public OutputStream getContentOutputStreamAndLockDataBean(DataBean bean) throws IOException {
// only local temp beans support output, so convert to local temp bean if needed
ContentLocation tempLocalLocation = bean.getContentLocation(StorageMethod.LOCAL_TEMP);
if (tempLocalLocation == null) {
this.convertToLocalTempDataBean(bean);
tempLocalLocation = bean.getContentLocation(StorageMethod.LOCAL_TEMP);
}
// remove all other locations, as they will become obsolete when OutputStream is written to
while (bean.getContentLocations().size() > 1) {
for (ContentLocation location : bean.getContentLocations()) {
if (location != tempLocalLocation) {
bean.removeContentLocation(location);
break; // remove outside of the iterator, cannot continue
}
}
}
// change data id
bean.setId(CryptoKey.generateRandom());
bean.setChecksum(null);
bean.setSize(null);
return tempLocalLocation.getHandler().getOutputStream(tempLocalLocation);
}
public File getLocalFile(DataBean bean) throws IOException {
ContentLocation location = bean.getContentLocation(StorageMethod.LOCAL_FILE_METHODS);
// convert non local file beans to local file beans
if (location == null) {
this.convertToLocalTempDataBean(bean);
location = bean.getContentLocation(StorageMethod.LOCAL_FILE_METHODS);
}
// get the file
LocalFileContentHandler handler = (LocalFileContentHandler) location.getHandler();
return handler.getFile(location);
}
/**
* Get a local file with random access support, in practice a temp file. If random access support
* isn't really needed, please use method getLocalFile().
*
* @param bean
* @return
* @throws IOException
*/
public File getLocalRandomAccessFile(DataBean bean) throws IOException {
// Check if there is a suitable location already
ContentLocation location = getClosestRandomAccessContentLocation(bean);
if (location == null || !location.getMethod().isLocal()) {
// Closest random access location isn't local, make a local copy (temp files do support random
// access)
this.convertToLocalTempDataBean(bean);
}
// Now this is a local random access copy
location = getClosestRandomAccessContentLocation(bean);
// get the file
LocalFileContentHandler handler = (LocalFileContentHandler) location.getHandler();
return handler.getFile(location);
}
private InputStream getBaseContentStream(DataBean bean, DataNotAvailableHandling naHandling)
throws IOException {
// try local content locations first
ContentLocation location = getClosestContentLocation(bean);
if (location != null) {
// local available TODO maybe check if it really is available
return location.getHandler().getInputStream(location);
}
// try from filebroker
Exception remoteException;
try {
return Session.getSession()
.getServiceAccessor()
.getFileBrokerClient()
.getInputStream(bean.getId());
} catch (Exception e) {
remoteException = e;
}
// not available
switch (naHandling) {
case EMPTY_ON_NA:
return new ByteArrayInputStream(new byte[] {});
case INFOTEXT_ON_NA:
return new ByteArrayInputStream(DATA_NA_INFOTEXT.getBytes());
case NULL_ON_NA:
return null;
default:
String message = "data contents not available";
if (remoteException != null) {
message += ": " + remoteException.getMessage();
}
throw new RuntimeException(message, remoteException);
}
}
public Long getContentLength(ContentLocation location) throws IOException {
return location.getHandler().getContentLength(location);
}
private boolean isAccessible(ContentLocation location) {
return location.getHandler().isAccessible(location);
}