/*
* Copyright 2001-2004 The Apache Software Foundation.
*
* 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.
*/
/*
* $Id: TransformerHandlerImpl.java,v 1.2.4.1 2005/09/15 06:25:12 pvedula Exp $
*/
package com.sun.org.apache.xalan.internal.xsltc.trax;
import javax.xml.transform.Result;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.sax.TransformerHandler;
import javax.xml.transform.dom.DOMResult;
import com.sun.org.apache.xalan.internal.xsltc.StripFilter;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
import com.sun.org.apache.xalan.internal.xsltc.dom.DOMWSFilter;
import com.sun.org.apache.xalan.internal.xsltc.dom.SAXImpl;
import com.sun.org.apache.xalan.internal.xsltc.dom.XSLTCDTMManager;
import com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet;
import com.sun.org.apache.xml.internal.dtm.DTMWSFilter;
import com.sun.org.apache.xml.internal.serializer.SerializationHandler;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.DTDHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.ext.DeclHandler;
import org.xml.sax.ext.LexicalHandler;
import org.xml.sax.helpers.DefaultHandler;
/**
* Implementation of a JAXP1.1 TransformerHandler
* @author Morten Jorgensen
*/
public class TransformerHandlerImpl implements TransformerHandler, DeclHandler {
private TransformerImpl _transformer;
private AbstractTranslet _translet = null;
private String _systemId;
private SAXImpl _dom = null;
private ContentHandler _handler = null;
private LexicalHandler _lexHandler = null;
private DTDHandler _dtdHandler = null;
private DeclHandler _declHandler = null;
private Result _result = null;
private Locator _locator = null;
private boolean _done = false; // Set in endDocument()
/**
* A flag indicating whether this transformer handler implements the
* identity transform.
*/
private boolean _isIdentity = false;
/**
* Cosntructor - pass in reference to a TransformerImpl object
*/
public TransformerHandlerImpl(TransformerImpl transformer) {
// Save the reference to the transformer
_transformer = transformer;
if (transformer.isIdentity()) {
// Set initial handler to the empty handler
_handler = new DefaultHandler();
_isIdentity = true;
}
else {
// Get a reference to the translet wrapped inside the transformer
_translet = _transformer.getTranslet();
}
}
/**
* Implements javax.xml.transform.sax.TransformerHandler.getSystemId()
* Get the base ID (URI or system ID) from where relative URLs will be
* resolved.
* @return The systemID that was set with setSystemId(String id)
*/
public String getSystemId() {
return _systemId;
}
/**
* Implements javax.xml.transform.sax.TransformerHandler.setSystemId()
* Get the base ID (URI or system ID) from where relative URLs will be
* resolved.
* @param id Base URI for this stylesheet
*/
public void setSystemId(String id) {
_systemId = id;
}
/**
* Implements javax.xml.transform.sax.TransformerHandler.getTransformer()
* Get the Transformer associated with this handler, which is needed in
* order to set parameters and output properties.
* @return The Transformer object
*/
public Transformer getTransformer() {
return _transformer;
}
/**
* Implements javax.xml.transform.sax.TransformerHandler.setResult()
* Enables the user of the TransformerHandler to set the to set the Result
* for the transformation.
* @param result A Result instance, should not be null
* @throws IllegalArgumentException if result is invalid for some reason
*/
public void setResult(Result result) throws IllegalArgumentException {
_result = result;
if (null == result) {
ErrorMsg err = new ErrorMsg(ErrorMsg.ER_RESULT_NULL);
throw new IllegalArgumentException(err.toString()); //"result should not be null");
}
if (_isIdentity) {
try {
// Connect this object with output system directly
SerializationHandler outputHandler =
_transformer.getOutputHandler(result);
_transformer.transferOutputProperties(outputHandler);
_handler = outputHandler;
_lexHandler = outputHandler;
}
catch (TransformerException e) {
_result = null;
}
}
else if (_done) {
// Run the transformation now, if not already done
try {
_transformer.setDOM(_dom);
_transformer.transform(null, _result);
}
catch (TransformerException e) {
// What the hell are we supposed to do with this???
throw new IllegalArgumentException(e.getMessage());
}
}
}
/**
* Implements org.xml.sax.ContentHandler.characters()
* Receive notification of character data.
