@Override
public Sample read() throws CommonException, SampleModelSizeException {
Sample result = null;
this.checkSize();
try {
result = reader.read();
} catch (CMException e) {
throw new CommonException(e.getMessage());
} catch (DataTypeUnsupportedException de) {
throw new CommonException(de.getMessage());
}
if (result != null) {
boolean added;
if (structDetail != null) {
added = this.addSample(result, structDetail);
} else {
added = this.addSample(result);
}
if (added && (result != null)) {
this.notifyListeners("data_read");
}
} else {
this.notifyListeners("no_data_available");
}
return result;
}
protected Topic getTopic() throws CommonException {
Topic result = null;
Entity[] entities;
Entity tmp = null;
Reader r = reader;
boolean found = false;
if (reader instanceof Query) {
try {
entities = reader.getDependantEntities(EntityFilter.READER);
} catch (CMException e) {
throw new CommonException(e.getMessage());
}
if (entities.length == 0) {
throw new CommonException("Query reader has no source.");
}
r = (Reader) entities[0];
for (int i = 1; i < entities.length; i++) {
entities[i].free();
}
}
try {
entities = r.getOwnedEntities(EntityFilter.ENTITY);
if (reader instanceof Query) {
r.free();
}
for (int i = 0; i < entities.length && !found; i++) {
tmp = entities[i];
if (tmp instanceof Topic) {
found = true;
}
}
for (int i = 0; i < entities.length; i++) {
if (entities[i] != tmp) {
entities[i].free();
}
}
if (tmp != null) {
result = (Topic) tmp;
} else {
throw new CommonException("Topic could not be retrieved.");
}
} catch (CMException e) {
throw new CommonException(e.getMessage());
}
return result;
}
public Sample snapshotTake(Snapshot snapshot)
throws CommunicationException, DataTypeUnsupportedException {
Sample s = null;
this.checkConnection();
try {
String xmlSnapshot = snapshotSerializer.serializeSnapshot(snapshot);
String xmlSample = this.jniSnapshotTake(xmlSnapshot);
this.checkConnection();
s = untypedSampleDeserializer.deserializeSample(xmlSample, snapshot.getUserDataType());
} catch (TransformationException e) {
throw new CommunicationException("Could not take from snapshot.");
} catch (CMException ce) {
throw new CommunicationException(ce.getMessage());
}
return s;
}
public Sample readerTake(Reader reader)
throws CommunicationException, DataTypeUnsupportedException {
Sample result = null;
this.checkConnection();
try {
String xmlEntity = entitySerializer.serializeEntity(reader);
String xmlSample = this.jniReaderTake(xmlEntity);
this.checkConnection();
result = untypedSampleDeserializer.deserializeSample(xmlSample, reader.getDataType());
} catch (CMException e) {
throw new CommunicationException(e.getMessage());
} catch (TransformationException e) {
throw new CommunicationException("Could not take sample.");
}
return result;
}
public ReaderSampleModel(Reader _reader, String struct) throws CommonException {
super();
structDetail = struct;
if (_reader == null) {
throw new CommonException("Supplied reader == null.");
}
reader = _reader;
try {
userDataModel = new UserDataTableModel(reader.getDataType(), struct);
singleUserDataModel = new UserDataSingleTableModel(reader.getDataType(), false, struct);
} catch (CMException e) {
throw new CommonException(e.getMessage());
} catch (DataTypeUnsupportedException de) {
throw new CommonException(de.getMessage());
}
}
/**
* Constructs the model for the supplied Reader.
*
* @param _reader The Reader where data is read/taken from.
* @throws CMException Thrown when the reader is no longer available or the data type of its
* contents cannot be found.
*/
public ReaderSampleModel(Reader _reader) throws CommonException {
super();
if (_reader == null) {
throw new CommonException("Supplied reader == null.");
}
reader = _reader;
try {
userDataModel = new UserDataTableModel(reader.getDataType());
singleUserDataModel = new UserDataSingleTableModel(reader.getDataType(), false);
this.initiateToBeWrittenUserData(new UserData(reader.getDataType()));
} catch (CMException e) {
throw new CommonException(e.getMessage());
} catch (DataTypeUnsupportedException de) {
throw new CommonException(de.getMessage());
}
}
public Sample readerReadNext(Reader reader, GID instanceGID)
throws CommunicationException, DataTypeUnsupportedException {
Sample result = null;
this.checkConnection();
try {
String xmlEntity = entitySerializer.serializeEntity(reader);
String xmlSample =
this.jniReaderReadNext(
xmlEntity,
Long.toString(instanceGID.getLocalId()),
Long.toString(instanceGID.getSystemId()));
this.checkConnection();
result = untypedSampleDeserializer.deserializeSample(xmlSample, reader.getDataType());
} catch (CMException e) {
throw new CommunicationException(e.getMessage());
} catch (TransformationException e) {
throw new CommunicationException("Could not read next sample.");
}
return result;
}
@Override
public synchronized int export(File file) throws CommonException {
Topic top;
TopicQoS qos;
QoSSerializer ser;
OutputStreamWriter fw = null;
String xmlQos;
Sample sample;
SampleSerializer sampleSer;
int i = 0;
if (!file.exists()) {
try {
file.createNewFile();
} catch (IOException e1) {
throw new CommonException("Cannot create file.");
}
}
if ((!file.canRead()) || !(file.canWrite())) {
throw new CommonException("Cannot open file (insufficient rights).");
}
try {
ser = DataTransformerFactory.getQoSSerializer(DataTransformerFactory.XML);
sampleSer = DataTransformerFactory.getSampleSerializer(DataTransformerFactory.XML);
fw = new OutputStreamWriter(new FileOutputStream(file, false), "UTF-8");
top = this.getTopic();
qos = (TopicQoS) top.getQoS();
xmlQos = ser.serializeQoS(qos);
fw.write("<splice_data><partitions>");
String parts = this.getPartitions(reader);
if (parts != null) {
fw.write(parts);
}
fw.write("</partitions><topic><name>");
fw.write(top.getName());
fw.write("</name><typeName>");
fw.write(top.getTypeName());
fw.write("</typeName><keyList>");
if (top.getKeyList() != null) {
fw.write(top.getKeyList());
}
fw.write("</keyList><qos>");
fw.write(xmlQos);
fw.write("</qos><metadata>");
fw.write(this.userDataModel.getUserDataType().toXML());
fw.write("</metadata></topic><data>");
do {
sample = userDataModel.getDataAt(i);
if (sample != null) {
fw.write(sampleSer.serializeSample(sample));
}
i++;
} while (sample != null);
fw.write("</data></splice_data>");
fw.flush();
fw.close();
} catch (FileNotFoundException e) {
throw new CommonException(e.getMessage());
} catch (IOException ie) {
throw new CommonException(ie.getMessage());
} catch (CMException ce) {
throw new CommonException(ce.getMessage());
} catch (TransformationException te) {
throw new CommonException(te.getMessage());
} finally {
if (fw != null) {
try {
fw.close();
} catch (IOException ie) {
throw new CommonException(ie.getMessage());
}
}
}
return i - 1;
}
