1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 * 19 */ 20 package org.apache.directory.mavibot.btree.serializer; 21 22 23 import java.io.IOException; 24 import java.nio.ByteBuffer; 25 26 import org.apache.directory.mavibot.btree.comparator.ByteComparator; 27 28 29 /** 30 * The Byte serializer. 31 * 32 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 33 */ 34 public class ByteSerializer extends AbstractElementSerializer<Byte> 35 { 36 /** 37 * Create a new instance of ByteSerializer 38 */ 39 public ByteSerializer() 40 { 41 super( new ByteComparator() ); 42 } 43 44 45 /** 46 * {@inheritDoc} 47 */ 48 public byte[] serialize( Byte element ) 49 { 50 byte[] bytes = new byte[1]; 51 52 return serialize( bytes, 0, element ); 53 } 54 55 56 /** 57 * Serialize a byte 58 * 59 * @param value the value to serialize 60 * @return The byte[] containing the serialized byte 61 */ 62 public static byte[] serialize( byte value ) 63 { 64 byte[] bytes = new byte[1]; 65 66 return serialize( bytes, 0, value ); 67 } 68 69 70 /** 71 * Serialize a byte 72 * 73 * @param buffer the Buffer that will contain the serialized value 74 * @param start the position in the buffer we will store the serialized byte 75 * @param value the value to serialize 76 * @return The byte[] containing the serialized byte 77 */ 78 public static byte[] serialize( byte[] buffer, int start, byte value ) 79 { 80 buffer[start] = value; 81 82 return buffer; 83 } 84 85 86 /** 87 * A static method used to deserialize a Byte from a byte array. 88 * @param in The byte array containing the Byte 89 * @return A Byte 90 */ 91 public static Byte deserialize( byte[] in ) 92 { 93 return deserialize( in, 0 ); 94 } 95 96 97 /** 98 * A static method used to deserialize a Byte from a byte array. 99 * @param in The byte array containing the Byte 100 * @param start the position in the byte[] we will deserialize the byte from 101 * @return A Byte 102 */ 103 public static Byte deserialize( byte[] in, int start ) 104 { 105 if ( ( in == null ) || ( in.length < 1 + start ) ) 106 { 107 throw new RuntimeException( "Cannot extract a Byte from a buffer with not enough bytes" ); 108 } 109 110 return in[start]; 111 } 112 113 114 /** 115 * A method used to deserialize a Byte from a byte array. 116 * @param in The byte array containing the Byte 117 * @return A Byte 118 */ 119 public Byte fromBytes( byte[] in ) 120 { 121 return deserialize( in, 0 ); 122 } 123 124 125 /** 126 * A method used to deserialize a Byte from a byte array. 127 * @param in The byte array containing the Byte 128 * @param start the position in the byte[] we will deserialize the byte from 129 * @return A Byte 130 */ 131 public Byte fromBytes( byte[] in, int start ) 132 { 133 if ( ( in == null ) || ( in.length < 1 + start ) ) 134 { 135 throw new RuntimeException( "Cannot extract a Byte from a buffer with not enough bytes" ); 136 } 137 138 return in[start]; 139 } 140 141 142 /** 143 * {@inheritDoc} 144 */ 145 public Byte deserialize( ByteBuffer buffer ) throws IOException 146 { 147 return buffer.get(); 148 } 149 150 151 /** 152 * {@inheritDoc} 153 */ 154 public Byte deserialize( BufferHandler bufferHandler ) throws IOException 155 { 156 byte[] in = bufferHandler.read( 1 ); 157 158 return deserialize( in ); 159 } 160 }