[TOC]

org.apache.nutch.crawl

Class MapWritable

    • All Implemented Interfaces:
    • org.apache.hadoop.io.Writable

Deprecated.
Use org.apache.hadoop.io.MapWritable instead.

@Deprecated
public class MapWritable
extends Object
implements org.apache.hadoop.io.Writable

A writable map, with a similar behavior as java.util.HashMap. In addition to the size of key and value writable tuple two additional bytes are stored to identify the Writable classes. This means that a maximum of 255 different class types can be used for key and value objects. A binary-id to class mapping is defined in a static block of this class. However it is possible to use custom implementations of Writable. For these custom Writables we write the byte id - utf class name tuple into the header of each MapWritable that uses these types.

  • Author:
  • Stefan Groschupf

Field Summary

Fields Modifier and Type Field and Description static org.slf4j.Logger LOG Deprecated.

Constructor Summary

Constructors Constructor and Description MapWritable() Deprecated. MapWritable(MapWritable map) Deprecated.

Copy constructor.

Method Summary

Methods Modifier and Type Method and Description void clear() Deprecated. boolean containsKey(org.apache.hadoop.io.Writable key) Deprecated. boolean containsValue(org.apache.hadoop.io.Writable value) Deprecated. boolean equals(Object obj) Deprecated. org.apache.hadoop.io.Writable get(org.apache.hadoop.io.Writable key) Deprecated. int hashCode() Deprecated. boolean isEmpty() Deprecated. Set keySet() Deprecated. org.apache.hadoop.io.Writable put(org.apache.hadoop.io.Writable key, org.apache.hadoop.io.Writable value) Deprecated. void putAll(MapWritable map) Deprecated. void readFields(DataInput in) Deprecated. org.apache.hadoop.io.Writable remove(org.apache.hadoop.io.Writable key) Deprecated. int size() Deprecated. String toString() Deprecated. Collection values() Deprecated. void write(DataOutput out) Deprecated. 

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Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

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LOG

public static final org.slf4j.Logger LOG

Deprecated.

Constructor Detail

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MapWritable

public MapWritable()

Deprecated. 

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MapWritable

public MapWritable(MapWritable map)

Deprecated.

Copy constructor. This constructor makes a deep copy, using serialization / deserialization to break any possible references to contained objects.

  - Parameters:
  - <code>map</code> - map to copy from

Method Detail

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clear

public void clear()

Deprecated. 

-

containsKey

public boolean containsKey(org.apache.hadoop.io.Writable key)

Deprecated. 

-

containsValue

public boolean containsValue(org.apache.hadoop.io.Writable value)

Deprecated. 

-

get

public org.apache.hadoop.io.Writable get(org.apache.hadoop.io.Writable key)

Deprecated. 

-

hashCode

public int hashCode()

Deprecated. 

  - Overrides: 
  - <code>hashCode</code> in class <code>Object</code>        
-

isEmpty

public boolean isEmpty()

Deprecated. 

-

keySet

public Set<org.apache.hadoop.io.Writable> keySet()

Deprecated. 

-

put

public org.apache.hadoop.io.Writable put(org.apache.hadoop.io.Writable key,
                                org.apache.hadoop.io.Writable value)

Deprecated. 

-

putAll

public void putAll(MapWritable map)

Deprecated. 

-

remove

public org.apache.hadoop.io.Writable remove(org.apache.hadoop.io.Writable key)

Deprecated. 

-

size

public int size()

Deprecated. 

-

values

public Collection<org.apache.hadoop.io.Writable> values()

Deprecated. 

-

equals

public boolean equals(Object obj)

Deprecated. 

  - Overrides: 
  - <code>equals</code> in class <code>Object</code>        
-

toString

public String toString()

Deprecated. 

  - Overrides: 
  - <code>toString</code> in class <code>Object</code>        
-

write

public void write(DataOutput out)
           throws IOException

Deprecated. 

  - Specified by: 
  - <code>write</code> in interface <code>org.apache.hadoop.io.Writable</code> 
  - Throws: 
  - <code>IOException</code>       
-

readFields

public void readFields(DataInput in)
                throws IOException

Deprecated. 

  - Specified by: 
  - <code>readFields</code> in interface <code>org.apache.hadoop.io.Writable</code> 
  - Throws: 
  - <code>IOException</code>

Copyright © 2014 The Apache Software Foundation