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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/javax/naming/CompoundName.java
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diff --git a/libjava/classpath/javax/naming/CompoundName.java b/libjava/classpath/javax/naming/CompoundName.java
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+/* CompoundName.java --
+ Copyright (C) 2001, 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. */
+
+
+package javax.naming;
+
+import gnu.java.lang.CPStringBuilder;
+
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.Serializable;
+import java.util.Enumeration;
+import java.util.NoSuchElementException;
+import java.util.Properties;
+import java.util.Vector;
+
+/**
+ * Represents hierarchical names from the single namespace. For instance,
+ * the path /home/audriusa/classpath/file.txt is the compound name, using
+ * the filesystem namespace.
+ *
+ * @author Tom Tromey (tromey@redhat.com)
+ * @date May 16, 2001
+ *
+ * FIXME: this class is underspecified. For instance, the `flat'
+ * direction is never described. If it means that the CompoundName
+ * can only have a single element, then the Enumeration-based
+ * constructor ought to throw InvalidNameException.
+ *
+ * @since 1.3
+ */
+public class CompoundName implements Name, Cloneable, Serializable
+{
+ private static final long serialVersionUID = 3513100557083972036L;
+
+ private CompoundName (Properties syntax)
+ {
+ elts = new Vector<String> ();
+ mySyntax = syntax;
+ initializeSyntax ();
+ }
+
+ protected CompoundName (Enumeration<String> comps, Properties syntax)
+ {
+ elts = new Vector<String> ();
+ mySyntax = syntax;
+ initializeSyntax ();
+ try
+ {
+ while (comps.hasMoreElements ())
+ elts.add (comps.nextElement ());
+ }
+ catch (NoSuchElementException ignore)
+ {
+ }
+ }
+
+ public CompoundName (String n, Properties syntax)
+ throws InvalidNameException
+ {
+ elts = new Vector<String> ();
+ mySyntax = syntax;
+ initializeSyntax ();
+
+ StringBuilder new_element = new StringBuilder ();
+ int i = 0;
+ // QUOTE==null means no quoting right now. When it is set it is
+ // the value of the closing quote.
+ String quote = null;
+ while (i < n.length ())
+ {
+ String special = isSpecial (n, i);
+
+ if (special == escape && escape != null)
+ {
+ if (n.length () == i + special.length ())
+ {
+ // A trailing escape is treated as itself.
+ new_element.append (special);
+ i += special.length ();
+ }
+ else
+ {
+ String eSpecial = isSpecial (n, i + special.length ());
+ if (eSpecial != null)
+ {
+ // Treat the escape as an escape.
+ new_element.append (eSpecial);
+ i += special.length () + eSpecial.length ();
+ }
+ else
+ {
+ // Treat the escape as itself.
+ new_element.append (special);
+ i += special.length ();
+ }
+ continue;
+ }
+ }
+ else if (quote != null)
+ {
+ // It is safe to use == here.
+ if (quote == special)
+ {
+ // Quotes must surround a complete component.
+ if (i + quote.length () < n.length ()
+ && ! n.startsWith (separator, i + quote.length ()))
+ throw new InvalidNameException ("close quote before end of component");
+ elts.add (new_element.toString ());
+ new_element.setLength (0);
+ i += quote.length ();
+ quote = null;
+ continue;
+ }
+ // Otherwise, fall through.
+ }
+ // Quotes are only special at the start of a component.
+ else if (new_element.length () == 0
+ && special == beginQuote
+ && beginQuote != null)
+ {
+ quote = endQuote;
+ i += special.length ();
+ continue;
+ }
+ else if (new_element.length () == 0
+ && special == beginQuote2
+ && beginQuote2 != null)
+ {
+ quote = endQuote2;
+ i += special.length ();
+ continue;
+ }
+ else if (direction != FLAT && special == separator)
+ {
+ elts.add (new_element.toString ());
+ new_element.setLength (0);
+ i += special.length ();
+ continue;
+ }
+
+ // Nothing in particular, so try the next character.
+ new_element.append (n.charAt (i));
+ ++i;
+ }
+
+ if (new_element.length () != 0)
+ elts.add (new_element.toString ());
+
+ if (direction == RIGHT_TO_LEFT)
+ {
+ // Reverse the order of the elements.
+ int len = elts.size ();
+ for (i = 0; i < len / 2; ++i)
+ {
+ String t = elts.set (i, elts.get (len - i - 1));
+ elts.set (len - i - 1, t);
+ }
+ }
+
+ // Error checking.
