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JaVers - object auditing and diff framework for Java

There is a newer version: 7.6.1

package org.javers.common.validation;

/**
 * Set of utils for methods preconditions.
 * @author Pawel Cierpiatka 
 */
public class Validate {

    /**
     * Checks if given argument is not null.
     *
     * @throws  IllegalArgumentException
     */
    public static void argumentIsNotNull(Object argument, String message) {
        if(argument == null) {
            throw new IllegalArgumentException(message);
        }
    }

    /**
     * @throws  IllegalArgumentException
     */
    public static void argumentIsNotNull(Object argument) {
        argumentIsNotNull(argument,"argument should not be null");
    }

    /**
     * @throws  IllegalArgumentException
     */
    public static void argumentsAreNotNull(Object... arguments) {
        for (Object argument : arguments) {
            if(argument == null) {
                throw new IllegalArgumentException("argument should not be null");
            }
        }
    }

    /**
     * @throws  IllegalArgumentException
     */
    public static void argumentCheck(boolean argumentCondition, String message) {
        if (!argumentCondition) {
            throw new IllegalArgumentException(message);
        }

    }

    /**
     * @throws  IllegalStateException
     */
    public static void conditionFulfilled(boolean condition, String message) {
        if (!condition) {
            throw new IllegalStateException(message);
        }
    }
}