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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) 2004-2008, 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.data.ows;

import java.net.URL;

/**
 * Each Open Web Service typically defines an operation that describes what operations it supports
 * and what data it holds. The document describing this information is usually called the
 * Capabilities document, and is usually accessed using the GetCapabilities operation.
 *
 * This class provides a basic building block for clients to implement their
 * GetCapabilitiesRequest. It automatically sets the REQUEST parameter to "GetCapabilities".
 *
 * @author rgould
 */
public abstract class AbstractGetCapabilitiesRequest extends AbstractRequest
        implements GetCapabilitiesRequest {
    /** Represents the SERVICE parameter */
    public static final String SERVICE = "SERVICE"; // $NON-NLS-1$

    public AbstractGetCapabilitiesRequest(URL serverURL) {
        super(serverURL, null);
    }

    /**
     * Sets the REQUEST parameter
     *
     * Subclass can override if needed.
     */
    protected void initRequest() {
        setProperty(REQUEST, "GetCapabilities"); // $NON-NLS-1$
    }
}