Class REProgram

java.lang.Object
com.codename1.util.regex.REProgram
public class REProgram extends Object
A class that holds compiled regular expressions. You should not need to work directly with this class.

  • Constructor Summary

    Constructors
    Constructor
    Description
    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

    Modifier and Type
    Method
    Description
    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 Object

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

  • Constructor Details

    • 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

  • Method Details

    • 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 a 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, getPrefix will return null.

      Returns

      A copy of the prefix of current compiled RE program