001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.activemq.kaha.impl.data; 018 019 import org.apache.activemq.kaha.StoreLocation; 020 021 /** 022 * A a wrapper for a data in the store 023 * 024 * 025 */ 026 public final class DataItem implements Item, StoreLocation { 027 028 private int file = (int)POSITION_NOT_SET; 029 private long offset = POSITION_NOT_SET; 030 private int size; 031 032 public DataItem() { 033 } 034 035 DataItem(DataItem item) { 036 this.file = item.file; 037 this.offset = item.offset; 038 this.size = item.size; 039 } 040 041 boolean isValid() { 042 return file != POSITION_NOT_SET; 043 } 044 045 /** 046 * @return 047 * @see org.apache.activemq.kaha.StoreLocation#getSize() 048 */ 049 public int getSize() { 050 return size; 051 } 052 053 /** 054 * @param size The size to set. 055 */ 056 public void setSize(int size) { 057 this.size = size; 058 } 059 060 /** 061 * @return 062 * @see org.apache.activemq.kaha.StoreLocation#getOffset() 063 */ 064 public long getOffset() { 065 return offset; 066 } 067 068 /** 069 * @param offset The offset to set. 070 */ 071 public void setOffset(long offset) { 072 this.offset = offset; 073 } 074 075 /** 076 * @return 077 * @see org.apache.activemq.kaha.StoreLocation#getFile() 078 */ 079 public int getFile() { 080 return file; 081 } 082 083 /** 084 * @param file The file to set. 085 */ 086 public void setFile(int file) { 087 this.file = file; 088 } 089 090 /** 091 * @return a pretty print 092 */ 093 public String toString() { 094 String result = "offset = " + offset + ", file = " + file + ", size = " + size; 095 return result; 096 } 097 098 public DataItem copy() { 099 return new DataItem(this); 100 } 101 }