1 /***
2 *
3 * Copyright 2004 Hiram Chirino
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 **/
18 package org.codehaus.activemq.journal.howl;
19
20 import org.codehaus.activemq.journal.RecordLocation;
21
22 /***
23 * Provides a RecordLocation implementation for the long based
24 * location pointers that HOWL uses.
25 *
26 * @version $Revision: 1.1 $
27 */
28 public class LongRecordLocation implements RecordLocation {
29
30 final private long location;
31
32 public LongRecordLocation(long l) {
33 this.location = l;
34 }
35
36 /***
37 * @see java.lang.Comparable#compareTo(java.lang.Object)
38 */
39 public int compareTo(Object o) {
40 return (int) (location - ((LongRecordLocation) o).location);
41 }
42
43 /***
44 * @return the original long location provided by HOWL
45 */
46 public long getLongLocation() {
47 return location;
48 }
49
50 /***
51 * @see java.lang.Object#hashCode()
52 */
53 public int hashCode() {
54 int lowPart = (int) (0xFFFFFFFF & location);
55 int highPart = (int) (0xFFFFFFFF & (location >> 4));
56 return lowPart ^ highPart;
57 }
58
59 /***
60 * @see java.lang.Object#equals(java.lang.Object)
61 */
62 public boolean equals(Object o) {
63 if (o == null || o.getClass() != LongRecordLocation.class)
64 return false;
65 return ((LongRecordLocation) o).location == location;
66 }
67
68 /***
69 * @see java.lang.Object#toString()
70 */
71 public String toString() {
72 return "0x" + Long.toHexString(location);
73 }
74 }