Java example source code file (TransformerImpl.java)
The TransformerImpl.java Java example source code/*
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/*
* 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: TransformerImpl.java,v 1.10 2007/06/13 01:57:09 joehw Exp $
*/
package com.sun.org.apache.xalan.internal.xsltc.trax;
import com.sun.org.apache.xalan.internal.XalanConstants;
import com.sun.org.apache.xalan.internal.utils.FactoryImpl;
import com.sun.org.apache.xalan.internal.utils.XMLSecurityManager;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;
import java.net.URI;
import java.net.URL;
import java.net.URLConnection;
import java.net.UnknownServiceException;
import java.util.Enumeration;
import java.util.Properties;
import java.util.StringTokenizer;
import java.util.Vector;
import java.lang.reflect.Constructor;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLStreamReader;
import javax.xml.transform.ErrorListener;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.URIResolver;
import javax.xml.transform.dom.DOMResult;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stax.StAXResult;
import javax.xml.transform.stax.StAXSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import javax.xml.XMLConstants;
import com.sun.org.apache.xml.internal.utils.SystemIDResolver;
import com.sun.org.apache.xalan.internal.xsltc.DOM;
import com.sun.org.apache.xalan.internal.xsltc.DOMCache;
import com.sun.org.apache.xalan.internal.xsltc.DOMEnhancedForDTM;
import com.sun.org.apache.xalan.internal.xsltc.StripFilter;
import com.sun.org.apache.xalan.internal.xsltc.Translet;
import com.sun.org.apache.xalan.internal.xsltc.TransletException;
import com.sun.org.apache.xml.internal.serializer.OutputPropertiesFactory;
import com.sun.org.apache.xml.internal.serializer.SerializationHandler;
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.xalan.internal.xsltc.runtime.Hashtable;
import com.sun.org.apache.xalan.internal.xsltc.runtime.output.TransletOutputHandlerFactory;
import com.sun.org.apache.xml.internal.dtm.DTMWSFilter;
import com.sun.org.apache.xml.internal.utils.XMLReaderManager;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.ext.LexicalHandler;
/**
* @author Morten Jorgensen
* @author G. Todd Miller
* @author Santiago Pericas-Geertsen
*/
public final class TransformerImpl extends Transformer
implements DOMCache, ErrorListener
{
private final static String LEXICAL_HANDLER_PROPERTY =
"http://xml.org/sax/properties/lexical-handler";
private static final String NAMESPACE_FEATURE =
"http://xml.org/sax/features/namespaces";
/**
* Namespace prefixes feature for {@link XMLReader}.
*/
private static final String NAMESPACE_PREFIXES_FEATURE =
"http://xml.org/sax/features/namespace-prefixes";
/**
* A reference to the translet or null if the identity transform.
*/
private AbstractTranslet _translet = null;
/**
* The output method of this transformation.
*/
private String _method = null;
/**
* The output encoding of this transformation.
*/
private String _encoding = null;
/**
* The systemId set in input source.
*/
private String _sourceSystemId = null;
/**
* An error listener for runtime errors.
*/
private ErrorListener _errorListener = this;
/**
* A reference to a URI resolver for calls to document().
*/
private URIResolver _uriResolver = null;
/**
* Output properties of this transformer instance.
*/
private Properties _properties, _propertiesClone;
/**
* A reference to an output handler factory.
*/
private TransletOutputHandlerFactory _tohFactory = null;
/**
* A reference to a internal DOM representation of the input.
*/
private DOM _dom = null;
/**
* Number of indent spaces to add when indentation is on.
*/
private int _indentNumber;
/**
* A reference to the transformer factory that this templates
* object belongs to.
*/
private TransformerFactoryImpl _tfactory = null;
/**
* A reference to the output stream, if we create one in our code.
*/
private OutputStream _ostream = null;
/**
* A reference to the XSLTCDTMManager which is used to build the DOM/DTM
* for this transformer.
*/
private XSLTCDTMManager _dtmManager = null;
/**
* A reference to an object that creates and caches XMLReader objects.
*/
private XMLReaderManager _readerManager;
/**
* A flag indicating whether we use incremental building of the DTM.
*/
//private boolean _isIncremental = false;
/**
* A flag indicating whether this transformer implements the identity
* transform.
*/
private boolean _isIdentity = false;
/**
* State of the secure processing feature.
*/
private boolean _isSecureProcessing = false;
/**
* Indicates whether implementation parts should use
* service loader (or similar).
* Note the default value (false) is the safe option..
*/
private boolean _useServicesMechanism;
/**
* protocols allowed for external references set by the stylesheet processing instruction, Import and Include element.
*/
private String _accessExternalStylesheet = XalanConstants.EXTERNAL_ACCESS_DEFAULT;
/**
* protocols allowed for external DTD references in source file and/or stylesheet.
*/
private String _accessExternalDTD = XalanConstants.EXTERNAL_ACCESS_DEFAULT;
private XMLSecurityManager _securityManager;
/**
* A hashtable to store parameters for the identity transform. These
* are not needed during the transformation, but we must keep track of
* them to be fully complaint with the JAXP API.
