Coverage Report - org.apache.tapestry.services.impl.InfrastructureObjectProvider
 
Classes in this File Line Coverage Branch Coverage Complexity
InfrastructureObjectProvider
0%
0/17
0%
0/4
2.25
 
 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.services.impl;
 16  
 
 17  
 import java.util.HashMap;
 18  
 import java.util.Map;
 19  
 
 20  
 import org.apache.hivemind.ErrorLog;
 21  
 import org.apache.hivemind.Location;
 22  
 import org.apache.hivemind.internal.Module;
 23  
 import org.apache.hivemind.service.ObjectProvider;
 24  
 import org.apache.hivemind.util.PropertyUtils;
 25  
 import org.apache.tapestry.services.Infrastructure;
 26  
 
 27  
 /**
 28  
  * An ObjectProvider that streamlines access to the central
 29  
  * {@link org.apache.tapestry.services.Infrastructure}object. The locator for this provider is the
 30  
  * name of a property of the Infrastructure.
 31  
  * 
 32  
  * @author Howard Lewis Ship
 33  
  * @since 4.0
 34  
  */
 35  
 
 36  0
 public class InfrastructureObjectProvider implements ObjectProvider
 37  
 {
 38  
     private ErrorLog _errorLog;
 39  
 
 40  
     private Infrastructure _infrastructure;
 41  
 
 42  0
     private Map _cache = new HashMap();
 43  
 
 44  
     public synchronized Object provideObject(Module contributingModule, Class propertyType,
 45  
             String locator, Location location)
 46  
     {
 47  0
         Object result = _cache.get(locator);
 48  
 
 49  0
         if (result == null)
 50  
         {
 51  0
             result = readProperty(locator, location);
 52  0
             _cache.put(locator, result);
 53  
         }
 54  
 
 55  0
         return result;
 56  
     }
 57  
 
 58  
     Object readProperty(String locator, Location location)
 59  
     {
 60  
         try
 61  
         {            
 62  0
             if (PropertyUtils.isReadable(_infrastructure, locator))
 63  0
                 return PropertyUtils.read(_infrastructure, locator);
 64  
 
 65  0
             return _infrastructure.getProperty(locator);
 66  
         }
 67  0
         catch (Throwable ex)
 68  
         {
 69  0
             _errorLog.error(ImplMessages.unableToReadInfrastructureProperty(
 70  
                     locator,
 71  
                     _infrastructure,
 72  
                     ex), location, ex);
 73  
 
 74  0
             return null;
 75  
         }
 76  
     }
 77  
 
 78  
     public void setErrorLog(ErrorLog errorLog)
 79  
     {
 80  0
         _errorLog = errorLog;
 81  0
     }
 82  
 
 83  
     public void setInfrastructure(Infrastructure infrastructure)
 84  
     {
 85  0
         _infrastructure = infrastructure;
 86  0
     }
 87  
 
 88  
 }