/**
* Creates a copy of this configuration. The new configuration object will contain the same
* properties as the original, but it will lose any connection to a source file (if one exists);
* this includes setting the source URL, base path, and file name to <b>null</b>. This is done to
* avoid race conditions if both the original and the copy are modified and then saved.
*
* @return the copy
* @since 1.3
*/
public Object clone() {
AbstractFileConfiguration copy = (AbstractFileConfiguration) super.clone();
copy.setBasePath(null);
copy.setFileName(null);
copy.initReloadingStrategy();
return copy;
}
/**
* Load the configuration from the specified URL. This does not change the source of the
* configuration (i.e. the internally maintained file name). Use on of the setter methods for this
* purpose.
*
* @param url the URL of the file to be loaded
* @throws ConfigurationException if an error occurs
*/
public void load(URL url) throws ConfigurationException {
if (sourceURL == null) {
if (StringUtils.isEmpty(getBasePath())) {
// ensure that we have a valid base path
setBasePath(url.toString());
}
sourceURL = url;
}
// throw an exception if the target URL is a directory
File file = ConfigurationUtils.fileFromURL(url);
if (file != null && file.isDirectory()) {
throw new ConfigurationException("Cannot load a configuration from a directory");
}
InputStream in = null;
try {
in = url.openStream();
load(in);
} catch (ConfigurationException e) {
throw e;
} catch (Exception e) {
throw new ConfigurationException("Unable to load the configuration from the URL " + url, e);
} finally {
// close the input stream
try {
if (in != null) {
in.close();
}
} catch (IOException e) {
getLogger().warn("Could not close input stream", e);
}
}
}
/**
* Set the location of this configuration as a URL. For loading this can be an arbitrary URL with
* a supported protocol. If the configuration is to be saved, too, a URL with the "file"
* protocol should be provided.
*
* @param url the location of this configuration as URL
*/
public void setURL(URL url) {
setBasePath(ConfigurationUtils.getBasePath(url));
setFileName(ConfigurationUtils.getFileName(url));
sourceURL = url;
}
/**
* Set the file where the configuration is stored. The passed in file is made absolute if it is
* not yet. Then the file's path component becomes the base path and its name component becomes
* the file name.
*
* @param file the file where the configuration is stored
*/
public void setFile(File file) {
sourceURL = null;
setFileName(file.getName());
setBasePath((file.getParentFile() != null) ? file.getParentFile().getAbsolutePath() : null);
}