*/
private Hashtable _parameters = null;
/**
* This class wraps an ErrorListener into a MessageHandler in order to
* capture messages reported via xsl:message.
*/
static class MessageHandler
extends com.sun.org.apache.xalan.internal.xsltc.runtime.MessageHandler
{
private ErrorListener _errorListener;
public MessageHandler(ErrorListener errorListener) {
_errorListener = errorListener;
}
@Override
public void displayMessage(String msg) {
if(_errorListener == null) {
System.err.println(msg);
}
else {
try {
_errorListener.warning(new TransformerException(msg));
}
catch (TransformerException e) {
// ignored
}
}
}
}
protected TransformerImpl(Properties outputProperties, int indentNumber,
TransformerFactoryImpl tfactory)
{
this(null, outputProperties, indentNumber, tfactory);
_isIdentity = true;
// _properties.put(OutputKeys.METHOD, "xml");
}
protected TransformerImpl(Translet translet, Properties outputProperties,
int indentNumber, TransformerFactoryImpl tfactory)
{
_translet = (AbstractTranslet) translet;
_properties = createOutputProperties(outputProperties);
_propertiesClone = (Properties) _properties.clone();
_indentNumber = indentNumber;
_tfactory = tfactory;
_useServicesMechanism = _tfactory.useServicesMechnism();
_accessExternalStylesheet = (String)_tfactory.getAttribute(XMLConstants.ACCESS_EXTERNAL_STYLESHEET);
_accessExternalDTD = (String)_tfactory.getAttribute(XMLConstants.ACCESS_EXTERNAL_DTD);
_securityManager = (XMLSecurityManager)_tfactory.getAttribute(XalanConstants.SECURITY_MANAGER);
_readerManager = XMLReaderManager.getInstance(_useServicesMechanism);
_readerManager.setProperty(XMLConstants.ACCESS_EXTERNAL_DTD, _accessExternalDTD);
_readerManager.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, _isSecureProcessing);
_readerManager.setProperty(XalanConstants.SECURITY_MANAGER, _securityManager);
//_isIncremental = tfactory._incremental;
}
/**
* Return the state of the secure processing feature.
*/
public boolean isSecureProcessing() {
return _isSecureProcessing;
}
/**
* Set the state of the secure processing feature.
*/
public void setSecureProcessing(boolean flag) {
_isSecureProcessing = flag;
_readerManager.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, _isSecureProcessing);
}
/**
* Return the state of the services mechanism feature.
*/
public boolean useServicesMechnism() {
return _useServicesMechanism;
}
/**
* Set the state of the services mechanism feature.
*/
public void setServicesMechnism(boolean flag) {
_useServicesMechanism = flag;
}
/**
* Returns the translet wrapped inside this Transformer or
* null if this is the identity transform.
*/
protected AbstractTranslet getTranslet() {
return _translet;
}
public boolean isIdentity() {
return _isIdentity;
}
/**
* Implements JAXP's Transformer.transform()
*
* @param source Contains the input XML document
* @param result Will contain the output from the transformation
* @throws TransformerException
*/
@Override
public void transform(Source source, Result result)
throws TransformerException
{
if (!_isIdentity) {
if (_translet == null) {
ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_NO_TRANSLET_ERR);
throw new TransformerException(err.toString());
}
// Pass output properties to the translet
transferOutputProperties(_translet);
}
final SerializationHandler toHandler = getOutputHandler(result);
if (toHandler == null) {
ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_NO_HANDLER_ERR);
throw new TransformerException(err.toString());
}
if (_uriResolver != null && !_isIdentity) {
_translet.setDOMCache(this);
}
// Pass output properties to handler if identity
if (_isIdentity) {
transferOutputProperties(toHandler);
}
transform(source, toHandler, _encoding);
try{
if (result instanceof DOMResult) {
((DOMResult)result).setNode(_tohFactory.getNode());
} else if (result instanceof StAXResult) {
if (((StAXResult) result).getXMLEventWriter() != null)
{
(_tohFactory.getXMLEventWriter()).flush();
}
else if (((StAXResult) result).getXMLStreamWriter() != null) {
(_tohFactory.getXMLStreamWriter()).flush();
//result = new StAXResult(_tohFactory.getXMLStreamWriter());
}
}
} catch (Exception e) {
System.out.println("Result writing error");
}
}
/**
* Create an output handler for the transformation output based on
* the type and contents of the TrAX Result object passed to the
* transform() method.
