1 /**
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. 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 package org.apache.activemq.kaha.impl.data;
18
19 import org.apache.activemq.kaha.StoreLocation;
20
21 /**
22 * A a wrapper for a data in the store
23 *
24 * @version $Revision: 1.2 $
25 */
26 public final class DataItem implements Item, StoreLocation {
27
28 private int file = (int)POSITION_NOT_SET;
29 private long offset = POSITION_NOT_SET;
30 private int size;
31
32 public DataItem() {
33 }
34
35 DataItem(DataItem item) {
36 this.file = item.file;
37 this.offset = item.offset;
38 this.size = item.size;
39 }
40
41 boolean isValid() {
42 return file != POSITION_NOT_SET;
43 }
44
45 /**
46 * @return
47 * @see org.apache.activemq.kaha.StoreLocation#getSize()
48 */
49 public int getSize() {
50 return size;
51 }
52
53 /**
54 * @param size The size to set.
55 */
56 public void setSize(int size) {
57 this.size = size;
58 }
59
60 /**
61 * @return
62 * @see org.apache.activemq.kaha.StoreLocation#getOffset()
63 */
64 public long getOffset() {
65 return offset;
66 }
67
68 /**
69 * @param offset The offset to set.
70 */
71 public void setOffset(long offset) {
72 this.offset = offset;
73 }
74
75 /**
76 * @return
77 * @see org.apache.activemq.kaha.StoreLocation#getFile()
78 */
79 public int getFile() {
80 return file;
81 }
82
83 /**
84 * @param file The file to set.
85 */
86 public void setFile(int file) {
87 this.file = file;
88 }
89
90 /**
91 * @return a pretty print
92 */
93 public String toString() {
94 String result = "offset = " + offset + ", file = " + file + ", size = " + size;
95 return result;
96 }
97
98 public DataItem copy() {
99 return new DataItem(this);
100 }
101 }