Coverage report

  %line %branch
org.apache.commons.jexl.parser.ASTEmptyFunction
83% 
100% 

 1  
 /*
 2  
  * Copyright 2002-2006 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  
 
 17  
 package org.apache.commons.jexl.parser;
 18  
 
 19  
 import org.apache.commons.jexl.JexlContext;
 20  
 
 21  
 import java.util.Collection;
 22  
 import java.util.Map;
 23  
 
 24  
 /**
 25  
  * function to see if reference doesn't exist in context.
 26  
  * 
 27  
  * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
 28  
  * @author <a href="mailto:tobrien@apache.org">Tim O'Brien</a>
 29  
  * @version $Id: ASTEmptyFunction.java 398190 2006-04-29 16:04:10Z dion $
 30  
  */
 31  
 public class ASTEmptyFunction extends SimpleNode {
 32  
     /**
 33  
      * Create the node given an id.
 34  
      * 
 35  
      * @param id node id.
 36  
      */
 37  
     public ASTEmptyFunction(int id) {
 38  0
         super(id);
 39  0
     }
 40  
 
 41  
     /**
 42  
      * Create a node with the given parser and id.
 43  
      * 
 44  
      * @param p a parser.
 45  
      * @param id node id.
 46  
      */
 47  
     public ASTEmptyFunction(Parser p, int id) {
 48  22
         super(p, id);
 49  22
     }
 50  
 
 51  
     /** {@inheritDoc} */
 52  
     public Object jjtAccept(ParserVisitor visitor, Object data) {
 53  0
         return visitor.visit(this, data);
 54  
     }
 55  
 
 56  
     /** {@inheritDoc} */
 57  
     public Object value(JexlContext jc) throws Exception {
 58  21
         SimpleNode sn = (SimpleNode) jjtGetChild(0);
 59  
 
 60  
         /*
 61  
          * I can't believe this
 62  
          */
 63  
 
 64  21
         Object o = sn.value(jc);
 65  
 
 66  21
         if (o == null) {
 67  3
             return Boolean.TRUE;
 68  
         }
 69  
 
 70  18
         if (o instanceof String && "".equals(o)) {
 71  9
             return Boolean.TRUE;
 72  
         }
 73  
 
 74  9
         if (o.getClass().isArray() && ((Object[]) o).length == 0) {
 75  1
             return Boolean.TRUE;
 76  
         }
 77  
 
 78  8
         if (o instanceof Collection && ((Collection) o).isEmpty()) {
 79  3
             return Boolean.TRUE;
 80  
         }
 81  
 
 82  
         /*
 83  
          * Map isn't a collection
 84  
          */
 85  5
         if (o instanceof Map && ((Map) o).isEmpty()) {
 86  1
             return Boolean.TRUE;
 87  
         }
 88  
 
 89  4
         return Boolean.FALSE;
 90  
     }
 91  
 }

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