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Java > Open Source Codes > org > apache > derby > iapi > types > CloneableObject


1 /*
2
3    Derby - Class org.apache.derby.iapi.types.CloneableObject
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.types;
23
24 /**
25  * This is a simple interface that is used by the
26  * sorter for cloning input rows. It defines
27  * a method that can be used to clone a column.
28  */
29 public interface CloneableObject
30 {
31     /**
32      * Get a shallow copy of the object and return
33      * it. This is used by the sorter to clone
34      * columns. It should be cloning the column
35      * holder but not its value. The only difference
36      * between this method and getClone is this one does
37      * not objectify a stream.
38      *
39      * @return new cloned column as an object
40      */
41     public Object JavaDoc cloneObject();
42 }
43
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