org.apache.pig.data

Class UnlimitedNullTuple

java.lang.Object

org.apache.pig.data.AbstractTuple

org.apache.pig.data.UnlimitedNullTuple

All Implemented Interfaces:

Serializable, Comparable, Iterable<Object>, org.apache.hadoop.io.Writable, org.apache.hadoop.io.WritableComparable, Tuple

public class UnlimitedNullTuple
extends AbstractTuple

See Also:

Serialized Form

Field Summary

Fields inherited from interface org.apache.pig.data.Tuple

NOTNULL, NULL

Constructor Summary

Constructors

Constructor and Description
UnlimitedNullTuple()

Method Summary

Methods

Modifier and Type	Method and Description
void	append(Object val) Append a field to a tuple.
int	compareTo(Object o)
Object	get(int fieldNum) Get the value in a given field.
List<Object>	getAll() Get all of the fields in the tuple as a list.
long	getMemorySize() Determine the size of tuple in memory.
void	readFields(DataInput arg0)
void	set(int fieldNum, Object val) Set the value in a given field.
int	size() Find the size of the tuple.
void	write(DataOutput arg0)

Methods inherited from class org.apache.pig.data.AbstractTuple

equals, getType, isNull, iterator, reference, toDelimitedString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

UnlimitedNullTuple

public UnlimitedNullTuple()

Method Detail

size

public int size()

Description copied from interface: Tuple

Find the size of the tuple. Used to be called arity().

Returns:

number of fields in the tuple.

get

public Object get(int fieldNum)
           throws ExecException

Description copied from interface: Tuple

Get the value in a given field.

Parameters:

fieldNum - Number of the field to get the value for.

Returns:

value, as an Object.

Throws:

ExecException - if the field number is greater than or equal to the number of fields in the tuple.

getAll

public List<Object> getAll()

Description copied from interface: Tuple

Get all of the fields in the tuple as a list.

Returns:

a list of objects containing the fields of the tuple in order.

set

public void set(int fieldNum,
       Object val)
         throws ExecException

Description copied from interface: Tuple

Set the value in a given field. This should not be called unless the tuple was constructed by TupleFactory.newTuple(int) with an argument greater than the fieldNum being passed here. This call will not automatically expand the tuple size. That is if you called TupleFactory.newTuple(int) with a 2, it is okay to call this function with a 1, but not with a 2 or greater.

Parameters:

fieldNum - Number of the field to set the value for.

val - Object to put in the indicated field.

Throws:

ExecException - if the field number is greater than or equal to the number of fields in the tuple.

append

public void append(Object val)

Description copied from interface: Tuple

Append a field to a tuple. This method is not efficient as it may force copying of existing data in order to grow the data structure. Whenever possible you should construct your Tuple with TupleFactory.newTuple(int) and then fill in the values with Tuple.set(int, Object), rather than construct it with TupleFactory.newTuple() and append values.

Parameters:

val - Object to append to the tuple.

getMemorySize

public long getMemorySize()

Description copied from interface: Tuple

Determine the size of tuple in memory. This is used by data bags to determine their memory size. This need not be exact, but it should be a decent estimation.

Returns:

estimated memory size, in bytes.

readFields

public void readFields(DataInput arg0)
                throws IOException

Throws:

IOException

write

public void write(DataOutput arg0)
           throws IOException

Throws:

IOException

compareTo

public int compareTo(Object o)