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Java > Open Source Codes > org > apache > derby > iapi > store > raw > D_RowLock


1 /*
2
3    Derby - Class org.apache.derby.iapi.store.raw.D_RowLock
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.store.raw;
23
24 import org.apache.derby.iapi.services.diag.Diagnosticable;
25 import org.apache.derby.iapi.services.diag.DiagnosticableGeneric;
26 import org.apache.derby.iapi.services.diag.DiagnosticUtil;
27
28 import org.apache.derby.iapi.error.StandardException;
29
30 /**
31
32 The D_RowLock class provides diagnostic information about the
33 RowLock qualifer, and is used for output in lock debugging.
34
35 **/
36
37 public class D_RowLock extends DiagnosticableGeneric
38 {
39     // Names of locks for lock trace print out.
40 private static String JavaDoc[] names = { "RS2", "RS3", "RU2", "RU3", "RIP", "RI", "RX2", "RX3" };
41
42     /**
43         Return the string for the qualifier.
44      *
45      * @exception StandardException Standard Cloudscape error policy
46      **/
47     public String JavaDoc diag()
48         throws StandardException
49     {
50         RowLock mode = (RowLock) diag_object;
51
52         return(names[mode.getType()]);
53     }
54 }
55
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