private static boolean canWrite(URL location) {
if (location != null && "file".equals(location.getProtocol())) { // $NON-NLS-1$
File locationDir = new File(location.getFile());
if (!locationDir.exists()) locationDir.mkdirs();
if (locationDir.exists() && AdaptorUtil.canWrite(locationDir)) return true;
}
return false;
}
private static String computeDefaultConfigurationLocation() {
// 1) We store the config state relative to the 'eclipse' directory if possible
// 2) If this directory is read-only
// we store the state in <user.home>/.eclipse/<application-id>_<version> where <user.home>
// is unique for each local user, and <application-id> is the one
// defined in .eclipseproduct marker file. If .eclipseproduct does not
// exist, use "eclipse" as the application-id.
URL installURL = computeInstallConfigurationLocation();
if (installURL != null && "file".equals(installURL.getProtocol())) { // $NON-NLS-1$
File installDir = new File(installURL.getFile());
File defaultConfigDir = new File(installDir, CONFIG_DIR);
if (!defaultConfigDir.exists()) defaultConfigDir.mkdirs();
if (defaultConfigDir.exists() && AdaptorUtil.canWrite(defaultConfigDir))
return defaultConfigDir.getAbsolutePath();
}
// We can't write in the eclipse install dir so try for some place in the user's home dir
return computeDefaultUserAreaLocation(CONFIG_DIR);
}
private static String getEclipseHomeLocation(String launcher) {
if (launcher == null) return null;
File launcherFile = new File(launcher);
if (launcherFile.getParent() == null) return null;
File launcherDir = new File(launcherFile.getParent());
// check for mac os; the os check is copied from EclipseEnvironmentInfo.
String macosx = org.eclipse.osgi.service.environment.Constants.OS_MACOSX;
if (macosx.equals(EclipseEnvironmentInfo.getDefault().getOS()))
launcherDir = getMacOSEclipsoeHomeLocation(launcherDir);
return (launcherDir.exists() && launcherDir.isDirectory())
? launcherDir.getAbsolutePath()
: null;
}
private static String computeDefaultUserAreaLocation(String pathAppendage) {
// we store the state in <user.home>/.eclipse/<application-id>_<version> where <user.home>
// is unique for each local user, and <application-id> is the one
// defined in .eclipseproduct marker file. If .eclipseproduct does not
// exist, use "eclipse" as the application-id.
String installProperty = FrameworkProperties.getProperty(PROP_INSTALL_AREA);
URL installURL = buildURL(installProperty, true);
if (installURL == null) return null;
File installDir = new File(installURL.getFile());
// compute an install dir hash to prevent configuration area collisions with other eclipse
// installs
int hashCode;
try {
hashCode = installDir.getCanonicalPath().hashCode();
} catch (IOException ioe) {
// fall back to absolute path
hashCode = installDir.getAbsolutePath().hashCode();
}
if (hashCode < 0) hashCode = -(hashCode);
String installDirHash = String.valueOf(hashCode);
String appName = "." + ECLIPSE; // $NON-NLS-1$
File eclipseProduct = new File(installDir, PRODUCT_SITE_MARKER);
if (eclipseProduct.exists()) {
Properties props = new Properties();
try {
props.load(new FileInputStream(eclipseProduct));
String appId = props.getProperty(PRODUCT_SITE_ID);
if (appId == null || appId.trim().length() == 0) appId = ECLIPSE;
String appVersion = props.getProperty(PRODUCT_SITE_VERSION);
if (appVersion == null || appVersion.trim().length() == 0) appVersion = ""; // $NON-NLS-1$
appName +=
File.separator
+ appId
+ "_"
+ appVersion
+ "_"
+ installDirHash; //$NON-NLS-1$ //$NON-NLS-2$
} catch (IOException e) {
// Do nothing if we get an exception. We will default to a standard location
// in the user's home dir.
// add the hash to help prevent collisions
appName += File.separator + installDirHash;
}
} else {
// add the hash to help prevent collisions
appName += File.separator + installDirHash;
}
String userHome = FrameworkProperties.getProperty(PROP_USER_HOME);
return new File(userHome, appName + "/" + pathAppendage).getAbsolutePath(); // $NON-NLS-1$
}
/**
* Returns a file from the configuration area that can be used by the framework
*
* @param filename the filename
* @return a file from the configuration area
*/
public static File getConfigurationFile(String filename) {
File dir = getOSGiConfigurationDir();
if (!dir.exists()) dir.mkdirs();
return new File(dir, filename);
}