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org.apache.regexp
Class REProgram  

java.lang.Object
  org.apache.regexp.REProgram

All Implemented Interfaces:

java.io.Serializable

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public class REProgram

extends java.lang.Object

implements java.io.Serializable

A class that holds compiled regular expressions. This is exposed mainly for use by the recompile utility (which helps you produce precompiled REProgram objects). You should not otherwise need to work directly with this class.

Version:

$Id: REProgram.java 232192 2005-08-12 03:04:07Z vgritsenko $

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Field Summary
(package private)  int	flags
(package private)  char[]	instruction
(package private)  int	lenInstruction
(package private)  int	maxParens
(package private) static int	OPT_HASBACKREFS
(package private) static int	OPT_HASBOL
(package private)  char[]	prefix

 

Constructor Summary

REProgram(char[] instruction)           Constructs a program object from a character array

REProgram(char[] instruction, int lenInstruction)           Constructs a program object from a character array

REProgram(int parens, char[] instruction)           Constructs a program object from a character array

 

Method Summary
char[]	getInstructions()           Returns a copy of the current regular expression program in a character array that is exactly the right length to hold the program.
void	setInstructions(char[] instruction, int lenInstruction)           Sets a new regular expression program to run.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

OPT_HASBACKREFS

static final int OPT_HASBACKREFS

See Also:

Constant Field Values

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OPT_HASBOL

static final int OPT_HASBOL

See Also:

Constant Field Values

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instruction

char[] instruction

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lenInstruction

int lenInstruction

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prefix

char[] prefix

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flags

int flags

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maxParens

int maxParens

Constructor Detail

REProgram

public REProgram(char[] instruction)

Constructs a program object from a character array

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REProgram

public REProgram(int parens,
                 char[] instruction)

Constructs a program object from a character array

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REProgram

public REProgram(char[] instruction,
                 int lenInstruction)

Constructs a program object from a character array

Method Detail

getInstructions

public char[] getInstructions()

Returns a copy of the current regular expression program in a character array that is exactly the right length to hold the program. If there is no program compiled yet, getInstructions() will return null.

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setInstructions

public void setInstructions(char[] instruction,
                            int lenInstruction)

Sets a new regular expression program to run. It is this method which performs any special compile-time search optimizations. Currently only two optimizations are in place - one which checks for backreferences (so that they can be lazily allocated) and another which attempts to find an prefix anchor string so that substantial amounts of input can potentially be skipped without running the actual program.

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