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 */
017 package org.apache.camel.model.language;
018
019 import java.util.Map;
020
021 import javax.xml.bind.annotation.XmlAccessType;
022 import javax.xml.bind.annotation.XmlAccessorType;
023 import javax.xml.bind.annotation.XmlTransient;
024
025 import org.apache.camel.Expression;
026 import org.apache.camel.Predicate;
027 import org.apache.camel.spi.NamespaceAware;
028 import org.apache.camel.spi.RouteContext;
029
030 /**
031 * A useful base class for any expression which may be namespace or XML content aware
032 * such as {@link XPathExpression} or {@link XQueryExpression}
033 *
034 * @version $Revision: 750806 $
035 */
036 @XmlAccessorType(XmlAccessType.FIELD)
037 public abstract class NamespaceAwareExpression extends ExpressionDefinition implements NamespaceAware {
038 @XmlTransient
039 private Map<String, String> namespaces;
040
041 public NamespaceAwareExpression() {
042 }
043
044 public NamespaceAwareExpression(String expression) {
045 super(expression);
046 }
047
048
049 public Map<String, String> getNamespaces() {
050 return namespaces;
051 }
052
053 /**
054 * Injects the XML Namespaces of prefix -> uri mappings
055 *
056 * @param namespaces the XML namespaces with the key of prefixes and the value the URIs
057 */
058 public void setNamespaces(Map<String, String> namespaces) {
059 this.namespaces = namespaces;
060 }
061
062 @Override
063 protected void configureExpression(RouteContext routeContext, Expression expression) {
064 configureNamespaceAware(expression);
065 }
066
067 @Override
068 protected void configurePredicate(RouteContext routeContext, Predicate predicate) {
069 configureNamespaceAware(predicate);
070 }
071
072 protected void configureNamespaceAware(Object builder) {
073 if (namespaces != null && builder instanceof NamespaceAware) {
074 NamespaceAware namespaceAware = (NamespaceAware) builder;
075 namespaceAware.setNamespaces(namespaces);
076 }
077 }
078 }