * + * @param pattern The pattern string to parse. + * @param start The starting parse position in the string. + * @return The position in the pattern string where parsing ended, + * counted from the beginning of the string (that is, 0). + */ + private int scanExponent(String pattern, DecimalFormatSymbols symbols, + int start) + { + char digit = symbols.getDigit(); + char zero = symbols.getZeroDigit(); + char groupingSeparator = symbols.getGroupingSeparator(); + char decimalSeparator = symbols.getDecimalSeparator(); + char exponent = symbols.getExponential(); + + char ch = pattern.charAt(start); + + if (ch == decimalSeparator) + { + // ignore dots + ++start; + } + + if (ch != exponent) + { + this.useExponentialNotation = false; + return start; + } + + ++start; + + this.minExponentDigits = 0; + + int len = pattern.length(); + int i; + for (i = start; i < len; i++) + { + ch = pattern.charAt(i); + + if (ch == groupingSeparator || ch == decimalSeparator || + ch == digit || ch == exponent) throw new + IllegalArgumentException("unexpected character '" + ch + "' " + + "in exponential subpattern. Position: " + i); + + if (ch == zero) + { + this.minExponentDigits++; + } + else + { + // any character other than zero is an exit point + break; + } + } + + this.useExponentialNotation = true; + + return i; + } + + /** + * Scan the given string for number patterns, starting + * from start. + * This method searches the negative part of the pattern only and scan + * throught the end of the string. + * + * @param pattern The pattern string to parse. + * @param start The starting parse position in the string. + */ + private void scanNegativePattern(String pattern, + DecimalFormatSymbols sourceSymbols, + int start) + { + StringBuilder buffer = new StringBuilder(); + + // the number portion is always delimited by one of those + // characters + char decimalSeparator = sourceSymbols.getDecimalSeparator(); + char patternSeparator = sourceSymbols.getPatternSeparator(); + char groupingSeparator = sourceSymbols.getGroupingSeparator(); + char digit = sourceSymbols.getDigit(); + char zero = sourceSymbols.getZeroDigit(); + char minus = sourceSymbols.getMinusSign(); + + // other special charcaters, cached here to avoid method calls later + char percent = sourceSymbols.getPercent(); + char permille = sourceSymbols.getPerMill(); + + String CURRENCY_SYMBOL = this.symbols.getCurrencySymbol(); + String currencySymbol = CURRENCY_SYMBOL; + + boolean quote = false; + boolean prefixDone = false; + + int len = pattern.length(); + if (len > 0) this.hasNegativePrefix = true; + + char ch = pattern.charAt(start); + if (ch == patternSeparator) + { + // no pattern separator in the negative pattern + if ((start + 1) > len) throw new + IllegalArgumentException("unexpected character '" + ch + "' " + + "in negative subpattern."); + start++; + } + + int i; + for (i = start; i < len; i++) + { + ch = pattern.charAt(i); + + // this means we are inside the number portion + if (!quote && + (ch == digit || ch == zero || ch == decimalSeparator || + ch == patternSeparator || ch == groupingSeparator)) + { + if (!prefixDone) + { + this.negativePrefix = buffer.toString(); + buffer.delete(0, buffer.length()); + prefixDone = true; + } + } + else if (ch == minus) + { + buffer.append(this.symbols.getMinusSign()); + } + else if (quote && ch != '\'') + { + buffer.append(ch); + } + else if (ch == '\u00A4') + { + // CURRENCY + currencySymbol = CURRENCY_SYMBOL; + + // if \u00A4 is doubled, we use the international currency symbol + if ((i + 1) < len && pattern.charAt(i + 1) == '\u00A4') + { + currencySymbol = this.symbols.getInternationalCurrencySymbol(); + i = i + 2; + } + + // FIXME: not sure about this, the specs says that we only have to + // change prefix and suffix, so leave it as commented + // unless in case of bug report/errors + //this.useCurrencySeparator = true; + + buffer.append(currencySymbol); + } + else if (ch == percent) + { + // PERCENT + this.negativePatternMultiplier = 100; + buffer.append(this.symbols.getPercent()); + } + else if (ch == permille) + { + // PERMILLE + this.negativePatternMultiplier = 1000; + buffer.append(this.symbols.getPerMill()); + } + else if (ch == '\'') + { + // QUOTE + if ((i + 1) < len && pattern.charAt(i + 1) == '\'') + { + // we need to add ' to the buffer + buffer.append(ch); + i++; + } + else + { + quote = !quote; + } + } + else if (ch == patternSeparator) + { + // no pattern separator in the negative pattern + throw new IllegalArgumentException("unexpected character '" + ch + + "' in negative subpattern."); + } + else + { + buffer.append(ch); + } + } + + if (prefixDone) + this.negativeSuffix = buffer.toString(); + else + this.negativePrefix = buffer.toString(); + } + + /* ****** FORMATTING ****** */ + + /** + * Handles the real formatting. + * + * We use a BigDecimal to format the number without precision loss. + * All the rounding is done by methods in BigDecimal. + * The isLong parameter is used to determine if we are + * formatting a long or BigInteger. In this case, we avoid to format + * the fractional part of the number (unless specified otherwise in the + * format string) that would consist only of a 0 digit. + * + * @param number A BigDecimal representation fo the input number. + * @param dest The destination buffer. + * @param isLong A boolean that indicates if this BigDecimal is a real + * decimal or an integer. + * @param fieldPos Use to keep track of the formatting position. + */ + private void formatInternal(BigDecimal number, boolean isLong, + StringBuffer dest, FieldPosition fieldPos) + { + // The specs says that fieldPos should not be null, and that we + // should throw a NPE, but it seems that in few classes that + // reference this one, fieldPos is set to null. + // This is even defined in the javadoc, see for example MessageFormat. + // I think the best here is to check for fieldPos and build one if it is + // null. If it cause harms or regressions, just remove this line and + // fix the classes in the point of call, insted. + if (fieldPos == null) fieldPos = new FieldPosition(0); + + int _multiplier = this.multiplier; + + // used to track attribute starting position for each attribute + int attributeStart = -1; + + // now get the sign this will be used by the special case Inifinity + // and by the normal cases. + boolean isNegative = (number.signum() < 0) ? true : false; + if (isNegative) + { + attributeStart = dest.length(); + + // append the negative prefix to the string + dest.append(negativePrefix); + + // once got the negative prefix, we can use + // the absolute value. + number = number.abs(); + + _multiplier = negativePatternMultiplier; + + addAttribute(Field.SIGN, attributeStart, dest.length()); + } + else + { + // not negative, use the positive prefix + dest.append(positivePrefix); + } + + // these are used ot update the field position + int beginIndexInt = dest.length(); + int endIndexInt = 0; + int beginIndexFract = 0; + int endIndexFract = 0; + + // compute the multiplier to use with percent and similar + number = number.multiply(BigDecimal.valueOf(_multiplier)); + + // XXX: special case, not sure if it belongs here or if it is + // correct at all. There may be other special cases as well + // these should be handled in the format string parser. + if (this.maximumIntegerDigits == 0 && this.maximumFractionDigits == 0) + { + number = BigDecimal.ZERO; + this.maximumIntegerDigits = 1; + this.minimumIntegerDigits = 1; + } + + // get the absolute number + number = number.abs(); + + // the scaling to use while formatting this number + int scale = this.maximumFractionDigits; + + // this is the actual number we will use + // it is corrected later on to handle exponential + // notation, if needed + long exponent = 0; + + // are we using exponential notation? + if (this.useExponentialNotation) + { + exponent = getExponent(number); + number = number.movePointLeft((int) exponent); + + // FIXME: this makes the test ##.