/*
* Copyright 2002-2010 the original author or authors.
*
* 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.springframework.util.xml;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.xml.namespace.NamespaceContext;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLEventFactory;
import javax.xml.stream.XMLEventWriter;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.stream.events.EndElement;
import javax.xml.stream.events.Namespace;
import javax.xml.stream.events.StartElement;
import org.springframework.util.Assert;
/**
* Implementation of the {@link javax.xml.stream.XMLStreamWriter} interface that wraps a {@link XMLEventWriter}.
*
* @author Arjen Poutsma
* @since 3.0.5
* @see StaxUtils#createEventStreamWriter(javax.xml.stream.XMLEventWriter, javax.xml.stream.XMLEventFactory)
*/
class XMLEventStreamWriter implements XMLStreamWriter {
private static final String DEFAULT_ENCODING = "UTF-8";
private final XMLEventWriter eventWriter;
private final XMLEventFactory eventFactory;
private List<EndElement> endElements = new ArrayList<EndElement>();
public XMLEventStreamWriter(XMLEventWriter eventWriter, XMLEventFactory eventFactory) {
Assert.notNull(eventWriter, "'eventWriter' must not be null");
Assert.notNull(eventFactory, "'eventFactory' must not be null");
this.eventWriter = eventWriter;
this.eventFactory = eventFactory;
}
public NamespaceContext getNamespaceContext() {
return eventWriter.getNamespaceContext();
}
public String getPrefix(String uri) throws XMLStreamException {
return eventWriter.getPrefix(uri);
}
public void setPrefix(String prefix, String uri) throws XMLStreamException {
eventWriter.setPrefix(prefix, uri);
}
public void setDefaultNamespace(String uri) throws XMLStreamException {
eventWriter.setDefaultNamespace(uri);
}
public void setNamespaceContext(NamespaceContext context) throws XMLStreamException {
eventWriter.setNamespaceContext(context);
}
public void writeStartDocument() throws XMLStreamException {
eventWriter.add(eventFactory.createStartDocument());
}
public void writeStartDocument(String version) throws XMLStreamException {
eventWriter.add(eventFactory.createStartDocument(DEFAULT_ENCODING, version));
}
public void writeStartDocument(String encoding, String version) throws XMLStreamException {
eventWriter.add(eventFactory.createStartDocument(encoding, version));
}
public void writeStartElement(String localName) throws XMLStreamException {
writeStartElement(eventFactory.createStartElement(new QName(localName), null, null));
}
public void writeStartElement(String namespaceURI, String localName) throws XMLStreamException {
writeStartElement(eventFactory.createStartElement(new QName(namespaceURI, localName), null, null));
}
public void writeStartElement(String prefix, String localName, String namespaceURI) throws XMLStreamException {
writeStartElement(eventFactory.createStartElement(new QName(namespaceURI, localName, prefix), null, null));
}
public void writeEmptyElement(String localName) throws XMLStreamException {
writeStartElement(localName);
writeEndElement();
}
public void writeEmptyElement(String namespaceURI, String localName) throws XMLStreamException {
writeStartElement(namespaceURI, localName);
writeEndElement();
}
public void writeEmptyElement(String prefix, String localName, String namespaceURI) throws XMLStreamException {
writeStartElement(prefix, localName, namespaceURI);
writeEndElement();
}
public void writeEndElement() throws XMLStreamException {
int last = endElements.size() - 1;
EndElement lastEndElement = endElements.get(last);
eventWriter.add(lastEndElement);
endElements.remove(last);
}
public void writeAttribute(String localName, String value) throws XMLStreamException {
eventWriter.add(eventFactory.createAttribute(localName, value));
}
public void writeAttribute(String namespaceURI, String localName, String value) throws XMLStreamException {
eventWriter.add(eventFactory.createAttribute(new QName(namespaceURI, localName), value));
}
public void writeAttribute(String prefix, String namespaceURI, String localName, String value)
throws XMLStreamException {
eventWriter.add(eventFactory.createAttribute(prefix, namespaceURI, localName, value));
}
public void writeNamespace(String prefix, String namespaceURI) throws XMLStreamException {
writeNamespace(eventFactory.createNamespace(prefix, namespaceURI));
}
public void writeDefaultNamespace(String namespaceURI) throws XMLStreamException {
writeNamespace(eventFactory.createNamespace(namespaceURI));
}
public void writeCharacters(String text) throws XMLStreamException {
eventWriter.add(eventFactory.createCharacters(text));
}
public void writeCharacters(char[] text, int start, int len) throws XMLStreamException {
eventWriter.add(eventFactory.createCharacters(new String(text, start, len)));
}
public void writeCData(String data) throws XMLStreamException {
eventWriter.add(eventFactory.createCData(data));
}
public void writeComment(String data) throws XMLStreamException {
eventWriter.add(eventFactory.createComment(data));
}
public void writeProcessingInstruction(String target) throws XMLStreamException {
eventWriter.add(eventFactory.createProcessingInstruction(target, ""));
}
public void writeProcessingInstruction(String target, String data) throws XMLStreamException {
eventWriter.add(eventFactory.createProcessingInstruction(target, data));
}
public void writeDTD(String dtd) throws XMLStreamException {
eventWriter.add(eventFactory.createDTD(dtd));
}
public void writeEntityRef(String name) throws XMLStreamException {
eventWriter.add(eventFactory.createEntityReference(name, null));
}
public void writeEndDocument() throws XMLStreamException {
eventWriter.add(eventFactory.createEndDocument());
}
public Object getProperty(String name) throws IllegalArgumentException {
throw new IllegalArgumentException();
}
public void flush() throws XMLStreamException {
eventWriter.flush();
}
public void close() throws XMLStreamException {
eventWriter.close();
}
private void writeStartElement(StartElement startElement) throws XMLStreamException {
eventWriter.add(startElement);
endElements.add(eventFactory.createEndElement(startElement.getName(), null));
}
private void writeNamespace(Namespace namespace) throws XMLStreamException {
int last = endElements.size() - 1;
EndElement oldEndElement = endElements.get(last);
Iterator oldNamespaces = oldEndElement.getNamespaces();
List<Namespace> newNamespaces = new ArrayList<Namespace>();
while (oldNamespaces.hasNext()) {
Namespace oldNamespace = (Namespace) oldNamespaces.next();
newNamespaces.add(oldNamespace);
}
newNamespaces.add(namespace);
EndElement newEndElement = eventFactory.createEndElement(oldEndElement.getName(), newNamespaces.iterator());
eventWriter.add(namespace);
endElements.set(last, newEndElement);
}
}