001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.reef.util;
020
021/**
022 * Utilities for creating Builders.
023 */
024public final class BuilderUtils {
025  /**
026   * Throws a runtime exception if the parameter is null.
027   * @param <T> a type of parameter
028   * @param parameter
029   * @return the parameter if it is not null
030   */
031  public static <T> T notNull(final T parameter) {
032    if (parameter == null) {
033      throw new IllegalArgumentException("required parameter");
034    } else {
035      return parameter;
036    }
037  }
038
039  /**
040   * Empty private constructor to prohibit instantiation of utility class.
041   */
042  private BuilderUtils() {
043  }
044}