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Java > Open Source Codes > com > buchuki > ensmer > prevayler > queries > GetObjectDataQuery


1 /*
2  * Copyright 2004 Dusty Phillips
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */

16 package com.buchuki.ensmer.prevayler.queries;
17
18 import java.util.Date JavaDoc;
19 import com.buchuki.ensmer.prevayler.*;
20
21 import org.prevayler.*;
22
23 /**
24  * Query to retrieve theserialized data for an object in the prevayler
25  *
26  * @author Dusty Phillips [dusty@buchuki.com]
27  */

28 public class GetObjectDataQuery implements Query {
29
30     /**
31      * Construct the Query with a reference to the identifier that needs to be
32      * queried.
33      *
34      * @param id the identifier of the object that we wish to retrieve the data
35      * for
36      */

37     public GetObjectDataQuery(long id) {
38         this.id = id;
39     }
40
41     /**
42      * Execute the query
43      *
44      * @param system the EnsmerPrevayler to interact with
45      * @param ignored the date the item is executed, ignored in this case
46      * @return the query's result
47      */

48     public Object JavaDoc query(Object JavaDoc system, Date JavaDoc ignored) {
49         return ((EnsmerPrevayler) system).getObjectPrevayler().getData(id);
50     }
51
52     /**
53      * The identifier of the Object that we want to retrieve the data for.
54      */

55     private long id;
56 }
57
58
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