org.apache.regexp
Class REProgram
java.lang.Object
org.apache.regexp.REProgram
- Serializable
public class REProgram
extends java.lang.Object
implements 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.
$Id: REProgram.java 232192 2005-08-12 03:04:07Z vgritsenko $
REProgram(char[] instruction) - Constructs a program object from a character array
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REProgram(char[] instruction, int lenInstruction) - Constructs a program object from a character array
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REProgram(int parens, char[] instruction) - Constructs a program object from a character array
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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.
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void | setInstructions(char[] instruction, int lenInstruction) - Sets a new regular expression program to run.
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OPT_HASBACKREFS
(package private) static final int OPT_HASBACKREFS
OPT_HASBOL
(package private) static final int OPT_HASBOL
flags
(package private) int flags
instruction
(package private) char[] instruction
lenInstruction
(package private) int lenInstruction
maxParens
(package private) int maxParens
prefix
(package private) char[] prefix
REProgram
public REProgram(char[] instruction)
Constructs a program object from a character array
instruction
- Character array with RE opcode instructions in it
REProgram
public REProgram(char[] instruction,
int lenInstruction)
Constructs a program object from a character array
instruction
- Character array with RE opcode instructions in itlenInstruction
- Amount of instruction array in use
REProgram
public REProgram(int parens,
char[] instruction)
Constructs a program object from a character array
parens
- Count of parens in the programinstruction
- Character array with RE opcode instructions in it
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.
- 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.
instruction
- Program instruction bufferlenInstruction
- Length of instruction buffer in use
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