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com.tangosol.util
Class SimpleLongArray

java.lang.Object
com.tangosol.util.Base
com.tangosol.util.AbstractLongArray
com.tangosol.util.SimpleLongArray

All Implemented Interfaces:

LongArray, Serializable, Cloneable

public class SimpleLongArray

extends AbstractLongArray

implements Serializable

An implementation of LongArray that stores values in an array, thus is actually an "IntArray". Optimized for 0-based arrays. Null values are not considered to be entries, thus will not affect "first" and "last" and will not show up in the iterator. Note: not designed to be thread safe.

Version:

1.00 2003.04.09

Author:

cp

Nested Class Summary

class

SimpleLongArray.Iterator An Iterator that adds a "current element" concept, similar to the Map.Entry interface.

Field Summary

static Object[]	EMPTY Empty array of objects.
static long	MAX Maximum index value.

Fields inherited from interface com.tangosol.util.LongArray

NOT_FOUND

Constructor Summary

SimpleLongArray()
Construct an empty SimpleLongArray.

Method Summary

long	add(Object oValue) Add the passed element value to the LongArray and return the index at which the element value was stored.
void	clear() Remove all nodes from the LongArray.
Object	clone() Make a clone of the LongArray.
boolean	contains(Object oValue) Determine if the LongArray contains the specified element.
boolean	exists(long lIndex) Determine if the specified index is in use.
Object	get(long lIndex) Return the value stored at the specified index.
long	getFirstIndex() Determine the first index that exists in the LongArray.
long	getLastIndex() Determine the last index that exists in the LongArray.
int	getSize() Determine the size of the LongArray.
long	indexOf(Object oValue, long lIndex) Return the index in this LongArray of the first occurrence of the specified element such that (index >= lIndex), or NOT_FOUND if this LongArray does not contain the specified element.
boolean	isEmpty() Test for empty LongArray.
LongArray.Iterator	iterator() Obtain a LongArray.Iterator of the contents of the LongArray.
LongArray.Iterator	iterator(long lIndex) Obtain a LongArray.Iterator of the contents of the LongArray, starting at a particular index such that the first call to next will set the location of the iterator at the first existent index that is greater than or equal to the specified index, or will throw a NoSuchElementException if there is no such existent index.
long	lastIndexOf(Object oValue, long lIndex) Return the index in this LongArray of the last occurrence of the specified element such that (index <= lIndex), or NOT_FOUND if this LongArray does not contain the specified element.
Object	remove(long lIndex) Remove the specified index from the LongArray, returning its associated value.
LongArray.Iterator	reverseIterator() Obtain a LongArray.Iterator of the contents of the LongArray in reverse order (decreasing indices).
LongArray.Iterator	reverseIterator(long lIndex) Obtain a LongArray.Iterator of the contents of the LongArray in reverse order (decreasing indices), starting at a particular index such that the first call to next will set the location of the iterator at the first existent index that is less than or equal to the specified index, or will throw a NoSuchElementException if there is no such existent index.
Object	set(long lIndex, Object oValue) Add the passed item to the LongArray at the specified index.

Methods inherited from class com.tangosol.util.AbstractLongArray

equals, indexOf, lastIndexOf, toString

Field Detail

MAX

public static final long MAX

Maximum index value.

See Also:

Constant Field Values

EMPTY

public static final Object[] EMPTY

Empty array of objects.

Constructor Detail

SimpleLongArray

public SimpleLongArray()

Construct an empty SimpleLongArray.

Method Detail

get

public Object get(long lIndex)

Return the value stored at the specified index.

Specified by:

get in interface LongArray

Overrides:

get in class AbstractLongArray

Parameters:

lIndex - a long index value

Returns:

the object stored at the specified index, or null

set

public Object set(long lIndex,
                  Object oValue)

Add the passed item to the LongArray at the specified index.

If the index is already used, the passed value will replace the current value stored with the key, and the replaced value will be returned.

It is expected that LongArray implementations will "grow" as necessary to support the specified index.

Specified by:

set in interface LongArray

Parameters:

lIndex - a long index value

oValue - the object to store at the specified index

Returns:

the object that was stored at the specified index, or null

add

public long add(Object oValue)

Add the passed element value to the LongArray and return the index at which the element value was stored.

Specified by:

add in interface LongArray

Overrides:

add in class AbstractLongArray

Parameters:

oValue - the object to add to the LongArray

Returns:

the long index value at which the element value was stored

exists

public boolean exists(long lIndex)

Determine if the specified index is in use.

