1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 // $Id: JAXPVariableStack.java 524815 2007-04-02 15:52:15Z zongaro $ 19 20 package org.apache.xpath.jaxp; 21 22 import javax.xml.transform.TransformerException; 23 import javax.xml.xpath.XPathVariableResolver; 24 25 import org.apache.xml.utils.QName; 26 import org.apache.xpath.VariableStack; 27 import org.apache.xpath.XPathContext; 28 import org.apache.xpath.objects.XObject; 29 30 import org.apache.xpath.res.XPATHErrorResources; 31 import org.apache.xalan.res.XSLMessages; 32 33 34 /** 35 * Overrides {@link VariableStack} and delegates the call to 36 * {@link javax.xml.xpath.XPathVariableResolver}. 37 * 38 * @author Ramesh Mandava ( ramesh.mandava@sun.com ) 39 */ 40 public class JAXPVariableStack extends VariableStack { 41 42 private final XPathVariableResolver resolver; 43 JAXPVariableStack(XPathVariableResolver resolver)44 public JAXPVariableStack(XPathVariableResolver resolver) { 45 super(2); 46 this.resolver = resolver; 47 } 48 getVariableOrParam(XPathContext xctxt, QName qname)49 public XObject getVariableOrParam(XPathContext xctxt, QName qname) 50 throws TransformerException,IllegalArgumentException { 51 if ( qname == null ) { 52 //JAXP 1.3 spec says that if variable name is null then 53 // we need to through IllegalArgumentException 54 String fmsg = XSLMessages.createXPATHMessage( 55 XPATHErrorResources.ER_ARG_CANNOT_BE_NULL, 56 new Object[] {"Variable qname"} ); 57 throw new IllegalArgumentException( fmsg ); 58 } 59 javax.xml.namespace.QName name = 60 new javax.xml.namespace.QName( 61 qname.getNamespace(), 62 qname.getLocalPart()); 63 Object varValue = resolver.resolveVariable( name ); 64 if ( varValue == null ) { 65 String fmsg = XSLMessages.createXPATHMessage( 66 XPATHErrorResources.ER_RESOLVE_VARIABLE_RETURNS_NULL, 67 new Object[] { name.toString()} ); 68 throw new TransformerException( fmsg ); 69 } 70 return XObject.create( varValue, xctxt ); 71 } 72 73 } 74