| /* |
| * 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. |
| */ |
| /* |
| * $Id: TrAXFilter.java 468645 2006-10-28 06:57:24Z minchau $ |
| */ |
| package org.apache.xalan.transformer; |
| |
| import java.io.IOException; |
| |
| import javax.xml.XMLConstants; |
| import javax.xml.transform.ErrorListener; |
| import javax.xml.transform.Templates; |
| import javax.xml.transform.TransformerConfigurationException; |
| |
| import org.apache.xalan.res.XSLMessages; |
| import org.apache.xalan.res.XSLTErrorResources; |
| |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.DTDHandler; |
| import org.xml.sax.EntityResolver; |
| import org.xml.sax.InputSource; |
| import org.xml.sax.XMLReader; |
| import org.xml.sax.helpers.XMLFilterImpl; |
| import org.xml.sax.helpers.XMLReaderFactory; |
| |
| |
| public class TrAXFilter extends XMLFilterImpl |
| { |
| private Templates m_templates; |
| private TransformerImpl m_transformer; |
| |
| /** |
| * Construct an empty XML filter, with no parent. |
| * |
| * <p>This filter will have no parent: you must assign a parent |
| * before you start a parse or do any configuration with |
| * setFeature or setProperty.</p> |
| * |
| * @see org.xml.sax.XMLReader#setFeature |
| * @see org.xml.sax.XMLReader#setProperty |
| */ |
| public TrAXFilter (Templates templates) |
| throws TransformerConfigurationException |
| { |
| m_templates = templates; |
| m_transformer = (TransformerImpl)templates.newTransformer(); |
| } |
| |
| /** |
| * Return the Transformer object used for this XML filter. |
| */ |
| public TransformerImpl getTransformer() |
| { |
| return m_transformer; |
| } |
| |
| /** Set the parent reader. |
| * |
| * <p>This is the {@link org.xml.sax.XMLReader XMLReader} from which |
| * this filter will obtain its events and to which it will pass its |
| * configuration requests. The parent may itself be another filter.</p> |
| * |
| * <p>If there is no parent reader set, any attempt to parse |
| * or to set or get a feature or property will fail.</p> |
| * |
| * @param parent The parent XML reader. |
| * @throws java.lang.NullPointerException If the parent is null. |
| */ |
| public void setParent (XMLReader parent) |
| { |
| super.setParent(parent); |
| |
| if(null != parent.getContentHandler()) |
| this.setContentHandler(parent.getContentHandler()); |
| |
| // Not really sure if we should do this here, but |
| // it seems safer in case someone calls parse() on |
| // the parent. |
| setupParse (); |
| } |
| |
| /** |
| * Parse a document. |
| * |
| * @param input The input source for the document entity. |
| * @throws org.xml.sax.SAXException Any SAX exception, possibly |
| * wrapping another exception. |
| * @throws java.io.IOException An IO exception from the parser, |
| * possibly from a byte stream or character stream |
| * supplied by the application. |
| * @see org.xml.sax.XMLReader#parse(org.xml.sax.InputSource) |
| */ |
| public void parse (InputSource input) |
| throws org.xml.sax.SAXException, IOException |
| { |
| if(null == getParent()) |
| { |
| XMLReader reader=null; |
| |
| // Use JAXP1.1 ( if possible ) |
| try { |
| javax.xml.parsers.SAXParserFactory factory= |
| javax.xml.parsers.SAXParserFactory.newInstance(); |
| factory.setNamespaceAware( true ); |
| |
| if (m_transformer.getStylesheet().isSecureProcessing()) { |
| try { |
| factory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true); |
| } |
| catch (org.xml.sax.SAXException se) {} |
| } |
| |
| javax.xml.parsers.SAXParser jaxpParser= |
| factory.newSAXParser(); |
| reader=jaxpParser.getXMLReader(); |
| |
| } catch( javax.xml.parsers.ParserConfigurationException ex ) { |
| throw new org.xml.sax.SAXException( ex ); |
| } catch( javax.xml.parsers.FactoryConfigurationError ex1 ) { |
| throw new org.xml.sax.SAXException( ex1.toString() ); |
| } catch( NoSuchMethodError ex2 ) { |
| } |
| catch (AbstractMethodError ame){} |
| |
| XMLReader parent; |
| if( reader==null ) |
| parent= XMLReaderFactory.createXMLReader(); |
| else |
| parent=reader; |
| try |
| { |
| parent.setFeature("http://xml.org/sax/features/namespace-prefixes", |
| true); |
| } |
| catch (org.xml.sax.SAXException se){} |
| // setParent calls setupParse... |
| setParent(parent); |
| } |
| else |
| { |
| // Make sure everything is set up. |
| setupParse (); |
| } |
| if(null == m_transformer.getContentHandler()) |
| { |
| throw new org.xml.sax.SAXException(XSLMessages.createMessage(XSLTErrorResources.ER_CANNOT_CALL_PARSE, null)); //"parse can not be called if the ContentHandler has not been set!"); |
| } |
| |
| getParent().parse(input); |
| Exception e = m_transformer.getExceptionThrown(); |
| if(null != e) |
| { |
| if(e instanceof org.xml.sax.SAXException) |
| throw (org.xml.sax.SAXException)e; |
| else |
| throw new org.xml.sax.SAXException(e); |
| } |
| } |
| |
| /** |
| * Parse a document. |
| * |
| * @param systemId The system identifier as a fully-qualified URI. |
| * @throws org.xml.sax.SAXException Any SAX exception, possibly |
| * wrapping another exception. |
| * @throws java.io.IOException An IO exception from the parser, |
| * possibly from a byte stream or character stream |
| * supplied by the application. |
| * @see org.xml.sax.XMLReader#parse(java.lang.String) |
| */ |
| public void parse (String systemId) |
| throws org.xml.sax.SAXException, IOException |
| { |
| parse(new InputSource(systemId)); |
| } |
| |
| |
| /** |
| * Set up before a parse. |
| * |
| * <p>Before every parse, check whether the parent is |
| * non-null, and re-register the filter for all of the |
| * events.</p> |
| */ |
| private void setupParse () |
| { |
| XMLReader p = getParent(); |
| if (p == null) { |
| throw new NullPointerException(XSLMessages.createMessage(XSLTErrorResources.ER_NO_PARENT_FOR_FILTER, null)); //"No parent for filter"); |
| } |
| |
| ContentHandler ch = m_transformer.getInputContentHandler(); |
| // if(ch instanceof SourceTreeHandler) |
| // ((SourceTreeHandler)ch).setUseMultiThreading(true); |
| p.setContentHandler(ch); |
| p.setEntityResolver(this); |
| p.setDTDHandler(this); |
| p.setErrorHandler(this); |
| } |
| |
| /** |
| * Set the content event handler. |
| * |
| * @param handler The new content handler. |
| * @throws java.lang.NullPointerException If the handler |
| * is null. |
| * @see org.xml.sax.XMLReader#setContentHandler |
| */ |
| public void setContentHandler (ContentHandler handler) |
| { |
| m_transformer.setContentHandler(handler); |
| // super.setContentHandler(m_transformer.getResultTreeHandler()); |
| } |
| |
| public void setErrorListener (ErrorListener handler) |
| { |
| m_transformer.setErrorListener(handler); |
| } |
| |
| } |