String Reformat

Description

A simple yet powerful tool to reconstruct parts of a string based an a regex and a pattern the found part should be reformated to.

Usage

The class works by taking an input string to reformat, locate a part of the string using a regex, then splitting the found part into a list och characters that can then be injected as a replacement to the found string. This also includes any provided characters

• Input string: Can be anything except contain "$xx" where xx is random number.

• Regex: Any kind of regex, class throws exception of no match was found.

• Reformat pattern: Characters found by regex is represented as "$" and a number that matches the position of the found char. Any other provided characters will be injected as well.

Import the class

import com.github.stringreformat.RegexFormat;

Methods

The RegexFormat class has 2 public methods: RegexFormat.reformat(string, regex, pattern) - reformats first occurrence of the regex. RegexFormat.reformatAll(string, regex, pattern) - reformats all occurrences of the regex. RegexFormat.hasMatch(string, regex) - returns a boolean if match exist.

Input data

Class requires:

• Input string to reformat
• Regex as String to locate what to reformat
• Reformat pattern to know how to reformat

Examples:

# reformat()
String string = "20120210_125954";
String regex = "[0-9]{8}_[0-9]{6}";
String pattern = "$0$1$2$3-$4$5-$6$7 $9$10:$11$12:$13$14";
String reformattedString = RegexFormat.reformat(string, regex, pattern);
--> "2012-02-10 12:59:54"

String string = "20120210_125954, 19561122_223344";
String regex = "[0-9]{8}_[0-9]{6}";
String pattern = "$0$1$2$3-$4$5-$6$7 $9$10:$11$12:$13$14";
String reformattedString = RegexFormat.reformat(string, regex, pattern);
--> "2012-02-10 12:59:54, 19561122_223344"

String string = "20120210_125954";
String regex = "[0-9]{8}_[0-9]{6}";
String pattern = "$4$5-$6$7 $9$10:$11$12";
String reformattedString = RegexFormat.reformat(string, regex, pattern);
--> "02-10 12:59"

String string = "This is some text [20120210_125954] that contains a date!";
String regex = "[0-9]{8}_[0-9]{6}";
String pattern = "$4$5-$6$7 $9$10:$11$12";
String reformattedString = RegexFormat.reformat(string, regex, pattern);
--> "This is some text [2012-02-10 12:59:54] that contains a date!"

String string = "Reformat this asap.";
String regex = "asap";
String pattern = "$0.$1.$2.$3";
String reformattedString = RegexFormat.reformat(string, regex, pattern);
--> "Reformat this a.s.a.p."

String string = "Reformat this asap.";
String regex = "this|asap";
String pattern = "$0.$1.$2.$3";
String reformattedString = RegexFormat.reformat(string, regex, pattern);
--> "Reformat t.h.i.s asap."

# reformatAll()
String string = "20120210_125954, 19561122_223344";
String regex = "[0-9]{8}_[0-9]{6}";
String pattern = "$0$1$2$3-$4$5-$6$7 $9$10:$11$12:$13$14";
String reformattedString = RegexFormat.reformatAll(string, regex, pattern);
--> "2012-02-10 12:59:54, 1956-11-22 22:33:44"

String string = "Reformat this asap.";
String regex = "this|asap";
String pattern = "$0.$1.$2.$3";
String reformattedString = RegexFormat.reformatAll(string, regex, pattern);
--> "Reformat t.h.i.s a.s.a.p."

String string = "Reformat this asap.";
String regex = "Reformat|this|asap";
String pattern = "$7$6$5$4$3$2$1$0";
String reformattedString = RegexFormat.reformatAll(string, regex, pattern);
--> "tamrofeR siht pasa."

# hasMatch()
String string = "20120210_125954";
String regex = "[0-9]{8}_[0-9]{6}";
boolean matches = RegexFormat.hasMatch(string, regex);
--> True

# hasMatch()
String string = "20120210_125954";
String regex = "Some-words";
boolean matches = RegexFormat.hasMatch(string, regex);
--> False

Do nots: Locating $ signs in a regex is currently not supported. Since $n is part of the inject pattern all existing $ in the input string will be removed and re added in the end.

Installation

Recommended is to install the tool via a dependency manager like Maven or Gradle. The source data can be downloaded here: https://github.com/brajjan79/RegexFormat/tags

Maven, Gradle etc

See Jitpack: https://jitpack.io/#brajjan79/RegexFormat