    001//  Copyright 2008, 2010 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.services;
    016
    017import org.apache.tapestry5.ioc.AnnotationProvider;
    018import org.apache.tapestry5.ioc.ObjectLocator;
    019import org.apache.tapestry5.ioc.ObjectProvider;
    020import org.apache.tapestry5.ioc.annotations.Autobuild;
    021
    022/**
    023 * Checks for the {@link org.apache.tapestry5.ioc.annotations.Autobuild} annotation and, if so
    024 * invokes {@link org.apache.tapestry5.ioc.ObjectLocator#autobuild(Class)} on it.
    025 */
    026public class AutobuildObjectProvider implements ObjectProvider
    027{
    028    @Override
    029    public <T> T provide(Class<T> objectType, AnnotationProvider annotationProvider,
    030            ObjectLocator locator)
    031    {
    032        Autobuild annotation = annotationProvider.getAnnotation(Autobuild.class);
    033
    034        if (annotation != null)
    035            return locator
    036                    .autobuild("Autobuilding instance of " + objectType.getName(), objectType);
    037
    038        return null;
    039    }
    040}