@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; }