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Java > Open Source Codes > scriptella > driver > jexl > Query


1 /*
2  * Copyright 2006-2007 The Scriptella Project Team.
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 scriptella.driver.jexl;
17
18 import scriptella.spi.QueryCallback;
19
20 /**
21  * Represents a context available in <query/> element.
22  *
23  * @author Fyodor Kupolov
24  * @version 1.0
25  * @since 12.01.2007
26  */

27 public class Query {
28     private QueryCallback callback;
29     private JexlContextMap map;
30
31
32     /**
33      * Creates a query context variable.
34      * @param callback callback to notify about rows iteration.
35      * @param map parameters callback including local variables set by current row.
36      */

37     public Query(QueryCallback callback, JexlContextMap map) {
38         this.callback = callback;
39         this.map = map;
40     }
41
42     /**
43      * Executes nested elements and exposes local variables set by this
44      * query. In other words a virtual row is produced.
45      */

46     public void next() {
47         callback.processRow(map);
48     }
49 }
50
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