*/
public SerializationHandler getOutputHandler(Result result)
throws TransformerException
{
// Get output method using get() to ignore defaults
_method = (String) _properties.get(OutputKeys.METHOD);
// Get encoding using getProperty() to use defaults
_encoding = (String) _properties.getProperty(OutputKeys.ENCODING);
_tohFactory = TransletOutputHandlerFactory.newInstance(_useServicesMechanism);
_tohFactory.setEncoding(_encoding);
if (_method != null) {
_tohFactory.setOutputMethod(_method);
}
// Set indentation number in the factory
if (_indentNumber >= 0) {
_tohFactory.setIndentNumber(_indentNumber);
}
// Return the content handler for this Result object
try {
// Result object could be SAXResult, DOMResult, or StreamResult
if (result instanceof SAXResult) {
final SAXResult target = (SAXResult)result;
final ContentHandler handler = target.getHandler();
_tohFactory.setHandler(handler);
/**
* Fix for bug 24414
* If the lexicalHandler is set then we need to get that
* for obtaining the lexical information
*/
LexicalHandler lexicalHandler = target.getLexicalHandler();
if (lexicalHandler != null ) {
_tohFactory.setLexicalHandler(lexicalHandler);
}
_tohFactory.setOutputType(TransletOutputHandlerFactory.SAX);
return _tohFactory.getSerializationHandler();
}
else if (result instanceof StAXResult) {
if (((StAXResult) result).getXMLEventWriter() != null)
_tohFactory.setXMLEventWriter(((StAXResult) result).getXMLEventWriter());
else if (((StAXResult) result).getXMLStreamWriter() != null)
_tohFactory.setXMLStreamWriter(((StAXResult) result).getXMLStreamWriter());
_tohFactory.setOutputType(TransletOutputHandlerFactory.STAX);
return _tohFactory.getSerializationHandler();
}
else if (result instanceof DOMResult) {
_tohFactory.setNode(((DOMResult) result).getNode());
_tohFactory.setNextSibling(((DOMResult) result).getNextSibling());
_tohFactory.setOutputType(TransletOutputHandlerFactory.DOM);
return _tohFactory.getSerializationHandler();
}
else if (result instanceof StreamResult) {
// Get StreamResult
final StreamResult target = (StreamResult) result;
// StreamResult may have been created with a java.io.File,
// java.io.Writer, java.io.OutputStream or just a String
// systemId.
_tohFactory.setOutputType(TransletOutputHandlerFactory.STREAM);
// try to get a Writer from Result object
final Writer writer = target.getWriter();
if (writer != null) {
_tohFactory.setWriter(writer);
return _tohFactory.getSerializationHandler();
}
// or try to get an OutputStream from Result object
final OutputStream ostream = target.getOutputStream();
if (ostream != null) {
_tohFactory.setOutputStream(ostream);
return _tohFactory.getSerializationHandler();
}
// or try to get just a systemId string from Result object
String systemId = result.getSystemId();
if (systemId == null) {
ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_NO_RESULT_ERR);
throw new TransformerException(err.toString());
}
// System Id may be in one of several forms, (1) a uri
// that starts with 'file:', (2) uri that starts with 'http:'
// or (3) just a filename on the local system.
URL url;
if (systemId.startsWith("file:")) {
// if StreamResult(File) or setSystemID(File) was used,
// the systemId will be URI encoded as a result of File.toURI(),
// it must be decoded for use by URL
try{
URI uri = new URI(systemId) ;
systemId = "file:";
String host = uri.getHost(); // decoded String
String path = uri.getPath(); //decoded String
if (path == null) {
path = "";
}
// if host (URI authority) then file:// + host + path
// else just path (may be absolute or relative)
if (host != null) {
systemId += "//" + host + path;
} else {
systemId += "//" + path;
}
}
catch (Exception exception) {
// URI exception which means nothing can be done so OK to ignore
}
url = new URL(systemId);
_ostream = new FileOutputStream(url.getFile());
_tohFactory.setOutputStream(_ostream);
return _tohFactory.getSerializationHandler();
}
else if (systemId.startsWith("http:")) {
url = new URL(systemId);
final URLConnection connection = url.openConnection();
_tohFactory.setOutputStream(_ostream = connection.getOutputStream());
return _tohFactory.getSerializationHandler();
}
else {
// system id is just a filename
_tohFactory.setOutputStream(
_ostream = new FileOutputStream(new File(systemId)));
return _tohFactory.getSerializationHandler();
}
}
}
// If we cannot write to the location specified by the SystemId
catch (UnknownServiceException e) {
throw new TransformerException(e);
}
catch (ParserConfigurationException e) {
throw new TransformerException(e);
}
// If we cannot create the file specified by the SystemId
catch (IOException e) {
throw new TransformerException(e);
}
return null;
}
/**
* Set the internal DOM that will be used for the next transformation
*/
protected void setDOM(DOM dom) {
_dom = dom;
}
/**
* Builds an internal DOM from a TrAX Source object
*/
private DOM getDOM(Source source) throws TransformerException {
try {
DOM dom;
if (source != null) {
DTMWSFilter wsfilter;
if (_translet != null && _translet instanceof StripFilter) {
wsfilter = new DOMWSFilter(_translet);
} else {
wsfilter = null;
}
boolean hasIdCall = (_translet != null) ? _translet.hasIdCall()
: false;
if (_dtmManager == null) {
_dtmManager =
_tfactory.createNewDTMManagerInstance();
_dtmManager.setServicesMechnism(_useServicesMechanism);
}
dom = (DOM)_dtmManager.getDTM(source, false, wsfilter, true,
false, false, 0, hasIdCall);
} else if (_dom != null) {
dom = _dom;
_dom = null; // use only once, so reset to 'null'
} else {
return null;
}
if (!_isIdentity) {
// Give the translet the opportunity to make a prepass of
// the document, in case it can extract useful information early
_translet.prepassDocument(dom);
}
return dom;
}
catch (Exception e) {
if (_errorListener != null) {
postErrorToListener(e.getMessage());
}
throw new TransformerException(e);
}
}
/**
* Returns the {@link com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl}
* object that create this <code>Transformer.
