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
015package org.apache.tapestry5.ioc.internal;
016
017import org.apache.tapestry5.commons.ObjectCreator;
018import org.apache.tapestry5.ioc.ServiceBuilderResources;
019import org.apache.tapestry5.ioc.internal.util.InternalUtils;
020
021import java.lang.reflect.Constructor;
022
023/**
024 * A service creator based on an implementation class' constructor, rather than a service builder method.
025 */
026public 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    @Override
060    public Object createObject()
061    {
062        return getPlan().createObject();
063    }
064}