Source code

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.tang;
020
021/**
022 * Helper class for Configurations.
023 */
024public final class Configurations {
025
026  /**
027   * This is a utility class that isn't meant to be instantiated.
028   */
029  private Configurations() {
030  }
031
032
033  /**
034   * Merge a set of Configurations.
035   *
036   * @param configurations the configuration to be merged
037   * @return the merged configuration.
038   * @throws org.apache.reef.tang.exceptions.BindException if the merge fails.
039   */
040  public static Configuration merge(final Configuration... configurations) {
041    return Tang.Factory.getTang().newConfigurationBuilder(configurations).build();
042  }
043
044  /**
045   * Merge a set of Configurations.
046   *
047   * @param configurations the configuration to be merged
048   * @return the merged configuration.
049   * @throws org.apache.reef.tang.exceptions.BindException if the merge fails.
050   */
051  public static Configuration merge(final Iterable<Configuration> configurations) {
052    final ConfigurationBuilder configurationBuilder = Tang.Factory.getTang().newConfigurationBuilder();
053    for (final Configuration configuration : configurations) {
054      configurationBuilder.addConfiguration(configuration);
055    }
056    return configurationBuilder.build();
057  }
058
059}