Set of java utils that I generally carry around when I write OSS java projects.
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README.md

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my-java-utils

Set of Java utils that I take along with my OSS java projects. Most of them are influenced from Scala world and Guava library. Library has zero external dependencies. If you find some implementations can be better, please do let me know.

Features

List

  • Lists#map
  • Lists#filter
  • Lists#foldL
  • Lists#find
  • Lists#mkString
  • Lists#Nil
  • Lists#concat
  • Lists#flatten
  • Lists#take
  • Lists#takeWhile

Set

  • Sets#copy
  • Sets#isEmpty
  • Sets#nonEmpty

Iterable

  • Iterables#exists
  • Iterables#forall
  • Iterables#head
  • Iterables#headOption
  • Iterables#isEmpty
  • Iterables#nonEmpty
  • Iterables#toMap
  • Iterables#foreach

Maps

  • Maps#of
  • Maps#builder
  • Maps#empty
  • Maps#getOrElse

Lang

  • Option / Some / None
  • Tuple2 / Tuple3
  • Function
  • Predicate

Functions

  • Functions#identity
  • Functions#STDOUT
  • Functions#STDERR

Predicates

  • Predicates#True
  • Predicates#False

StringUtils

  • StringUtils#isNotEmpty
  • StringUtils#isEmpty
  • StringUtils#startsWith
  • StringUtils#endsWith
  • StringUtils#size
  • StringUtils#trim
  • StringUtils#isBlank
  • StringUtils#isNotBlank

IO

  • IO#fromFile
  • IO#linesFromFile
  • IO#linesFromInputStream

Monadic Parsers

Parser<String> parser = Literal("input");
ParserResult<String> result = parser.parse("input is awesome"); // returns Success<String>
ParserResult<String> result = parser.parse("output is awesome"); // returns Failure<String>

Inspired from Scala's Parser Combinator and JS Parsimmon. Take a look at TemplateParser, it's implemented using this parser package.

Parsers

  • Parsers#Literal
  • Parsers#Character
  • Parsers#Integer
  • Parsers#Double
  • Parsers#Regex
  • Parsers#Sequence

Parser

  • Parser#map
  • Parser#thenR
  • Parser#thenL
  • Parser#then
  • Parser#or
  • Parser#debug
  • Parser#skip

TemplateParser

Supports #{variable} and #{variable?default} type syntax based rendering. Inspired from sbt-editsource plugin.

Dependencies

For Maven,

<dependency>
  <groupId>in.ashwanthkumar</groupId>
  <artifactId>my-java-utils</artifactId>
  <version>0.1.0</version>
</dependency>

For SBT,

libraryDependencies += "in.ashwanthkumar" % "my-java-utils" % "0.1.0"

License

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