/*
* 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.axiom.om.impl.common.serializer.push.sax;
import java.io.IOException;
import javax.activation.DataHandler;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import org.apache.axiom.ext.stax.datahandler.DataHandlerProvider;
import org.apache.axiom.om.OMDataSource;
import org.apache.axiom.om.OMNode;
import org.apache.axiom.om.OMSerializable;
import org.apache.axiom.om.impl.common.serializer.push.OutputException;
import org.apache.axiom.om.impl.common.serializer.push.Serializer;
import org.apache.axiom.util.base64.Base64EncodingWriterOutputStream;
import org.apache.axiom.util.namespace.ScopedNamespaceContext;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.ext.LexicalHandler;
public class SAXSerializer extends Serializer {
private final ContentHandler contentHandler;
private final LexicalHandler lexicalHandler;
private final ScopedNamespaceContext nsContext = new ScopedNamespaceContext();
private boolean startDocumentWritten;
private boolean autoStartDocument;
private int depth;
private final SAXHelper helper = new SAXHelper();
public SAXSerializer(OMSerializable root, ContentHandler contentHandler, LexicalHandler lexicalHandler) {
super(root, false, true);
this.contentHandler = contentHandler;
this.lexicalHandler = lexicalHandler;
}
protected boolean isAssociated(String prefix, String namespace) throws OutputException {
return nsContext.getNamespaceURI(prefix).equals(namespace);
}
private void writeStartDocument() throws OutputException {
try {
contentHandler.startDocument();
startDocumentWritten = true;
} catch (SAXException ex) {
throw new SAXOutputException(ex);
}
}
public void writeStartDocument(String version) throws OutputException {
writeStartDocument();
}
public void writeStartDocument(String encoding, String version) throws OutputException {
writeStartDocument();
}
public void writeDTD(String rootName, String publicId, String systemId, String internalSubset) throws OutputException {
if (lexicalHandler != null) {
try {
lexicalHandler.startDTD(rootName, publicId, systemId);
lexicalHandler.endDTD();
} catch (SAXException ex) {
throw new SAXOutputException(ex);
}
}
}
protected void beginStartElement(String prefix, String namespaceURI, String localName) throws OutputException {
if (!startDocumentWritten) {
writeStartDocument();
autoStartDocument = true;
}
helper.beginStartElement(prefix, namespaceURI, localName);
nsContext.startScope();
depth++;
}
protected void addNamespace(String prefix, String namespaceURI) throws OutputException {
nsContext.setPrefix(prefix, namespaceURI);
try {
contentHandler.startPrefixMapping(prefix, namespaceURI);
} catch (SAXException ex) {
throw new SAXOutputException(ex);
}
// TODO: depending on the http://xml.org/sax/features/xmlns-uris feature, we also need to add an attribute
}
protected void addAttribute(String prefix, String namespaceURI, String localName, String type, String value) throws OutputException {
helper.addAttribute(prefix, namespaceURI, localName, type, value);
}
protected void finishStartElement() throws OutputException {
try {
helper.finishStartElement(contentHandler);
} catch (SAXException ex) {
throw new SAXOutputException(ex);
}
}
public void writeEndElement() throws OutputException {
try {
helper.writeEndElement(contentHandler, nsContext);
if (--depth == 0 && autoStartDocument) {
contentHandler.endDocument();
}
} catch (SAXException ex) {
throw new SAXOutputException(ex);
}
}
public void writeText(int type, String data) throws OutputException {
char[] ch = data.toCharArray();
try {
switch (type) {
case OMNode.TEXT_NODE:
contentHandler.characters(ch, 0, ch.length);
break;
case OMNode.CDATA_SECTION_NODE:
if (lexicalHandler != null) {
lexicalHandler.startCDATA();
}
contentHandler.characters(ch, 0, ch.length);
if (lexicalHandler != null) {
lexicalHandler.endCDATA();
}
break;
case OMNode.SPACE_NODE:
contentHandler.ignorableWhitespace(ch, 0, ch.length);
}
} catch (SAXException ex) {
throw new SAXOutputException(ex);
}
}
public void writeComment(String data) throws OutputException {
if (lexicalHandler != null) {
char[] ch = data.toCharArray();
try {
lexicalHandler.comment(ch, 0, ch.length);
} catch (SAXException ex) {
throw new SAXOutputException(ex);
}
}
}
public void writeProcessingInstruction(String target, String data) throws OutputException {
try {
contentHandler.processingInstruction(target, data);
} catch (SAXException ex) {
throw new SAXOutputException(ex);
}
}
public void writeEntityRef(String name) throws OutputException {
try {
contentHandler.skippedEntity(name);
} catch (SAXException ex) {
throw new SAXOutputException(ex);
}
}
public void writeDataHandler(DataHandler dataHandler, String contentID, boolean optimize) throws OutputException {
Base64EncodingWriterOutputStream out = new Base64EncodingWriterOutputStream(new ContentHandlerWriter(contentHandler), 4096, true);
try {
dataHandler.writeTo(out);
out.complete();
} catch (IOException ex) {
Throwable cause = ex.getCause();
SAXException saxException;
if (cause instanceof SAXException) {
saxException = (SAXException)cause;
} else {
saxException = new SAXException(ex);
}
throw new SAXOutputException(saxException);
}
}
public void writeDataHandler(DataHandlerProvider dataHandlerProvider, String contentID,
boolean optimize) throws OutputException {
// TODO
throw new UnsupportedOperationException();
}
protected void serializePushOMDataSource(OMDataSource dataSource) throws OutputException {
try {
XMLStreamWriter writer = new ContentHandlerXMLStreamWriter(helper, contentHandler, lexicalHandler, nsContext);
if (startDocumentWritten) {
dataSource.serialize(writer);
} else {
contentHandler.startDocument();
dataSource.serialize(writer);
contentHandler.endDocument();
}
} catch (SAXException ex) {
throw new SAXOutputException(ex);
} catch (SAXExceptionWrapper ex) {
throw new SAXOutputException((SAXException)ex.getCause());
} catch (XMLStreamException ex) {
throw new SAXOutputException(new SAXException(ex));
}
}
public void writeEndDocument() throws OutputException {
try {
contentHandler.endDocument();
} catch (SAXException ex) {
throw new SAXOutputException(ex);
}
}
}