JarCastingGenerex
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/.
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 you can include this library to your project by adding the following dependency:
<dependency>
<groupId>com.github.mifmif</groupId>
<artifactId>generex</artifactId>
<version>1.0.2</version>
</dependency>
The list of all available versions can be found at Maven Central.
Here is the sample Java code demonstrating library usage:
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<String> 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