statesystem/org.eclipse.tracecompass.segmentstore.core/src/org/eclipse/tracecompass/segmentstore/core/ISegment.java

/*******************************************************************************
 * Copyright (c) 2015 EfficiOS Inc., Alexandre Montplaisir
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *    Alexandre Montplaisir - Initial API and implementation
 *******************************************************************************/

package org.eclipse.tracecompass.segmentstore.core;

import java.io.Serializable;

import org.eclipse.jdt.annotation.NonNull;
import org.eclipse.tracecompass.datastore.core.interval.IHTInterval;
import org.eclipse.tracecompass.datastore.core.serialization.ISafeByteBufferWriter;

/**
 * Generic interface for any segment (like a time range) that can be used in the
 * segment store.
 *
 * @author Alexandre Montplaisir
 */
public interface ISegment extends Serializable, Comparable<@NonNull ISegment>, IHTInterval {

    @Override
    default int compareTo(@NonNull ISegment arg0) {
        return SegmentComparators.INTERVAL_START_COMPARATOR
                .thenComparing(SegmentComparators.INTERVAL_END_COMPARATOR)
                .compare(this, arg0);
    }

    /**
     * The length/duration of the segment.
     *
     * @return The duration
     */
    default long getLength() {
        return getEnd() - getStart();
    }

    /**
     * @since 2.0
     */
    @Override
    default int getSizeOnDisk() {
        return 0;
    }

    /**
     * @since 2.0
     */
    @Override
    default void writeSegment(@NonNull ISafeByteBufferWriter buffer) {

    }

}