+ if (quote != null)
+ throw new InvalidNameException ("unterminated quote");
+ }
+
+ public Name add (int posn, String comp) throws InvalidNameException
+ {
+ elts.add (posn, comp);
+ return this;
+ }
+
+ public Name add (String comp) throws InvalidNameException
+ {
+ elts.add (comp);
+ return this;
+ }
+
+ public Name addAll (int posn, Name n) throws InvalidNameException
+ {
+ Enumeration<String> e = n.getAll ();
+ try
+ {
+ while (e.hasMoreElements ())
+ {
+ elts.add (posn, e.nextElement ());
+ ++posn;
+ }
+ }
+ catch (NoSuchElementException ignore)
+ {
+ }
+ return this;
+ }
+
+ public Name addAll (Name suffix) throws InvalidNameException
+ {
+ Enumeration<String> e = suffix.getAll ();
+ try
+ {
+ while (e.hasMoreElements ())
+ elts.add (e.nextElement ());
+ }
+ catch (NoSuchElementException ignore)
+ {
+ }
+ return this;
+ }
+
+ public Object clone ()
+ {
+ return new CompoundName (elts.elements (), mySyntax);
+ }
+
+ public int compareTo (Object obj)
+ {
+ if (! (obj instanceof CompoundName))
+ throw new ClassCastException ("CompoundName.compareTo() expected CompoundName");
+ CompoundName cn = (CompoundName) obj;
+ int last = Math.min (cn.elts.size (), elts.size ());
+ for (int i = 0; i < last; ++i)
+ {
+ String f = canonicalize (elts.get (i));
+ int comp = f.compareTo (canonicalize (cn.elts.get (i)));
+ if (comp != 0)
+ return comp;
+ }
+ return elts.size () - cn.elts.size ();
+ }
+
+ public boolean endsWith (Name n)
+ {
+ if (! (n instanceof CompoundName))
+ return false;
+ CompoundName cn = (CompoundName) n;
+ if (cn.elts.size () > elts.size ())
+ return false;
+ int delta = elts.size () - cn.elts.size ();
+ for (int i = 0; i < cn.elts.size (); ++i)
+ {
+ String f = canonicalize (elts.get (delta + i));
+ if (! f.equals (canonicalize (cn.elts.get (i))))
+ return false;
+ }
+ return true;
+ }
+
+ public boolean equals (Object obj)
+ {
+ if (! (obj instanceof CompoundName))
+ return false;
+ return compareTo (obj) == 0;
+ }
+
+ public String get (int posn)
+ {
+ return elts.get (posn);
+ }
+
+ public Enumeration<String> getAll ()
+ {
+ return elts.elements ();
+ }
+
+ public Name getPrefix (int posn)
+ {
+ CompoundName cn = new CompoundName (mySyntax);
+ for (int i = 0; i < posn; ++i)
+ cn.elts.add (elts.get (i));
+ return cn;
+ }
+
+ public Name getSuffix (int posn)
+ {
+ if (posn > elts.size ())
+ throw new ArrayIndexOutOfBoundsException (posn);
+ CompoundName cn = new CompoundName (mySyntax);
+ for (int i = posn; i < elts.size (); ++i)
+ cn.elts.add (elts.get (i));
+ return cn;
+ }
+
+ public int hashCode ()
+ {
+ int h = 0;
+ for (int i = 0; i < elts.size (); ++i)
+ h += canonicalize (elts.get (i)).hashCode ();
+ return h;
+ }
+
+ public boolean isEmpty ()
+ {
+ return elts.isEmpty ();
+ }
+
+ public Object remove (int posn) throws InvalidNameException
+ {
+ return elts.remove (posn);
+ }
+
+ public int size ()
+ {
+ return elts.size ();
+ }
+
+ public boolean startsWith (Name n)
+ {
+ if (! (n instanceof CompoundName))
+ return false;
+ CompoundName cn = (CompoundName) n;
+ if (cn.elts.size () > elts.size ())
+ return false;
+ for (int i = 0; i < cn.elts.size (); ++i)
+ {
+ String f = canonicalize (elts.get (i));
+ if (! f.equals (canonicalize (cn.elts.get (i))))
+ return false;
+ }
+ return true;
+ }
+
+ // If ELEMENT starts with some meta-sequence at OFFSET, then return
+ // the string representing the meta-sequence. Otherwise return
+ // null.
+ private String isSpecial (String element, int offset)
+ {
+ String special = null;
+ if (separator != null && element.startsWith (separator, offset))
+ special = separator;
+ else if (escape != null && element.startsWith (escape, offset))
+ special = escape;
+ else if (beginQuote != null && element.startsWith (beginQuote, offset))
+ special = beginQuote;
+ else if (endQuote != null && element.startsWith (endQuote, offset))
+ special = endQuote;
+ else if (beginQuote2 != null
+ && element.startsWith (beginQuote2, offset))
+ special = beginQuote2;
+ else if (endQuote2 != null && element.startsWith (endQuote2, offset))
+ special = endQuote2;
+
+ return special;
+ }
+
+ public String toString ()
+ {
+ CPStringBuilder result = new CPStringBuilder ();
+ int size = elts.size ();
+ for (int i = 0; i < size; ++i)
+ {
+ // Find the appropriate element. FIXME: not clear what FLAT
+ // means.
