Coverage Report - org.apache.tapestry.script.AbstractToken
 
Classes in this File Line Coverage Branch Coverage Complexity
AbstractToken
0%
0/23
0%
0/8
2.667
 
 1  
 // Copyright 2004, 2005 The Apache Software Foundation
 2  
 //
 3  
 // Licensed under the Apache License, Version 2.0 (the "License");
 4  
 // you may not use this file except in compliance with the License.
 5  
 // You may obtain a copy of the License at
 6  
 //
 7  
 //     http://www.apache.org/licenses/LICENSE-2.0
 8  
 //
 9  
 // Unless required by applicable law or agreed to in writing, software
 10  
 // distributed under the License is distributed on an "AS IS" BASIS,
 11  
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 12  
 // See the License for the specific language governing permissions and
 13  
 // limitations under the License.
 14  
 
 15  
 package org.apache.tapestry.script;
 16  
 
 17  
 import org.apache.hivemind.ApplicationRuntimeException;
 18  
 import org.apache.hivemind.Location;
 19  
 
 20  
 import java.util.ArrayList;
 21  
 import java.util.Iterator;
 22  
 import java.util.List;
 23  
 
 24  
 /**
 25  
  * Base class for creating tokens which may contain other tokens.
 26  
  * 
 27  
  * @author Howard Lewis Ship
 28  
  * @since 0.2.9
 29  
  */
 30  
 
 31  
 abstract class AbstractToken implements IScriptToken
 32  
 {
 33  
     private List _tokens;
 34  
 
 35  
     private Location _location;
 36  
 
 37  
     protected AbstractToken(Location location)
 38  0
     {
 39  0
         _location = location;
 40  0
     }
 41  
 
 42  
     public Location getLocation()
 43  
     {
 44  0
         return _location;
 45  
     }
 46  
 
 47  
     public void addToken(IScriptToken token)
 48  
     {
 49  0
         if (_tokens == null)
 50  0
             _tokens = new ArrayList();
 51  
 
 52  0
         _tokens.add(token);
 53  0
     }
 54  
 
 55  
     /**
 56  
      * Invokes {@link IScriptToken#write(StringBuffer,ScriptSession)}on each child token (if there
 57  
      * are any).
 58  
      */
 59  
 
 60  
     protected void writeChildren(StringBuffer buffer, ScriptSession session)
 61  
     {
 62  0
         if (_tokens == null)
 63  0
             return;
 64  
 
 65  0
         Iterator i = _tokens.iterator();
 66  
 
 67  0
         while (i.hasNext())
 68  
         {
 69  0
             IScriptToken token = (IScriptToken) i.next();
 70  
 
 71  0
             token.write(buffer, session);
 72  0
         }
 73  0
     }
 74  
 
 75  
     /**
 76  
      * Evaluates the expression against the session's symbols, using
 77  
      * {@link org.apache.tapestry.services.ExpressionEvaluator#read(Object, String)} and returns the result.
 78  
      */
 79  
     protected Object evaluate(String expression, ScriptSession session)
 80  
     {
 81  
 
 82  
         try
 83  
         {
 84  0
             return session.evaluate(expression);
 85  
         }
 86  0
         catch (Exception ex)
 87  
         {
 88  0
             throw new ApplicationRuntimeException(ex.getMessage(), _location, ex);
 89  
         }
 90  
     }
 91  
 
 92  
     /**
 93  
      * Evaluates an expression and coerces the result to a boolean.
 94  
      * 
 95  
      * @since 4.0
 96  
      */
 97  
 
 98  
     protected boolean evaluateBoolean(String expression, ScriptSession session)
 99  
     {
 100  
         try
 101  
         {
 102  0
             Boolean b = (Boolean) session.evaluate(expression, Boolean.class);
 103  
 
 104  0
             return b.booleanValue();
 105  
         }
 106  0
         catch (Exception ex)
 107  
         {
 108  0
             throw new ApplicationRuntimeException(ex.getMessage(), _location, ex);
 109  
         }
 110  
     }
 111  
 }