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Java > Open Source Codes > org > apache > tapestry > services > impl > DeferredObjectTranslator


1 // Copyright 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.tapestry.services.impl;
16
17 import org.apache.hivemind.Location;
18 import org.apache.hivemind.internal.Module;
19 import org.apache.hivemind.schema.Translator;
20
21 /**
22  * Service <code>tapestry.DeferredObjectTranslator</code>, which is used to encapsulate the
23  * ObjectTranslator and return {@link org.apache.tapestry.services.impl.DeferredObjectImpl}instances.
24  * These allow the translator to <em>not be executed until (and unless)
25  * the value is needed</em>,
26  * with the added expense that you have to de-referrence the
27  * {@link org.apache.tapestry.services.impl.DeferredObjectImpl}.
28  *
29  * @author Howard M. Lewis Ship
30  * @since 4.0
31  */
32 public class DeferredObjectTranslator implements Translator
33 {
34     private Translator _objectTranslator;
35
36     public Object JavaDoc translate(Module module, Class JavaDoc propertyType, String JavaDoc inputValue, Location location)
37     {
38         return new DeferredObjectImpl(_objectTranslator, module, inputValue, location);
39     }
40
41     public void setObjectTranslator(Translator objectTranslator)
42     {
43         _objectTranslator = objectTranslator;
44     }
45 }
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