    001//  Copyright 2008, 2012 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.util;
    016
    017import java.lang.reflect.Type;
    018
    019/**
    020 * Chain of command for InjectionDefaultProvider.
    021 */
    022public class DelegatingInjectionResources implements InjectionResources
    023{
    024    private final InjectionResources first;
    025    private final InjectionResources next;
    026
    027    public DelegatingInjectionResources(InjectionResources first,
    028                                        InjectionResources next)
    029    {
    030        this.first = first;
    031        this.next = next;
    032    }
    033
    034    @Override
    035    public <T> T findResource(Class<T> type, Type genericType)
    036    {
    037        T result = first.findResource(type, genericType);
    038
    039        return result != null ? result : next.findResource(type, genericType);
    040    }
    041}