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}