/*
* Copyright 2011, 2012 Odysseus Software GmbH
*
* 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 org.apache.synapse.commons.staxon.core.xml.util;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLEventWriter;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.XMLEvent;
import org.apache.synapse.commons.staxon.core.util.EventWriterDelegate;
/**
* Pretty printing XML event writer.
*/
public class PrettyXMLEventWriter extends EventWriterDelegate {
private final PrettyXMLWhitespaceHandler handler;
/**
* Create instance using default indentation (\t) and line separator (\n).
*
* @param writer parent writer
*/
public PrettyXMLEventWriter(XMLEventWriter writer) {
this(writer, "\t", "\n");
}
/**
* Create instance.
*
* @param writer parent writer
* @param indentation line indentation
* @param newline line separator
*/
public PrettyXMLEventWriter(XMLEventWriter writer, String indentation, String newline) {
super(writer);
this.handler = new PrettyXMLWhitespaceHandler(writer, indentation, newline);
}
@Override
public void setParent(XMLEventWriter parent) {
throw new UnsupportedOperationException();
}
@Override
public void add(XMLEventReader reader) throws XMLStreamException {
while (reader.hasNext()) {
add(reader.nextEvent());
}
}
@Override
public void add(XMLEvent event) throws XMLStreamException {
switch (event.getEventType()) {
case XMLStreamConstants.START_DOCUMENT:
handler.preStartDocument();
super.add(event);
handler.postStartDocument();
break;
case XMLStreamConstants.START_ELEMENT:
handler.preStartElement();
super.add(event);
handler.postStartElement();
break;
case XMLStreamConstants.END_ELEMENT:
handler.preEndElement();
super.add(event);
handler.postEndElement();
break;
case XMLStreamConstants.CHARACTERS:
case XMLStreamConstants.CDATA:
handler.preCharacters();
super.add(event);
handler.postCharacters();
break;
case XMLStreamConstants.COMMENT:
handler.preComment();
super.add(event);
handler.postComment();
break;
case XMLStreamConstants.PROCESSING_INSTRUCTION:
handler.preProcessingInstruction();
super.add(event);
handler.postProcessingInstruction();
break;
default:
super.add(event);
}
}
}