001    // Copyright 2007, 2008, 2011 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    // http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.ioc.internal;
016    
017    import org.apache.tapestry5.ioc.ObjectCreator;
018    import org.apache.tapestry5.ioc.ServiceBuilderResources;
019    import org.apache.tapestry5.ioc.internal.util.InternalUtils;
020    
021    import java.lang.reflect.Constructor;
022    
023    /**
024     * A service creator based on an implementation class' constructor, rather than a service builder method.
025     */
026    public class ConstructorServiceCreator extends AbstractServiceCreator
027    {
028        private final Constructor constructor;
029    
030        public ConstructorServiceCreator(ServiceBuilderResources resources, String creatorDescription,
031                                         Constructor constructor)
032        {
033            super(resources, creatorDescription);
034    
035            this.constructor = constructor;
036        }
037    
038        @Override
039        public String toString()
040        {
041            return creatorDescription;
042        }
043    
044        private ObjectCreator<?> plan;
045    
046        private  ObjectCreator<?> getPlan()
047        {
048            if (plan == null)
049            {
050                String description = String.format("Invoking constructor %s (for service '%s')", creatorDescription, resources.getServiceId());
051    
052                plan = InternalUtils.createConstructorConstructionPlan(resources.getTracker(), resources, createInjectionResources(), logger,
053                        description, constructor);
054            }
055    
056            return plan;
057        }
058    
059        public Object createObject()
060        {
061            return getPlan().createObject();
062        }
063    }