oracle.jdeveloper.usage.util

Class CharArrayPool

java.lang.Object

oracle.jdeveloper.usage.util.CharArrayPool

public final class CharArrayPool
extends java.lang.Object

The CharArrayPool is a utility class used by for pooling common char[] to reduce overall memory footprint.

Field Summary

Fields

Modifier and Type	Field and Description
static java.util.Comparator	CHAR_ARRAY_COMPARATOR Our char[] comparator instance.

Constructor Summary

Constructors

Constructor and Description
CharArrayPool(int initialSize) Construct a new CharArrayPool of given initial size.

Method Summary

Methods

Modifier and Type	Method and Description
char[]	add(char[] keyword) Utility routine which adds the char[] keyword to the pool, ensuring that the instance of the keyword of the pool is returned if it already exists.
char[]	add(javax.swing.text.Segment keywordSegment) Utility routine which adds the keyword to the pool, ensuring that the instance of the keyword of the pool is returned if it already exists.
char[]	add(java.lang.String keyword) Utility routine which adds the keyword to the pool, ensuring that the instance of the keyword of the pool is returned if it already exists.
boolean	contains(char[] keyword) Check whether the pool contains the given keyword
java.util.Iterator	iterator() Fetch an iterator to get the keywords for this pool.
int	size() Fetch the size of this keyword pool.
void	trimToSize() Trims size of keyword pool to reduce wasted space.

Methods inherited from class java.lang.Object

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

Field Detail

CHAR_ARRAY_COMPARATOR

public static final java.util.Comparator CHAR_ARRAY_COMPARATOR

Our char[] comparator instance. It supports comparisons between a char[] and one another String, Segment, or char[]. (One of the objects must be a char[]).

Constructor Detail

CharArrayPool

public CharArrayPool(int initialSize)

Construct a new CharArrayPool of given initial size.

Parameters:

initialSize - the initial size to use for the char[] pool

Method Detail

add

public char[] add(char[] keyword)

Utility routine which adds the char[] keyword to the pool, ensuring that the instance of the keyword of the pool is returned if it already exists. This is similar to the intern() pooling mechanism of the String class.

Parameters:

keyword - the char[] keyword to intern

Returns:

the interned-keyword

add

public char[] add(java.lang.String keyword)

Utility routine which adds the keyword to the pool, ensuring that the instance of the keyword of the pool is returned if it already exists.

Parameters:

keyword - the keyword to intern

Returns:

the interned-keyword

add

public char[] add(javax.swing.text.Segment keywordSegment)

Utility routine which adds the keyword to the pool, ensuring that the instance of the keyword of the pool is returned if it already exists. This is similar to the intern() pooling mechanism of the String class.

Parameters:

keyword - the keyword to intern

Returns:

the interned-keyword

size

public int size()

Fetch the size of this keyword pool.

Returns:

the size of this keyword pool

contains

public boolean contains(char[] keyword)

Check whether the pool contains the given keyword

Parameters:

keyword - the keyword to check

Returns:

true if the pool contains the given keyword

iterator

public java.util.Iterator iterator()

Fetch an iterator to get the keywords for this pool.

Returns:

the iterator for this keyword pool

trimToSize

public void trimToSize()

Trims size of keyword pool to reduce wasted space.