protected int addItem(SyncItem item) throws SyncException {
if (Log.isLoggable(Log.DEBUG)) {
Log.debug(TAG_LOG, "addItem");
}
JSONSyncItem jsonSyncItem = (JSONSyncItem) item;
try {
String fullName = getFileFullName(jsonSyncItem.getContentName());
FileAdapter tgtFile = new FileAdapter(fullName);
if (tgtFile.exists()) {
// This is the case where the client and the server have a file
// with the very same name but different content. In this case
// we rename the destination file
fullName = createUniqueFileName(fullName);
if (Log.isLoggable(Log.INFO)) {
Log.info(TAG_LOG, "Changing target file name to avoid clashing " + fullName);
}
}
tgtFile.close();
item.setKey(fullName);
if (Log.isLoggable(Log.DEBUG)) {
Log.debug(TAG_LOG, "key set to:" + fullName);
}
// This is a new file, rename the temp file
String sourceFileName = createTempFileName(jsonSyncItem.getContentName());
renameTempFile(sourceFileName, fullName);
super.addItem(item);
return SyncSource.SUCCESS_STATUS;
} catch (IOException ioe) {
Log.error(TAG_LOG, "Cannot rename temporary file", ioe);
throw new SyncException(SyncException.CLIENT_ERROR, "Cannot rename temporary file");
}
}
protected int updateItem(SyncItem item) throws SyncException {
if (Log.isLoggable(Log.DEBUG)) {
Log.debug(TAG_LOG, "updateItem");
}
JSONSyncItem jsonSyncItem = (JSONSyncItem) item;
try {
String fullName = getFileFullName(jsonSyncItem.getContentName());
item.setKey(fullName);
if (Log.isLoggable(Log.DEBUG)) {
Log.debug(TAG_LOG, "key set to:" + fullName);
}
if (jsonSyncItem.isItemKeyUpdated()) {
// Update the tracker of the renamed item
// Must be done before renaming the file since the rename
// event will be notified to the tracker itself
getTracker()
.removeItem(new SyncItem(jsonSyncItem.getOldKey(), null, SyncItem.STATE_DELETED, null));
getTracker()
.removeItem(new SyncItem(jsonSyncItem.getKey(), null, SyncItem.STATE_NEW, null));
}
if (jsonSyncItem.isItemContentUpdated()) {
// The new content has been downloaded into a temporary file
String sourceFileName = createTempFileName(jsonSyncItem.getContentName());
renameTempFile(sourceFileName, fullName);
if (jsonSyncItem.isItemKeyUpdated()) {
// We shall remove the old file
String oldFileName = jsonSyncItem.getOldKey();
FileAdapter fa = new FileAdapter(oldFileName);
fa.delete();
}
} else if (jsonSyncItem.isItemKeyUpdated()) {
// This is just a rename
String sourceFileName = jsonSyncItem.getOldKey();
renameTempFile(sourceFileName, fullName);
}
super.updateItem(item);
return SyncSource.SUCCESS_STATUS;
} catch (IOException ioe) {
Log.error(TAG_LOG, "Cannot rename temporary file", ioe);
throw new SyncException(SyncException.CLIENT_ERROR, "Cannot rename temporary file");
}
}
/**
* Twin detection implementation
*
* @param item
* @return the twin sync item, whose key is the LUID
*/
public SyncItem findTwin(SyncItem item) {
if (item instanceof JSONSyncItem) {
JSONFileObject json = ((JSONSyncItem) item).getJSONFileObject();
String fileName = json.getName();
String fullName = getFileFullName(fileName);
// Does this existing in our directory?
if (Log.isLoggable(Log.DEBUG)) {
Log.debug(TAG_LOG, "Checking for twin for: " + fileName);
}
FileAdapter fa = null;
try {
fa = new FileAdapter(fullName);
if (fa.exists() && fa.getSize() == json.getSize()) {
if (Log.isLoggable(Log.DEBUG)) {
Log.debug(TAG_LOG, "Twin found");
}
item.setKey(fullName);
return item;
}
} catch (Throwable t) {
Log.error(TAG_LOG, "Cannot check for twins", t);
} finally {
if (fa != null) {
try {
fa.close();
} catch (IOException ioe) {
}
}
}
}
// No twin found
return null;
}