/*
* Copyright 2007 Colin Crist
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package hermes.util;
import java.nio.CharBuffer;
import javax.swing.text.AbstractDocument;
import javax.swing.text.BadLocationException;
import javax.swing.text.Position;
import javax.swing.text.Segment;
import javax.swing.undo.UndoableEdit;
import org.apache.log4j.Logger;
/**
* @author colincrist@hermesjms.com
* @version $Id$
*/
public class MappedStringContent implements AbstractDocument.Content
{
private static final Logger log = Logger.getLogger(MappedStringContent.class);
private CharBuffer chars;
public class MyPosition implements Position
{
private int offset;
MyPosition(int offset)
{
this.offset = offset;
}
public int getOffset()
{
return offset;
}
}
public MappedStringContent(CharBuffer chars)
{
this.chars = chars;
}
public Position createPosition(int offset) throws BadLocationException
{
CheckLocation(offset);
return new MyPosition(offset);
}
public void getChars(int where, int len, Segment txt) throws BadLocationException
{
log.debug("getChars() where=" + where + " len=" + len);
chars.position(where);
char[] rval = new char[len];
chars.get(rval, where, len);
txt.array = rval;
txt.count = len;
txt.offset = 0;
}
private final void CheckLocation(int offset) throws BadLocationException
{
if (offset >= chars.limit())
{
throw new BadLocationException("Max size is " + chars.limit(), offset);
}
}
public String getString(int where, int len) throws BadLocationException
{
CheckLocation(where);
char[] rval = new char[len];
chars.get(rval, where, len);
String string = new String(rval);
log.debug("getString() rval=" + string);
return string;
}
public UndoableEdit insertString(int where, String str) throws BadLocationException
{
return null;
}
public int length()
{
log.debug("length=" + chars.limit());
return chars.limit();
}
public UndoableEdit remove(int where, int nitems) throws BadLocationException
{
return null;
}
}