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,v 1.1 2000/04/27 01:22:33 jon Exp $
Constructs a program object from a character array
Parameters:
instruction - Character array with RE opcode instructions in it
REProgram
public REProgram(char[] instruction,
int lenInstruction)
Constructs a program object from a character array
Parameters:
instruction - Character array with RE opcode instructions in it
lenInstruction - Amount of instruction array in use
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.
Returns:
A copy of the current compiled RE program
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.
Parameters:
instruction - Program instruction buffer
lenInstruction - Length of instruction buffer in use