###E0 to pass, + // but all all the other tests to fail... + // this should be really something like + // min + max - what is already shown... + //scale = this.minimumIntegerDigits + this.maximumFractionDigits; + } + + // round the number to the nearest neighbor + number = number.setScale(scale, BigDecimal.ROUND_HALF_EVEN); + + // now get the integer and fractional part of the string + // that will be processed later + String plain = number.toPlainString(); + + String intPart = null; + String fractPart = null; + + // remove - from the integer part, this is needed as + // the Narrowing Primitive Conversions algorithm used may loose + // information about the sign + int minusIndex = plain.lastIndexOf('-', 0); + if (minusIndex > -1) plain = plain.substring(minusIndex + 1); + + // strip the decimal portion + int dot = plain.indexOf('.'); + if (dot > -1) + { + intPart = plain.substring(0, dot); + dot++; + + if (useExponentialNotation) + fractPart = plain.substring(dot, dot + scale); + else + fractPart = plain.substring(dot); + } + else + { + intPart = plain; + } + + // used in various places later on + int intPartLen = intPart.length(); + endIndexInt = intPartLen; + + // if the number of digits in our intPart is not greater than the + // minimum we have to display, we append zero to the destination + // buffer before adding the integer portion of the number. + int zeroes = minimumIntegerDigits - intPartLen; + if (zeroes > 0) + { + attributeStart = Math.max(dest.length() - 1, 0); + appendZero(dest, zeroes, minimumIntegerDigits); + } + + if (this.useExponentialNotation) + { + // For exponential numbers, the significant in mantissa are + // the sum of the minimum integer and maximum fraction + // digits, and does not take into account the maximun integer + // digits to display. + + if (attributeStart < 0) + attributeStart = Math.max(dest.length() - 1, 0); + appendDigit(intPart, dest, this.groupingUsed); + } + else + { + // non exponential notation + intPartLen = intPart.length(); + int canary = Math.min(intPartLen, this.maximumIntegerDigits); + + // remove from the string the number in excess + // use only latest digits + intPart = intPart.substring(intPartLen - canary); + endIndexInt = intPart.length() + 1; + + // append it + if (maximumIntegerDigits > 0 && + !(this.minimumIntegerDigits == 0 && + intPart.compareTo(String.valueOf(symbols.getZeroDigit())) == 0)) + { + if (attributeStart < 0) + attributeStart = Math.max(dest.length() - 1, 0); + appendDigit(intPart, dest, this.groupingUsed); + } + } + + // add the INTEGER attribute + addAttribute(Field.INTEGER, attributeStart, dest.length()); + + // ...update field position, if needed, and return... + if ((fieldPos.getField() == INTEGER_FIELD || + fieldPos.getFieldAttribute() == NumberFormat.Field.INTEGER)) + { + fieldPos.setBeginIndex(beginIndexInt); + fieldPos.setEndIndex(endIndexInt); + } + + handleFractionalPart(dest, fractPart, fieldPos, isLong); + + // and the exponent + if (this.useExponentialNotation) + { + attributeStart = dest.length(); + + dest.append(symbols.getExponential()); + + addAttribute(Field.EXPONENT_SYMBOL, attributeStart, dest.length()); + attributeStart = dest.length(); + + if (exponent < 0) + { + dest.append(symbols.getMinusSign()); + exponent = -exponent; + + addAttribute(Field.EXPONENT_SIGN, attributeStart, dest.length()); + } + + attributeStart = dest.length(); + + String exponentString = String.valueOf(exponent); + int exponentLength = exponentString.length(); + + for (int i = 0; i < minExponentDigits - exponentLength; i++) + dest.append(symbols.getZeroDigit()); + + for (int i = 0; i < exponentLength; ++i) + dest.append(exponentString.charAt(i)); + + addAttribute(Field.EXPONENT, attributeStart, dest.length()); + } + + // now include the suffixes... + if (isNegative) + { + dest.append(negativeSuffix); + } + else + { + dest.append(positiveSuffix); + } + } + + /** + * Add to the input buffer the result of formatting the fractional + * portion of the number. + * + * @param dest + * @param fractPart + * @param fieldPos + * @param isLong + */ + private void handleFractionalPart(StringBuffer dest, String fractPart, + FieldPosition fieldPos, boolean isLong) + { + int dotStart = 0; + int dotEnd = 0; + boolean addDecimal = false; + + if (this.decimalSeparatorAlwaysShown || + ((!isLong || this.useExponentialNotation) && + this.showDecimalSeparator && this.maximumFractionDigits > 0) || + this.minimumFractionDigits > 0) + { + dotStart = dest.length(); + + if (this.useCurrencySeparator) + dest.append(symbols.getMonetaryDecimalSeparator()); + else + dest.append(symbols.getDecimalSeparator()); + + dotEnd = dest.length(); + addDecimal = true; + } + + // now handle the fraction portion of the number + int fractStart = 0; + int fractEnd = 0; + boolean addFractional = false; + + if ((!isLong || this.useExponentialNotation) + && this.maximumFractionDigits > 0 + || this.minimumFractionDigits > 0) + { + fractStart = dest.length(); + fractEnd = fractStart; + + int digits = this.minimumFractionDigits; + + if (this.useExponentialNotation) + { + digits = (this.minimumIntegerDigits + this.minimumFractionDigits) + - dest.length(); + if (digits < 0) digits = 0; + } + + fractPart = adjustTrailingZeros(fractPart, digits); + + // FIXME: this code must be improved + // now check if the factional part is just 0, in this case + // we need to remove the '.' unless requested + boolean allZeros = true; + char fracts[] = fractPart.toCharArray(); + for (int i = 0; i < fracts.length; i++) + { + if (fracts[i] != '0') + allZeros = false; + } + + if (!allZeros || (minimumFractionDigits > 0)) + { + appendDigit(fractPart, dest, false); + fractEnd = dest.length(); + + addDecimal = true; + addFractional = true; + } + else if (!this.decimalSeparatorAlwaysShown) + { + dest.deleteCharAt(dest.length() - 1); + addDecimal = false; + } + else + { + fractEnd = dest.length(); + addFractional = true; + } + } + + if (addDecimal) + addAttribute(Field.DECIMAL_SEPARATOR, dotStart, dotEnd); + + if (addFractional) + addAttribute(Field.FRACTION, fractStart, fractEnd); + + if ((fieldPos.getField() == FRACTION_FIELD || + fieldPos.getFieldAttribute() == NumberFormat.Field.FRACTION)) + { + fieldPos.setBeginIndex(fractStart); + fieldPos.setEndIndex(fractEnd); + } + } + + /** + * Append to destthe give number of zeros. + * Grouping is added if needed. + * The integer totalDigitCount defines the total number of digits + * of the number to which we are appending zeroes. + */ + private void appendZero(StringBuffer dest, int zeroes, int totalDigitCount) + { + char ch = symbols.getZeroDigit(); + char gSeparator = symbols.getGroupingSeparator(); + + int i = 0; + int gPos = totalDigitCount; + for (i = 0; i < zeroes; i++, gPos--) + { + if (this.groupingSeparatorInPattern && + (this.groupingUsed && this.groupingSize != 0) && + (gPos % groupingSize == 0 && i > 0)) + dest.append(gSeparator); + + dest.append(ch); + } + + // special case, that requires adding an additional separator + if (this.groupingSeparatorInPattern && + (this.groupingUsed && this.groupingSize != 0) && + (gPos % groupingSize == 0)) + dest.append(gSeparator); + } + + /** + * Append src to dest. + * + * Grouping is added if groupingUsed is set + * to true. + */ + private void appendDigit(String src, StringBuffer dest, + boolean groupingUsed) + { + int zero = symbols.getZeroDigit() - '0'; + + int ch; + char gSeparator = symbols.getGroupingSeparator(); + + int