001    /*
002     *    GeoAPI - Java interfaces for OGC/ISO standards
003     *    http://www.geoapi.org
004     *
005     *    Copyright (C) 2008-2012 Open Geospatial Consortium, Inc.
006     *    All Rights Reserved. http://www.opengeospatial.org/ogc/legal
007     *
008     *    Permission to use, copy, and modify this software and its documentation, with
009     *    or without modification, for any purpose and without fee or royalty is hereby
010     *    granted, provided that you include the following on ALL copies of the software
011     *    and documentation or portions thereof, including modifications, that you make:
012     *
013     *    1. The full text of this NOTICE in a location viewable to users of the
014     *       redistributed or derivative work.
015     *    2. Notice of any changes or modifications to the OGC files, including the
016     *       date changes were made.
017     *
018     *    THIS SOFTWARE AND DOCUMENTATION IS PROVIDED "AS IS," AND COPYRIGHT HOLDERS MAKE
019     *    NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
020     *    TO, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT
021     *    THE USE OF THE SOFTWARE OR DOCUMENTATION WILL NOT INFRINGE ANY THIRD PARTY
022     *    PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS.
023     *
024     *    COPYRIGHT HOLDERS WILL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL OR
025     *    CONSEQUENTIAL DAMAGES ARISING OUT OF ANY USE OF THE SOFTWARE OR DOCUMENTATION.
026     *
027     *    The name and trademarks of copyright holders may NOT be used in advertising or
028     *    publicity pertaining to the software without specific, written prior permission.
029     *    Title to copyright in this software and any associated documentation will at all
030     *    times remain with copyright holders.
031     */
032    package org.opengis.style;
033    
034    import org.opengis.annotation.Extension;
035    import org.opengis.annotation.XmlElement;
036    import org.opengis.filter.expression.Expression;
037    
038    /**
039     * An AnchorPoint identifies the location inside a textlabel to use as an
040     * "anchor" for positioning it relative to a point geometry.
041     *
042     * @version <A HREF="http://www.opengeospatial.org/standards/symbol">Symbology Encoding Implementation Specification 1.1.0</A>
043     * @author Open Geospatial Consortium
044     * @author Johann Sorel (Geomatys)
045     * @author Ian Turton
046     * @since GeoAPI 2.2
047     */
048    @XmlElement("AnchorPoint")
049    public interface AnchorPoint {
050    
051        /**
052         * get the x coordinate of the anchor point
053         *
054         * @return the expression which represents the X coordinate
055         */
056        @XmlElement("AnchorPointX")
057        Expression getAnchorPointX();
058    
059        /**
060         * get the y coordinate of the anchor point
061         *
062         * @return the expression which represents the Y coordinate
063         */
064        @XmlElement("AnchorPointY")
065        Expression getAnchorPointY();
066        
067        /**
068         * calls the visit method of a StyleVisitor
069         *
070         * @param visitor the style visitor
071         */
072        @Extension
073        Object accept(StyleVisitor visitor, Object extraData);
074        
075    }