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org.apache.jcs.auxiliary.disk.block.BlockDiskElementDescriptor	59%	88%

1		package org.apache.jcs.auxiliary.disk.block;
2
3		/*
4		* Licensed to the Apache Software Foundation (ASF) under one
5		* or more contributor license agreements. See the NOTICE file
6		* distributed with this work for additional information
7		* regarding copyright ownership. The ASF licenses this file
8		* to you under the Apache License, Version 2.0 (the
9		* "License"); you may not use this file except in compliance
10		* with 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,
15		* software distributed under the License is distributed on an
16		* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17		* KIND, either express or implied. See the License for the
18		* specific language governing permissions and limitations
19		* under the License.
20		*/
21
22		import java.io.Externalizable;
23		import java.io.IOException;
24		import java.io.ObjectInput;
25		import java.io.ObjectOutput;
26		import java.io.Serializable;
27
28		/**
29		* This represents an element on disk. This is used when we persist the keys. We only store the
30		* block addresses in memory. We don't need the length here, since all the blocks are the same size
31		* receyle bin.
32		* <p>
33		* @author Aaron Smuts
34		*/
35	55946	public class BlockDiskElementDescriptor
36		implements Serializable, Externalizable
37		{
38		/** Don't change */
39		private static final long serialVersionUID = -1400659301208101411L;
40
41		/** The key */
42		private Serializable key;
43
44		/** The array of block numbers */
45		private int[] blocks;
46
47		/**
48		* @param key The key to set.
49		*/
50		public void setKey( Serializable key )
51		{
52	22302	this.key = key;
53	22309	}
54
55		/**
56		* @return Returns the key.
57		*/
58		public Serializable getKey()
59		{
60	33649	return key;
61		}
62
63		/**
64		* @param blocks The blocks to set.
65		*/
66		public void setBlocks( int[] blocks )
67		{
68	22321	this.blocks = blocks;
69	22327	}
70
71		/**
72		* This holds the block numbers. An item my be dispersed between multiple blocks.
73		* <p>
74		* @return Returns the blocks.
75		*/
76		public int[] getBlocks()
77		{
78	33649	return blocks;
79		}
80
81		/**
82		* For debugging.
83		* <p>
84		* @return Info on the descriptor.
85		*/
86		public String toString()
87		{
88	0	StringBuffer buf = new StringBuffer();
89	0	buf.append( "\nBlockDiskElementDescriptor" );
90	0	buf.append( "\n key [" + this.getKey() + "]" );
91	0	buf.append( "\n blocks [" );
92	0	if ( this.getBlocks() != null )
93		{
94	0	for ( int i = 0; i < blocks.length; i++ )
95		{
96	0	buf.append( this.getBlocks()[i] );
97		}
98		}
99	0	buf.append( "]" );
100	0	return buf.toString();
101		}
102
103		/**
104		* Saves on reflection.
105		* <p>
106		* (non-Javadoc)
107		* @see java.io.Externalizable#readExternal(java.io.ObjectInput)
108		*/
109		public void readExternal( ObjectInput input )
110		throws IOException, ClassNotFoundException
111		{
112	33649	this.key = (Serializable) input.readObject();
113	33649	this.blocks = (int[]) input.readObject();
114	33649	}
115
116		/**
117		* Saves on reflection.
118		* <p>
119		* (non-Javadoc)
120		* @see java.io.Externalizable#writeExternal(java.io.ObjectOutput)
121		*/
122		public void writeExternal( ObjectOutput output )
123		throws IOException
124		{
125	22366	output.writeObject( this.key );
126	22371	output.writeObject( this.blocks );
127	22377	}
128		}

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