    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    }