org.apache.regexp
Class  REProgram
java.lang.Object
  |
  +--org.apache.regexp.REProgram
- All Implemented Interfaces: 
- java.io.Serializable
- 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 518156 2007-03-14 14:31:26Z vgritsenko $
- Author: 
- Jonathan Locke
- See Also: 
- RE,- RECompiler, Serialized Form
 
| 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.
 | 
|  char[] | getPrefix()Returns a copy of the prefix of current regular expression program
 in a character array.
 | 
|  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, registerNatives, toString, wait, wait, wait | 
 
OPT_HASBACKREFS
static final int OPT_HASBACKREFS
OPT_HASBOL
static final int OPT_HASBOL
instruction
char[] instruction
lenInstruction
int lenInstruction
prefix
char[] prefix
flags
int flags
maxParens
int maxParens
REProgram
public REProgram(char[] instruction)
- Constructs a program object from a character array- 
- Parameters:
- instruction- Character array with RE opcode instructions in it
 
REProgram
public REProgram(int parens,
                 char[] instruction)
- Constructs a program object from a character array- 
- Parameters:
- parens- Count of parens in the program
- 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
 
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
 
getPrefix
public char[] getPrefix()
- Returns a copy of the prefix of current regular expression program
 in a character array.  If there is no prefix, or there is no program
 compiled yet, getPrefixwill return null.
- 
 
- 
- Returns:
- A copy of the prefix of current compiled RE program
 
Copyright © 2001-2007 Apache Software Foundation. All Rights Reserved.