Reads a AttributedString object that has been serialised by the SerialUtilities.writeAttributedString(AttributedString, ObjectOutputStream)} method.
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.text.AttributedCharacterIterator;
import java.text.AttributedString;
import java.text.CharacterIterator;
import java.util.HashMap;
import java.util.Map;
/*
* JCommon : a free general purpose class library for the Java(tm) platform
*
*
* (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* IOUtils.java
* ------------
* (C)opyright 2002-2004, by Thomas Morgner and Contributors.
*
* Original Author: Thomas Morgner;
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
* $Id: IOUtils.java,v 1.8 2009/01/22 08:34:58 taqua Exp $
*
* Changes
* -------
* 26-Jan-2003 : Initial version
* 23-Feb-2003 : Documentation
* 25-Feb-2003 : Fixed Checkstyle issues (DG);
* 29-Apr-2003 : Moved to jcommon
* 04-Jan-2004 : Fixed JDK 1.2.2 issues with createRelativeURL;
* added support for query strings within these urls (TM);
*/
public class Main {
/**
* Returns <code>true</code> if a class implements <code>Serializable</code>
* and <code>false</code> otherwise.
*
* @param c the class.
*
* @return A boolean.
*/
public static boolean isSerializable(final Class c) {
/**
final Class[] interfaces = c.getInterfaces();
for (int i = 0; i < interfaces.length; i++) {
if (interfaces[i].equals(Serializable.class)) {
return true;
}
}
Class cc = c.getSuperclass();
if (cc != null) {
return isSerializable(cc);
}
*/
return (Serializable.class.isAssignableFrom(c));
}
/**
* Reads a <code>AttributedString</code> object that has been serialised by
* the {@link SerialUtilities#writeAttributedString(AttributedString,
* ObjectOutputStream)} method.
*
* @param stream the input stream (<code>null</code> not permitted).
*
* @return The attributed string object (possibly <code>null</code>).
*
* @throws IOException if there is an I/O problem.
* @throws ClassNotFoundException if there is a problem loading a class.
*/
public static AttributedString readAttributedString(
ObjectInputStream stream)
throws IOException, ClassNotFoundException {
if (stream == null) {
throw new IllegalArgumentException("Null 'stream' argument.");
}
AttributedString result = null;
final boolean isNull = stream.readBoolean();
if (!isNull) {
// read string and attributes then create result
String plainStr = (String) stream.readObject();
result = new AttributedString(plainStr);
char c = stream.readChar();
int start = 0;
while (c != CharacterIterator.DONE) {
int limit = stream.readInt();
Map atts = (Map) stream.readObject();
result.addAttributes(atts, start, limit);
start = limit;
c = stream.readChar();
}
}
return result;
}
/**
* Serialises an <code>AttributedString</code> object.
*
* @param as the attributed string object (<code>null</code> permitted).
* @param stream the output stream (<code>null</code> not permitted).
*
* @throws IOException if there is an I/O error.
*/
public static void writeAttributedString(AttributedString as,
ObjectOutputStream stream) throws IOException {
if (stream == null) {
throw new IllegalArgumentException("Null 'stream' argument.");
}
if (as != null) {
stream.writeBoolean(false);
AttributedCharacterIterator aci = as.getIterator();
// build a plain string from aci
// then write the string
StringBuffer plainStr = new StringBuffer();
char current = aci.first();
while (current != CharacterIterator.DONE) {
plainStr = plainStr.append(current);
current = aci.next();
}
stream.writeObject(plainStr.toString());
// then write the attributes and limits for each run
current = aci.first();
int begin = aci.getBeginIndex();
while (current != CharacterIterator.DONE) {
// write the current character - when the reader sees that this
// is not CharacterIterator.DONE, it will know to read the
// run limits and attributes
stream.writeChar(current);
// now write the limit, adjusted as if beginIndex is zero
int limit = aci.getRunLimit();
stream.writeInt(limit - begin);
// now write the attribute set
Map atts = new HashMap(aci.getAttributes());
stream.writeObject(atts);
current = aci.setIndex(limit);
}
// write a character that signals to the reader that all runs
// are done...
stream.writeChar(CharacterIterator.DONE);
}
else {
// write a flag that indicates a null
stream.writeBoolean(true);
}
}
}
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