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Common Base for Implementations of the ShrinkWrap Project
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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2009, Red Hat Middleware LLC, and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jboss.shrinkwrap.impl.base;

/**
 * Validate
 * 
 * Validation utility
 *
 * @author Aslak Knutsen
 * @version $Revision: $
 */
public final class Validate {
    private Validate() {
    }

    /**
     * Checks that object is not null, throws exception if it is.
     *
     * @param obj
     *            The object to check
     * @param message
     *            The exception message
     * @throws IllegalArgumentException
     *             Thrown if obj is null
     */
    public static void notNull(final Object obj, final String message) throws IllegalArgumentException {
        if (obj == null) {
            throw new IllegalArgumentException(message);
        }
    }

    /**
     * Checks that the specified String is not null or empty, throws exception if it is.
     *
     * @param string
     *            The object to check
     * @param message
     *            The exception message
     * @throws IllegalArgumentException
     *             Thrown if obj is null
     */
    public static void notNullOrEmpty(final String string, final String message) throws IllegalArgumentException {
        if (string == null || string.isEmpty()) {
            throw new IllegalArgumentException(message);
        }
    }

    /**
     * Checks that the specified array is not null or contain any null values.
     *
     * @param objects
     *            The object to check
     * @param message
     *            The exception message
     */
    public static void notNullAndNoNullValues(final Object[] objects, final String message) {
        notNull(objects, message);
        for (Object object : objects) {
            notNull(object, message);
        }
    }
}