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    
021    import org.apache.camel.Expression;
022    import org.apache.camel.IsSingleton;
023    import org.apache.camel.Predicate;
024    import org.apache.camel.builder.xml.XPathBuilder;
025    import org.apache.camel.spi.Language;
026    
027    /**
028     * XPath language.
029     *
030     * @version $Revision: 2987 $
031     */
032    public class XPathLanguage implements Language, IsSingleton {
033        private QName resultType;
034    
035        public Predicate createPredicate(String expression) {
036            XPathBuilder builder = XPathBuilder.xpath(expression);
037            configureBuilder(builder);
038            return builder;
039        }
040    
041        public Expression createExpression(String expression) {
042            XPathBuilder builder = XPathBuilder.xpath(expression);
043            configureBuilder(builder);
044            return builder;
045        }
046    
047        public QName getResultType() {
048            return resultType;
049        }
050    
051        public void setResultType(QName resultType) {
052            this.resultType = resultType;
053        }
054    
055        protected void configureBuilder(XPathBuilder builder) {
056            if (resultType != null) {
057                builder.setResultQName(resultType);
058            }
059        }
060    
061        public boolean isSingleton() {
062            return false;
063        }
064    }