@Override
public void emitTuples() {
try {
Scan scan = nextScan();
if (scan == null) return;
ResultScanner resultScanner = store.getTable().getScanner(scan);
while (true) {
Result result = resultScanner.next();
if (result == null) break;
String readRow = Bytes.toString(result.getRow());
if (readRow.equals(lastReadRow)) continue;
Object instance = pojoType.newInstance();
rowSetter.set(instance, readRow);
List<Cell> cells = result.listCells();
for (Cell cell : cells) {
String columnName = Bytes.toString(CellUtil.cloneQualifier(cell));
byte[] value = CellUtil.cloneValue(cell);
fieldValueGenerator.setColumnValue(instance, columnName, value, valueConverter);
}
outputPort.emit(instance);
lastReadRow = readRow;
}
} catch (Exception e) {
throw new RuntimeException(e.getMessage());
}
}
@Override
public void teardown() {
try {
store.disconnect();
} catch (IOException ex) {
throw new RuntimeException(ex);
}
}
@Override
public void setup(OperatorContext context) {
try {
store.connect();
pojoType = Class.forName(pojoTypeName);
pojoType.newInstance(); // try create new instance to verify the class.
rowSetter = PojoUtils.createSetter(pojoType, tableInfo.getRowOrIdExpression(), String.class);
fieldValueGenerator =
FieldValueGenerator.getFieldValueGenerator(pojoType, tableInfo.getFieldsInfo());
valueConverter = new BytesValueConverter();
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
