svn-gvsig-desktop / tags / v1_1_Build_1011 / libraries / libRemoteServices / src / org / gvsig / remoteClient / utils / Utilities.java @ 12904
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package org.gvsig.remoteClient.utils; |
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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import java.io.BufferedOutputStream; |
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import java.io.DataInputStream; |
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import java.io.DataOutputStream; |
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import java.io.File; |
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import java.io.FileNotFoundException; |
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import java.io.FileOutputStream; |
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import java.io.FileReader; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.OutputStream; |
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import java.net.ConnectException; |
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import java.net.URL; |
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import java.net.UnknownHostException; |
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import java.rmi.NoSuchObjectException; |
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import java.util.Hashtable; |
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import java.util.StringTokenizer; |
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import java.util.Vector; |
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import org.gvsig.remoteClient.wms.ICancellable; |
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import sun.nio.cs.ext.ISCII91; |
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/**
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* Clase con m?todos de utilidad en el protocolo WMS
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*
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* @authors Laura D?az, jaume dominguez faus
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*/
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public class Utilities { |
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private static String characters; |
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static final long latency = 500; |
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/**
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* Used to cancel a group of files
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* <b>key</b>: Group id, <b>value</b>: Boolean (true if
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* the group has to be canceled. Otherwise it is
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* false)
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*/
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static Hashtable canceledGroup = new Hashtable(); |
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/**
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* <b>key</b>: URL, <b>value</b>: path to the downloaded file.
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*/
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private static Hashtable downloadedFiles; |
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static Exception downloadException; |
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private static final String tempDirectoryPath = System.getProperty("java.io.tmpdir")+"/tmp-andami"; |
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static {
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characters = "";
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for (int j = 32; j<=127; j++){ |
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characters += (char) j;
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} |
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characters += "?????????????????????????????????????????????????\n\r\f\t??";
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} |
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/**
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* Checks a File and tries to figure if the file is a text or a binary file.<br>
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* Keep in mind that binary files are those that contains at least one
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* non-printable character.
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*
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* @param file
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* @return <b>true</b> when the file is <b>pretty problably</b> text,
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* <b>false</b> if the file <b>is</b> binary.
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*/
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public static boolean isTextFile(File file){ |
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return isTextFile(file, 1024); |
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} |
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/**
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* Checks a File and tries to figure if the file is a text or a binary file.<br>
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* Keep in mind that binary files are those that contains at least one
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* non-printable character.
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*
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* @param file
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* @param byteAmount, number of bytes to check.
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* @return <b>true</b> when the file is <b>pretty problably</b> text,
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* <b>false</b> if the file <b>is</b> binary.
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*/
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public static boolean isTextFile(File file, int byteAmount){ |
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int umbral = byteAmount;
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try {
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FileReader fr = new FileReader(file); |
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for (int i = 0; i < umbral; i++) { |
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int c = fr.read();
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if (c==-1){ |
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// End of file. If we reach this
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// everything before is printable data.
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return true; |
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} |
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char ch = (char) c; |
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if (characters.indexOf(ch)==-1){ |
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// We've found a non-printable character.
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// Then we'll assume that this file is binary.
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return false; |
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} |
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} |
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} catch (FileNotFoundException e) { |
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e.printStackTrace(); |
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} catch (IOException e) { |
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e.printStackTrace(); |
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} |
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return true; |
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} |
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/**
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* Checks a byte array and tells if it contains only text or contains
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* any binary data.
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*
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* @param file
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* @return <b>true</b> when the data is <b>only</b> text, <b>false</b> otherwise.
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* @deprecated
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*/
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public static boolean isTextData(byte[] data){ |
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char[] charData = new char[data.length]; |
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for (int i = 0; i<data.length; i++){ |
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charData[i] = (char) data[i];
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} |
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for (int i = 0; i < data.length; i++) { |
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int c = charData[i];
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if (c==-1){ |
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// End of file. If we reach this
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// everything before is printable data.