*/
protected TransformerFactoryImpl getTransformerFactory() {
return _tfactory;
}
/**
* Returns the {@link com.sun.org.apache.xalan.internal.xsltc.runtime.output.TransletOutputHandlerFactory}
* object that create the <code>TransletOutputHandler.
*/
protected TransletOutputHandlerFactory getTransletOutputHandlerFactory() {
return _tohFactory;
}
private void transformIdentity(Source source, SerializationHandler handler)
throws Exception
{
// Get systemId from source
if (source != null) {
_sourceSystemId = source.getSystemId();
}
if (source instanceof StreamSource) {
final StreamSource stream = (StreamSource) source;
final InputStream streamInput = stream.getInputStream();
final Reader streamReader = stream.getReader();
final XMLReader reader = _readerManager.getXMLReader();
try {
// Hook up reader and output handler
try {
reader.setProperty(LEXICAL_HANDLER_PROPERTY, handler);
reader.setFeature(NAMESPACE_PREFIXES_FEATURE, true);
} catch (SAXException e) {
// Falls through
}
reader.setContentHandler(handler);
// Create input source from source
InputSource input;
if (streamInput != null) {
input = new InputSource(streamInput);
input.setSystemId(_sourceSystemId);
}
else if (streamReader != null) {
input = new InputSource(streamReader);
input.setSystemId(_sourceSystemId);
}
else if (_sourceSystemId != null) {
input = new InputSource(_sourceSystemId);
}
else {
ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_NO_SOURCE_ERR);
throw new TransformerException(err.toString());
}
// Start pushing SAX events
reader.parse(input);
} finally {
_readerManager.releaseXMLReader(reader);
}
} else if (source instanceof SAXSource) {
final SAXSource sax = (SAXSource) source;
XMLReader reader = sax.getXMLReader();
final InputSource input = sax.getInputSource();
boolean userReader = true;
try {
// Create a reader if not set by user
if (reader == null) {
reader = _readerManager.getXMLReader();
userReader = false;
}
// Hook up reader and output handler
try {
reader.setProperty(LEXICAL_HANDLER_PROPERTY, handler);
reader.setFeature(NAMESPACE_PREFIXES_FEATURE, true);
} catch (SAXException e) {
// Falls through
}
reader.setContentHandler(handler);
// Start pushing SAX events
reader.parse(input);
} finally {
if (!userReader) {
_readerManager.releaseXMLReader(reader);
}
}
} else if (source instanceof StAXSource) {
final StAXSource staxSource = (StAXSource)source;
StAXEvent2SAX staxevent2sax;
StAXStream2SAX staxStream2SAX;
if (staxSource.getXMLEventReader() != null) {
final XMLEventReader xmlEventReader = staxSource.getXMLEventReader();
staxevent2sax = new StAXEvent2SAX(xmlEventReader);
staxevent2sax.setContentHandler(handler);
staxevent2sax.parse();
handler.flushPending();
} else if (staxSource.getXMLStreamReader() != null) {
final XMLStreamReader xmlStreamReader = staxSource.getXMLStreamReader();
staxStream2SAX = new StAXStream2SAX(xmlStreamReader);
staxStream2SAX.setContentHandler(handler);
staxStream2SAX.parse();
handler.flushPending();
}
} else if (source instanceof DOMSource) {
final DOMSource domsrc = (DOMSource) source;
new DOM2TO(domsrc.getNode(), handler).parse();
} else if (source instanceof XSLTCSource) {
final DOM dom = ((XSLTCSource) source).getDOM(null, _translet);
((SAXImpl)dom).copy(handler);
} else {
ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_NO_SOURCE_ERR);
throw new TransformerException(err.toString());
}
}
/**
* Internal transformation method - uses the internal APIs of XSLTC
*/
private void transform(Source source, SerializationHandler handler,
String encoding) throws TransformerException
{
try {
/*
* According to JAXP1.2, new SAXSource()/StreamSource()
* should create an empty input tree, with a default root node.
* new DOMSource()creates an empty document using DocumentBuilder.
* newDocument(); Use DocumentBuilder.newDocument() for all 3
* situations, since there is no clear spec. how to create
* an empty tree when both SAXSource() and StreamSource() are used.
