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Standard interfaces implemented throughout the library.

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/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2011, Open Source Geospatial Foundation (OSGeo)
 *    (C) 2003-2005, Open Geospatial Consortium Inc.
 *
 *    All Rights Reserved. http://www.opengis.org/legal/
 */
package org.opengis.geometry.aggregate;

import static org.opengis.annotation.Obligation.*;
import static org.opengis.annotation.Specification.*;

import java.util.Set;
import org.opengis.annotation.UML;
import org.opengis.geometry.primitive.OrientableCurve;

/**
 * An aggregate class containing only instances of {@link OrientableCurve}. The association role
 * {@link #getElements element} shall be the set of {@linkplain OrientableCurve orientable curves}
 * contained in this {@code MultiCurve}.
 *
 * @version ISO 19107
 * @author Sanjay Jena
 * @author Prof. Dr. Jackson Roehrig
 * @since GeoAPI 2.1
 */
@UML(identifier = "GM_MultiCurve", specification = ISO_19107)
public interface MultiCurve extends MultiPrimitive {
    /**
     * Returns the set containing the {@linkplain OrientableCurve orientable curves} that compose
     * this {@code MultiCurve}. The set may be modified if this geometry {@linkplain #isMutable is
     * mutable}.
     *
     * @return The set containing the orientable curves.
     */
    @UML(identifier = "element", obligation = MANDATORY, specification = ISO_19107)
    Set getElements();

    /**
     * Returns the accumulated length of all {@linkplain OrientableCurve orientable curves}
     * contained in this {@code MultiCurve}.
     *
     * @return The accumulated length.
     */
    @UML(identifier = "length", obligation = MANDATORY, specification = ISO_19107)
    double length();
}