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return true; |
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} |
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char ch = (char) c; |
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if (characters.indexOf(ch)==-1){ |
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// We've found a non-printable character.
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// Then we'll assume that this file is binary.
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//System.out.println(ch+" at "+i);
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return false; |
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} |
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} |
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return true; |
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} |
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/**
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* Copia el contenido de un InputStream en un OutputStream
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*
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* @param in InputStream
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* @param out OutputStream
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*/
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public static void serializar(InputStream in, OutputStream out) { |
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byte[] buffer = new byte[102400]; |
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int n;
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try {
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while ((n = in.read(buffer)) != -1) { |
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out.write(buffer, 0, n);
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} |
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} catch (IOException e) { |
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e.printStackTrace(); |
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} |
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} |
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/**
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* Elimina del xml la declaraci?n del DTD
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*
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* @param bytes bytes del fichero XML de respuesta a getCapabilities
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* @param startTag Tag raiz del xml respuesta a getCapabilities
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*
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* @return bytes del fichero XML sin la declaraci?n del DTD
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*/
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public static byte[] eliminarDTD(byte[] bytes, String startTag) { |
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String text = new String(bytes); |
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int index1 = text.indexOf("?>") + 2; |
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int index2;
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try {
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index2 = findBeginIndex(bytes, startTag); |
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} catch (NoSuchObjectException e) { |
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return bytes;
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} |
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byte[] buffer = new byte[bytes.length - (index2 - index1)]; |
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System.arraycopy(bytes, 0, buffer, 0, index1); |
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System.arraycopy(bytes, index2, buffer, index1, bytes.length - index2);
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return buffer;
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} |
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/**
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* Obtiene el ?ndice del comienzo del xml
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*
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* @param bytes bytes del fichero XML en el que se busca
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* @param tagRaiz Tag raiz del xml respuesta a getCapabilities
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*
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* @return ?ndice donde empieza el tag raiz
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*
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* @throws NoSuchObjectException Si no se encuentra el tag
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*/
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private static int findBeginIndex(byte[] bytes, String tagRaiz) |
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throws NoSuchObjectException { |
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try {
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int nodo = 0; |
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int ret = -1; |
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int i = 0; |
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while (true) { |
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switch (nodo) {
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case 0: |
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if (bytes[i] == '<') { |
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ret = i; |
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nodo = 1;
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} |
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break;
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case 1: |
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if (bytes[i] == ' ') { |
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} else if (bytes[i] == tagRaiz.charAt(0)) { |
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nodo = 2;
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} else {
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nodo = 0;
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} |
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break;
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case 2: |
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String aux = new String(bytes, i, 18); |
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if (aux.equalsIgnoreCase(tagRaiz.substring(1))) { |
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return ret;
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} |
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nodo = 0;
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break;
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} |
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i++; |
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} |
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} catch (Exception e) { |
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throw new NoSuchObjectException("No se pudo parsear el xml"); |
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} |
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} |
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/**
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* Converts the contents of a Vector to a comma separated list
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*
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* */
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public static String Vector2CS(Vector v) |
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{ |
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String str = new String(); |
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if (v != null) |
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{ |
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int i;
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for (i=0; i<v.size() ;i++) |
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{ |
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str = str + v.elementAt(i); |
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if (i<v.size()-1) |
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str = str + ",";
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} |
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} |
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return str;
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} |
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public static boolean isValidVersion(String version) |
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{ |
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if(version.trim().length() == 5) |
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{ |
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if ( (version.charAt(1)=='.') && (version.charAt(3)=='.')) |
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{ |
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char x = version.charAt(0); |
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char y = version.charAt(2); |
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char z = version.charAt(4); |
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if ((Character.isDigit(x)) && (Character.isDigit(y)) && (Character.isDigit(z))) |
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{ |
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return true; |
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} |
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else
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{ |
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return false; |
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} |
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} |
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else
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{ |
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return false; |
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} |
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} |
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else
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{ |
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return false; |
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} |
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} |
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/**
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* Crea un fichero temporal con un nombre concreto y unos datos pasados por
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* par?metro.
