Coverage Report - org.jaxen.expr.DefaultUnionExpr
 
Classes in this File Line Coverage Branch Coverage Complexity
DefaultUnionExpr
95%
20/21
100%
2/2
2.25
 
 1  
 /*
 2  
  * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/expr/DefaultUnionExpr.java,v 1.17 2006/11/30 18:49:27 elharo Exp $
 3  
  * $Revision: 1.17 $
 4  
  * $Date: 2006/11/30 18:49:27 $
 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: DefaultUnionExpr.java,v 1.17 2006/11/30 18:49:27 elharo Exp $
 46  
  */
 47  
 
 48  
 
 49  
 
 50  
 package org.jaxen.expr;
 51  
 
 52  
 import java.util.ArrayList;
 53  
 import java.util.Collections;
 54  
 import java.util.HashSet;
 55  
 import java.util.Iterator;
 56  
 import java.util.List;
 57  
 import java.util.Set;
 58  
 import org.jaxen.Context;
 59  
 import org.jaxen.JaxenException;
 60  
 import org.jaxen.XPathSyntaxException;
 61  
 
 62  
 /**
 63  
  * @deprecated this class will become non-public in the future;
 64  
  *     use the interface instead
 65  
  */
 66  
 public class DefaultUnionExpr extends DefaultBinaryExpr implements UnionExpr
 67  
 {
 68  
     /**
 69  
      * 
 70  
      */
 71  
     private static final long serialVersionUID = 7629142718276852707L;
 72  
 
 73  
     public DefaultUnionExpr(Expr lhs,
 74  
                             Expr rhs)
 75  
     {
 76  40
         super( lhs,
 77  
                rhs );
 78  40
     }
 79  
 
 80  
     public String getOperator()
 81  
     {
 82  12
         return "|";
 83  
     }
 84  
 
 85  
     public String toString()
 86  
     {
 87  0
         return "[(DefaultUnionExpr): " + getLHS() + ", " + getRHS() + "]";
 88  
     }
 89  
 
 90  
     public Object evaluate(Context context) throws JaxenException
 91  
     {
 92  30
         List results = new ArrayList();
 93  
 
 94  
         try {
 95  30
             List lhsResults = (List) getLHS().evaluate( context );
 96  20
             List rhsResults = (List) getRHS().evaluate( context );
 97  
     
 98  18
             Set unique = new HashSet();
 99  
     
 100  18
             results.addAll( lhsResults );
 101  18
             unique.addAll( lhsResults );
 102  
     
 103  18
             Iterator rhsIter = rhsResults.iterator();
 104  
     
 105  56
             while ( rhsIter.hasNext() )
 106  
             {
 107  38
                 Object each = rhsIter.next();
 108  
     
 109  38
                 if ( ! unique.contains( each ) )
 110  
                 {
 111  28
                     results.add( each );
 112  28
                     unique.add( each );
 113  
                 }
 114  38
             }
 115  
             
 116  18
             Collections.sort(results, new NodeComparator(context.getNavigator()));
 117  
     
 118  18
             return results;
 119  
         }
 120  12
         catch (ClassCastException e) {
 121  12
             throw new XPathSyntaxException(this.getText(), context.getPosition(), "Unions are only allowed over node-sets");
 122  
         }
 123  
     }
 124  
     
 125  
 }
 126