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, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
     
    boolean
    equals(Object obj)
    Indicates whether some other object is "equal to" this one.
    final Class
    getClass()
    Returns the runtime class of an object.
    int
    hashCode()
    Returns a hash code value for the object.
    final void
    notify()
    Wakes up a single thread that is waiting on this object's monitor.
    final void
    notifyAll()
    Wakes up all threads that are waiting on this object's monitor.
    String
    toString()
    Returns a string representation of the object.
    final void
    wait()
    Causes current thread to wait until another thread invokes the method or the method for this object.
    final void
    wait(long timeout)
    Causes current thread to wait until either another thread invokes the method or the method for this object, or a specified amount of time has elapsed.
    final void
    wait(long timeout, int nanos)
    Causes current thread to wait until another thread invokes the method or the method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.

  • 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