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* @param fileName Nombre de fichero
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* @param data datos a guardar en el fichero
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*/
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public static void createTemp(String fileName, String data)throws IOException{ |
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File f = new File(fileName); |
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DataOutputStream dos = new DataOutputStream( new BufferedOutputStream(new FileOutputStream(f)) ); |
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dos.writeBytes(data); |
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dos.close(); |
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f.deleteOnExit(); |
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} |
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/**
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* Checks if a String is a number or not
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*
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* @param String, s
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* @return boolean, true if s is a number
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*/
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public static boolean isNumber(String s) |
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{ |
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try
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{ |
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//double d = Double.parseDouble(s);
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return true; |
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} |
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catch(NumberFormatException e) |
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{ |
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return false; |
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} |
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} |
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/**
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* Parses the String containing different items [character] separated and
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* creates a vector with them.
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* @param str String contains item1[c]item2[c]item3...
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* @param c is the string value for separating the items
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* @return Vector containing all the items
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*/
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public static Vector createVector(String str, String c) |
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{ |
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StringTokenizer tokens = new StringTokenizer(str, c); |
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Vector v = new Vector(); |
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try
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{ |
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while (tokens.hasMoreTokens())
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{ |
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v.addElement(tokens.nextToken()); |
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} |
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return v;
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} |
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catch (Exception e) |
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{ |
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return new Vector(); |
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} |
398 |
} |
399 |
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/**
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* @param dimensions
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* @return
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*/
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public static String Vector2URLParamString(Vector v) { |
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if (v==null) return ""; |
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String s = ""; |
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for (int i = 0; i < v.size(); i++) { |
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s += v.get(i); |
409 |
if (i<v.size()-1) |
410 |
s += "&";
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} |
412 |
return s;
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} |
414 |
|
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/**
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* Returns the content of this URL as a file from the file system.<br>
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* <p>
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* If the URL has been already downloaded in this session and notified
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* to the system using the static <b>Utilities.addDownloadedURL(URL)</b>
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* method, it can be restored faster from the file system avoiding to
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* download it again.
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* </p>
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* @param url
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* @return File containing this URL's content or null if no file was found.
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*/
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private static File getPreviousDownloadedURL(URL url){ |
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File f = null; |
428 |
if (downloadedFiles!=null && downloadedFiles.containsKey(url)){ |
429 |
String filePath = (String) downloadedFiles.get(url); |
430 |
f = new File(filePath); |
431 |
if (!f.exists())
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return null; |
433 |
} |
434 |
return f;
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435 |
} |
436 |
|
437 |
/**
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438 |
* Adds an URL to the table of downloaded files for further uses. If the URL
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* already exists in the table its filePath value is updated to the new one and
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440 |
* the old file itself is removed from the file system.
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*
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* @param url
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* @param filePath
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*/
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static void addDownloadedURL(URL url, String filePath){ |
446 |
if (downloadedFiles==null) |
447 |
downloadedFiles = new Hashtable(); |
448 |
String fileName = (String) downloadedFiles.put(url, filePath); |
449 |
//JMV: No se puede eliminar el anterior porque puede que alguien lo
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// este usando
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/*
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452 |
if (fileName!=null){
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File f = new File(fileName);
|
454 |
if (f.exists())
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f.delete();
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456 |
}
|
457 |
*/
|
458 |
} |
459 |
|
460 |
/**
|
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* Downloads an URL into a temporary file that is removed the next time the
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462 |
* tempFileManager class is called, which means the next time gvSIG is launched.