*/
if ((source instanceof StreamSource && source.getSystemId()==null
&& ((StreamSource)source).getInputStream()==null &&
((StreamSource)source).getReader()==null)||
(source instanceof SAXSource &&
((SAXSource)source).getInputSource()==null &&
((SAXSource)source).getXMLReader()==null )||
(source instanceof DOMSource &&
((DOMSource)source).getNode()==null)){
DocumentBuilderFactory builderF = FactoryImpl.getDOMFactory(_useServicesMechanism);
DocumentBuilder builder = builderF.newDocumentBuilder();
String systemID = source.getSystemId();
source = new DOMSource(builder.newDocument());
// Copy system ID from original, empty Source to new
if (systemID != null) {
source.setSystemId(systemID);
}
}
if (_isIdentity) {
transformIdentity(source, handler);
} else {
_translet.transform(getDOM(source), handler);
}
} catch (TransletException e) {
if (_errorListener != null) postErrorToListener(e.getMessage());
throw new TransformerException(e);
} catch (RuntimeException e) {
if (_errorListener != null) postErrorToListener(e.getMessage());
throw new TransformerException(e);
} catch (Exception e) {
if (_errorListener != null) postErrorToListener(e.getMessage());
throw new TransformerException(e);
} finally {
_dtmManager = null;
}
// If we create an output stream for the Result, we need to close it after the transformation.
if (_ostream != null) {
try {
_ostream.close();
}
catch (IOException e) {}
_ostream = null;
}
}
/**
* Implements JAXP's Transformer.getErrorListener()
* Get the error event handler in effect for the transformation.
*
* @return The error event handler currently in effect
*/
@Override
public ErrorListener getErrorListener() {
return _errorListener;
}
/**
* Implements JAXP's Transformer.setErrorListener()
* Set the error event listener in effect for the transformation.
* Register a message handler in the translet in order to forward
* xsl:messages to error listener.
*
* @param listener The error event listener to use
* @throws IllegalArgumentException
*/
@Override
public void setErrorListener(ErrorListener listener)
throws IllegalArgumentException {
if (listener == null) {
ErrorMsg err = new ErrorMsg(ErrorMsg.ERROR_LISTENER_NULL_ERR,
"Transformer");
throw new IllegalArgumentException(err.toString());
}
_errorListener = listener;
// Register a message handler to report xsl:messages
if (_translet != null)
_translet.setMessageHandler(new MessageHandler(_errorListener));
}
/**
* Inform TrAX error listener of an error
*/
private void postErrorToListener(String message) {
try {
_errorListener.error(new TransformerException(message));
}
catch (TransformerException e) {
// ignored - transformation cannot be continued
}
}
/**
* Inform TrAX error listener of a warning
*/
private void postWarningToListener(String message) {
try {
_errorListener.warning(new TransformerException(message));
}
catch (TransformerException e) {
// ignored - transformation cannot be continued
}
}
/**
* The translet stores all CDATA sections set in the <xsl:output> element
* in a Hashtable. This method will re-construct the whitespace separated
* list of elements given in the <xsl:output> element.
*/
private String makeCDATAString(Hashtable cdata) {
// Return a 'null' string if no CDATA section elements were specified
if (cdata == null) return null;
final StringBuilder result = new StringBuilder();
// Get an enumeration of all the elements in the hashtable
Enumeration elements = cdata.keys();
if (elements.hasMoreElements()) {
result.append((String)elements.nextElement());
while (elements.hasMoreElements()) {
String element = (String)elements.nextElement();
result.append(' ');
result.append(element);
}
}
return(result.toString());
}
/**
* Implements JAXP's Transformer.getOutputProperties().
* Returns a copy of the output properties for the transformation. This is
* a set of layered properties. The first layer contains properties set by
* calls to setOutputProperty() and setOutputProperties() on this class,
* and the output settings defined in the stylesheet's <xsl:output>
* element makes up the second level, while the default XSLT output
* settings are returned on the third level.
*
* @return Properties in effect for this Transformer
*/
@Override
public Properties getOutputProperties() {
return (Properties) _properties.clone();
}
/**
* Implements JAXP's Transformer.getOutputProperty().
* Get an output property that is in effect for the transformation. The
* property specified may be a property that was set with setOutputProperty,
* or it may be a property specified in the stylesheet.
*
* @param name A non-null string that contains the name of the property
* @throws IllegalArgumentException if the property name is not known
*/
@Override
public String getOutputProperty(String name)
throws IllegalArgumentException
{
if (!validOutputProperty(name)) {
ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_UNKNOWN_PROP_ERR, name);
throw new IllegalArgumentException(err.toString());
}
return _properties.getProperty(name);
}
/**
* Implements JAXP's Transformer.setOutputProperties().
* Set the output properties for the transformation. These properties
* will override properties set in the Templates with xsl:output.
* Unrecognised properties will be quitely ignored.
*
* @param properties The properties to use for the Transformer
* @throws IllegalArgumentException Never, errors are ignored
*/
@Override
public void setOutputProperties(Properties properties)
throws IllegalArgumentException
{
if (properties != null) {
final Enumeration names = properties.propertyNames();
while (names.hasMoreElements()) {
final String name = (String) names.nextElement();
// Ignore lower layer properties
if (isDefaultProperty(name, properties)) continue;
if (validOutputProperty(name)) {
_properties.setProperty(name, properties.getProperty(name));
}
else {
ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_UNKNOWN_PROP_ERR, name);
throw new IllegalArgumentException(err.toString());
}
}
}
else {
_properties = _propertiesClone;
}
}
/**
* Implements JAXP's Transformer.setOutputProperty().
