/*
 * Copyright 2015 Open Networking Laboratory
 *
 * 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 org.onosproject.incubator.net.meter;

import static com.google.common.base.Preconditions.checkArgument;

/**
 * A representation of a meter id.
 * Uniquely identifies a meter for a given device.
 */
public final class MeterId {

    static final long MAX = 0xFFFF0000;

    private final int id;

    public static final MeterId SLOWPATH = new MeterId(0xFFFFFFFD);
    public static final MeterId CONTROLLER = new MeterId(0xFFFFFFFE);
    public static final MeterId ALL = new MeterId(0xFFFFFFFF);

    private MeterId(int id) {
        checkArgument(id <= MAX, "id cannot be larger than 0xFFFF0000");
        this.id = id;
    }

    /**
     * The integer representation of the meter id.
     *
     * @return an integer
     */
    public int id() {
        return id;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        MeterId meterId = (MeterId) o;

        return id == meterId.id;

    }

    @Override
    public int hashCode() {
        return id;
    }

    public static MeterId meterId(int id) {
        return new MeterId(id);

    }

}