/** Unpacks a resource to a temp. file */
public static File unpackInstaller(String resourceName) {
// Array to hold all results (this code is slightly more
// generally that it needs to be)
File[] results = new File[1];
URL[] urls = new URL[1];
// Determine size of download
ClassLoader cl = Main.class.getClassLoader();
urls[0] = cl.getResource(Config.getInstallerResource());
if (urls[0] == null) {
Config.trace("Could not find resource: " + Config.getInstallerResource());
return null;
}
int totalSize = 0;
int totalRead = 0;
for (int i = 0; i < urls.length; i++) {
if (urls[i] != null) {
try {
URLConnection connection = urls[i].openConnection();
totalSize += connection.getContentLength();
} catch (IOException ioe) {
Config.trace("Got exception: " + ioe);
return null;
}
}
}
// Unpack each file
for (int i = 0; i < urls.length; i++) {
if (urls[i] != null) {
// Create temp. file to store unpacked file in
InputStream in = null;
OutputStream out = null;
try {
// Use extension from URL (important for dll files)
String extension = new File(urls[i].getFile()).getName();
int lastdotidx = (extension != null) ? extension.lastIndexOf('.') : -1;
if (lastdotidx == -1) {
extension = ".dat";
} else {
extension = extension.substring(lastdotidx);
}
// Create output stream
results[i] = File.createTempFile("jre", extension);
results[i].deleteOnExit();
out = new FileOutputStream(results[i]);
// Create inputstream
URLConnection connection = urls[i].openConnection();
in = connection.getInputStream();
int read = 0;
byte[] buf = new byte[BUFFER_SIZE];
while ((read = in.read(buf)) != -1) {
out.write(buf, 0, read);
// Notify delegate
totalRead += read;
if (totalRead > totalSize && totalSize != 0) totalSize = totalRead;
// Update UI
if (totalSize != 0) {
int percent = (100 * totalRead) / totalSize;
setStepText(STEP_UNPACK, Config.getWindowStepProgress(STEP_UNPACK, percent));
}
}
} catch (IOException ie) {
Config.trace("Got exception while downloading resource: " + ie);
for (int j = 0; j < results.length; j++) {
if (results[j] != null) results[j].delete();
}
return null;
} finally {
try {
if (in != null) in.close();
if (out != null) out.close();
} catch (IOException io) {
/* ignore */
}
}
}
}
setStepText(STEP_UNPACK, Config.getWindowStep(STEP_UNPACK));
return results[0];
}
