/*
 *    GeoTools - OpenSource mapping toolkit
 *    http://geotools.org
 *    (C) 2004-2006, GeoTools Project Managment Committee (PMC)
 *    
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 */
package org.geotools.data.crs;

import java.io.IOException;
import java.util.Set;

import org.geotools.factory.Factory;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.referencing.crs.CRSAuthorityFactory;

/**
 * This is a marker used to allow CRSService to dynamically locate
 * implementations of CoordinateSystemAuthorityFactory.
 * <p>
 * When the time comes CRSService can switch over to
 * org.geotools.referencing.Factory - that time is not now.
 * </p>
 * @author Jody Garnett
 *
 * @deprecated Now replaced by {@link CRSAuthorityFactory}.
 * @source $URL: http://svn.geotools.org/geotools/tags/2.4.1/modules/library/main/src/main/java/org/geotools/data/crs/CRSAuthoritySpi.java $
 */
public interface CRSAuthoritySpi extends Factory {
    /**
     * Provides the complete set of codes managed by this CRSAuthority.
     * <p>
     * Note these codes are will include any authority information such
     * as EPSG or AUTO.
     * </p>
     * 
     * @return Set of codes used to identify CRS provided by this Factory.
     */
    public Set getCodes();
    
    /**
     * Provide access to the low-level decoding system provided by this Factory.
     * <p>
     * This method is provided to allow access to parser (WKT/XML/?) used by
     * this Authority in a seemless manner.
     * </p>
     * <p>
     * What purpose this servers is unclear to me since the EPSG code will not be
     * known for the resulting CoordinateReferenceSystem.
     * </p>
     * 
     * @param encoding
     * @return CoordinateReferenceSystem for the encoding or null if encoding was unsuitable
     * @throws IOException If the encoding should of been parsable but contained an error
     *
     * @deprecated Replaced by {@link CRSAuthorityFactory#createCoordinateReferenceSystem}.
     */
    public CoordinateReferenceSystem decode( String encoding ) throws IOException;
    
}
