You are viewing a plain text version of this content. The canonical link for it is here.
Posted to cvs@cocoon.apache.org by vg...@apache.org on 2003/12/09 22:05:42 UTC
cvs commit: cocoon-2.1/src/java/org/apache/cocoon/xml ParamSaxBuffer.java
vgritsenko 2003/12/09 13:05:42
Added: src/java/org/apache/cocoon/xml ParamSaxBuffer.java
Log:
parameterizable sax buffer
Revision Changes Path
1.1 cocoon-2.1/src/java/org/apache/cocoon/xml/ParamSaxBuffer.java
Index: ParamSaxBuffer.java
===================================================================
/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Apache Cocoon" and "Apache Software Foundation" must not be
used to endorse or promote products derived from this software without
prior written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
Stefano Mazzocchi <st...@apache.org>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.cocoon.xml;
import java.util.Iterator;
import java.util.Map;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
/**
* Modification of the SAX buffer with parameterization capabilities.
*
* Any <code>{name}</code> expression inside of the character events can be
* replaced by the content of another SaxBuffer if it is present in the map
* passed to the {@link toSAX(ContentHandler, Map)} method.
*
* @author <a href="mailto:vgritsenko@apache.org">Vadim Gritsenko</a>
* @version CVS $Id: ParamSaxBuffer.java,v 1.1 2003/12/09 21:05:42 vgritsenko Exp $
*/
public class ParamSaxBuffer extends SaxBuffer {
/**
* Creates empty SaxBuffer
*/
public ParamSaxBuffer() {
}
/**
* Creates copy of another SaxBuffer
*/
public ParamSaxBuffer(SaxBuffer saxBuffer) {
super(saxBuffer);
}
/**
* Parses text and extracts <code>{name}</code> parameters for later
* substitution.
*/
public void characters(char ch[], int start, int length) throws SAXException {
int end = start + length;
for (int i = start; i < end; i++) {
if (ch[i] == '{') {
// Send any collected characters so far
if (i > start) {
addBit(new Characters(ch, start, i - start));
}
// Find closing brace, and construct parameter name
StringBuffer name = new StringBuffer();
int j = i + 1;
for (; j < end; j++) {
if (ch[j] == '}') {
break;
}
name.append(ch[j]);
}
if (j == length) {
throw new SAXException("Unclosed '}'");
}
addBit(new Parameter(name.toString()));
// Continue processing
i = j;
start = j + 1;
continue;
}
}
// Send any tailing characters
if (start < end) {
addBit(new Characters(ch, start, end - start));
}
}
/**
* @param parameters map containing SaxBuffers
*/
public void toSAX(ContentHandler contentHandler, Map parameters) throws SAXException {
for (Iterator i = bits(); i.hasNext();) {
SaxBit saxbit = (SaxBit)i.next();
if (saxbit instanceof Parameter) {
((Parameter)saxbit).send(contentHandler, parameters);
} else {
saxbit.send(contentHandler);
}
}
}
final static class Parameter implements SaxBit {
private final String name;
public Parameter(String name) {
this.name = name;
}
public void send(ContentHandler contentHandler) throws SAXException {
}
public void send(ContentHandler contentHandler, Map parameters) throws SAXException {
SaxBuffer value = (SaxBuffer)parameters.get(name);
if (value != null) {
value.toSAX(contentHandler);
}
}
}
}