Clover coverage report - Code Coverage for hivemind release 1.1-beta-1
Coverage timestamp: Thu Apr 28 2005 19:53:41 EDT
file stats: LOC: 124   Methods: 5
NCLOC: 49   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
BuilderFacet.java 80% 85% 80% 82.9%
coverage coverage
 1   
 // Copyright 2004, 2005 The Apache Software Foundation
 2   
 //
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 // Licensed under the Apache License, Version 2.0 (the "License");
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 // you may not use this file except in compliance with the License.
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 // 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.hivemind.service.impl;
 16   
 
 17   
 import org.apache.commons.logging.Log;
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 import org.apache.hivemind.ServiceImplementationFactoryParameters;
 19   
 import org.apache.hivemind.impl.BaseLocatable;
 20   
 import org.apache.hivemind.util.PropertyUtils;
 21   
 
 22   
 /**
 23   
  * Represents one facet of constructing a service implementation instance. A facet is either a
 24   
  * property to be set on the constructed instance, or a parameter to the instance class'
 25   
  * constructor. Facets are nested properties within
 26   
  * {@link org.apache.hivemind.service.impl.BuilderParameter}, and are used by
 27   
  * {@link org.apache.hivemind.service.impl.BuilderFactory}.
 28   
  * 
 29   
  * @author Howard Lewis Ship
 30   
  */
 31   
 public abstract class BuilderFacet extends BaseLocatable
 32   
 {
 33   
     private String _propertyName;
 34   
 
 35   
     /**
 36   
      * Implemented in subclasses to provide a specific value for the facet (for use as a constructor
 37   
      * parameter, or as a value to set a property to).
 38   
      * 
 39   
      * @param factoryParameters
 40   
      *            the parameters that define the service point and its environment
 41   
      * @param targetType
 42   
      *            the desired property type (extracted from the property type of the property to be
 43   
      *            updated, when a property is known)
 44   
      */
 45   
     public abstract Object getFacetValue(ServiceImplementationFactoryParameters factoryParameters,
 46   
             Class targetType);
 47   
 
 48   
     public abstract boolean isAssignableToType(
 49   
             ServiceImplementationFactoryParameters factoryParameters, Class targetType);
 50   
 
 51  3346
     public String getPropertyName()
 52   
     {
 53  3346
         return _propertyName;
 54   
     }
 55   
 
 56  409
     public void setPropertyName(String string)
 57   
     {
 58  409
         _propertyName = string;
 59   
     }
 60   
 
 61   
     /**
 62   
      * Attempts to autowire a property of the target. This requires that
 63   
      * <ul>
 64   
      * <li>The facet type defines a default property name and facet type
 65   
      * <li>The facet instance does not have a specified property name
 66   
      * <li>The (default) property is writeable
 67   
      * <li>The (default) property is assignable from the facet type
 68   
      * </ul>
 69   
      * If all conditions are met, then the property is updated to the facet value, and the property
 70   
      * name is returned. In all other cases, null is returned.
 71   
      * 
 72   
      * @param target
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      *            The service implementation being constructed
 74   
      * @param factoryParameters
 75   
      *            the parameters that define the service point and its environment
 76   
      */
 77  3346
     public String autowire(Object target, ServiceImplementationFactoryParameters factoryParameters)
 78   
     {
 79  3346
         if (_propertyName != null)
 80  409
             return null;
 81   
 
 82  2937
         String defaultPropertyName = getDefaultPropertyName();
 83   
 
 84  2937
         if (defaultPropertyName == null)
 85  0
             return null;
 86   
 
 87  2937
         if (!PropertyUtils.isWritable(target, defaultPropertyName))
 88  2721
             return null;
 89   
 
 90  216
         Class propertyType = PropertyUtils.getPropertyType(target, defaultPropertyName);
 91   
 
 92  216
         if (isAssignableToType(factoryParameters, propertyType))
 93   
         {
 94  216
             Object facetValue = getFacetValue(factoryParameters, propertyType);
 95   
 
 96  216
             PropertyUtils.write(target, defaultPropertyName, facetValue);
 97   
 
 98  216
             Log log = factoryParameters.getLog();
 99   
 
 100  216
             if (log.isDebugEnabled())
 101  6
                 log.debug("Autowired property " + defaultPropertyName + " to " + facetValue);
 102   
 
 103  216
             return defaultPropertyName;
 104   
         }
 105   
 
 106  0
         return null;
 107   
     }
 108   
 
 109   
     /**
 110   
      * Returns null. Subclasses can provide the default name for a property used by
 111   
      * {@link #autowire(Object, ServiceImplementationFactoryParameters)}.
 112   
      */
 113  0
     protected String getDefaultPropertyName()
 114   
     {
 115  0
         return null;
 116   
     }
 117   
 
 118   
     /** @since 1.1 */
 119  5
     public boolean canAutowireConstructorParameter()
 120   
     {
 121  5
         return false;
 122   
     }
 123   
 
 124   
 }