Coverage Report - org.apache.tapestry.binding.StateBinding
 
Classes in this File Line Coverage Branch Coverage Complexity
StateBinding
0%
0/11
0%
0/2
2.333
 
 1  
 // Copyright 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.binding;
 16  
 
 17  
 import org.apache.hivemind.ApplicationRuntimeException;
 18  
 import org.apache.hivemind.Location;
 19  
 import org.apache.hivemind.util.Defense;
 20  
 import org.apache.tapestry.coerce.ValueConverter;
 21  
 import org.apache.tapestry.engine.state.ApplicationStateManager;
 22  
 
 23  
 /**
 24  
  * Binding used to efficiently query whether an application state object (visit, global and friends)
 25  
  * exists without actually creating it (or creating a session).
 26  
  * 
 27  
  * @author Howard M. Lewis Ship
 28  
  * @since 4.0
 29  
  */
 30  
 public class StateBinding extends AbstractBinding
 31  
 {
 32  
     private final ApplicationStateManager _applicationStateManager;
 33  
 
 34  
     private final String _objectName;
 35  
 
 36  
     public StateBinding(String description, ValueConverter valueConverter, Location location,
 37  
             ApplicationStateManager applicationStateManager, String objectName)
 38  
     {
 39  0
         super(description, valueConverter, location);
 40  
 
 41  0
         Defense.notNull(applicationStateManager, "applicationStateManager");
 42  0
         Defense.notNull(objectName, "objectName");
 43  
 
 44  0
         _applicationStateManager = applicationStateManager;
 45  0
         _objectName = objectName;
 46  0
     }
 47  
 
 48  
     /**
 49  
      * Returns false; these ASO objects can be created at any time.
 50  
      */
 51  
     public boolean isInvariant()
 52  
     {
 53  0
         return false;
 54  
     }
 55  
 
 56  
     public Object getObject()
 57  
     {
 58  
         try
 59  
         {
 60  0
             boolean exists = _applicationStateManager.exists(_objectName);
 61  
 
 62  0
             return exists ? Boolean.TRUE : Boolean.FALSE;
 63  
         }
 64  0
         catch (Exception ex)
 65  
         {
 66  0
             throw new ApplicationRuntimeException(ex.getMessage(), getLocation(), ex);
 67  
         }
 68  
     }
 69  
 }