Package com.ctc.wstx.util

Class InternCache

java.lang.Object

com.ctc.wstx.util.InternCache

public final class InternCache
extends Object

Singleton class that implements "fast intern" functionality, essentially adding a layer that caches Strings that have been previously intern()ed, but that probably shouldn't be added to symbol tables. This is usually used by improving intern()ing of things like namespace URIs.

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	DEFAULT_SIZE	Let's create cache big enough to usually have enough space for all entries...
private static final int	MAX_SIZE	Let's limit maximum size.
private final ConcurrentHashMap<String,String>	mCache
private final ConcurrentLinkedQueue<String>	mInsertionOrder	Queue tracking insertion order for FIFO eviction when the cache exceeds MAX_SIZE.
private static final InternCache	sInstance

Constructor Summary

Constructors

Modifier	Constructor	Description
private	InternCache()

Method Summary

Modifier and Type	Method	Description
static InternCache	getInstance()
String	intern(String input)

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_SIZE

private static final int DEFAULT_SIZE

Let's create cache big enough to usually have enough space for all entries... (assuming NS URIs only)

See Also:

• Constant Field Values

MAX_SIZE

private static final int MAX_SIZE

Let's limit maximum size.

See Also:

• Constant Field Values

sInstance

private static final InternCache sInstance

mCache

private final ConcurrentHashMap<String,String> mCache

mInsertionOrder

private final ConcurrentLinkedQueue<String> mInsertionOrder

Queue tracking insertion order for FIFO eviction when the cache exceeds MAX_SIZE.

Constructor Details

InternCache

private InternCache()

Method Details

getInstance

public static InternCache getInstance()

intern

public String intern(String input)