001    package org.apache.maven.lifecycle;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one
005     * or more contributor license agreements.  See the NOTICE file
006     * distributed with this work for additional information
007     * regarding copyright ownership.  The ASF licenses this file
008     * to you under the Apache License, Version 2.0 (the
009     * "License"); you may not use this file except in compliance
010     * with the License.  You may obtain a copy of the License at
011     *
012     *  http://www.apache.org/licenses/LICENSE-2.0
013     *
014     * Unless required by applicable law or agreed to in writing,
015     * software distributed under the License is distributed on an
016     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017     * KIND, either express or implied.  See the License for the
018     * specific language governing permissions and limitations
019     * under the License.
020     */
021    
022    import java.io.IOException;
023    import java.util.Iterator;
024    
025    import org.apache.commons.jxpath.JXPathContext;
026    import org.apache.commons.jxpath.JXPathNotFoundException;
027    import org.apache.commons.jxpath.ri.JXPathContextReferenceImpl;
028    import org.apache.maven.plugin.MojoExecution;
029    import org.apache.maven.project.harness.Xpp3DomPointerFactory;
030    
031    public class MojoExecutionXPathContainer
032    {
033        private JXPathContext context;
034    
035        static
036        {
037            JXPathContextReferenceImpl.addNodePointerFactory( new Xpp3DomPointerFactory() );
038        }
039    
040        public MojoExecutionXPathContainer( MojoExecution mojoExecution )
041            throws IOException
042        {
043            context = JXPathContext.newContext( mojoExecution );
044        }
045    
046            public Iterator<?> getIteratorForXPathExpression( String expression )
047        {
048            return context.iterate( expression );
049        }
050    
051        public boolean containsXPathExpression( String expression )
052        {
053            return context.getValue( expression ) != null;
054        }
055    
056        public Object getValue( String expression )
057        {
058            try
059            {
060                return context.getValue( expression );
061            }
062            catch ( JXPathNotFoundException e )
063            {
064                return null;
065            }
066        }
067    
068        public boolean xPathExpressionEqualsValue( String expression, String value )
069        {
070            return context.getValue( expression ) != null && context.getValue( expression ).equals( value );
071        }
072    }