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The main module contains the GeoTools public interfaces that are used by other GeoTools modules (and GeoTools applications). Where possible we make use industry standard terms as provided by OGC and ISO standards. The formal GeoTools public api consists of gt-metadata, jts and the gt-main module. The main module contains the default implementations that are available provided to other GeoTools modules using our factory system. Factories are obtained from an appropriate FactoryFinder, giving applications a chance configure the factory used using the Factory Hints facilities. FilterFactory ff = CommonFactoryFinder.getFilterFactory(); Expression expr = ff.add( expression1, expression2 ); If you find yourself using implementation specific classes chances are you doing it wrong: Expression expr = new AddImpl( expression1, expressiom2 );

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/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
 *
 *    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.styling;

/**
 * ImageOutline specifies how individual source rasters in a multi-raster set (such as a set of
 * satellite-image scenes) should be outlined to make the individual-image locations visible.
 *
 * <xsd:element name="ImageOutline"> <xsd:annotation> <xsd:documentation>
 * "ImageOutline" specifies how individual source rasters in a multi-raster set (such as a
 * set of satellite-image scenes) should be outlined to make the individual-image locations visible.
 * </xsd:documentation> </xsd:annotation> <xsd:complexType> <xsd:choice>
 * <xsd:element ref="sld:LineSymbolizer"/> <xsd:element ref="sld:PolygonSymbolizer"/>
 * </xsd:choice> </xsd:complexType> </xsd:element>
 *
 * @author Justin Deoliveira, The Open Planning Project
 */
public interface ImageOutline {
    /**
     * Returns the symbolizer of the image outline.
     *
     * @return One of {@see PolygonSymbolizer},{@see LineSymbolizer}.
     */
    Symbolizer getSymbolizer();

    /**
     * Sets the symbolizer of the image outline.
     *
     * @param symbolizer The new symbolizer, one of {@see PolygonSymbolizer},{@see LineSymbolizer}.
     */
    void setSymbolizer(Symbolizer symbolizer);

    void accept(org.geotools.styling.StyleVisitor visitor);
}