| gvSIG desktop 1

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

package com.iver.wmsclient;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.rmi.NoSuchObjectException;

/**

 * Clase con m?todos de utilidad en el protocolo WMS

 *

 * @author Fernando Gonz?lez Cort?s

 */

public class WMSUtilities {

    /**

     * Copia el contenido de un InputStream en un OutputStream

     *

     * @param in InputStream

     * @param out OutputStream

     */

    public static void serializar(InputStream in, OutputStream out) {

        byte[] buffer = new byte[102400];

        int n;

        try {

            while ((n = in.read(buffer)) != -1) {

                out.write(buffer, 0, n);

            }

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

    /**

     * Elimina del xml la declaraci?n del DTD

     *

     * @param bytes bytes del fichero XML de respuesta a getCapabilities

     * @param startTag Tag raiz del xml respuesta a getCapabilities

     *

     * @return bytes del fichero XML sin la declaraci?n del DTD

     */

    public static byte[] eliminarDTD(byte[] bytes, String startTag) {

        String text = new String(bytes);

        int index1 = text.indexOf("?>") + 2;

        int index2;

        try {

            index2 = findBeginIndex(bytes, startTag);

        } catch (NoSuchObjectException e) {

            return bytes;

        }

        byte[] buffer = new byte[bytes.length - (index2 - index1)];

        System.arraycopy(bytes, 0, buffer, 0, index1);

        System.arraycopy(bytes, index2, buffer, index1, bytes.length - index2);

        return buffer;

    }

    /**

     * Obtiene el ?ndice del comienzo del xml

     *

     * @param bytes bytes del fichero XML en el que se busca

     * @param tagRaiz Tag raiz del xml respuesta a getCapabilities

     *

     * @return ?ndice donde empieza el tag raiz

     *

     * @throws NoSuchObjectException Si no se encuentra el tag

     */

    private static int findBeginIndex(byte[] bytes, String tagRaiz)

        throws NoSuchObjectException {

        try {

            int nodo = 0;

            int ret = -1;

            int i = 0;

            while (true) {

                switch (nodo) {

                    case 0:

                        if (bytes[i] == '<') {

                            ret = i;

                            nodo = 1;

                        }

                        break;

                    case 1:

                        if (bytes[i] == ' ') {

                        } else if (bytes[i] == tagRaiz.charAt(0)) {

                            nodo = 2;

                        } else {

                            nodo = 0;

                        }

                        break;

                    case 2:

                        String aux = new String(bytes, i, 18);

                        if (aux.equalsIgnoreCase(tagRaiz.substring(1))) {

                            return ret;

                        }

                        nodo = 0;

                        break;

                }

                i++;

            }

        } catch (Exception e) {

            throw new NoSuchObjectException("No se pudo parsear el xml");

        }

    }

    public static String checkHostString(String hostString)

    {

        if (hostString.indexOf("?") == -1)

        {

            // Viene sin el interrogante

            hostString += "?";

        }

        else

        {

            if (!hostString.endsWith("?")) {

                hostString += "&";

            }

        }

        return hostString;

    }

}