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.language.xpath;
018    
019    import javax.xml.namespace.QName;
020    import javax.xml.xpath.XPathFactory;
021    
022    import org.apache.camel.Expression;
023    import org.apache.camel.Predicate;
024    import org.apache.camel.builder.xml.XPathBuilder;
025    import org.apache.camel.support.LanguageSupport;
026    
027    /**
028     * XPath language.
029     */
030    public class XPathLanguage extends LanguageSupport {
031        private QName resultType;
032        private XPathFactory xpathFactory;
033        private Boolean useSaxon;
034        private String objectModelUri;
035    
036        public Predicate createPredicate(String expression) {
037            expression = loadResource(expression);
038    
039            XPathBuilder builder = XPathBuilder.xpath(expression);
040            configureBuilder(builder);
041            return builder;
042        }
043    
044        public Expression createExpression(String expression) {
045            expression = loadResource(expression);
046    
047            XPathBuilder builder = XPathBuilder.xpath(expression);
048            configureBuilder(builder);
049            return builder;
050        }
051    
052        public QName getResultType() {
053            return resultType;
054        }
055    
056        public void setResultType(QName resultType) {
057            this.resultType = resultType;
058        }
059    
060        public XPathFactory getXpathFactory() {
061            return xpathFactory;
062        }
063    
064        public void setXpathFactory(XPathFactory xpathFactory) {
065            this.xpathFactory = xpathFactory;
066        }
067    
068        public void setUseSaxon(Boolean useSaxon) {
069            this.useSaxon = useSaxon;
070        }
071    
072        public Boolean getUseSaxon() {
073            return useSaxon;
074        }
075    
076        public Boolean isUseSaxon() {
077            return useSaxon != null && useSaxon;
078        }
079    
080        public String getObjectModelUri() {
081            return objectModelUri;
082        }
083    
084        public void setObjectModelUri(String objectModelUri) {
085            this.objectModelUri = objectModelUri;
086        }
087    
088        protected void configureBuilder(XPathBuilder builder) {
089            if (resultType != null) {
090                builder.setResultQName(resultType);
091            }
092    
093            if (isUseSaxon()) {
094                builder.enableSaxon();
095            } else {
096                if (xpathFactory != null) {
097                    builder.setXPathFactory(xpathFactory);
098                }
099                if (objectModelUri != null) {
100                    builder.setObjectModelUri(objectModelUri);
101                }
102            }
103        }
104    
105        public boolean isSingleton() {
106            return false;
107        }
108    }