Coverage Report - org.jaxen.function.ext.EvaluateFunction

Classes in this File Line Coverage Branch Coverage Complexity
EvaluateFunction
79% 
100% 
5.5

 1  
 /*
 2  
  * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/ext/EvaluateFunction.java,v 1.9 2005/06/28 13:44:45 elharo Exp $
 3  
  * $Revision: 1.9 $
 4  
  * $Date: 2005/06/28 13:44:45 $
 5  
  *
 6  
  * ====================================================================
 7  
  *
 8  
  * Copyright (C) 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
 13  
  * are met:
 14  
  * 
 15  
  * 1. Redistributions of source code must retain the above copyright
 16  
  *    notice, this list of conditions, and the following disclaimer.
 17  
  *
 18  
  * 2. Redistributions in binary form must reproduce the above copyright
 19  
  *    notice, this list of conditions, and the disclaimer that follows 
 20  
  *    these conditions in the documentation and/or other materials 
 21  
  *    provided with the distribution.
 22  
  *
 23  
  * 3. The name "Jaxen" must not be used to endorse or promote products
 24  
  *    derived from this software without prior written permission.  For
 25  
  *    written permission, please contact license@jaxen.org.
 26  
  * 
 27  
  * 4. Products derived from this software may not be called "Jaxen", nor
 28  
  *    may "Jaxen" appear in their name, without prior written permission
 29  
  *    from the Jaxen Project Management (pm@jaxen.org).
 30  
  * 
 31  
  * In addition, we request (but do not require) that you include in the 
 32  
  * end-user documentation provided with the redistribution and/or in the 
 33  
  * software itself an acknowledgement equivalent to the following:
 34  
  *     "This product includes software developed by the
 35  
  *      Jaxen Project <http://www.jaxen.org/>."
 36  
  * Alternatively, the acknowledgment may be graphical using the logos 
 37  
  * available at http://www.jaxen.org/
 38  
  *
 39  
  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 40  
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 41  
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 42  
  * DISCLAIMED.  IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT
 43  
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 44  
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 45  
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 46  
  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 47  
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 48  
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 49  
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 50  
  * SUCH DAMAGE.
 51  
  *
 52  
  * ====================================================================
 53  
  * This software consists of voluntary contributions made by many 
 54  
  * individuals on behalf of the Jaxen Project and was originally 
 55  
  * created by bob mcwhirter <bob@werken.com> and 
 56  
  * James Strachan <jstrachan@apache.org>.  For more information on the 
 57  
  * Jaxen Project, please see <http://www.jaxen.org/>.
 58  
  * 
 59  
  * $Id: EvaluateFunction.java,v 1.9 2005/06/28 13:44:45 elharo Exp $
 60  
  */
 61  
 
 62  
 package org.jaxen.function.ext;
 63  
 
 64  
 import java.util.Collections;
 65  
 import java.util.List;
 66  
 
 67  
 import org.jaxen.Context;
 68  
 import org.jaxen.ContextSupport;
 69  
 import org.jaxen.Function;
 70  
 import org.jaxen.FunctionCallException;
 71  
 import org.jaxen.Navigator;
 72  
 import org.jaxen.XPath;
 73  
 import org.jaxen.function.StringFunction;
 74  
 
 75  
 /**
 76  
  * <code><i>node-set</i> evaluate(<i>string</i>)</code> 
 77  
  *  
 78  
  * @author Erwin Bolwidt (ejb @ klomp.org)
 79  
  */
 80  288
 public class EvaluateFunction implements Function
 81  
 {
 82  
     public Object call( Context context, List args )
 83  
         throws FunctionCallException
 84  
     {
 85  168
         if ( args.size() == 1 ) {
 86  168
             return evaluate( context, args.get(0));
 87  
         }
 88  
 
 89  0
         throw new FunctionCallException( "evaluate() requires one argument" );
 90  
     }
 91  
 
 92  
     public static List evaluate (Context context, Object arg)
 93  
         throws FunctionCallException
 94  
     {
 95  168
         List contextNodes = context.getNodeSet();
 96  
         
 97  168
         if (contextNodes.size() == 0)
 98  0
             return Collections.EMPTY_LIST;
 99  
       
 100  168
         Navigator nav = context.getNavigator();
 101  
 
 102  
         String xpathString;
 103  168
         if ( arg instanceof String )
 104  120
             xpathString = (String)arg;
 105  
         else
 106  48
             xpathString = StringFunction.evaluate(arg, nav);
 107  
 
 108  
         try {
 109  168
             XPath xpath = nav.parseXPath(xpathString);
 110  168
             ContextSupport support = context.getContextSupport();
 111  168
             xpath.setVariableContext( support.getVariableContext() );
 112  168
             xpath.setFunctionContext( support.getFunctionContext() );
 113  168
             xpath.setNamespaceContext( support.getNamespaceContext() );
 114  168
             return xpath.selectNodes( context.duplicate() );
 115  
         }
 116  0
         catch ( org.jaxen.saxpath.SAXPathException e ) {
 117  0
             throw new FunctionCallException(e.toString());
 118  
         }
 119  
     }
 120  
 }
 121