001    /*
002     *    GeoAPI - Java interfaces for OGC/ISO standards
003     *    http://www.geoapi.org
004     *
005     *    Copyright (C) 2006-2012 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.feature;
033    
034    /**
035     * FeatureVisitor interface to allow for container optimised traversal.
036     * <p>
037     * The iterator construct from the Collections api is well understood and
038     * loved, but breaks down for working with large GIS data volumes. By using a
039     * visitor we allow the implementor of a Feature Collection to make use of
040     * additional resources (such as multiple processors or tiled data)
041     * concurrently.
042     * </p>
043     * This interface is most often used for calculations and data
044     * transformations and an implementations may intercept known visitors
045     * (such as "bounds" or reprojection) and engage an alternate work flow.
046     * </p>
047     * @author Cory Horner (Refractions Research, Inc)
048     */
049    public interface FeatureVisitor {
050        /**
051         * Visit the provided feature.
052         * <p>
053         * Please consult the documentation for the FeatureCollection you are visiting
054         * to learn more - the provided feature may be invalid, or read only.
055         * @param feature
056         */
057        void visit(Feature feature);
058    }