org.jxmpp.util.Objects Maven / Gradle / Ivy
/**
*
* Copyright 2019 Florian Schmaus
*
* 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.jxmpp.util;
public class Objects {
/**
* Checks that the specified object reference is not null and
* throws a customized {@link IllegalArgumentException} if it is.
*
* Note that unlike java.util.Objects, this method throws an
* {@link IllegalArgumentException} instead of an {@link NullPointerException}.
*
*
* @param the type of the reference.
* @param obj the object reference to check for nullity.
* @param parameterName the name of the parameter which is null
* @return obj if not null.
* @throws IllegalArgumentException in case obj is
* null.
*/
public static T requireNonNull(T obj, String parameterName) throws IllegalArgumentException {
if (obj == null) {
throw new IllegalArgumentException("Argument '" + parameterName + "' must not be null");
}
return obj;
}
}