*/
public void characters(char[] ch, int start, int length)
throws SAXException
{
_handler.characters(ch, start, length);
}
/**
* Implements org.xml.sax.ContentHandler.startDocument()
* Receive notification of the beginning of a document.
*/
public void startDocument() throws SAXException {
// Make sure setResult() was called before the first SAX event
if (_result == null) {
ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_SET_RESULT_ERR);
throw new SAXException(err.toString());
}
if (!_isIdentity) {
boolean hasIdCall = (_translet != null) ? _translet.hasIdCall() : false;
XSLTCDTMManager dtmManager = null;
// Create an internal DOM (not W3C) and get SAX2 input handler
try {
dtmManager =
(XSLTCDTMManager)_transformer.getTransformerFactory()
.getDTMManagerClass()
.newInstance();
} catch (Exception e) {
throw new SAXException(e);
}
DTMWSFilter wsFilter;
if (_translet != null && _translet instanceof StripFilter) {
wsFilter = new DOMWSFilter(_translet);
} else {
wsFilter = null;
}
// Construct the DTM using the SAX events that come through
_dom = (SAXImpl)dtmManager.getDTM(null, false, wsFilter, true,
false, hasIdCall);
_handler = _dom.getBuilder();
_lexHandler = (LexicalHandler) _handler;
_dtdHandler = (DTDHandler) _handler;
_declHandler = (DeclHandler) _handler;
// Set document URI
_dom.setDocumentURI(_systemId);
if (_locator != null) {
_handler.setDocumentLocator(_locator);
}
}
// Proxy call
_handler.startDocument();
}
/**
* Implements org.xml.sax.ContentHandler.endDocument()
* Receive notification of the end of a document.
*/
public void endDocument() throws SAXException {
// Signal to the DOMBuilder that the document is complete
_handler.endDocument();
if (!_isIdentity) {
// Run the transformation now if we have a reference to a Result object
if (_result != null) {
try {
_transformer.setDOM(_dom);
_transformer.transform(null, _result);
}
catch (TransformerException e) {
throw new SAXException(e);
}
}
// Signal that the internal DOM is built (see 'setResult()').
_done = true;
// Set this DOM as the transformer's DOM
_transformer.setDOM(_dom);
}
if (_isIdentity && _result instanceof DOMResult) {
((DOMResult)_result).setNode(_transformer.getTransletOutputHandlerFactory().getNode());
}
}
/**
* Implements org.xml.sax.ContentHandler.startElement()
* Receive notification of the beginning of an element.
*/
public void startElement(String uri, String localName,
String qname, Attributes attributes)
throws SAXException
{
_handler.startElement(uri, localName, qname, attributes);
}
/**
* Implements org.xml.sax.ContentHandler.endElement()
* Receive notification of the end of an element.
*/
public void endElement(String namespaceURI, String localName, String qname)
throws SAXException
{
_handler.endElement(namespaceURI, localName, qname);
}
/**
* Implements org.xml.sax.ContentHandler.processingInstruction()
* Receive notification of a processing instruction.
*/
public void processingInstruction(String target, String data)
throws SAXException
{
_handler.processingInstruction(target, data);
}
/**
* Implements org.xml.sax.ext.LexicalHandler.startCDATA()
*/
public void startCDATA() throws SAXException {
if (_lexHandler != null) {
_lexHandler.startCDATA();
}
}
/**
* Implements org.xml.sax.ext.LexicalHandler.endCDATA()
*/
public void endCDATA() throws SAXException {
if (_lexHandler != null) {
_lexHandler.endCDATA();
}
}
/**
* Implements org.xml.sax.ext.LexicalHandler.comment()
* Receieve notification of a comment
*/
public void comment(char[] ch, int start, int length)
throws SAXException
{
if (_lexHandler != null) {
_lexHandler.comment(ch, start, length);
}
}
/**
* Implements org.xml.sax.ContentHandler.ignorableWhitespace()
* Receive notification of ignorable whitespace in element
* content. Similar to characters(char[], int, int).
