001    /*
002     *    GeoAPI - Java interfaces for OGC/ISO standards
003     *    http://www.geoapi.org
004     *
005     *    Copyright (C) 2007-2012 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.filter.capability;
033    
034    import java.util.Collection;
035    
036    /**
037     * Supported comparison operators in a filter capabilities document.
038     * <p>
039     * <pre>
040     * &lt;xsd:complexType name="ComparisonOperatorsType">
041     *     &lt;xsd:sequence maxOccurs="unbounded">
042     *        &lt;xsd:element name="ComparisonOperator" type="ogc:ComparisonOperatorType"/>
043     *     &lt;/xsd:sequence>
044     *  &lt;/xsd:complexType>
045     * </pre>
046     * </p>
047     * @author Justin Deoliveira, The Open Planning Project
048     *
049     */
050    public interface ComparisonOperators {
051    
052        /**
053         * Provided comparison operators.
054         * <p>
055         *  <pre>
056         *  &lt;xsd:element name="ComparisonOperator" type="ogc:ComparisonOperatorType"/>
057         *  </pre>
058         * </p>
059         */
060        Collection<Operator> getOperators();
061    
062        /**
063         * Looks up an operator by name, returning null if no such operator found.
064         *
065         * @param name the name of the operator.
066         *
067         * @return The operator, or null.
068         */
069        Operator getOperator( String name );
070    }