+ int offset = (direction == RIGHT_TO_LEFT) ? (size - i - 1) : i;
+ String element = elts.get (offset);
+ if (i > 0
+ || (i == size - 1 && element.equals ("")))
+ result.append (separator);
+
+ int k = 0;
+ while (k < element.length ())
+ {
+ String special = isSpecial (element, k);
+ if (special != null)
+ {
+ result.append (escape);
+ result.append (special);
+ k += special.length ();
+ }
+ else
+ {
+ result.append (element.charAt (k));
+ ++k;
+ }
+ }
+ }
+
+ return result.toString ();
+ }
+
+ // This canonicalizes a String, based on the syntax, for comparison
+ // or other similar purposes.
+ private String canonicalize (String element)
+ {
+ String ret = element;
+
+ if (ignoreCase)
+ ret = ret.toLowerCase ();
+
+ if (trimBlanks)
+ {
+ int first = 0;
+ while (first < ret.length ()
+ && Character.isWhitespace (ret.charAt (first)))
+ ++first;
+
+ int last = ret.length () - 1;
+ while (last >= first
+ && Character.isWhitespace (ret.charAt (last)))
+ --last;
+
+ ret = ret.substring (first, last);
+ }
+
+ return ret;
+ }
+
+ // This initializes all the syntax variables. This seems easier
+ // than re-querying the properties every time. We're allowed to do
+ // this because the spec says that subclasses should consider the
+ // syntax as being read-only.
+ private void initializeSyntax ()
+ {
+ String t = mySyntax.getProperty ("jndi.syntax.direction", "flat");
+ if (t.equals ("right_to_left"))
+ this.direction = RIGHT_TO_LEFT;
+ else if (t.equals ("left_to_right"))
+ this.direction = LEFT_TO_RIGHT;
+ else
+ {
+ // If we don't recognize it, default to flat.
+ this.direction = FLAT;
+ }
+
+ // This is required unless the direction is FLAT. Unfortunately
+ // there is no way to report this error.
+ this.separator = mySyntax.getProperty ("jndi.syntax.separator", "");
+
+ this.ignoreCase
+ = Boolean.valueOf (mySyntax.getProperty ("jndi.syntax.ignorecase",
+ "false")).booleanValue ();
+ this.escape = mySyntax.getProperty ("jndi.syntax.escape", null);
+ this.beginQuote = mySyntax.getProperty ("jndi.syntax.beginquote", null);
+ this.endQuote = mySyntax.getProperty ("jndi.syntax.endquote",
+ this.beginQuote);
+ this.beginQuote2 = mySyntax.getProperty ("jndi.syntax.beginquote2",
+ null);
+ this.endQuote2 = mySyntax.getProperty ("jndi.syntax.endquote2",
+ this.beginQuote2);
+ this.trimBlanks
+ = Boolean.valueOf (mySyntax.getProperty ("jndi.syntax.trimblanks",
+ "false")).booleanValue ();
+ }
+
+ private void readObject(ObjectInputStream s)
+ throws IOException, ClassNotFoundException
+ {
+ mySyntax = (Properties) s.readObject();
+ int count = s.readInt();
+ elts = new Vector<String>(count);
+ for (int i = 0; i < count; i++)
+ elts.addElement((String) s.readObject());
+ }
+
+ private void writeObject(ObjectOutputStream s)
+ throws IOException
+ {
+ s.writeObject(mySyntax);
+ s.writeInt(elts.size());
+ for (int i = 0; i < elts.size(); i++)
+ s.writeObject(elts.elementAt(i));
+ }
+
+ // The spec specifies this but does not document it in any way (it
+ // is a package-private class). It is useless as far as I can tell.
+ // So we ignore it.
+ // protected transient NameImpl impl;
+ protected transient Properties mySyntax;
+
+ // The actual elements.
+ private transient Vector<String> elts;
+
+ // The following are all used for syntax.
+ private transient int direction;
+ private transient String separator;
+ private transient boolean ignoreCase;
+ private transient String escape;
+ private transient String beginQuote;
+ private transient String endQuote;
+ private transient String beginQuote2;
+ private transient String endQuote2;
+ private transient boolean trimBlanks;
+ // We didn't need these for parsing, so they are gone.
+ // private transient String avaSeparator;
+ // private transient String typevalSeparator;
+
+ private static final int RIGHT_TO_LEFT = -1;
+ private static final int LEFT_TO_RIGHT = 1;
+ private static final int FLAT = 0;
+}