| /* |
| * 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 javax.xml.parsers.SAXParserFactory; |
| import javax.xml.transform.Transformer; |
| import javax.xml.transform.TransformerException; |
| import javax.xml.transform.TransformerFactory; |
| import javax.xml.transform.sax.SAXSource; |
| import javax.xml.transform.stream.StreamResult; |
| import javax.xml.transform.stream.StreamSource; |
| |
| import org.xml.sax.InputSource; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.SAXParseException; |
| import org.xml.sax.XMLReader; |
| import org.xml.sax.helpers.DefaultHandler; |
| |
| /** |
| * Validate the XML input by using SAXParserFactory to turn on namespace awareness and |
| * validation, and a SAX XMLReader to parse the input and report problems to an error |
| * handler. |
| * |
| * This sample uses birds.xml with an internal DOCTYPE declaration. As shipped, birds.xml |
| * contains an element that violates the declared document type. |
| */ |
| public class ValidateXMLInput |
| { |
| |
| public static void main(String[] args) |
| throws Exception |
| { |
| ValidateXMLInput v = new ValidateXMLInput(); |
| v.validate(); |
| } |
| |
| void validate() |
| throws Exception |
| { |
| // Since we're going to use a SAX feature, the transformer must support |
| // input in the form of a SAXSource. |
| TransformerFactory tfactory = TransformerFactory.newInstance(); |
| if(tfactory.getFeature(SAXSource.FEATURE)) |
| { |
| // Standard way of creating an XMLReader in JAXP 1.1. |
| SAXParserFactory pfactory= SAXParserFactory.newInstance(); |
| pfactory.setNamespaceAware(true); // Very important! |
| // Turn on validation. |
| pfactory.setValidating(true); |
| // Get an XMLReader. |
| XMLReader reader = pfactory.newSAXParser().getXMLReader(); |
| |
| // Instantiate an error handler (see the Handler inner class below) that will report any |
| // errors or warnings that occur as the XMLReader is parsing the XML input. |
| Handler handler = new Handler(); |
| reader.setErrorHandler(handler); |
| |
| // Standard way of creating a transformer from a URL. |
| Transformer t = tfactory.newTransformer( |
| new StreamSource("birds.xsl")); |
| |
| // Specify a SAXSource that takes both an XMLReader and a URL. |
| SAXSource source = new SAXSource(reader, |
| new InputSource("birds.xml")); |
| |
| // Transform to a file. |
| try |
| { |
| t.transform(source, new StreamResult("birds.out")); |
| } |
| catch (TransformerException te) |
| { |
| // The TransformerException wraps someting other than a SAXParseException |
| // warning or error, either of which should be "caught" by the Handler. |
| System.out.println("Not a SAXParseException warning or error: " + te.getMessage()); |
| } |
| |
| System.out.println("=====Done====="); |
| } |
| else |
| System.out.println("tfactory does not support SAX features!"); |
| } |
| |
| // Catch any errors or warnings from the XMLReader. |
| class Handler extends DefaultHandler |
| { |
| public void warning (SAXParseException spe) |
| throws SAXException |
| { |
| System.out.println("SAXParseException warning: " + spe.getMessage()); |
| } |
| |
| public void error (SAXParseException spe) |
| throws SAXException |
| { |
| System.out.println("SAXParseException error: " + spe.getMessage()); |
| } |
| } |
| } |