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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  }