org.apache.lucene.search.regex
Class JavaUtilRegexCapabilities

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

All Implemented Interfaces:

org.apache.lucene.search.regex.RegexCapabilities

public class JavaUtilRegexCapabilities

extends java.lang.Object

implements org.apache.lucene.search.regex.RegexCapabilities

An implementation tying Java's built-in java.util.regex to RegexQuery. Note that because this implementation currently only returns null from prefix() that queries using this implementation will enumerate and attempt to match(java.lang.String) each term for the specified field in the index.

Constructor Summary

JavaUtilRegexCapabilities()

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

JavaUtilRegexCapabilities

public JavaUtilRegexCapabilities()

Method Detail

compile

public void compile(java.lang.String pattern)

Description copied from interface: org.apache.lucene.search.regex.RegexCapabilities

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

Specified by:

compile in interface org.apache.lucene.search.regex.RegexCapabilities

Parameters:

pattern - regular expression pattern

match

public boolean match(java.lang.String string)

Specified by:

match in interface org.apache.lucene.search.regex.RegexCapabilities

Parameters:

string -

Returns:

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

prefix

public java.lang.String prefix()

Description copied from interface: org.apache.lucene.search.regex.RegexCapabilities

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

Specified by:

prefix in interface org.apache.lucene.search.regex.RegexCapabilities

Returns:

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

equals

public boolean equals(java.lang.Object o)

hashCode

public int hashCode()