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; 020 021import javax.xml.bind.annotation.XmlAccessType; 022import javax.xml.bind.annotation.XmlAccessorType; 023import javax.xml.bind.annotation.XmlTransient; 024 025import org.apache.camel.CamelContext; 026import org.apache.camel.Expression; 027import org.apache.camel.Predicate; 028import org.apache.camel.spi.NamespaceAware; 029 030/** 031 * A useful base class for any expression which may be namespace or XML content 032 * aware such as {@link XPathExpression} or {@link XQueryExpression} 033 */ 034@XmlAccessorType(XmlAccessType.FIELD) 035public abstract class NamespaceAwareExpression extends ExpressionDefinition implements NamespaceAware { 036 @XmlTransient 037 private Map<String, String> namespaces; 038 039 public NamespaceAwareExpression() { 040 } 041 042 public NamespaceAwareExpression(String expression) { 043 super(expression); 044 } 045 046 @Override 047 public Map<String, String> getNamespaces() { 048 return namespaces; 049 } 050 051 /** 052 * Injects the XML Namespaces of prefix -> uri mappings 053 * 054 * @param namespaces the XML namespaces with the key of prefixes and the 055 * value the URIs 056 */ 057 @Override 058 public void setNamespaces(Map<String, String> namespaces) { 059 this.namespaces = namespaces; 060 } 061 062 @Override 063 protected void configureExpression(CamelContext camelContext, Expression expression) { 064 configureNamespaceAware(expression); 065 super.configureExpression(camelContext, expression); 066 } 067 068 @Override 069 protected void configurePredicate(CamelContext camelContext, Predicate predicate) { 070 configureNamespaceAware(predicate); 071 super.configurePredicate(camelContext, predicate); 072 } 073 074 protected void configureNamespaceAware(Object builder) { 075 if (namespaces != null && builder instanceof NamespaceAware) { 076 NamespaceAware namespaceAware = (NamespaceAware)builder; 077 namespaceAware.setNamespaces(namespaces); 078 } 079 } 080}