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OpenID and JWT client for Java Servlet Applications

There is a newer version: 0.3.0

package com.authkit;

public final class Util {

    public static final  T orDefault(T value, T defaultValue) {
        return value == null ? defaultValue : value;
    }

    public static final  T required(T value, String label) {
        if (value == null) {
            throw new IllegalArgumentException(String.format("%s is required", label));
        }
        return value;
    }
}