001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.camel.model.language; 018 019import java.util.Map; 020import javax.xml.bind.annotation.XmlAccessType; 021import javax.xml.bind.annotation.XmlAccessorType; 022import javax.xml.bind.annotation.XmlTransient; 023 024import org.apache.camel.CamelContext; 025import org.apache.camel.Expression; 026import org.apache.camel.Predicate; 027import org.apache.camel.spi.NamespaceAware; 028 029/** 030 * A useful base class for any expression which may be namespace or XML content aware 031 * such as {@link XPathExpression} or {@link XQueryExpression} 032 * 033 * @version 034 */ 035@XmlAccessorType(XmlAccessType.FIELD) 036public abstract class NamespaceAwareExpression extends ExpressionDefinition implements NamespaceAware { 037 @XmlTransient 038 private Map<String, String> namespaces; 039 040 public NamespaceAwareExpression() { 041 } 042 043 public NamespaceAwareExpression(String expression) { 044 super(expression); 045 } 046 047 048 public Map<String, String> getNamespaces() { 049 return namespaces; 050 } 051 052 /** 053 * Injects the XML Namespaces of prefix -> uri mappings 054 * 055 * @param namespaces the XML namespaces with the key of prefixes and the value the URIs 056 */ 057 public void setNamespaces(Map<String, String> namespaces) { 058 this.namespaces = namespaces; 059 } 060 061 @Override 062 protected void configureExpression(CamelContext camelContext, Expression expression) { 063 configureNamespaceAware(expression); 064 super.configureExpression(camelContext, expression); 065 } 066 067 @Override 068 protected void configurePredicate(CamelContext camelContext, Predicate predicate) { 069 configureNamespaceAware(predicate); 070 super.configurePredicate(camelContext, predicate); 071 } 072 073 protected void configureNamespaceAware(Object builder) { 074 if (namespaces != null && builder instanceof NamespaceAware) { 075 NamespaceAware namespaceAware = (NamespaceAware) builder; 076 namespaceAware.setNamespaces(namespaces); 077 } 078 } 079}