Coverage report

  %line %branch
org.apache.commons.jexl.parser.ASTReference
60% 
88% 

 1  
 /*
 2  
  * Copyright 2002,2004 The Apache Software Foundation.
 3  
  * 
 4  
  * Licensed under the Apache License, Version 2.0 (the "License");
 5  
  * you may not use this file except in compliance with the License.
 6  
  * You may obtain a copy of the License at
 7  
  * 
 8  
  *      http://www.apache.org/licenses/LICENSE-2.0
 9  
  * 
 10  
  * Unless required by applicable law or agreed to in writing, software
 11  
  * distributed under the License is distributed on an "AS IS" BASIS,
 12  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 13  
  * See the License for the specific language governing permissions and
 14  
  * limitations under the License.
 15  
  */
 16  
 package org.apache.commons.jexl.parser;
 17  
 
 18  
 import org.apache.commons.jexl.JexlContext;
 19  
 
 20  
 /**
 21  
  *  reference - any variable expression
 22  
  *
 23  
  *  @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
 24  
  *  @version $Id: ASTReference.java,v 1.4 2004/09/01 00:35:38 dion Exp $
 25  
  */
 26  
 public class ASTReference extends SimpleNode
 27  
 {
 28  
     SimpleNode root;
 29  
 
 30  
     public ASTReference(int id)
 31  
     {
 32  0
         super(id);
 33  0
     }
 34  
 
 35  
     public ASTReference(Parser p, int id)
 36  
     {
 37  2937
         super(p, id);
 38  2937
     }
 39  
 
 40  
 
 41  
     /** Accept the visitor. **/
 42  
     public Object jjtAccept(ParserVisitor visitor, Object data)
 43  
     {
 44  0
         return visitor.visit(this, data);
 45  
     }
 46  
 
 47  
     public Object value(JexlContext jc)
 48  
         throws Exception
 49  
     {
 50  2796
         return  execute(null,jc);
 51  
     }
 52  
 
 53  
     public void jjtClose()
 54  
     {
 55  2922
         root = (SimpleNode) jjtGetChild(0);
 56  2922
     }
 57  
 
 58  
     public Object execute(Object obj, JexlContext jc)
 59  
              throws Exception
 60  
      {
 61  2796
          Object o = root.value(jc);
 62  
 
 63  
          /*
 64  
           * ignore the first child - it's our identifier
 65  
           */
 66  3777
          for(int i=1; i<jjtGetNumChildren(); i++)
 67  
          {
 68  1023
              o = ( (SimpleNode) jjtGetChild(i)).execute(o,jc);
 69  
 
 70  558
              // check for a variable in the context named
 71  27
              // child0.child1.child2 etc
 72  450
              if(o == null) {
 73  90
                  String varName = getIdentifierToDepth(i);
 74  1710
                  o = jc.getVars().get(varName);
 75  
              }
 76  
          }
 77  
 
 78  1134
          return o;
 79  
      }
 80  
 
 81  
     /**
 82  
      * This method returns a variable from this identifier and
 83  
      * it's children. For an expression like 'a.b.c', a is child
 84  
      * zero, b is child 1 and c is child 2.
 85  
      *  
 86  
      * @param i the depth of the child nodes to go to
 87  
      * @return the a dotted variable from this identifier and it's
 88  
      *    child nodes.
 89  
      */
 90  
     private String getIdentifierToDepth(int i) {
 91  90
         StringBuffer varName = new StringBuffer();
 92  312
          for (int j = 0; j <=i; j++) {
 93  222
              SimpleNode node = (SimpleNode) jjtGetChild(j);
 94  222
              if (node instanceof ASTIdentclass="keyword">ifier) {
 95  222
                varName.append(((ASTIdentifier)node).getIdentifierString());
 96  222
                if (j != i) varName.append('.');
 97  
              }
 98  
          }
 99  90
         return varName.toString();
 100  
     }
 101  
 
 102  
     public String getRootString()
 103  
         throws Exception
 104  
     {
 105  0
         if ( root instanceof ASTIdentclass="keyword">ifier)
 106  0
             return ((ASTIdentifier) root).getIdentifierString();
 107  
 
 108  0
         if (root instanceof ASTArrayAccess)
 109  0
             return ((ASTArrayAccess) root).getIdentifierString();
 110  
 
 111  0
         throw new Exception("programmer error : ASTReference : root not known"
 112  
                     + root );
 113  
     }
 114  
 }

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