001//  Copyright 2008 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 * Provides for the injection of specific types of values as <em>resources</em> as opposed to services or objects
021 * obtained from {@link org.apache.tapestry5.ioc.services.MasterObjectProvider}. This includes values such as a
022 * service's logger, service interface class, or {@link org.apache.tapestry5.ioc.ServiceResources}.
023 */
024public interface InjectionResources
025{
026    /**
027     * Given the field type, provide the matching resource value, or null.
028     *
029     * @param type        type of field or parameter
030     * @param genericType generic type information associated with field or parameter
031     * @return the  corresponding value, or null
032     */
033    <T> T findResource(Class<T> type, Type genericType);
034}