https://github.com/mifmif/Generex

A Java library for generating String from a regular expression.
https://github.com/mifmif/Generex

java regex regular-expression string-generator

Last synced: about 2 months ago
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A Java library for generating String from a regular expression.

• Host: GitHub
• URL: https://github.com/mifmif/Generex
• Owner: mifmif
• Created: 2014-07-08T12:49:38.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2021-04-28T14:47:43.000Z (over 3 years ago)
• Last Synced: 2024-06-19T23:11:51.380Z (3 months ago)
• Topics: java, regex, regular-expression, string-generator
• Language: Java
• Homepage:
• Size: 230 KB
• Stars: 372
• Watchers: 28
• Forks: 77
• Open Issues: 19
• Metadata Files:
  • Readme: README.md

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README

        
Generex

=======

A Java library for generating String that match  a given regular expression. it help you generate all Strings that matches a given Regex, random one , or one String from the matched String based on it's index.

Generex is based on the library http://www.brics.dk/~amoeller/automaton/.

[![Build Status](https://travis-ci.org/mifmif/Generex.png)](https://travis-ci.org/mifmif/Generex)

**Features :**

-

-Generate Random String that match the Regex.

-Specify the min/max length  of the random generated String.

-Generate a list of all Strings that matches the Regex, if the number of String that matches the Regex is greater then Integer.MAX_VALUE , the returned list will contains Strings up to the size limit of java.util.List which is Integer.MAX_VALUE (see iterator's feature in this case). 

-generate a sublist of the Strings that matches the Regex based on the lexicographical order.

-Given an index 'n' , generate the n'th element in lexicographical order of the list of Strings that matches the Regex.

-Prepare an iterator that loop over all the Strings that matches the Regex. even if the set of String that matches the given Regex is infinite.

 

**How to use it :**

-

If you use [Maven](http://maven.apache.org) you can include this library to your project by adding the following dependency: 

```xml

  com.github.mifmif

  generex

  1.0.2

```

The list of all available versions can be found at [Maven Central](http://search.maven.org/#browse|588844112).

Here is the sample Java code demonstrating library usage:

```java

		Generex generex = new Generex("[0-3]([a-c]|[e-g]{1,2})");

		// Generate random String

		String randomStr = generex.random();

		System.out.println(randomStr);// a random value from the previous String list

		// generate the second String in lexicographical order that match the given Regex.

		String secondString = generex.getMatchedString(2);

		System.out.println(secondString);// it print '0b'

		// Generate all String that matches the given Regex.

		List matchedStrs = generex.getAllMatchedStrings();

		// Using Generex iterator

		Iterator iterator = generex.iterator();

		while (iterator.hasNext()) {

			System.out.print(iterator.next() + " ");

		}

		// it prints:

		// 0a 0b 0c 0e 0ee 0ef 0eg 0f 0fe 0ff 0fg 0g 0ge 0gf 0gg

		// 1a 1b 1c 1e 1ee 1ef 1eg 1f 1fe 1ff 1fg 1g 1ge 1gf 1gg

		// 2a 2b 2c 2e 2ee 2ef 2eg 2f 2fe 2ff 2fg 2g 2ge 2gf 2gg

		// 3a 3b 3c 3e 3ee 3ef 3eg 3f 3fe 3ff 3fg 3g 3ge 3gf 3gg

		

```

**License**

-

Generex is licensed under the Apache License, Version 2.0.  

http://www.apache.org/licenses/LICENSE-2.0