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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.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;

public class LoggingHTTPClient extends DelegateHTTPClient {

    private String charsetName;
    private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
    private static final Logger LOGGER = Logger.getLogger("org.geotools.data.ows.httpclient");

    public LoggingHTTPClient(HTTPClient delegate) {
        this(delegate, "UTF-8");
    }

    public LoggingHTTPClient(HTTPClient delegate, String charsetName) {
        super(delegate);
        this.charsetName = charsetName;
    }

    @Override
    public HTTPResponse post(URL url, InputStream postContent, String postContentType)
            throws IOException {
        if (LOGGER.isLoggable(Level.FINEST)) {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            copy(postContent, out);
            LOGGER.finest("POST Request URL: " + url);
            LOGGER.finest("POST Request Body: \n" + out.toString(charsetName));

            return new LoggingHTTPResponse(
                    delegate.post(
                            url, new ByteArrayInputStream(out.toByteArray()), postContentType),
                    charsetName);
        } else {
            return delegate.post(url, postContent, postContentType);
        }
    }

    @Override
    public HTTPResponse get(URL url) throws IOException {
        if (LOGGER.isLoggable(Level.FINEST)) {
            LOGGER.finest("GET Request URL: " + url);
            return new LoggingHTTPResponse(delegate.get(url), charsetName);
        } else {
            return delegate.get(url);
        }
    }

    public static void copy(InputStream input, OutputStream output) throws IOException {
        byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
        int n = 0;
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
        }
    }

    class LoggingHTTPResponse extends DelegateHTTPResponse {

        private InputStream input;

        public LoggingHTTPResponse(HTTPResponse delegate, String charsetName) throws IOException {
            super(delegate);

            ByteArrayOutputStream output = new ByteArrayOutputStream();
            LoggingHTTPClient.copy(delegate.getResponseStream(), output);
            LOGGER.finest("Response: \n" + output.toString(charsetName));

            input = new ByteArrayInputStream(output.toByteArray());
        }

        @Override
        public InputStream getResponseStream() throws IOException {
            return input;
        }
    }
}