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7 | org.apache.hadoop.io.serializer (Hadoop 0.20.1 API) |
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81 | <HR> |
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82 | <H2> |
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83 | Package org.apache.hadoop.io.serializer |
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84 | </H2> |
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85 | |
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86 | This package provides a mechanism for using different serialization frameworks |
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87 | in Hadoop. |
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88 | <P> |
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89 | <B>See:</B> |
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90 | <BR> |
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91 | <A HREF="#package_description"><B>Description</B></A> |
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92 | <P> |
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97 | <B>Interface Summary</B></FONT></TH> |
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98 | </TR> |
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99 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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100 | <TD WIDTH="15%"><B><A HREF="../../../../../org/apache/hadoop/io/serializer/Deserializer.html" title="interface in org.apache.hadoop.io.serializer">Deserializer<T></A></B></TD> |
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101 | <TD> |
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102 | Provides a facility for deserializing objects of type <T> from an |
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103 | <A HREF="http://java.sun.com/javase/6/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io"><CODE>InputStream</CODE></A>.</TD> |
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104 | </TR> |
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105 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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106 | <TD WIDTH="15%"><B><A HREF="../../../../../org/apache/hadoop/io/serializer/Serialization.html" title="interface in org.apache.hadoop.io.serializer">Serialization<T></A></B></TD> |
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107 | <TD> |
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108 | Encapsulates a <A HREF="../../../../../org/apache/hadoop/io/serializer/Serializer.html" title="interface in org.apache.hadoop.io.serializer"><CODE>Serializer</CODE></A>/<A HREF="../../../../../org/apache/hadoop/io/serializer/Deserializer.html" title="interface in org.apache.hadoop.io.serializer"><CODE>Deserializer</CODE></A> pair.</TD> |
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109 | </TR> |
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110 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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111 | <TD WIDTH="15%"><B><A HREF="../../../../../org/apache/hadoop/io/serializer/Serializer.html" title="interface in org.apache.hadoop.io.serializer">Serializer<T></A></B></TD> |
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112 | <TD> |
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113 | Provides a facility for serializing objects of type <T> to an |
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114 | <A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io"><CODE>OutputStream</CODE></A>.</TD> |
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124 | <B>Class Summary</B></FONT></TH> |
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125 | </TR> |
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126 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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127 | <TD WIDTH="15%"><B><A HREF="../../../../../org/apache/hadoop/io/serializer/DeserializerComparator.html" title="class in org.apache.hadoop.io.serializer">DeserializerComparator<T></A></B></TD> |
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128 | <TD> |
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129 | A <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><CODE>RawComparator</CODE></A> that uses a <A HREF="../../../../../org/apache/hadoop/io/serializer/Deserializer.html" title="interface in org.apache.hadoop.io.serializer"><CODE>Deserializer</CODE></A> to deserialize |
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130 | the objects to be compared so that the standard <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Comparator.html?is-external=true" title="class or interface in java.util"><CODE>Comparator</CODE></A> can |
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131 | be used to compare them.</TD> |
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132 | </TR> |
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133 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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134 | <TD WIDTH="15%"><B><A HREF="../../../../../org/apache/hadoop/io/serializer/JavaSerialization.html" title="class in org.apache.hadoop.io.serializer">JavaSerialization</A></B></TD> |
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135 | <TD> |
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136 | An experimental <A HREF="../../../../../org/apache/hadoop/io/serializer/Serialization.html" title="interface in org.apache.hadoop.io.serializer"><CODE>Serialization</CODE></A> for Java <A HREF="http://java.sun.com/javase/6/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io"><CODE>Serializable</CODE></A> classes.</TD> |
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137 | </TR> |
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138 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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139 | <TD WIDTH="15%"><B><A HREF="../../../../../org/apache/hadoop/io/serializer/JavaSerializationComparator.html" title="class in org.apache.hadoop.io.serializer">JavaSerializationComparator<T extends Serializable & Comparable<T>></A></B></TD> |
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140 | <TD> |
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141 | A <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><CODE>RawComparator</CODE></A> that uses a <A HREF="../../../../../org/apache/hadoop/io/serializer/JavaSerialization.html" title="class in org.apache.hadoop.io.serializer"><CODE>JavaSerialization</CODE></A> |
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142 | <A HREF="../../../../../org/apache/hadoop/io/serializer/Deserializer.html" title="interface in org.apache.hadoop.io.serializer"><CODE>Deserializer</CODE></A> to deserialize objects that are then compared via |
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143 | their <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang"><CODE>Comparable</CODE></A> interfaces.</TD> |
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144 | </TR> |
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146 | <TD WIDTH="15%"><B><A HREF="../../../../../org/apache/hadoop/io/serializer/SerializationFactory.html" title="class in org.apache.hadoop.io.serializer">SerializationFactory</A></B></TD> |
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147 | <TD> |
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148 | A factory for <A HREF="../../../../../org/apache/hadoop/io/serializer/Serialization.html" title="interface in org.apache.hadoop.io.serializer"><CODE>Serialization</CODE></A>s.</TD> |
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149 | </TR> |
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150 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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151 | <TD WIDTH="15%"><B><A HREF="../../../../../org/apache/hadoop/io/serializer/WritableSerialization.html" title="class in org.apache.hadoop.io.serializer">WritableSerialization</A></B></TD> |
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152 | <TD>A <A HREF="../../../../../org/apache/hadoop/io/serializer/Serialization.html" title="interface in org.apache.hadoop.io.serializer"><CODE>Serialization</CODE></A> for <A HREF="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io"><CODE>Writable</CODE></A>s that delegates to |
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153 | <A HREF="../../../../../org/apache/hadoop/io/Writable.html#write(java.io.DataOutput)"><CODE>Writable.write(java.io.DataOutput)</CODE></A> and |
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157 | |
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158 | |
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159 | <P> |
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160 | <A NAME="package_description"><!-- --></A><H2> |
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161 | Package org.apache.hadoop.io.serializer Description |
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162 | </H2> |
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163 | |
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164 | <P> |
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165 | <p> |
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166 | This package provides a mechanism for using different serialization frameworks |
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167 | in Hadoop. The property "io.serializations" defines a list of |
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168 | <A HREF="../../../../../org/apache/hadoop/io/serializer/Serialization.html" title="interface in org.apache.hadoop.io.serializer"><CODE>Serialization</CODE></A>s that know how to create |
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169 | <A HREF="../../../../../org/apache/hadoop/io/serializer/Serializer.html" title="interface in org.apache.hadoop.io.serializer"><CODE>Serializer</CODE></A>s and |
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170 | <A HREF="../../../../../org/apache/hadoop/io/serializer/Deserializer.html" title="interface in org.apache.hadoop.io.serializer"><CODE>Deserializer</CODE></A>s. |
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171 | </p> |
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172 | |
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173 | <p> |
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174 | To add a new serialization framework write an implementation of |
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175 | <A HREF="../../../../../org/apache/hadoop/io/serializer/Serialization.html" title="interface in org.apache.hadoop.io.serializer"><CODE>Serialization</CODE></A> and add its name to the |
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176 | "io.serializations" property. |
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177 | </p> |
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