oracle.jbo.common
Class SparseArrayImpl

java.lang.Object
  oracle.jbo.common.SparseArrayImpl

Direct Known Subclasses:

SparseArray

public class SparseArrayImpl
extends java.lang.Object

The SparseArrayImpl represents Data from the datastore along with a flag whether data exists in a particular index into the array or not. This Array is designed for arrays that have small numbers of elements with a medium (200-400) spread on the indices. This array doesn't shrink the storage as tail-elements are removed because it assumes that the spread isn't very large.

Only ready only access is allowed to data within this class-instance.

Constructor Summary

SparseArrayImpl(int length)

Method Summary

void	clear(int index)
java.lang.Object	get(int index) Get the value at the specified index.
boolean	isEmpty()
boolean	isPopulated(int index) Is the slot populated.
int	length()
void	set(int index, java.lang.Object value) Set a value at a given index.
SparseArrayImpl	toSparseArrayImpl()
java.lang.String	toString() Default call, return at most ten entries.
java.lang.String	toString(int maxEntries) For debugging, returns a string representation of the SparseArrayImpl in the form {Object[i],...} with an upperlimit of maxEnties in the list (zero for all entries) Only place the ellipsis if entries are omitted.

Methods inherited from class java.lang.Object

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

Constructor Detail

SparseArrayImpl

public SparseArrayImpl(int length)

Method Detail

length

public int length()

get

public java.lang.Object get(int index)

Get the value at the specified index.

Returns:

value at given index

set

public void set(int index,
                java.lang.Object value)

Set a value at a given index.

Parameters:

index - a 0-based index into the slots.

value - the value to set into the slot.

isPopulated

public boolean isPopulated(int index)

Is the slot populated.

Returns:

True if there is a value at the given index.

clear

public void clear(int index)

toString

public java.lang.String toString(int maxEntries)

For debugging, returns a string representation of the SparseArrayImpl in the form {Object[i],...} with an upperlimit of maxEnties in the list (zero for all entries) Only place the ellipsis if entries are omitted.

toString

public java.lang.String toString()

Default call, return at most ten entries.

Overrides:

toString in class java.lang.Object

isEmpty

public boolean isEmpty()

toSparseArrayImpl

public SparseArrayImpl toSparseArrayImpl()