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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/awt/datatransfer/MimeType.java | |
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Diffstat (limited to 'libjava/classpath/java/awt/datatransfer/MimeType.java')
-rw-r--r-- | libjava/classpath/java/awt/datatransfer/MimeType.java | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/libjava/classpath/java/awt/datatransfer/MimeType.java b/libjava/classpath/java/awt/datatransfer/MimeType.java new file mode 100644 index 000000000..143e8700b --- /dev/null +++ b/libjava/classpath/java/awt/datatransfer/MimeType.java @@ -0,0 +1,283 @@ +/* MimeType.java -- A helper class for mime handling in DataFlavor + Copyright (C) 2006 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 java.awt.datatransfer; + +import gnu.java.lang.CPStringBuilder; + +import java.io.Externalizable; +import java.io.IOException; +import java.io.ObjectInput; +import java.io.ObjectOutput; +import java.util.HashMap; +import java.util.Iterator; +import java.util.Map; +import java.util.NoSuchElementException; +import java.util.Set; +import java.util.StringTokenizer; + +/** + * A helper class for mime handling in DataFlavor. + * + * A Mauve test for DataFlavor.writeExternal() shows that a non-public + * class java.awt.datatransfer.MimeType gets serialized. This class + * is mainly here for serialization compatibility. Of course, + * now that we have it here, we can just as well implement some + * mime handling facility here. + */ +class MimeType + implements Externalizable +{ + + /** + * The primary type. + */ + private String primaryType; + + /** + * The subtype. + */ + private String subType; + + /** + * Additional parameters to be appended to the mime string. + */ + private HashMap parameters; + + /** + * This is only here for deserialization. + */ + public MimeType() + { + parameters = new HashMap(); + } + + /** + * Creates a new MimeType object. + * + * @param mime the mime type + */ + MimeType(String mime) + throws MimeTypeParseException + { + this(); + parse(mime); + } + + /** + * Adds a mime parameter. + * + * @param param the parameter key + * @param value the parameter value + */ + void addParameter(String param, String value) + { + parameters.put(param, value); + } + + /** + * Removes the parameter with the specified key. + * + * @param param the parameter to remove + */ + void removeParameter(String param) + { + parameters.remove(param); + } + + /** + * Returns the parameter for the <code>key</code>. + * + * @param key the parameter key + * + * @return the parameter for the <code>key</code> + */ + String getParameter(String key) + { + return (String) parameters.get(key); + } + + /** + * Returns the primary type. + * + * @return the primary type + */ + String getPrimaryType() + { + return primaryType; + } + + String getSubType() + { + return subType; + } + + /** + * Returns the base type of this mime type. This is the primary + * type plus the subtype, separated by '/'. + * + * @return the base type of this mime type + */ + String getBaseType() + { + return primaryType + '/' + subType; + } + + /** + * Returns <code>true</code> if this mime type and another mime type + * match. This will be true when their primary types are equal, and their + * subtypes are equal (or when either subtype is * ). + * + * @param other the other mime type + * + * @return <code>true</code> if the mime types match, <code>false</code> + * otherwise + */ + boolean matches(MimeType other) + { + boolean match = false; + if (other != null) + { + match = primaryType.equals(other.primaryType) + && (subType.equals("*") || other.subType.equals("*") + || subType.equals(other.subType)); + } + return match; + } + + /** + * Serializes the mime type. + * + * @param in the input stream to read from + * + * @throws ClassNotFoundException not thrown here + * @throws IOException when something goes wrong on the input stream, + * or when the mime type can't be parsed + */ + public void readExternal(ObjectInput in) + throws ClassNotFoundException, IOException + { + String mime = in.readUTF(); + parameters.clear(); + try + { + parse(mime); + } + catch (MimeTypeParseException ex) + { + IOException ioEx = new IOException(); + ioEx.initCause(ex); + throw ioEx; + } + } + + /** + * Serializes this mime type. + * + * @param out the output stream + * + * @throws IOException when something goes wrong on the output stream + */ + public void writeExternal(ObjectOutput out) + throws IOException + { + out.writeUTF(toString()); + } + + /** + * Creates a string representation of this mime type. + * + * @return a string representation of this mime type + */ + public String toString() + { + CPStringBuilder s = new CPStringBuilder(); + s.append(primaryType); + s.append('/'); + s.append(subType); + if (parameters.size() > 0) + { + Set entries = parameters.entrySet(); + for (Iterator i = entries.iterator(); i.hasNext();) + { + s.append("; "); + Map.Entry entry = (Map.Entry) i.next(); + s.append(entry.getKey()); + s.append('='); + s.append(entry.getValue()); + } + } + return s.toString(); + } + + /** + * Parses the specified mime type string and initializes the fields + * of this object. + * + * @param mime the mime type string + */ + private void parse(String mime) + throws MimeTypeParseException + { + // FIXME: Maybe implement more sophisticated mime string parsing according + // to RFC 2045 and 2046. + StringTokenizer tokenizer = new StringTokenizer(mime); + try + { + primaryType = tokenizer.nextToken("/"); + subType = tokenizer.nextToken("/;"); + } + catch (NoSuchElementException ex) + { + throw new MimeTypeParseException("Expected / separator"); + } + + // Add any parameters. + while (tokenizer.hasMoreTokens()) + { + String keyValuePair = tokenizer.nextToken(";"); + int i = keyValuePair.indexOf('='); + if (i == -1) + throw new MimeTypeParseException("Expected = as parameter separator"); + String key = keyValuePair.substring(0, i).trim(); + String value = keyValuePair.substring(i + 1).trim(); + parameters.put(key, value); + } + } + +} |