| /* |
| * 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. |
| */ |
| /* |
| * $Id$ |
| */ |
| |
| import java.io.IOException; |
| |
| import javax.xml.transform.TransformerConfigurationException; |
| import javax.xml.transform.TransformerException; |
| import javax.xml.transform.TransformerFactory; |
| import javax.xml.transform.sax.SAXResult; |
| import javax.xml.transform.sax.SAXSource; |
| import javax.xml.transform.sax.SAXTransformerFactory; |
| import javax.xml.transform.stream.StreamSource; |
| |
| import org.apache.xml.serializer.Serializer; |
| import org.apache.xml.serializer.SerializerFactory; |
| import org.apache.xml.serializer.OutputPropertiesFactory; |
| import org.xml.sax.InputSource; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.XMLFilter; |
| import org.xml.sax.XMLReader; |
| import org.xml.sax.helpers.XMLReaderFactory; |
| |
| /** |
| * This example shows how to chain a series of transformations by |
| * piping SAX events from one Transformer to another. Each Transformer |
| * operates as a SAX2 XMLFilter/XMLReader. |
| */ |
| public class UseXMLFilters |
| { |
| public static void main(String[] args) |
| throws TransformerException, TransformerConfigurationException, |
| SAXException, IOException |
| { |
| // Instantiate a TransformerFactory. |
| TransformerFactory tFactory = TransformerFactory.newInstance(); |
| // Determine whether the TransformerFactory supports The use uf SAXSource |
| // and SAXResult |
| if (tFactory.getFeature(SAXSource.FEATURE) && tFactory.getFeature(SAXResult.FEATURE)) |
| { |
| // Cast the TransformerFactory to SAXTransformerFactory. |
| SAXTransformerFactory saxTFactory = ((SAXTransformerFactory) tFactory); |
| // Create an XMLFilter for each stylesheet. |
| XMLFilter xmlFilter1 = saxTFactory.newXMLFilter(new StreamSource("foo1.xsl")); |
| XMLFilter xmlFilter2 = saxTFactory.newXMLFilter(new StreamSource("foo2.xsl")); |
| XMLFilter xmlFilter3 = saxTFactory.newXMLFilter(new StreamSource("foo3.xsl")); |
| |
| // Create an XMLReader. |
| XMLReader reader = XMLReaderFactory.createXMLReader(); |
| |
| // xmlFilter1 uses the XMLReader as its reader. |
| xmlFilter1.setParent(reader); |
| |
| // xmlFilter2 uses xmlFilter1 as its reader. |
| xmlFilter2.setParent(xmlFilter1); |
| |
| // xmlFilter3 uses xmlFilter2 as its reader. |
| xmlFilter3.setParent(xmlFilter2); |
| |
| // xmlFilter3 outputs SAX events to the serializer. |
| java.util.Properties xmlProps = OutputPropertiesFactory.getDefaultMethodProperties("xml"); |
| xmlProps.setProperty("indent", "yes"); |
| xmlProps.setProperty("standalone", "no"); |
| Serializer serializer = SerializerFactory.getSerializer(xmlProps); |
| serializer.setOutputStream(System.out); |
| xmlFilter3.setContentHandler(serializer.asContentHandler()); |
| |
| // Perform the series of transformations as follows: |
| // - transformer3 gets its parent (transformer2) as the XMLReader/XMLFilter |
| // and calls transformer2.parse(new InputSource("foo.xml")). |
| // - transformer2 gets its parent (transformer1) as the XMLReader/XMLFilter |
| // and calls transformer1.parse(new InputSource("foo.xml")). |
| // - transformer1 gets its parent (reader, a SAXParser) as the XMLReader |
| // and calls reader.parse(new InputSource("foo.xml")). |
| // - reader parses the XML document and sends the SAX parse events to transformer1, |
| // which performs transformation 1 and sends the output to transformer2. |
| // - transformer2 parses the transformation 1 output, performs transformation 2, and |
| // sends the output to transformer3. |
| // - transformer3 parses the transformation 2 output, performs transformation 3, |
| // and sends the output to the serializer. |
| xmlFilter3.parse(new InputSource("foo.xml")); |
| } |
| } |
| } |