org.apache.twill.api.Racks.java Source code

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Here is the source code for org.apache.twill.api.Racks.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.twill.api;

import com.google.common.collect.ImmutableSet;

import java.util.Arrays;
import java.util.Set;

/**
 * Represents a list of Racks.
 */

public class Racks {
    private final Set<String> racks;

    public Racks(Set<String> racks) {
        this.racks = ImmutableSet.copyOf(racks);
    }

    public Racks(String rack, String... moreRacks) {
        this.racks = ImmutableSet.<String>builder().add(rack).addAll(Arrays.asList(moreRacks)).build();
    }

    /**
     * Convenience method to create an instance of {@link org.apache.twill.api.Racks}.
     * @param rack A rack to be added.
     * @param moreRacks A list of racks to be added.
     * @return An instance of {@link org.apache.twill.api.Racks} containing specified racks.
     */
    public static Racks of(String rack, String... moreRacks) {
        return new Racks(rack, moreRacks);
    }

    /**
     * Get the list of racks.
     * @return list of racks.
     */
    public Set<String> get() {
        return this.racks;
    }

    @Override
    public String toString() {
        return this.racks.toString();
    }
}