root / branches / Mobile_Compatible_Hito_1 / libFMap / src / es / prodevelop / gvsig / mobile / fmap / util / download / DownloadTask.java @ 21606
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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) 2006 Prodevelop 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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* http://www.gvsig.gva.es
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*
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* or
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*
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* Prodevelop Integraci?n de Tecnolog?as SL
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* Conde Salvatierra de ?lava , 34-10
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* 46004 Valencia
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* Spain
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*
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* +34 963 510 612
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* +34 963 510 968
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* gis@prodevelop.es
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* http://www.prodevelop.es
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*
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* or
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*
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* Instituto de Rob?tica
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* Apartado de correos 2085
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* 46071 Valencia
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* (Spain)
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*
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* +34 963 543 577
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* jjordan@robotica.uv.es
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* http://robotica.uv.es
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*
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*/
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package es.prodevelop.gvsig.mobile.fmap.util.download; |
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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.FileOutputStream; |
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import java.io.InputStream; |
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import java.net.URL; |
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import java.util.ArrayList; |
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import org.apache.log4j.Logger; |
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/**
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* This class is used to download resources in a separate thread, so it can be cancelled.
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*
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* @see es.prodevelop.gvsig.mobile.fmap.util.download.Downloader
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*
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* @author jldominguez
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*
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*/
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public class DownloadTask implements Runnable { |
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private static Logger logger = Logger.getLogger(DownloadTask.class); |
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public static final int BYTE_ARRAY = 0; |
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public static final int FILE = 1; |
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private URL url = null; |
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private String ext = "tmp"; |
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private File destFile = null; |
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private Object returned_obj = null; |
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private int down_type = FILE; |
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private boolean go_on = true; |
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private boolean done = false; |
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/**
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*
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* @return whether the download is finished
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*/
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public boolean isDone() { |
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return done;
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} |
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/**
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* Constructor
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* @param u the URL
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* @param exte the local file extension
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* @param _type whether it is a file download or an array of bytes
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* @param dest_file destination file
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*/
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public DownloadTask(URL u, String exte, int _type, File dest_file) { |
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url = u; |
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ext = exte; |
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down_type = _type; |
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destFile = dest_file; |
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} |
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/**
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* Switches the state to cancelled, so the download should be cancelled
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*
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*/
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public void cancel() { |
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go_on = false;
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} |
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/**
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* @see java.lang.Runnable#run()
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*/
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public void run() { |
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// ---------------------------------------- bytes
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if (down_type == BYTE_ARRAY) {
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ArrayList byteArraysList = new ArrayList(); |
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try {
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byte[] buffer = new byte[1024*4]; |
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DataInputStream is = new DataInputStream(url.openStream()); |
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int full_size = 0; |
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for (int i = is.read(buffer); i>0; i = is.read(buffer)) { |
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if (!go_on) {
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returned_obj = null;
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return;
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} |
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byteArraysList.add(new Integer(i)); |
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byteArraysList.add(buffer.clone()); |
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full_size = full_size + i; |
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if (!go_on) {
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returned_obj = null;
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return;
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} |
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} |
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byteArraysList.add(new Integer(full_size)); |
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} catch (Exception e) { |
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logger.error("While downloading: " + e.getMessage());
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returned_obj = null;
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done = true;
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return;
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} |
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returned_obj = mergeBytes(byteArraysList); |
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done = true;
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return;
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} |
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// ---------------------------------------- file
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if (down_type == FILE) {
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logger.debug("Downloading to FILE this url: " + url.toString());
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logger.debug("Destination path is: " + destFile.getAbsolutePath());
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DataOutputStream dos;
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if (!go_on) {
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returned_obj = null;
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return;
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} |
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try {
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logger.debug("Getting file: File does not exist...");
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if (!go_on) {
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returned_obj = null;
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return;
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} |
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if (!destFile.getParentFile().exists()) {
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logger.debug("Parent did not exist!");
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destFile.getParentFile().mkdirs(); |
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} else {
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logger.debug("Parent existed!");
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} |
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destFile.createNewFile(); |
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dos = new DataOutputStream( new BufferedOutputStream(new FileOutputStream(destFile))); |
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byte[] buffer = new byte[1024*4]; |
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// ByteBuffer bff;
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logger.debug("Opening stream...");
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InputStream inp_str = url.openStream();
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logger.debug("Opening stream... done");
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DataInputStream is = new DataInputStream(inp_str); |
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if (!go_on) {
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returned_obj = null;
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return;
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} |
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long read = 0; |
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for (int i = is.read(buffer); i>0; i = is.read(buffer)) { |
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if (!go_on) {
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returned_obj = null;
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return;
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} |
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dos.write(buffer, 0, i);
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read += i; |
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if (!go_on) {
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returned_obj = null;
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return;
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} |
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} |
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inp_str.close(); |
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dos.close(); is.close(); |
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is = null; dos = null; |
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inp_str = null;
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} catch (Exception e) { |
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logger.error("While downloading: " + e.getMessage());
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returned_obj = null;
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done = true;
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return;
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} |
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returned_obj = destFile; |
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done = true;
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return;
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} |
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returned_obj = null;
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done = true;
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} |
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/**
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*
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* @return the result object (file or byte array)
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*/
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public Object getDownloadedObject() { |
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return returned_obj;
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} |
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private byte[] mergeBytes(ArrayList byteArraysList) { |
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int array_size = byteArraysList.size();
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int total_size = ((Integer) byteArraysList.get(array_size - 1)).intValue(); |
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int n = array_size / 2; |
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int item_size = 0; |
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byte[] item_bytes = null; |
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byte[] resp = new byte[total_size]; |
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if (! go_on) {
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return null; |
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} |
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int index = 0; |
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for (int i=0; i<n; i++) { |
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if (! go_on) {
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return null; |
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} |
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item_size = ((Integer) byteArraysList.get(2 * i)).intValue(); |
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item_bytes = (byte[]) byteArraysList.get(2 * i + 1); |
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System.arraycopy(item_bytes, 0, resp, index, item_size); |
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index = index + item_size; |
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if (! go_on) {
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return null; |
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} |
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} |
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return resp;
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} |
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} |