org.apache.lucene.search.regex
Class JakartaRegexpCapabilities

java.lang.Object
  org.apache.lucene.search.regex.JakartaRegexpCapabilities

All Implemented Interfaces:

RegexCapabilities

public class JakartaRegexpCapabilities
extends Object
implements RegexCapabilities

Implementation tying Jakarta Regexp to RegexQuery. Thanks to some internals of Jakarta Regexp, this has a solid prefix() implementation.

Constructor Summary

JakartaRegexpCapabilities()

Method Summary

void	compile(String pattern) Called by the constructor of RegexTermEnum allowing implementations to cache a compiled version of the regular expression pattern.
boolean	equals(Object o)
int	hashCode()
boolean	match(String string)
String	prefix() A wise prefix implementation can reduce the term enumeration (and thus increase performance) of RegexQuery dramatically!

Methods inherited from class java.lang.Object

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

Constructor Detail

JakartaRegexpCapabilities

public JakartaRegexpCapabilities()

Method Detail

compile

public void compile(String pattern)

Description copied from interface: RegexCapabilities

Called by the constructor of RegexTermEnum allowing implementations to cache a compiled version of the regular expression pattern.

Specified by:

compile in interface RegexCapabilities

Parameters:

pattern - regular expression pattern

match

public boolean match(String string)

Specified by:

match in interface RegexCapabilities

Returns:

true if string matches the pattern last passed to RegexCapabilities.compile(java.lang.String).

prefix

public String prefix()

Description copied from interface: RegexCapabilities

A wise prefix implementation can reduce the term enumeration (and thus increase performance) of RegexQuery dramatically!

Specified by:

prefix in interface RegexCapabilities

Returns:

static non-regex prefix of the pattern last passed to RegexCapabilities.compile(java.lang.String). May return null.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object