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20 package org.apache.directory.mavibot.btree.serializer;
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23 import java.io.IOException;
24 import java.nio.ByteBuffer;
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26 import org.apache.directory.mavibot.btree.comparator.ShortComparator;
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34 public class ShortSerializer extends AbstractElementSerializer<Short>
35 {
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39 public ShortSerializer()
40 {
41 super( new ShortComparator() );
42 }
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48 public byte[] serialize( Short element )
49 {
50 byte[] bytes = new byte[2];
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52 return serialize( bytes, 0, element );
53 }
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62 public static byte[] serialize( short value )
63 {
64 byte[] bytes = new byte[2];
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66 return serialize( bytes, 0, value );
67 }
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78 public static byte[] serialize( byte[] buffer, int start, short value )
79 {
80 buffer[start] = ( byte ) ( value >>> 8 );
81 buffer[start + 1] = ( byte ) ( value );
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83 return buffer;
84 }
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92 public static Short deserialize( byte[] in )
93 {
94 return deserialize( in, 0 );
95 }
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104 public static Short deserialize( byte[] in, int start )
105 {
106 if ( ( in == null ) || ( in.length < 2 + start ) )
107 {
108 throw new RuntimeException( "Cannot extract a Short from a buffer with not enough bytes" );
109 }
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111 return ( short ) ( ( in[start] << 8 ) + ( in[start + 1] & 0xFF ) );
112 }
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120 public Short fromBytes( byte[] in )
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122 return deserialize( in, 0 );
123 }
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132 public Short fromBytes( byte[] in, int start )
133 {
134 if ( ( in == null ) || ( in.length < 2 + start ) )
135 {
136 throw new RuntimeException( "Cannot extract a Short from a buffer with not enough bytes" );
137 }
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139 return ( short ) ( ( in[start] << 8 ) + ( in[start + 1] & 0xFF ) );
140 }
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146 public Short deserialize( ByteBuffer buffer ) throws IOException
147 {
148 return buffer.getShort();
149 }
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155 public Short deserialize( BufferHandler bufferHandler ) throws IOException
156 {
157 byte[] in = bufferHandler.read( 2 );
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159 return deserialize( in );
160 }
161 }