Duration.java

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/* Copyright 2010, Object Management Group, Inc.
 * Copyright 2010, PrismTech, Inc.
 * Copyright 2010, Real-Time Innovations, Inc.
 * All rights reserved.
 *
 * 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.omg.dds.core;

import java.io.Serializable;
import java.util.concurrent.TimeUnit;

import org.omg.dds.type.Extensibility;
import org.omg.dds.type.Nested;


@Extensibility(Extensibility.Kind.FINAL_EXTENSIBILITY)
@Nested
public abstract class Duration
implements Comparable<Duration>, Serializable, DDSObject
{
    // -----------------------------------------------------------------------
    // Private Constants
    // -----------------------------------------------------------------------

    private static final long serialVersionUID = 6926514364942353575L;



    // -----------------------------------------------------------------------
    // Factory Methods
    // -----------------------------------------------------------------------

    public static Duration newDuration(
            long duration,
            TimeUnit unit,
            ServiceEnvironment env)
    {
        if (env == null) {
            throw new IllegalArgumentException(
                    "Invalid ServiceEnvironment (null) provided.");
        }
        return env.getSPI().newDuration(duration, unit);
    }


    public static Duration infiniteDuration(ServiceEnvironment env)
    {
        if (env == null) {
            throw new IllegalArgumentException(
                    "Invalid ServiceEnvironment (null) provided.");
        }
        return env.getSPI().infiniteDuration();
    }


    public static Duration zeroDuration(ServiceEnvironment env)
    {
        if (env == null) {
            throw new IllegalArgumentException(
                    "Invalid ServiceEnvironment (null) provided.");
        }
        return env.getSPI().zeroDuration();
    }



    // -----------------------------------------------------------------------
    // Instance Methods
    // -----------------------------------------------------------------------

    // --- Data access: ------------------------------------------------------

    public abstract long getDuration(TimeUnit inThisUnit);

    public abstract long getRemainder(
            TimeUnit primaryUnit, TimeUnit remainderUnit);


    // --- Query: ------------------------------------------------------------

    public abstract boolean isZero();

    public abstract boolean isInfinite();


    // --- Manipulation: -----------------------------------------------------

    public abstract Duration add(Duration duration);

    public abstract Duration add(long duration, TimeUnit unit);

    public abstract Duration subtract(Duration duration);

    public abstract Duration subtract(long duration, TimeUnit unit);
}