len = src.length(); + for (int i = 0, gPos = len; i < len; i++, gPos--) + { + ch = src.charAt(i); + if (groupingUsed && this.groupingSize != 0 && + gPos % groupingSize == 0 && i > 0) + dest.append(gSeparator); + + dest.append((char) (zero + ch)); + } + } + + /** + * Calculate the exponent to use if eponential notation is used. + * The exponent is calculated as a power of ten. + * number should be positive, if is zero, or less than zero, + * zero is returned. + */ + private long getExponent(BigDecimal number) + { + long exponent = 0; + + if (number.signum() > 0) + { + double _number = number.doubleValue(); + exponent = (long) Math.floor (Math.log10(_number)); + + // get the right value for the exponent + exponent = exponent - (exponent % this.exponentRound); + + // if the minimumIntegerDigits is more than zero + // we display minimumIntegerDigits of digits. + // so, for example, if minimumIntegerDigits == 2 + // and the actual number is 0.123 it will be + // formatted as 12.3E-2 + // this means that the exponent have to be shifted + // to the correct value. + if (minimumIntegerDigits > 0) + exponent -= minimumIntegerDigits - 1; + } + + return exponent; + } + + /** + * Remove contiguos zeros from the end of the src string, + * if src contains more than minimumDigits digits. + * if src contains less that minimumDigits, + * then append zeros to the string. + * + * Only the first block of zero digits is removed from the string + * and only if they fall in the src.length - minimumDigits + * portion of the string. + * + * @param src The string with the correct number of zeros. + */ + private String adjustTrailingZeros(String src, int minimumDigits) + { + int len = src.length(); + String result; + + // remove all trailing zero + if (len > minimumDigits) + { + int zeros = 0; + for (int i = len - 1; i > minimumDigits; i--) + { + if (src.charAt(i) == '0') + ++zeros; + else + break; + } + result = src.substring(0, len - zeros); + } + else + { + char zero = symbols.getZeroDigit(); + CPStringBuilder _result = new CPStringBuilder(src); + for (int i = len; i < minimumDigits; i++) + { + _result.append(zero); + } + result = _result.toString(); + } + + return result; + } + + /** + * Adds an attribute to the attributes list. + * + * @param field + * @param begin + * @param end + */ + private void addAttribute(Field field, int begin, int end) + { + /* + * This method and its implementation derives directly from the + * ICU4J (http://icu.sourceforge.net/) library, distributed under MIT/X. + */ + + FieldPosition pos = new FieldPosition(field); + pos.setBeginIndex(begin); + pos.setEndIndex(end); + attributes.add(pos); + } + + /** + * Sets the default values for the various properties in this DecimaFormat. + */ + private void setDefaultValues() + { + // Maybe we should add these values to the message bundle and take + // the most appropriate for them for any locale. + // Anyway, these seem to be good values for a default in most languages. + // Note that most of these will change based on the format string. + + this.negativePrefix = String.valueOf(symbols.getMinusSign()); + this.negativeSuffix = ""; + this.positivePrefix = ""; + this.positiveSuffix = ""; + + this.multiplier = 1; + this.negativePatternMultiplier = 1; + this.exponentRound = 1; + + this.hasNegativePrefix = false; + + this.minimumIntegerDigits = 1; + this.maximumIntegerDigits = DEFAULT_INTEGER_DIGITS; + this.minimumFractionDigits = 0; + this.maximumFractionDigits = DEFAULT_FRACTION_DIGITS; + this.minExponentDigits = 0; + + this.groupingSize = 0; + + this.decimalSeparatorAlwaysShown = false; + this.showDecimalSeparator = false; + this.useExponentialNotation = false; + this.groupingUsed = false; + this.groupingSeparatorInPattern = false; + + this.useCurrencySeparator = false; + + this.hasFractionalPattern = false; + } +} -- cgit v1.2.3