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org.apache.cxf.staxutils.CachingXmlEventWriter Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.cxf.staxutils;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Stack;
import javax.xml.namespace.NamespaceContext;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLEventFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.stream.events.XMLEvent;
import org.apache.cxf.common.util.StringUtils;
/**
*
*/
public class CachingXmlEventWriter implements XMLStreamWriter {
protected XMLEventFactory factory;
List events = new ArrayList(1000);
Stack contexts = new Stack();
Stack elNames = new Stack();
QName lastStart;
NSContext curContext = new NSContext(null);
public CachingXmlEventWriter() {
factory = XMLEventFactory.newInstance();
}
protected void addEvent(XMLEvent event) {
events.add(event);
}
public List getEvents() {
return events;
}
public void close() throws XMLStreamException {
//nothing
}
public void flush() throws XMLStreamException {
//nothing
}
public NamespaceContext getNamespaceContext() {
return curContext;
}
public String getPrefix(String ns) throws XMLStreamException {
return curContext.getPrefix(ns);
}
public Object getProperty(String arg0) throws IllegalArgumentException {
//nothing
return null;
}
public void setNamespaceContext(NamespaceContext arg0) throws XMLStreamException {
curContext = new NSContext(arg0);
}
public void writeAttribute(String name, String value) throws XMLStreamException {
addEvent(factory.createAttribute(name, value));
}
public void writeAttribute(String pfx, String uri, String name, String value) throws XMLStreamException {
addEvent(factory.createAttribute(pfx, uri, name, value));
}
public void writeCData(String arg0) throws XMLStreamException {
addEvent(factory.createCData(arg0));
}
public void writeCharacters(String arg0) throws XMLStreamException {
addEvent(factory.createCharacters(arg0));
}
public void writeCharacters(char[] arg0, int arg1, int arg2) throws XMLStreamException {
addEvent(factory.createCharacters(new String(arg0, arg1, arg2)));
}
public void writeComment(String arg0) throws XMLStreamException {
addEvent(factory.createComment(arg0));
}
public void writeDTD(String arg0) throws XMLStreamException {
addEvent(factory.createDTD(arg0));
}
public void writeEndDocument() throws XMLStreamException {
addEvent(factory.createEndDocument());
}
public void writeEntityRef(String arg0) throws XMLStreamException {
addEvent(factory.createEntityReference(arg0, null));
}
public void writeProcessingInstruction(String arg0) throws XMLStreamException {
addEvent(factory.createProcessingInstruction(arg0, null));
}
public void writeProcessingInstruction(String arg0, String arg1) throws XMLStreamException {
addEvent(factory.createProcessingInstruction(arg0, arg1));
}
public void writeStartDocument() throws XMLStreamException {
addEvent(factory.createStartDocument());
}
public void writeStartDocument(String arg0) throws XMLStreamException {
addEvent(factory.createStartDocument(arg0));
}
public void writeStartDocument(String arg0, String arg1) throws XMLStreamException {
addEvent(factory.createStartDocument(arg0, arg1));
}
public void setDefaultNamespace(String ns) throws XMLStreamException {
writeNamespace("", ns);
}
public void writeNamespace(String pfx, String ns) throws XMLStreamException {
curContext.addNs(pfx, ns);
if (StringUtils.isEmpty(pfx)) {
addEvent(factory.createNamespace(ns));
} else {
addEvent(factory.createNamespace(pfx, ns));
}
}
private String creatPrefix() {
int count = 1;
String pfx = "ns" + count;
while (curContext.getNamespaceURI(pfx) != null) {
count++;
pfx = "ns" + count;
}
return pfx;
}
public void writeAttribute(String uri, String name, String value) throws XMLStreamException {
if (!StringUtils.isEmpty(uri)) {
String pfx = this.getPrefix(uri);
if (pfx == null) {
pfx = creatPrefix();
}
addEvent(factory.createAttribute(pfx, uri, name, value));
} else {
addEvent(factory.createAttribute(name, value));
}
}
public void setPrefix(String pfx, String uri) throws XMLStreamException {
curContext.addNs(pfx, uri);
}
public void writeEndElement() throws XMLStreamException {
addEvent(factory.createEndElement(lastStart, Collections.emptyList().iterator()));
curContext = contexts.pop();
lastStart = elNames.pop();
}
public void writeDefaultNamespace(String ns) throws XMLStreamException {
writeNamespace("", ns);
}
public void writeEmptyElement(String name) throws XMLStreamException {
writeStartElement(name);
writeEndElement();
}
public void writeEmptyElement(String name, String ns) throws XMLStreamException {
writeStartElement(name, ns);
writeEndElement();
}
public void writeEmptyElement(String pfx, String name, String ns) throws XMLStreamException {
writeStartElement(pfx, name, ns);
writeEndElement();
}
public void writeStartElement(String name) throws XMLStreamException {
elNames.push(lastStart);
contexts.push(curContext);
curContext = new NSContext(curContext);
lastStart = new QName(name);
addEvent(factory.createStartElement(lastStart,
Collections.EMPTY_SET.iterator(),
Collections.EMPTY_SET.iterator()));
}
public void writeStartElement(String name, String ns) throws XMLStreamException {
elNames.push(lastStart);
contexts.push(curContext);
curContext = new NSContext(curContext);
lastStart = new QName(ns, name);
addEvent(factory.createStartElement(lastStart,
Collections.EMPTY_SET.iterator(),
Collections.EMPTY_SET.iterator()));
}
public void writeStartElement(String pfx, String name, String ns) throws XMLStreamException {
elNames.push(lastStart);
contexts.push(curContext);
curContext = new NSContext(curContext);
lastStart = new QName(ns, name, pfx);
addEvent(factory.createStartElement(lastStart,
Collections.EMPTY_SET.iterator(),
Collections.EMPTY_SET.iterator()));
}
private class NSContext implements NamespaceContext {
NamespaceContext parent;
Map map = new HashMap();
public NSContext(NamespaceContext p) {
parent = p;
}
public void addNs(String pfx, String ns) {
map.put(ns, pfx);
}
public String getNamespaceURI(String prefix) {
for (Map.Entry e : map.entrySet()) {
if (e.getValue().equals(prefix)) {
return e.getKey();
}
}
if (parent != null) {
return parent.getNamespaceURI(prefix);
}
return null;
}
public String getPrefix(String namespaceURI) {
String ret = map.get(namespaceURI);
if (ret == null && parent != null) {
return parent.getPrefix(namespaceURI);
}
return ret;
}
public Iterator getPrefixes(String namespaceURI) {
String pfx = getPrefix(namespaceURI);
return Collections.singleton(pfx).iterator();
}
}
}
