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    
015    package org.apache.tapestry5.ioc.internal.util;
016    
017    import 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 id, logger or service interface class.
023     */
024    public 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    }