Package org.openstreetmap.josm.gui.mappaint

Class StyleCache

java.lang.Object

org.openstreetmap.josm.gui.mappaint.StyleCache

public final class StyleCache
extends java.lang.Object

Caches styles for a single primitive.

This object is immutable.

Field Summary

Fields

Modifier and Type	Field	Description
static StyleCache	EMPTY_STYLECACHE	An empty style cache entry
private static java.util.Map<StyleCache,StyleCache>	internPool
private DividedScale<StyleElementList>	plainStyle
private DividedScale<StyleElementList>	selectedStyle

Constructor Summary

Constructors

Modifier	Constructor	Description
private	StyleCache()
private	StyleCache(StyleCache sc)

Method Summary

Modifier and Type	Method	Description
(package private) static void	clearStyleCachePool()	Clears the style cache.
boolean	equals(java.lang.Object obj)
static int	getInternPoolSize()	Get the size of the intern pool.
Pair<StyleElementList,Range>	getWithRange(double scale, boolean selected)	Get the style for a specific style.
int	hashCode()
private StyleCache	intern()	Like String.intern() (reduce memory consumption).
StyleCache	put(StyleElementList o, Range r, boolean selected)	Creates a new copy of this style cache with a new entry added.
private static DividedScale<StyleElementList>	scale(DividedScale<StyleElementList> scale)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

internPool

private static final java.util.Map<StyleCache,StyleCache> internPool

EMPTY_STYLECACHE

public static final StyleCache EMPTY_STYLECACHE

An empty style cache entry

plainStyle

private DividedScale<StyleElementList> plainStyle

selectedStyle

private DividedScale<StyleElementList> selectedStyle

Constructor Detail

StyleCache

private StyleCache(StyleCache sc)

StyleCache

private StyleCache()

Method Detail

put

public StyleCache put(StyleElementList o,
                      Range r,
                      boolean selected)

Creates a new copy of this style cache with a new entry added.

Parameters:

o - The style to cache.

r - The range the style is for.

selected - The style list we should use (selected/unselected)

Returns:

The new object.

scale

private static DividedScale<StyleElementList> scale(DividedScale<StyleElementList> scale)

getWithRange

public Pair<StyleElementList,Range> getWithRange(double scale,
                                                       boolean selected)

Get the style for a specific style. Returns the range as well.

Parameters:

scale - The current scale

selected - true to get the state for a selected element,

Returns:

The style and the range it is valid for.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

intern

private StyleCache intern()

Like String.intern() (reduce memory consumption). StyleCache must not be changed after it has been added to the intern pool.

Returns:

style cache

clearStyleCachePool

static void clearStyleCachePool()

Clears the style cache. This should only be used for testing. It may be removed some day and replaced by a WeakReference implementation that automatically forgets old entries.

getInternPoolSize

public static int getInternPoolSize()

Get the size of the intern pool. Only for tests!

Returns:

size of the intern pool