Coverage Report - org.jaxen.function.ext.EvaluateFunction
 
Classes in this File Line Coverage Branch Coverage Complexity
EvaluateFunction
79%
15/19
100%
3/3
5.5
 
 1  
 /*
 2  
  * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/ext/EvaluateFunction.java,v 1.10 2006/02/05 21:47:42 elharo Exp $
 3  
  * $Revision: 1.10 $
 4  
  * $Date: 2006/02/05 21:47:42 $
 5  
  *
 6  
  * ====================================================================
 7  
  *
 8  
  * Copyright 2000-2002 bob mcwhirter & James Strachan.
 9  
  * All rights reserved.
 10  
  *
 11  
  * Redistribution and use in source and binary forms, with or without
 12  
  * modification, are permitted provided that the following conditions are
 13  
  * met:
 14  
  * 
 15  
  *   * Redistributions of source code must retain the above copyright
 16  
  *     notice, this list of conditions and the following disclaimer.
 17  
  * 
 18  
  *   * Redistributions in binary form must reproduce the above copyright
 19  
  *     notice, this list of conditions and the following disclaimer in the
 20  
  *     documentation and/or other materials provided with the distribution.
 21  
  * 
 22  
  *   * Neither the name of the Jaxen Project nor the names of its
 23  
  *     contributors may be used to endorse or promote products derived 
 24  
  *     from this software without specific prior written permission.
 25  
  * 
 26  
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 27  
  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 28  
  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 29  
  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 30  
  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 31  
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 32  
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 33  
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 34  
  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 35  
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 36  
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 37  
  *
 38  
  * ====================================================================
 39  
  * This software consists of voluntary contributions made by many 
 40  
  * individuals on behalf of the Jaxen Project and was originally 
 41  
  * created by bob mcwhirter <bob@werken.com> and 
 42  
  * James Strachan <jstrachan@apache.org>.  For more information on the 
 43  
  * Jaxen Project, please see <http://www.jaxen.org/>.
 44  
  * 
 45  
  * $Id: EvaluateFunction.java,v 1.10 2006/02/05 21:47:42 elharo Exp $
 46  
  */
 47  
 
 48  
 package org.jaxen.function.ext;
 49  
 
 50  
 import java.util.Collections;
 51  
 import java.util.List;
 52  
 
 53  
 import org.jaxen.Context;
 54  
 import org.jaxen.ContextSupport;
 55  
 import org.jaxen.Function;
 56  
 import org.jaxen.FunctionCallException;
 57  
 import org.jaxen.Navigator;
 58  
 import org.jaxen.XPath;
 59  
 import org.jaxen.function.StringFunction;
 60  
 
 61  
 /**
 62  
  * <code><i>node-set</i> evaluate(<i>string</i>)</code> 
 63  
  *  
 64  
  * @author Erwin Bolwidt (ejb @ klomp.org)
 65  
  */
 66  104
 public class EvaluateFunction implements Function
 67  
 {
 68  
     public Object call( Context context, List args )
 69  
         throws FunctionCallException
 70  
     {
 71  56
         if ( args.size() == 1 ) {
 72  56
             return evaluate( context, args.get(0));
 73  
         }
 74  
 
 75  0
         throw new FunctionCallException( "evaluate() requires one argument" );
 76  
     }
 77  
 
 78  
     public static List evaluate (Context context, Object arg)
 79  
         throws FunctionCallException
 80  
     {
 81  56
         List contextNodes = context.getNodeSet();
 82  
         
 83  56
         if (contextNodes.size() == 0)
 84  0
             return Collections.EMPTY_LIST;
 85  
       
 86  56
         Navigator nav = context.getNavigator();
 87  
 
 88  
         String xpathString;
 89  56
         if ( arg instanceof String )
 90  40
             xpathString = (String)arg;
 91  
         else
 92  16
             xpathString = StringFunction.evaluate(arg, nav);
 93  
 
 94  
         try {
 95  56
             XPath xpath = nav.parseXPath(xpathString);
 96  56
             ContextSupport support = context.getContextSupport();
 97  56
             xpath.setVariableContext( support.getVariableContext() );
 98  56
             xpath.setFunctionContext( support.getFunctionContext() );
 99  56
             xpath.setNamespaceContext( support.getNamespaceContext() );
 100  56
             return xpath.selectNodes( context.duplicate() );
 101  
         }
 102  0
         catch ( org.jaxen.saxpath.SAXPathException e ) {
 103  0
             throw new FunctionCallException(e.toString());
 104  
         }
 105  
     }
 106  
 }
 107