storm-client/src/jvm/org/apache/storm/container/cgroup/Device.java

/**
 * 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.storm.container.cgroup;

/**
 * a class that represents a device in linux.
 */
public class Device {

    public final int major;
    public final int minor;

    public Device(int major, int minor) {
        this.major = major;
        this.minor = minor;
    }

    public Device(String str) {
        String[] strArgs = str.split(":");
        this.major = Integer.valueOf(strArgs[0]);
        this.minor = Integer.valueOf(strArgs[1]);
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append(major).append(":").append(minor);
        return sb.toString();
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + major;
        result = prime * result + minor;
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        Device other = (Device) obj;
        if (major != other.major) {
            return false;
        }
        if (minor != other.minor) {
            return false;
        }
        return true;
    }
}