org.apache.hadoop.hbase.filter

Class RegexStringComparator.JoniRegexEngine

java.lang.Object

org.apache.hadoop.hbase.filter.RegexStringComparator.JoniRegexEngine

All Implemented Interfaces:

RegexStringComparator.Engine

Enclosing class:

RegexStringComparator

static class RegexStringComparator.JoniRegexEngine
extends Object
implements RegexStringComparator.Engine

Implementation of the Engine interface using Jruby's joni regex engine.

This engine operates on byte arrays directly so is expected to be more GC friendly, and reportedly is twice as fast as Java's Pattern engine.

NOTE: Only the Pattern flags CASE_INSENSITIVE, DOTALL, and MULTILINE are supported.

Field Summary

Fields

Modifier and Type	Field and Description
private org.jcodings.Encoding	encoding
private org.joni.Regex	pattern
private String	regex

Constructor Summary

Constructors

Constructor and Description
JoniRegexEngine(String regex, int flags)

Method Summary

Modifier and Type	Method and Description
int	compareTo(byte[] value, int offset, int length) Match the given input against the configured pattern
String	getCharset() Returns the name of the configured charset
int	getFlags() Returns the set of configured match flags, a bit mask that may include Pattern flags
String	getPattern() Returns the string representation of the configured regular expression for matching
private int	joniToPatternFlags(int flags)
private int	patternToJoniFlags(int flags)
void	setCharset(String name) Set the charset used when matching
private void	setEncoding(String name)
byte[]	toByteArray() Return the serialized form of the configured matcher

Methods inherited from class java.lang.Object

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

Field Detail

encoding

private org.jcodings.Encoding encoding

regex

private String regex

pattern

private org.joni.Regex pattern

Constructor Detail

JoniRegexEngine

public JoniRegexEngine(String regex,
                       int flags)

Method Detail

getPattern

public String getPattern()

Description copied from interface: RegexStringComparator.Engine

Returns the string representation of the configured regular expression for matching

Specified by:

getPattern in interface RegexStringComparator.Engine

getFlags

public int getFlags()

Description copied from interface: RegexStringComparator.Engine

Returns the set of configured match flags, a bit mask that may include Pattern flags

Specified by:

getFlags in interface RegexStringComparator.Engine

getCharset

public String getCharset()

Description copied from interface: RegexStringComparator.Engine

Returns the name of the configured charset

Specified by:

getCharset in interface RegexStringComparator.Engine

setCharset

public void setCharset(String name)

Description copied from interface: RegexStringComparator.Engine

Set the charset used when matching

Specified by:

setCharset in interface RegexStringComparator.Engine

Parameters:

name - the name of the desired charset for matching

compareTo

public int compareTo(byte[] value,
                     int offset,
                     int length)

Description copied from interface: RegexStringComparator.Engine

Match the given input against the configured pattern

Specified by:

compareTo in interface RegexStringComparator.Engine

Parameters:

value - the data to be matched

offset - offset of the data to be matched

length - length of the data to be matched

Returns:

0 if a match was made, 1 otherwise

toByteArray

public byte[] toByteArray()

Description copied from interface: RegexStringComparator.Engine

Return the serialized form of the configured matcher

Specified by:

toByteArray in interface RegexStringComparator.Engine

patternToJoniFlags

private int patternToJoniFlags(int flags)

joniToPatternFlags

private int joniToPatternFlags(int flags)

setEncoding

private void setEncoding(String name)