org.datanucleus.store.valuegenerator

Class ValueGenerationBlock<T>

java.lang.Object

org.datanucleus.store.valuegenerator.ValueGenerationBlock<T>

Type Parameters:

T - Type of the value (String, Long etc)

All Implemented Interfaces:

Serializable

public class ValueGenerationBlock<T>
extends Object
implements Serializable

Representation of a block of values.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ValueGenerationBlock(List<T> oid) Constructor.
ValueGenerationBlock(T[] values) Constructor.

Method Summary

Modifier and Type	Method and Description
void	addBlock(ValueGenerationBlock<T> block) Method to append a block onto this block.
T	current() Accessor for the current value.
boolean	hasNext() Accessor for whether there are more values remaining in the block.
T	next() Accessor for the next value, or null if block values exhausted
String	toString() Stringify method.

Methods inherited from class java.lang.Object

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

Constructor Detail

ValueGenerationBlock

public ValueGenerationBlock(T[] values)

Constructor.

Parameters:

values - The block of objects that will be considered the "values"

ValueGenerationBlock

public ValueGenerationBlock(List<T> oid)

Constructor.

Parameters:

oid - The list of objects that will be considered the "values"

Method Detail

current

public T current()

Accessor for the current value.

Returns:

The current value

Throws:

NoSuchElementException - Thrown if no current value

next

public T next()

Accessor for the next value, or null if block values exhausted

Returns:

The next value

hasNext

public boolean hasNext()

Accessor for whether there are more values remaining in the block.

Returns:

True when has more values

addBlock

public void addBlock(ValueGenerationBlock<T> block)

Method to append a block onto this block. This is used where we have some values left, and we want to allocate more to go into this block.

Parameters:

block - The other block

toString

public String toString()

Stringify method.

Overrides:

toString in class Object

Returns:

A string version of this object