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}