Specified by:

exists in interface LongArray

Overrides:

exists in class AbstractLongArray

Parameters:

lIndex - a long index value

Returns:

true if a value (including null) is stored at the specified index, otherwise false

remove

public Object remove(long lIndex)

Remove the specified index from the LongArray, returning its associated value.

Specified by:

remove in interface LongArray

Overrides:

remove in class AbstractLongArray

Parameters:

lIndex - the index into the LongArray

Returns:

the associated value (which can be null) or null if the specified index is not in the LongArray

contains

public boolean contains(Object oValue)

Determine if the LongArray contains the specified element.

More formally, returns true if and only if this LongArray contains at least one element e such that (oValue==null ? e==null : oValue.equals(e)).

Specified by:

contains in interface LongArray

Overrides:

contains in class AbstractLongArray

Parameters:

oValue - element whose presence in this list is to be tested

Returns:

true if this list contains the specified element

clear

public void clear()

Remove all nodes from the LongArray.

Specified by:

clear in interface LongArray

Overrides:

clear in class AbstractLongArray

isEmpty

public boolean isEmpty()

Test for empty LongArray.

Specified by:

isEmpty in interface LongArray

Overrides:

isEmpty in class AbstractLongArray

Returns:

true if LongArray has no nodes

getSize

public int getSize()

Determine the size of the LongArray.

Specified by:

getSize in interface LongArray

Overrides:

getSize in class AbstractLongArray

Returns:

the number of nodes in the LongArray

iterator

public LongArray.Iterator iterator()

Obtain a LongArray.Iterator of the contents of the LongArray.

Specified by:

iterator in interface LongArray

Returns:

an instance of LongArray.Iterator

iterator

public LongArray.Iterator iterator(long lIndex)

Obtain a LongArray.Iterator of the contents of the LongArray, starting at a particular index such that the first call to next will set the location of the iterator at the first existent index that is greater than or equal to the specified index, or will throw a NoSuchElementException if there is no such existent index.

Specified by:

iterator in interface LongArray

Parameters:

lIndex - the LongArray index to iterate from

Returns:

an instance of LongArray.Iterator

reverseIterator

public LongArray.Iterator reverseIterator()

Obtain a LongArray.Iterator of the contents of the LongArray in reverse order (decreasing indices).

Specified by:

reverseIterator in interface LongArray

Returns:

an instance of LongArray.Iterator

reverseIterator

public LongArray.Iterator reverseIterator(long lIndex)

Obtain a LongArray.Iterator of the contents of the LongArray in reverse order (decreasing indices), starting at a particular index such that the first call to next will set the location of the iterator at the first existent index that is less than or equal to the specified index, or will throw a NoSuchElementException if there is no such existent index.

Specified by:

reverseIterator in interface LongArray

Parameters:

lIndex - the LongArray index to iterate from

Returns:

an instance of LongArray.Iterator

getFirstIndex

public long getFirstIndex()

Determine the first index that exists in the LongArray.

Specified by:

getFirstIndex in interface LongArray

Overrides:

getFirstIndex in class AbstractLongArray

Returns:

the lowest long value that exists in this LongArray, or NOT_FOUND if the LongArray is empty

getLastIndex

public long getLastIndex()

Determine the last index that exists in the LongArray.

Specified by:

getLastIndex in interface LongArray

Overrides:

getLastIndex in class AbstractLongArray

Returns:

the highest long value that exists in this LongArray, or NOT_FOUND if the LongArray is empty

indexOf

public long indexOf(Object oValue,
                    long lIndex)

Return the index in this LongArray of the first occurrence of the specified element such that (index >= lIndex), or NOT_FOUND if this LongArray does not contain the specified element.

Specified by:

indexOf in interface LongArray

Overrides:

indexOf in class AbstractLongArray

lastIndexOf

public long lastIndexOf(Object oValue,
                        long lIndex)

Return the index in this LongArray of the last occurrence of the specified element such that (index <= lIndex), or NOT_FOUND if this LongArray does not contain the specified element.

Specified by:

lastIndexOf in interface LongArray

Overrides:

lastIndexOf in class AbstractLongArray

clone

public Object clone()

Make a clone of the LongArray. The element values are not deep-cloned.

Specified by:

clone in interface LongArray

Overrides:

clone in class AbstractLongArray

Returns:

a clone of this LongArray object

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