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.component.bean;
018    
019    import java.lang.annotation.Annotation;
020    
021    import org.apache.camel.CamelContext;
022    import org.apache.camel.Expression;
023    import org.apache.camel.builder.xml.XPathBuilder;
024    import org.apache.camel.language.LanguageAnnotation;
025    import org.apache.camel.language.NamespacePrefix;
026    import org.apache.camel.language.XPath;
027    
028    /**
029     * Factory for the XPath expression annotations.
030     *
031     * @version $Revision: 41910 $
032     */
033    public class XPathAnnotationExpressionFactory extends DefaultAnnotationExpressionFactory {
034    
035        @Override
036        public Expression createExpression(CamelContext camelContext, Annotation annotation, LanguageAnnotation languageAnnotation, Class expressionReturnType) {
037            String xpath = getExpressionFromAnnotation(annotation);
038            XPathBuilder builder = XPathBuilder.xpath(xpath);
039            if (annotation instanceof XPath) {
040                XPath xpathAnnotation = (XPath) annotation;
041                NamespacePrefix[] namespaces = xpathAnnotation.namespaces();
042                if (namespaces != null) {
043                    for (NamespacePrefix namespacePrefix : namespaces) {
044                        builder = builder.namespace(namespacePrefix.prefix(), namespacePrefix.uri());
045                    }
046                }
047            }
048            return builder;
049        }
050    }