/*
 *    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.referencing.operation;

import java.util.Set;
import org.opengis.metadata.Identifier;
import org.opengis.referencing.AuthorityFactory;
import org.opengis.referencing.FactoryException;
import org.opengis.referencing.NoSuchAuthorityCodeException;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.annotation.UML;

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


/**
 * Creates coordinate transformation objects from codes. The codes are maintained by an
 * external authority. A commonly used authority is <A HREF="http://www.epsg.org">EPSG</A>,
 * which is also used in the GeoTIFF standard.
 *
 *
 * @source $URL: http://svn.osgeo.org/geotools/trunk/modules/library/opengis/src/main/java/org/opengis/referencing/operation/CoordinateOperationAuthorityFactory.java $
 * @version <A HREF="http://www.opengis.org/docs/01-009.pdf">Implementation specification 1.0</A>
 * @author  Martin Desruisseaux (IRD)
 * @since   GeoAPI 1.0
 */
@UML(identifier="CT_CoordinateTransformationAuthorityFactory", specification=OGC_01009)
public interface CoordinateOperationAuthorityFactory extends AuthorityFactory {
    /**
     * Creates an operation from a single operation code. The "{@linkplain Identifier#getAuthority
     * authority}" and "{@linkplain Identifier#getCode code}" values of the created object will be
     * set to the authority of this object, and the code specified by the client, respectively. The
     * other metadata values may or may not be set.
     *
     * @param  code Coded value for transformation.
     * @return The operation for the given code.
     * @throws NoSuchAuthorityCodeException if the specified {@code code} was not found.
     * @throws FactoryException if the object creation failed for some other reason.
     */
    @UML(identifier="createFromTransformationCode", specification=OGC_01009)
    CoordinateOperation createCoordinateOperation(String code)
            throws NoSuchAuthorityCodeException, FactoryException;

    /**
     * Creates operations from {@linkplain CoordinateReferenceSystem coordinate reference system}
     * codes. This method returns only the operations declared by the authority, with preferred
     * operations first. This method doesn't need to compute operations from {@code source} to
     * {@code target} CRS if no such operations were explicitly defined in the authority database.
     * Computation of arbitrary operations can be performed by
     * <code>{@linkplain CoordinateOperationFactory#createOperation(CoordinateReferenceSystem,
     * CoordinateReferenceSystem) CoordinateOperationFactory.createOperation}(sourceCRS, targetCRS)</code>
     * instead.
     *
     * @param  sourceCRS   Coded value of source coordinate reference system.
     * @param  targetCRS   Coded value of target coordinate reference system.
     * @return The operations from {@code sourceCRS} to {@code targetCRS}.
     * @throws NoSuchAuthorityCodeException if a specified code was not found.
     * @throws FactoryException if the object creation failed for some other reason.
     */
    @UML(identifier="createFromCoordinateSystemCodes", specification=OGC_01009)
    Set<CoordinateOperation> createFromCoordinateReferenceSystemCodes(String sourceCRS, String targetCRS)
            throws NoSuchAuthorityCodeException, FactoryException;
}