jvindicator

JVM	Platform	Status
OpenJDK (Temurin) Current	Linux
OpenJDK (Temurin) LTS	Linux
OpenJDK (Temurin) Current	Windows
OpenJDK (Temurin) LTS	Windows

jvindicator

Trivial parameter validation functions intended for use in HTTP servlet applications.

Features

• Type-safe parameter validation.
• Written in pure Java 21.
• OSGi ready.
• JPMS ready.
• ISC license.
• High-coverage automated test suite.

Usage

Use the Vindicator class to build a validator, and then call check(). After calling check(), parameters can be inspected in a type-safe manner:

final var v =
  Vindication.start();
final var p0 =
  v.addRequiredParameter("u0", Vindication.integerUnsigned());
final var p1 =
  v.addRequiredParameter("u1", Vindication.integerUnsignedLong());
final var p2 =
  v.addRequiredParameter("s0", Vindication.integerSigned());
final var p3 =
  v.addRequiredParameter("s1", Vindication.integerSignedLong());
final var p4 =
  v.addRequiredParameter("i0", Vindication.integerBig());

v.check(Map.ofEntries(
  Map.entry("u0", new String[]{"23"}),
  Map.entry("u1", new String[]{"24"}),
  Map.entry("s0", new String[]{"-23"}),
  Map.entry("s1", new String[]{"-24"}),
  Map.entry("i0", new String[]{"-4703919738795935661825"})
));

assertEquals(23, p0.get());
assertEquals(24L, p1.get());
assertEquals(-23, p2.get());
assertEquals(-24L, p3.get());
assertEquals(new BigInteger("-4703919738795935661825"), p4.get());