|
463 |
*
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464 |
* @param url
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465 |
* @param name
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466 |
* @return
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467 |
* @throws IOException
|
468 |
* @throws ServerErrorResponseException
|
469 |
* @throws ConnectException
|
470 |
* @throws UnknownHostException
|
471 |
*/
|
472 |
public static synchronized File downloadFile(URL url, String name, ICancellable cancel) throws IOException,ConnectException, UnknownHostException{ |
473 |
File f = null; |
474 |
|
475 |
if ((f=getPreviousDownloadedURL(url))==null){ |
476 |
File tempDirectory = new File(tempDirectoryPath); |
477 |
if (!tempDirectory.exists())
|
478 |
tempDirectory.mkdir(); |
479 |
|
480 |
f = new File(tempDirectoryPath+"/"+name+System.currentTimeMillis()); |
481 |
|
482 |
if (cancel == null) { |
483 |
cancel = new ICancellable() {
|
484 |
public boolean isCanceled() { |
485 |
return false; |
486 |
} |
487 |
public Object getID(){ |
488 |
return Utilities.class.getName(); |
489 |
} |
490 |
}; |
491 |
} |
492 |
Thread downloader = new Thread(new Downloader(url, f, cancel.getID())); |
493 |
Thread monitor = new Thread(new Monitor(cancel)); |
494 |
monitor.start(); |
495 |
downloader.start(); |
496 |
while(!getCanceled(cancel.getID()) && downloader.isAlive()) {
|
497 |
try {
|
498 |
Thread.sleep(latency);
|
499 |
} catch (InterruptedException e) { |
500 |
// TODO Auto-generated catch block
|
501 |
e.printStackTrace(); |
502 |
} |
503 |
} |
504 |
|
505 |
if (getCanceled(cancel.getID()))
|
506 |
return null; |
507 |
downloader = null;
|
508 |
monitor = null;
|
509 |
if (Utilities.downloadException!=null) { |
510 |
Exception e = Utilities.downloadException; |
511 |
if (e instanceof FileNotFoundException) |
512 |
throw (IOException) e; |
513 |
else if (e instanceof IOException) |
514 |
throw (IOException) e; |
515 |
else if (e instanceof ConnectException) |
516 |
throw (ConnectException) e; |
517 |
else if (e instanceof UnknownHostException) |
518 |
throw (UnknownHostException) e; |
519 |
} |
520 |
} else {
|
521 |
System.out.println(url.toString()+" cached at '"+f.getAbsolutePath()+"'"); |
522 |
} |
523 |
|
524 |
return f;
|
525 |
} |
526 |
|
527 |
/**
|
528 |
* Try if a group of downloads has been canceled
|
529 |
* @param groupId
|
530 |
* Group id
|
531 |
* @return
|
532 |
* If the group has been canceled
|
533 |
*/
|
534 |
protected static boolean getCanceled(Object groupId){ |
535 |
Object obj = canceledGroup.get(groupId);
|
536 |
if (obj != null){ |
537 |
return ((Boolean)obj).booleanValue(); |
538 |
} |
539 |
return false; |
540 |
} |
541 |
|
542 |
/**
|
543 |
* Cancel a group of downloads
|
544 |
* @param groupId
|
545 |
* Group id
|
546 |
* @param isCanceled
|
547 |
* if the group has to be canceled
|
548 |
*/
|
549 |
protected static void setCanceled(Object groupId, boolean isCanceled){ |
550 |
if (groupId == null){ |
551 |
groupId = Utilities.class.getName();
|
552 |
} |
553 |
canceledGroup.put(groupId,new Boolean(isCanceled)); |
554 |
} |
555 |
|
556 |
/**
|
557 |
* Cleans every temporal file previously downloaded.
|
558 |
*/
|
559 |
public static void cleanUpTempFiles() { |
560 |
try{
|
561 |
File tempDirectory = new File(tempDirectoryPath); |
562 |
|
563 |
File[] files = tempDirectory.listFiles(); |
564 |
if (files!=null) { |
565 |
for (int i = 0; i < files.length; i++) { |
566 |
// s?lo por si en un futuro se necesitan crear directorios temporales
|
567 |
if (files[i].isDirectory()) deleteDirectory(files[i]);
|
568 |
files[i].delete(); |
569 |
} |
570 |
} |
571 |
tempDirectory.delete(); |
572 |
} catch (Exception e) { } |
573 |
|
574 |
} |
575 |
/**
|
576 |
* Recursive directory delete.
