public static UUID getId(
EntityRef connectingEntity,
ConnectedEntityRef connectedEntity,
ConnectedEntityRef... pairedConnections) {
UUID uuid = null;
try {
if (connectionsNull(pairedConnections) && connectionsNull(connectedEntity)) {
return connectingEntity.getUuid();
}
ByteArrayOutputStream byteStream =
new ByteArrayOutputStream(16 + (32 * pairedConnections.length));
byteStream.write(uuidToBytesNullOk(connectingEntity.getUuid()));
for (ConnectedEntityRef connection : pairedConnections) {
String connectionType = connection.getConnectionType();
UUID connectedEntityID = connection.getUuid();
byteStream.write(ascii(StringUtils.lowerCase(connectionType)));
byteStream.write(uuidToBytesNullOk(connectedEntityID));
}
String connectionType = connectedEntity.getConnectionType();
if (connectionType == null) {
connectionType = NULL_ENTITY_TYPE;
}
UUID connectedEntityID = connectedEntity.getUuid();
byteStream.write(ascii(StringUtils.lowerCase(connectionType)));
byteStream.write(uuidToBytesNullOk(connectedEntityID));
byte[] raw_id = byteStream.toByteArray();
// logger.info("raw connection index id: " +
// Hex.encodeHexString(raw_id));
uuid = UUID.nameUUIDFromBytes(raw_id);
// logger.info("connection index uuid: " + uuid);
} catch (IOException e) {
logger.error("Unable to create connection UUID", e);
}
return uuid;
}
public UUID getFirstPairedConnectedEntityId() {
ConnectedEntityRef pairedConnection = getFirstPairedConnection();
if (pairedConnection != null) {
return pairedConnection.getUuid();
}
return null;
}
public static boolean connectionsNull(ConnectedEntityRef... pairedConnections) {
if ((pairedConnections == null) || (pairedConnections.length == 0)) {
return true;
}
for (ConnectedEntityRef pairedConnection : pairedConnections) {
if (pairedConnection == null
|| pairedConnection.getUuid() == null
|| pairedConnection.getUuid().equals(NULL_ID)) {
return true;
}
}
return false;
}
/** @return */
public UUID getConnectedEntityId() {
return connectedEntity.getUuid();
}