*/
public void ignorableWhitespace(char[] ch, int start, int length)
throws SAXException
{
_handler.ignorableWhitespace(ch, start, length);
}
/**
* Implements org.xml.sax.ContentHandler.setDocumentLocator()
* Receive an object for locating the origin of SAX document events.
*/
public void setDocumentLocator(Locator locator) {
_locator = locator;
if (_handler != null) {
_handler.setDocumentLocator(locator);
}
}
/**
* Implements org.xml.sax.ContentHandler.skippedEntity()
* Receive notification of a skipped entity.
*/
public void skippedEntity(String name) throws SAXException {
_handler.skippedEntity(name);
}
/**
* Implements org.xml.sax.ContentHandler.startPrefixMapping()
* Begin the scope of a prefix-URI Namespace mapping.
*/
public void startPrefixMapping(String prefix, String uri)
throws SAXException {
_handler.startPrefixMapping(prefix, uri);
}
/**
* Implements org.xml.sax.ContentHandler.endPrefixMapping()
* End the scope of a prefix-URI Namespace mapping.
*/
public void endPrefixMapping(String prefix) throws SAXException {
_handler.endPrefixMapping(prefix);
}
/**
* Implements org.xml.sax.ext.LexicalHandler.startDTD()
*/
public void startDTD(String name, String publicId, String systemId)
throws SAXException
{
if (_lexHandler != null) {
_lexHandler.startDTD(name, publicId, systemId);
}
}
/**
* Implements org.xml.sax.ext.LexicalHandler.endDTD()
*/
public void endDTD() throws SAXException {
if (_lexHandler != null) {
_lexHandler.endDTD();
}
}
/**
* Implements org.xml.sax.ext.LexicalHandler.startEntity()
*/
public void startEntity(String name) throws SAXException {
if (_lexHandler != null) {
_lexHandler.startEntity(name);
}
}
/**
* Implements org.xml.sax.ext.LexicalHandler.endEntity()
*/
public void endEntity(String name) throws SAXException {
if (_lexHandler != null) {
_lexHandler.endEntity(name);
}
}
/**
* Implements org.xml.sax.DTDHandler.unparsedEntityDecl()
*/
public void unparsedEntityDecl(String name, String publicId,
String systemId, String notationName) throws SAXException
{
if (_dtdHandler != null) {
_dtdHandler.unparsedEntityDecl(name, publicId, systemId,
notationName);
}
}
/**
* Implements org.xml.sax.DTDHandler.notationDecl()
*/
public void notationDecl(String name, String publicId, String systemId)
throws SAXException
{
if (_dtdHandler != null) {
_dtdHandler.notationDecl(name, publicId, systemId);
}
}
/**
* Implements org.xml.sax.ext.DeclHandler.attributeDecl()
*/
public void attributeDecl(String eName, String aName, String type,
String valueDefault, String value) throws SAXException
{
if (_declHandler != null) {
_declHandler.attributeDecl(eName, aName, type, valueDefault, value);
}
}
/**
* Implements org.xml.sax.ext.DeclHandler.elementDecl()
*/
public void elementDecl(String name, String model)
throws SAXException
{
if (_declHandler != null) {
_declHandler.elementDecl(name, model);
}
}
/**
* Implements org.xml.sax.ext.DeclHandler.externalEntityDecl()
*/
public void externalEntityDecl(String name, String publicId, String systemId)
throws SAXException
{
if (_declHandler != null) {
_declHandler.externalEntityDecl(name, publicId, systemId);
}
}
/**
* Implements org.xml.sax.ext.DeclHandler.externalEntityDecl()
*/
public void internalEntityDecl(String name, String value)
throws SAXException
{
if (_declHandler != null) {
_declHandler.internalEntityDecl(name, value);
}
}
/** Implementation of the reset() method
*
*/
public void reset() {
_systemId = null;
_dom = null;
_handler = null;
_lexHandler = null;
_dtdHandler = null;
_declHandler = null;
_result = null;
_locator = null;
}
}
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