com.attribyte.essem.model.Host.java Source code

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Here is the source code for com.attribyte.essem.model.Host.java

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/*
 * Copyright 2014, 2015 Attribyte, LLC
 *
 * 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 com.attribyte.essem.model;

import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Lists;
import edu.emory.mathcs.backport.java.util.Collections;

import java.util.Collection;
import java.util.Comparator;
import java.util.List;

/**
 * A host.
 */
public class Host {

    /**
     * Compares hosts by name.
     */
    public static final Comparator<Host> alphaComparator = new Comparator<Host>() {
        @Override
        public int compare(final Host o1, final Host o2) {
            return o1.name.compareTo(o2.name);
        }
    };

    /**
     * Creates a host.
     * @param name The host name.
     * @param instances A set of instances associated with the host.
     */
    public Host(final String name, final Collection<String> instances) {
        this.name = name;
        this.instances = instances != null ? ImmutableSet.copyOf(instances) : ImmutableSet.<String>of();
    }

    /**
     * Are there multiple instances for this host?
     * @return If more than one instance, <code>true</code> otherwise <code>false</code>.
     */
    public boolean isMultiInstance() {
        return this.instances.size() > 1;
    }

    /**
     * Gets a list containing instances (if any) sorted by name.
     * @param sort The sort order.
     * @return The sorted list.
     */
    public List<String> getInstances(Sort sort) {
        List<String> sortedInstances = Lists.newArrayList(this.instances);
        Collections.sort(sortedInstances);
        if (sort == Sort.DESC) {
            Collections.reverse(sortedInstances);
        }
        return sortedInstances;
    }

    @Override
    public int hashCode() {
        return name.hashCode();
    }

    @Override
    public boolean equals(Object o) {
        return o instanceof Host && ((Host) o).name.equals(name);
    }

    /**
     * The host name.
     */
    public final String name;

    /**
     * The immutable set of instances associated with this host.
     */
    public final ImmutableSet<String> instances;
}