* Get an output property that is in effect for the transformation. The
* property specified may be a property that was set with
* setOutputProperty(), or it may be a property specified in the stylesheet.
*
* @param name The name of the property to set
* @param value The value to assign to the property
* @throws IllegalArgumentException Never, errors are ignored
*/
@Override
public void setOutputProperty(String name, String value)
throws IllegalArgumentException
{
if (!validOutputProperty(name)) {
ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_UNKNOWN_PROP_ERR, name);
throw new IllegalArgumentException(err.toString());
}
_properties.setProperty(name, value);
}
/**
* Internal method to pass any properties to the translet prior to
* initiating the transformation
*/
private void transferOutputProperties(AbstractTranslet translet)
{
// Return right now if no properties are set
if (_properties == null) return;
// Get a list of all the defined properties
Enumeration names = _properties.propertyNames();
while (names.hasMoreElements()) {
// Note the use of get() instead of getProperty()
String name = (String) names.nextElement();
String value = (String) _properties.get(name);
// Ignore default properties
if (value == null) continue;
// Pass property value to translet - override previous setting
if (name.equals(OutputKeys.ENCODING)) {
translet._encoding = value;
}
else if (name.equals(OutputKeys.METHOD)) {
translet._method = value;
}
else if (name.equals(OutputKeys.DOCTYPE_PUBLIC)) {
translet._doctypePublic = value;
}
else if (name.equals(OutputKeys.DOCTYPE_SYSTEM)) {
translet._doctypeSystem = value;
}
else if (name.equals(OutputKeys.MEDIA_TYPE)) {
translet._mediaType = value;
}
else if (name.equals(OutputKeys.STANDALONE)) {
translet._standalone = value;
}
else if (name.equals(OutputKeys.VERSION)) {
translet._version = value;
}
else if (name.equals(OutputKeys.OMIT_XML_DECLARATION)) {
translet._omitHeader =
(value != null && value.toLowerCase().equals("yes"));
}
else if (name.equals(OutputKeys.INDENT)) {
translet._indent =
(value != null && value.toLowerCase().equals("yes"));
}
else if (name.equals(OutputPropertiesFactory.S_BUILTIN_OLD_EXTENSIONS_UNIVERSAL +"indent-amount")) {
if (value != null) {
translet._indentamount = Integer.parseInt(value);
}
}
else if (name.equals(OutputPropertiesFactory.S_BUILTIN_EXTENSIONS_UNIVERSAL +"indent-amount")) {
if (value != null) {
translet._indentamount = Integer.parseInt(value);
}
}
else if (name.equals(OutputKeys.CDATA_SECTION_ELEMENTS)) {
if (value != null) {
translet._cdata = null; // clear previous setting
StringTokenizer e = new StringTokenizer(value);
while (e.hasMoreTokens()) {
translet.addCdataElement(e.nextToken());
}
}
}
else if (name.equals(OutputPropertiesFactory.ORACLE_IS_STANDALONE)) {
if (value != null && value.equals("yes")) {
translet._isStandalone = true;
}
}
}
}
/**
* This method is used to pass any properties to the output handler
* when running the identity transform.
*/
public void transferOutputProperties(SerializationHandler handler)
{
// Return right now if no properties are set
if (_properties == null) return;
String doctypePublic = null;
String doctypeSystem = null;
// Get a list of all the defined properties
Enumeration names = _properties.propertyNames();
while (names.hasMoreElements()) {
// Note the use of get() instead of getProperty()
String name = (String) names.nextElement();
String value = (String) _properties.get(name);
// Ignore default properties
if (value == null) continue;
// Pass property value to translet - override previous setting
if (name.equals(OutputKeys.DOCTYPE_PUBLIC)) {
doctypePublic = value;
}
else if (name.equals(OutputKeys.DOCTYPE_SYSTEM)) {
doctypeSystem = value;
}
else if (name.equals(OutputKeys.MEDIA_TYPE)) {
handler.setMediaType(value);
}
else if (name.equals(OutputKeys.STANDALONE)) {
handler.setStandalone(value);
}
else if (name.equals(OutputKeys.VERSION)) {
handler.setVersion(value);
}
else if (name.equals(OutputKeys.OMIT_XML_DECLARATION)) {
handler.setOmitXMLDeclaration(
value != null && value.toLowerCase().equals("yes"));
}
else if (name.equals(OutputKeys.INDENT)) {
handler.setIndent(
value != null && value.toLowerCase().equals("yes"));
}
else if (name.equals(OutputPropertiesFactory.S_BUILTIN_OLD_EXTENSIONS_UNIVERSAL +"indent-amount")) {
if (value != null) {
handler.setIndentAmount(Integer.parseInt(value));
}
}
else if (name.equals(OutputPropertiesFactory.S_BUILTIN_EXTENSIONS_UNIVERSAL +"indent-amount")) {
if (value != null) {
handler.setIndentAmount(Integer.parseInt(value));
}
}
else if (name.equals(OutputPropertiesFactory.ORACLE_IS_STANDALONE)) {
if (value != null && value.equals("yes")) {
handler.setIsStandalone(true);
}
}
else if (name.equals(OutputKeys.CDATA_SECTION_ELEMENTS)) {
if (value != null) {
StringTokenizer e = new StringTokenizer(value);
Vector uriAndLocalNames = null;
while (e.hasMoreTokens()) {
final String token = e.nextToken();
// look for the last colon, as the String may be
// something like "http://abc.com:local"
int lastcolon = token.lastIndexOf(':');
String uri;
String localName;
if (lastcolon > 0) {
uri = token.substring(0, lastcolon);
localName = token.substring(lastcolon+1);
} else {
// no colon at all, lets hope this is the
// local name itself then
uri = null;
localName = token;
}
if (uriAndLocalNames == null) {
uriAndLocalNames = new Vector();
}
// add the uri/localName as a pair, in that order
uriAndLocalNames.addElement(uri);
uriAndLocalNames.addElement(localName);
}
handler.setCdataSectionElements(uriAndLocalNames);
}
}
}
// Call setDoctype() if needed
if (doctypePublic != null || doctypeSystem != null) {
handler.setDoctype(doctypeSystem, doctypePublic);
}
}
/**
* Internal method to create the initial set of properties. There
* are two layers of properties: the default layer and the base layer.