|
577 |
* @param f
|
578 |
*/
|
579 |
private static void deleteDirectory(File f) { |
580 |
File[] files = f.listFiles(); |
581 |
for (int i = 0; i < files.length; i++) { |
582 |
if (files[i].isDirectory()) deleteDirectory(files[i]);
|
583 |
files[i].delete(); |
584 |
} |
585 |
|
586 |
} |
587 |
|
588 |
|
589 |
/**
|
590 |
* Remove an URL from the system cache. The file will remain in the file
|
591 |
* system for further eventual uses.
|
592 |
* @param request
|
593 |
*/
|
594 |
public static void removeURL(URL url) { |
595 |
if (downloadedFiles != null && downloadedFiles.containsKey(url)) |
596 |
downloadedFiles.remove(url); |
597 |
} |
598 |
|
599 |
|
600 |
} |
601 |
|
602 |
final class Monitor implements Runnable { |
603 |
ICancellable c; |
604 |
public Monitor(ICancellable cancel) { |
605 |
Utilities.setCanceled(cancel.getID(),false); |
606 |
this.c = cancel;
|
607 |
} |
608 |
public void run() { |
609 |
while (!c.isCanceled()){
|
610 |
try {
|
611 |
Thread.sleep(Utilities.latency); |
612 |
} catch (InterruptedException e) { |
613 |
e.printStackTrace(); |
614 |
} |
615 |
} |
616 |
|
617 |
/* WARNING!! This works because only one download is being processed at once.
|
618 |
* You could prefer to start several transfers simultaneously. If so, you
|
619 |
* should consideer using a non-static variable such is Utilities.canceled to
|
620 |
* control when and which transfer in particular has been canceled.
|
621 |
*
|
622 |
* The feature of transfer several files is at the moment under study. We are
|
623 |
* planning to add an intelligent system that will give you a lot of services
|
624 |
* and ease-of-use. So, we encourage you to wait for it instead of write your
|
625 |
* own code.
|
626 |
*/
|
627 |
|
628 |
Utilities.setCanceled(c.getID(),true); |
629 |
} |
630 |
} |
631 |
|
632 |
final class Downloader implements Runnable { |
633 |
private URL url; |
634 |
private File dstFile; |
635 |
private Object groupID = null; |
636 |
|
637 |
public Downloader(URL url, File dstFile, Object groupID) { |
638 |
this.url = url;
|
639 |
this.dstFile = dstFile;
|
640 |
this.groupID = groupID;
|
641 |
Utilities.downloadException = null; |
642 |
} |
643 |
|
644 |
public void run() { |
645 |
System.out.println("downloading '"+url.toString()+"' to: "+dstFile.getAbsolutePath()); |
646 |
|
647 |
DataOutputStream dos;
|
648 |
try {
|
649 |
dos = new DataOutputStream( new BufferedOutputStream(new FileOutputStream(dstFile))); |
650 |
byte[] buffer = new byte[1024*4]; |
651 |
DataInputStream is = new DataInputStream(url.openStream()); |
652 |
long readed = 0; |
653 |
for (int i = is.read(buffer); !Utilities.getCanceled(groupID) && i>0; i = is.read(buffer)){ |
654 |
dos.write(buffer, 0, i);
|
655 |
readed += i; |
656 |
|
657 |
} |
658 |
dos.close(); |
659 |
is.close(); |
660 |
is = null;
|
661 |
dos = null;
|
662 |
if (Utilities.getCanceled(groupID)) { |
663 |
System.err.println("[RemoteClients] '"+url+"' CANCELED."); |
664 |
dstFile.delete(); |
665 |
dstFile= null;
|
666 |
} else {
|
667 |
Utilities.addDownloadedURL(url, dstFile.getAbsolutePath());
|
668 |
} |
669 |
} catch (Exception e) { |
670 |
Utilities.downloadException = e;
|
671 |
} |
672 |
|
673 |
} |
674 |
} |