/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2011, Open Source Geospatial Foundation (OSGeo)
* (C) 2004-2005, Open Geospatial Consortium Inc.
*
* All Rights Reserved. http://www.opengis.org/legal/
*/
package org.opengis.metadata.extent;
import java.util.Collection;
import org.opengis.util.InternationalString;
import org.opengis.annotation.UML;
import static org.opengis.annotation.Obligation.*;
import static org.opengis.annotation.Specification.*;
/**
* Information about spatial, vertical, and temporal extent.
* This interface has four optional attributes
* ({@linkplain #getGeographicElements geographic elements},
* {@linkplain #getTemporalElements temporal elements}, and
* {@linkplain #getVerticalElements vertical elements}) and an element called
* {@linkplain #getDescription description}.
* At least one of the four shall be used.
*
*
* @source $URL: http://svn.osgeo.org/geotools/trunk/modules/library/opengis/src/main/java/org/opengis/metadata/extent/Extent.java $
* @version <A HREF="http://www.opengeospatial.org/standards/as#01-111">ISO 19115</A>
* @author Martin Desruisseaux (IRD)
* @since GeoAPI 1.0
*/
@UML(identifier="EX_Extent", specification=ISO_19115)
public interface Extent {
/**
* Returns the spatial and temporal extent for the referring object.
*
* @return The spatial and temporal extent, or {@code null} in none.
*/
@UML(identifier="description", obligation=CONDITIONAL, specification=ISO_19115)
InternationalString getDescription();
/**
* Provides geographic component of the extent of the referring object
*
* @return The geographic extent, or an empty set if none.
*/
@UML(identifier="geographicElement", obligation=CONDITIONAL, specification=ISO_19115)
Collection<? extends GeographicExtent> getGeographicElements();
/**
* Provides temporal component of the extent of the referring object
*
* @return The temporal extent, or an empty set if none.
*/
@UML(identifier="temporalElement", obligation=CONDITIONAL, specification=ISO_19115)
Collection<? extends TemporalExtent> getTemporalElements();
/**
* Provides vertical component of the extent of the referring object
*
* @return The vertical extent, or an empty set if none.
*/
@UML(identifier="verticalElement", obligation=CONDITIONAL, specification=ISO_19115)
Collection<? extends VerticalExtent> getVerticalElements();
}