001// Copyright 2010, 2011 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.services; 016 017import org.apache.tapestry5.ComponentResources; 018 019/** 020 * An object used to provide a value of a specific type to a component (represented by an 021 * instance of {@link ComponentResources}). The provider will create and return the value 022 * (some providers may be smart enough to cache a value, but should be implemented in 023 * a thread-safe manner). Often the provider is an inner class of a {@link ComponentClassTransformWorker}. 024 * 025 * @param <T> 026 * type of object provided 027 * @since 5.2.0 028 * @deprecated Deprecated in 5.3, using Plastic equivalents 029 * @see org.apache.tapestry5.plastic.PlasticField 030 * @see org.apache.tapestry5.plastic.ComputedValue 031 */ 032@SuppressWarnings("deprecation") 033public interface ComponentValueProvider<T> 034{ 035 /** 036 * Provide the object for the indicated component. 037 * 038 * @param resources 039 * Identifies the component 040 * @return the object 041 */ 042 T get(ComponentResources resources); 043}