* The latter contains properties defined in the stylesheet or by
* the user using this API.
*/
private Properties createOutputProperties(Properties outputProperties) {
final Properties defaults = new Properties();
setDefaults(defaults, "xml");
// Copy propeties set in stylesheet to base
final Properties base = new Properties(defaults);
if (outputProperties != null) {
final Enumeration names = outputProperties.propertyNames();
while (names.hasMoreElements()) {
final String name = (String) names.nextElement();
base.setProperty(name, outputProperties.getProperty(name));
}
}
else {
base.setProperty(OutputKeys.ENCODING, _translet._encoding);
if (_translet._method != null)
base.setProperty(OutputKeys.METHOD, _translet._method);
}
// Update defaults based on output method
final String method = base.getProperty(OutputKeys.METHOD);
if (method != null) {
if (method.equals("html")) {
setDefaults(defaults,"html");
}
else if (method.equals("text")) {
setDefaults(defaults,"text");
}
}
return base;
}
/**
* Internal method to get the default properties from the
* serializer factory and set them on the property object.
* @param props a java.util.Property object on which the properties are set.
* @param method The output method type, one of "xml", "text", "html" ...
*/
private void setDefaults(Properties props, String method)
{
final Properties method_props =
OutputPropertiesFactory.getDefaultMethodProperties(method);
{
final Enumeration names = method_props.propertyNames();
while (names.hasMoreElements())
{
final String name = (String)names.nextElement();
props.setProperty(name, method_props.getProperty(name));
}
}
}
/**
* Verifies if a given output property name is a property defined in
* the JAXP 1.1 / TrAX spec
*/
private boolean validOutputProperty(String name) {
return (name.equals(OutputKeys.ENCODING) ||
name.equals(OutputKeys.METHOD) ||
name.equals(OutputKeys.INDENT) ||
name.equals(OutputKeys.DOCTYPE_PUBLIC) ||
name.equals(OutputKeys.DOCTYPE_SYSTEM) ||
name.equals(OutputKeys.CDATA_SECTION_ELEMENTS) ||
name.equals(OutputKeys.MEDIA_TYPE) ||
name.equals(OutputKeys.OMIT_XML_DECLARATION) ||
name.equals(OutputKeys.STANDALONE) ||
name.equals(OutputKeys.VERSION) ||
name.equals(OutputPropertiesFactory.ORACLE_IS_STANDALONE) ||
name.charAt(0) == '{');
}
/**
* Checks if a given output property is default (2nd layer only)
*/
private boolean isDefaultProperty(String name, Properties properties) {
return (properties.get(name) == null);
}
/**
* Implements JAXP's Transformer.setParameter()
* Add a parameter for the transformation. The parameter is simply passed
* on to the translet - no validation is performed - so any unused
* parameters are quitely ignored by the translet.
*
* @param name The name of the parameter
* @param value The value to assign to the parameter
*/
@Override
public void setParameter(String name, Object value) {
if (value == null) {
ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_INVALID_SET_PARAM_VALUE, name);
throw new IllegalArgumentException(err.toString());
}
if (_isIdentity) {
if (_parameters == null) {
_parameters = new Hashtable();
}
_parameters.put(name, value);
}
else {
_translet.addParameter(name, value);
}
}
/**
* Implements JAXP's Transformer.clearParameters()
* Clear all parameters set with setParameter. Clears the translet's
* parameter stack.
*/
@Override
public void clearParameters() {
if (_isIdentity && _parameters != null) {
_parameters.clear();
}
else {
_translet.clearParameters();
}
}
/**
* Implements JAXP's Transformer.getParameter()
* Returns the value of a given parameter. Note that the translet will not
* keep values for parameters that were not defined in the stylesheet.
