Package org.antlr.tool

Class RandomPhrase

  • public class RandomPhrase
extends java.lang.Object
    Generate a random phrase given a grammar. Usage: java org.antlr.tool.RandomPhrase grammarFile.g startRule [seed] For example: java org.antlr.tool.RandomPhrase simple.g program 342 The seed acts like a unique identifier so you can get the same random phrase back during unit testing, for example. If you do not specify a seed then the current time in milliseconds is used guaranteeing that you'll never see that seed again. NOTE: this does not work well for large grammars...it tends to recurse too much and build really long strings. I need throttle control; later.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static boolean debug  
      protected static java.util.Random random  

    • Constructor Summary

      Constructors 
      Constructor Description
      RandomPhrase()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      protected static java.lang.Integer getTokenType​(Label label)  
      static void main​(java.lang.String[] args)
      Used to generate random strings
      protected static void randomPhrase​(Grammar g, java.util.List<java.lang.Integer> tokenTypes, java.lang.String startRule)
      an experimental method to generate random phrases for a given grammar given a start rule.

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • random

        protected static java.util.Random random

    • Constructor Detail

      • RandomPhrase

        public RandomPhrase()

    • Method Detail

      • randomPhrase

        protected static void randomPhrase​(Grammar g,
                                   java.util.List<java.lang.Integer> tokenTypes,
                                   java.lang.String startRule)
        an experimental method to generate random phrases for a given grammar given a start rule. Return a list of token types.

      • getTokenType

        protected static java.lang.Integer getTokenType​(Label label)

      • main

        public static void main​(java.lang.String[] args)
        Used to generate random strings