net.amygdalum.stringsearchalgorithms.patternsearch.chars

Class BPGlushkov

java.lang.Object

net.amygdalum.stringsearchalgorithms.patternsearch.chars.BPGlushkov

All Implemented Interfaces:

StringSearchAlgorithm

public class BPGlushkov
extends Object
implements StringSearchAlgorithm

An implementation of the regex pattern search algorithm Bit-Parallel Glushkov. This algorithm takes a regex pattern as input and generates a finder which can find this pattern in documents. The efficiency of this algorithm depends on the pattern to process: - works fine for complex patterns (many regex operators) - works better for short patterns (few chars (excluding regex operators))

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	BPGlushkov.Factory

Constructor Summary

Constructors

Constructor and Description
BPGlushkov(String pattern)

Method Summary

Modifier and Type	Method and Description
StringFinder	createFinder(CharProvider chars, StringFinderOption... options) creates a StringFinder instance from the pattern (given by the current instance) and the given document.
int	getPatternLength()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

BPGlushkov

public BPGlushkov(String pattern)

Method Detail

createFinder

public StringFinder createFinder(CharProvider chars,
                                 StringFinderOption... options)

Description copied from interface: StringSearchAlgorithm

creates a StringFinder instance from the pattern (given by the current instance) and the given document.

Specified by:

createFinder in interface StringSearchAlgorithm

Parameters:

chars - the given document wrapped into a CharProvider

options - the configuration options for the string finder

Returns:

a StringFinder that can iterate over the matches

getPatternLength

public int getPatternLength()

Specified by:

getPatternLength in interface StringSearchAlgorithm

Returns:

the length of the given pattern (min length in case of a multi string algorithm)

toString

public String toString()

Overrides:

toString in class Object