1 /*** 2 * Copyright 2004 The Apache Software Foundation. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package org.apache.commons.jelly.tags.jaxme; 17 18 import java.io.File; 19 import java.io.IOException; 20 21 import javax.xml.bind.UnmarshallerHandler; 22 import javax.xml.bind.Unmarshaller; 23 import javax.xml.bind.JAXBException; 24 import javax.xml.bind.JAXBContext; 25 26 import org.apache.commons.jelly.TagSupport; 27 import org.apache.commons.jelly.XMLOutput; 28 import org.apache.commons.jelly.MissingAttributeException; 29 import org.apache.commons.jelly.JellyTagException; 30 31 import org.apache.ws.jaxme.generator.Generator; 32 import org.apache.ws.jaxme.generator.SchemaReader; 33 import org.apache.ws.jaxme.generator.sg.impl.JAXBSchemaReader; 34 import org.apache.ws.jaxme.generator.sg.SchemaSG; 35 import org.apache.ws.jaxme.generator.impl.GeneratorImpl; 36 37 import org.xml.sax.SAXException; 38 39 /*** 40 * <p>Unmarshalls xml documents into java objects.</p> 41 * <p> 42 * This tag unmarshalls the xml content contained 43 * into the JaxMe generated java objects in the packages specified. 44 * </p> 45 * 46 * @author <a href="mailto:joe@ispsoft.de">Jochen Wiedmann</a> 47 * @author <a href="mailto:commons-dev at jakarta.apache.org">Apache Commons Development Team</a> 48 * @version $Revision: 155420 $ 49 */ 50 public class UnmarshallTag extends TagSupport { 51 52 private String packages; 53 private String var; 54 55 public String getPackages() { 56 return packages; 57 } 58 59 /*** 60 * Defines the generated objects to which the xml should be unmarshalled. 61 */ 62 public void setPackages(String packages) { 63 this.packages = packages; 64 } 65 66 public String getVar() { 67 return var; 68 } 69 70 /*** 71 * Sets the name of the jelly variable to which 72 * the unmarshalled java object should be bound. 73 */ 74 public void setVar(String var) { 75 this.var = var; 76 } 77 78 public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException { 79 if (packages == null) { 80 throw new MissingAttributeException( "packages" ); 81 } 82 if ( var == null ) { 83 throw new MissingAttributeException( "var" ); 84 } 85 try { 86 87 JAXBContext jaxbContext = JAXBContext.newInstance(packages); 88 Unmarshaller unmarshaller = jaxbContext.createUnmarshaller(); 89 UnmarshallerHandler handler = unmarshaller.getUnmarshallerHandler(); 90 91 handler.startDocument(); 92 93 XMLOutput newOutput = new XMLOutput( handler ); 94 95 invokeBody(newOutput); 96 handler.endDocument(); 97 98 Object result = handler.getResult(); 99 context.setVariable( var, result ); 100 101 } catch (JAXBException ex) { 102 throw new JellyTagException(ex); 103 } catch (SAXException ex) { 104 throw new JellyTagException(ex); 105 } 106 107 } 108 }