org.apache.crunch.types.writable

Class TupleWritable

java.lang.Object

org.apache.crunch.types.writable.TupleWritable

All Implemented Interfaces:

Comparable<TupleWritable>, org.apache.hadoop.io.Writable, org.apache.hadoop.io.WritableComparable<TupleWritable>

public class TupleWritable
extends Object
implements org.apache.hadoop.io.WritableComparable<TupleWritable>

A straight copy of the TupleWritable implementation in the join package, added here because of its package visibility restrictions.

Constructor Summary

Constructors

Constructor and Description
TupleWritable() Create an empty tuple with no allocated storage for writables.
TupleWritable(org.apache.hadoop.io.Writable[] vals) Initialize tuple with storage; unknown whether any of them contain "written" values.

Method Summary

Methods

Modifier and Type	Method and Description
void	clearWritten() Clear any record of which writables have been written to, without releasing storage.
void	clearWritten(int i) Record that the tuple does not contain an element at the position provided.
int	compareTo(TupleWritable o)
boolean	equals(Object other)
org.apache.hadoop.io.Writable	get(int i) Get ith Writable from Tuple.
boolean	has(int i) Return true if tuple has an element at the position provided.
int	hashCode()
void	readFields(DataInput in)
void	setWritten(int i) Record that the tuple contains an element at the position provided.
int	size() The number of children in this Tuple.
String	toString() Convert Tuple to String as in the following.
void	write(DataOutput out) Writes each Writable to out.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

TupleWritable

public TupleWritable()

Create an empty tuple with no allocated storage for writables.

TupleWritable

public TupleWritable(org.apache.hadoop.io.Writable[] vals)

Initialize tuple with storage; unknown whether any of them contain "written" values.

Method Detail

has

public boolean has(int i)

Return true if tuple has an element at the position provided.

get

public org.apache.hadoop.io.Writable get(int i)

Get ith Writable from Tuple.

size

public int size()

The number of children in this Tuple.

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Convert Tuple to String as in the following. [,,...,]

Overrides:

toString in class Object

write

public void write(DataOutput out)
           throws IOException

Writes each Writable to out. TupleWritable format: <count><type1><type2>...<typen><obj1><obj2>...<objn>

Specified by:

write in interface org.apache.hadoop.io.Writable

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Specified by:

readFields in interface org.apache.hadoop.io.Writable

Throws:

IOException

setWritten

public void setWritten(int i)

Record that the tuple contains an element at the position provided.

clearWritten

public void clearWritten(int i)

Record that the tuple does not contain an element at the position provided.

clearWritten

public void clearWritten()

Clear any record of which writables have been written to, without releasing storage.

compareTo

public int compareTo(TupleWritable o)

Specified by:

compareTo in interface Comparable<TupleWritable>