@Override
public DataSet getData() throws DataSetException {
/*
* Create a new data set instance in case no data set is available yet or configuration has
* changed
*/
boolean configurationChanged =
dataSetConfiguration != null
&& !dataSetConfiguration.getParameters().equals(getConfiguration().getParameters());
if (dataSet == null || configurationChanged) {
// close old preview set in case a new one is created
if (dataSet != null) {
dataSet.close();
dataSet = null;
}
try {
this.dataSet = createDataSet(XlsxReadMode.OPERATOR);
this.dataSetConfiguration = getConfiguration();
} catch (OperatorException e) {
throw new DataSetException(e.getMessage(), e.getCause());
}
}
return dataSet;
}
@Override
public DataSet getPreview(int maxPreviewSize) throws DataSetException {
/*
* Create a new preview data set instance in case no preview is available yet or
* configuration has changed
*/
boolean configChange =
previewConfiguration != null
&& !previewConfiguration.getParameters().equals(getConfiguration().getParameters());
if (previewDataSet == null || configChange) {
// close old preview set in case a new one is created
if (previewDataSet != null) {
previewDataSet.close();
previewDataSet = null;
}
try {
this.previewDataSet = createDataSet(XlsxReadMode.WIZARD_PREVIEW, maxPreviewSize);
this.previewConfiguration = getConfiguration();
} catch (OperatorException e) {
throw new DataSetException(e.getMessage(), e.getCause());
}
}
return previewDataSet;
}