org.apache.oro.text
Class PatternCacheLRU

java.lang.Object
  org.apache.oro.text.GenericPatternCache
      org.apache.oro.text.PatternCacheLRU

All Implemented Interfaces:

PatternCache

public final class PatternCacheLRU

extends GenericPatternCache

This class is a GenericPatternCache subclass implementing an LRU (Least Recently Used) cache replacement policy. In other words, patterns are added to the cache until it becomes full. Once the cache is full, when a new pattern is added to the cache, it replaces the least recently used pattern currently in the cache. This is probably the best general purpose pattern cache replacement policy.

Since:

1.0

Version:

2.1-dev-1

See Also:

GenericPatternCache

Field Summary

Fields inherited from class org.apache.oro.text.GenericPatternCache

DEFAULT_CAPACITY

Constructor Summary

PatternCacheLRU()
Same as:

PatternCacheLRU(int capacity)
Same as:

PatternCacheLRU(int capacity, PatternCompiler compiler)
Creates a PatternCacheLRU instance with a given cache capacity, and initialized to use a given PatternCompiler instance as a pattern compiler.

PatternCacheLRU(PatternCompiler compiler)
Same as:

Methods inherited from class org.apache.oro.text.GenericPatternCache

addPattern, addPattern, capacity, getPattern, getPattern, size

Methods inherited from class java.lang.Object

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

Constructor Detail

PatternCacheLRU

public PatternCacheLRU(int capacity,
                       PatternCompiler compiler)

Creates a PatternCacheLRU instance with a given cache capacity, and initialized to use a given PatternCompiler instance as a pattern compiler.

Parameters:

capacity - The capacity of the cache.

compiler - The PatternCompiler to use to compile patterns.

PatternCacheLRU

public PatternCacheLRU(PatternCompiler compiler)

Same as:

 PatternCacheLRU(GenericPatternCache.DEFAULT_CAPACITY, compiler);
 

PatternCacheLRU

public PatternCacheLRU(int capacity)

Same as:

 PatternCacheLRU(capacity, new Perl5Compiler());
 

PatternCacheLRU

public PatternCacheLRU()

Same as:

 PatternCacheLRU(GenericPatternCache.DEFAULT_CAPACITY);