/*
* Copyright (C) 2011 Red Hat, Inc. and/or its affiliates.
*
* 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.errai.common.client.api;
/**
* Non-instantiable utility for self-checking code.
*
* @author Christian Sadilek <csadilek@redhat.com>
* @author Jonathan Fuerth <jfuerth@redhat.com>
* @author Mike Brock
*/
public class Assert {
private Assert() {}
/**
* Throws NullPointerException if the value is null with an error message.
*
* @param <V>
* @param errorMessage an error message to be displayed as part of the NullPointerException thrown.
* @param value the value that must not be null
* @throws NullPointerException if value is null.
* @return
*/
public static <V> V notNull(final String errorMessage, final V value) {
if (value == null) {
throw new NullPointerException(errorMessage);
}
return value;
}
/**
* Throws NullPointerException if the value is null.
*
* @param <V>
* @param value the value that must not be null
* @throws NullPointerException if value is null.
* @return
*/
public static <V> V notNull(final V value) {
if (value == null) {
throw new NullPointerException();
}
return value;
}
}