001// Copyright 2005 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.tapestry.services.impl; 016 017import org.apache.hivemind.Location; 018import org.apache.hivemind.internal.Module; 019import org.apache.hivemind.schema.Translator; 020 021/** 022 * Service <code>tapestry.DeferredObjectTranslator</code>, which is used to encapsulate the 023 * ObjectTranslator and return {@link org.apache.tapestry.services.impl.DeferredObjectImpl}instances. 024 * These allow the translator to <em>not be executed until (and unless) 025 * the value is needed</em>, 026 * with the added expense that you have to de-referrence the 027 * {@link org.apache.tapestry.services.impl.DeferredObjectImpl}. 028 * 029 * @author Howard M. Lewis Ship 030 * @since 4.0 031 */ 032public class DeferredObjectTranslator implements Translator 033{ 034 private Translator _objectTranslator; 035 036 public Object translate(Module module, Class propertyType, String inputValue, Location location) 037 { 038 return new DeferredObjectImpl(_objectTranslator, module, inputValue, location); 039 } 040 041 public void setObjectTranslator(Translator objectTranslator) 042 { 043 _objectTranslator = objectTranslator; 044 } 045}