*
* @param name The name of the parameter
* @return An object that contains the value assigned to the parameter
*/
@Override
public final Object getParameter(String name) {
if (_isIdentity) {
return (_parameters != null) ? _parameters.get(name) : null;
}
else {
return _translet.getParameter(name);
}
}
/**
* Implements JAXP's Transformer.getURIResolver()
* Set the object currently used to resolve URIs used in document().
*
* @return The URLResolver object currently in use
*/
@Override
public URIResolver getURIResolver() {
return _uriResolver;
}
/**
* Implements JAXP's Transformer.setURIResolver()
* Set an object that will be used to resolve URIs used in document().
*
* @param resolver The URIResolver to use in document()
*/
@Override
public void setURIResolver(URIResolver resolver) {
_uriResolver = resolver;
}
/**
* This class should only be used as a DOMCache for the translet if the
* URIResolver has been set.
*
* The method implements XSLTC's DOMCache interface, which is used to
* plug in an external document loader into a translet. This method acts
* as an adapter between TrAX's URIResolver interface and XSLTC's
* DOMCache interface. This approach is simple, but removes the
* possibility of using external document caches with XSLTC.
*
* @param baseURI The base URI used by the document call.
* @param href The href argument passed to the document function.
* @param translet A reference to the translet requesting the document
*/
@Override
public DOM retrieveDocument(String baseURI, String href, Translet translet) {
try {
// Argument to document function was: document('');
if (href.length() == 0) {
href = baseURI;
}
/*
* Fix for bug 24188
* Incase the _uriResolver.resolve(href,base) is null
* try to still retrieve the document before returning null
* and throwing the FileNotFoundException in
* com.sun.org.apache.xalan.internal.xsltc.dom.LoadDocument
*
*/
Source resolvedSource = _uriResolver.resolve(href, baseURI);
if (resolvedSource == null) {
StreamSource streamSource = new StreamSource(
SystemIDResolver.getAbsoluteURI(href, baseURI));
return getDOM(streamSource) ;
}
return getDOM(resolvedSource);
}
catch (TransformerException e) {
if (_errorListener != null)
postErrorToListener("File not found: " + e.getMessage());
return(null);
}
}
/**
* Receive notification of a recoverable error.
* The transformer must continue to provide normal parsing events after
* invoking this method. It should still be possible for the application
* to process the document through to the end.
*
* @param e The warning information encapsulated in a transformer
* exception.
* @throws TransformerException if the application chooses to discontinue
* the transformation (always does in our case).
*/
@Override
public void error(TransformerException e)
throws TransformerException
{
Throwable wrapped = e.getException();
if (wrapped != null) {
System.err.println(new ErrorMsg(ErrorMsg.ERROR_PLUS_WRAPPED_MSG,
e.getMessageAndLocation(),
wrapped.getMessage()));
} else {
System.err.println(new ErrorMsg(ErrorMsg.ERROR_MSG,
e.getMessageAndLocation()));
}
throw e;
}
/**
* Receive notification of a non-recoverable error.
* The application must assume that the transformation cannot continue
* after the Transformer has invoked this method, and should continue
* (if at all) only to collect addition error messages. In fact,
* Transformers are free to stop reporting events once this method has
* been invoked.
*
* @param e The warning information encapsulated in a transformer
* exception.
* @throws TransformerException if the application chooses to discontinue
* the transformation (always does in our case).
*/
@Override
public void fatalError(TransformerException e)
throws TransformerException
{
Throwable wrapped = e.getException();
if (wrapped != null) {
System.err.println(new ErrorMsg(ErrorMsg.FATAL_ERR_PLUS_WRAPPED_MSG,
e.getMessageAndLocation(),
wrapped.getMessage()));
} else {
System.err.println(new ErrorMsg(ErrorMsg.FATAL_ERR_MSG,
e.getMessageAndLocation()));
}
throw e;
}
/**
* Receive notification of a warning.
* Transformers can use this method to report conditions that are not
* errors or fatal errors. The default behaviour is to take no action.
* After invoking this method, the Transformer must continue with the
* transformation. It should still be possible for the application to
* process the document through to the end.
*
* @param e The warning information encapsulated in a transformer
* exception.
* @throws TransformerException if the application chooses to discontinue
* the transformation (never does in our case).
*/
@Override
public void warning(TransformerException e)
throws TransformerException
{
Throwable wrapped = e.getException();
if (wrapped != null) {
System.err.println(new ErrorMsg(ErrorMsg.WARNING_PLUS_WRAPPED_MSG,
e.getMessageAndLocation(),
wrapped.getMessage()));
} else {
System.err.println(new ErrorMsg(ErrorMsg.WARNING_MSG,
e.getMessageAndLocation()));
}
}
/**
* This method resets the Transformer to its original configuration
* Transformer code is reset to the same state it was when it was
* created
* @since 1.5
*/
@Override
public void reset() {
_method = null;
_encoding = null;
_sourceSystemId = null;
_errorListener = this;
_uriResolver = null;
_dom = null;
_parameters = null;
_indentNumber = 0;
setOutputProperties (null);
_tohFactory = null;
_ostream = null;
}
}
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