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Java > Open Source Codes > org > apache > derby > iapi > sql > execute > ConstantAction


1 /*
2
3    Derby - Class org.apache.derby.iapi.sql.execute.ConstantAction
4
5    Licensed to the Apache Software Foundation (ASF) under one or more
6    contributor license agreements. See the NOTICE file distributed with
7    this work for additional information regarding copyright ownership.
8    The ASF licenses this file to you under the Apache License, Version 2.0
9    (the "License"); you may not use this file except in compliance with
10    the License. You may obtain a copy of the License at
11
12       http://www.apache.org/licenses/LICENSE-2.0
13
14    Unless required by applicable law or agreed to in writing, software
15    distributed under the License is distributed on an "AS IS" BASIS,
16    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17    See the License for the specific language governing permissions and
18    limitations under the License.
19
20  */
21
22 package org.apache.derby.iapi.sql.execute;
23
24 import org.apache.derby.iapi.error.StandardException;
25
26 import org.apache.derby.iapi.sql.Activation;
27
28 import org.apache.derby.catalog.UUID;
29
30 /**
31  * This interface describes actions that are ALWAYS performed for a
32  * Statement at Execution time. For instance, it is used for DDL
33  * statements to describe what they should stuff into the catalogs.
34  * <p>
35  * An object satisfying this interface is put into the PreparedStatement
36  * and run at Execution time.
37  *
38  * @author Rick Hillegas
39  */
40
41 public interface ConstantAction
42 {
43     /**
44      * Run the ConstantAction.
45      *
46      * @param activation The execution environment for this constant action.
47      *
48      * @exception StandardException Thrown on failure
49      */
50     public void executeConstantAction( Activation activation )
51                         throws StandardException;
52 }
53
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