/** Saves the content of a given system store to file. */
public static SystemStore save(File file, SystemStore store, boolean clearDir)
throws IOException {
if (!GRAMMAR.hasExtension(file)) {
throw new IOException(String.format("File '%s' does not refer to a production system", file));
}
// if the file already exists, rename it
// in order to be able to restore if saving fails
File newFile = null;
if (file.exists()) {
newFile = file;
do {
newFile = new File(newFile.getParent(), "Copy of " + newFile.getName());
} while (newFile.exists());
if (clearDir) {
if (!file.renameTo(newFile)) {
throw new IOException(String.format("Can't save grammar to existing file '%s'", file));
}
} else {
Util.copyDirectory(file, newFile, true);
}
}
try {
DefaultFileSystemStore result = new DefaultFileSystemStore(file, true);
result.reload();
// save properties
for (ResourceKind kind : ResourceKind.values()) {
if (kind == PROPERTIES) {
result.putProperties(store.getProperties());
} else if (kind.isTextBased()) {
result.putTexts(kind, store.getTexts(kind));
} else {
result.putGraphs(kind, store.getGraphs(kind).values(), false);
}
}
if (newFile != null) {
boolean deleted = deleteRecursive(newFile);
assert deleted : String.format("Failed to delete '%s'", newFile);
}
return result;
} catch (IOException exc) {
file.delete();
// attempt to re-rename previously existing file
if (newFile != null) {
newFile.renameTo(file);
}
throw exc;
}
}
@Override
public SystemStore save(File file, boolean clearDir) throws IOException {
return SystemStore.save(file, this, clearDir);
}