/**
* Get a table from PV
*
* <p>Ideally, the PV holds a {@link VTable}, and the returned data is then the table's data.
*
* <p>If the PV is a scalar, a table with a single cell is returned.
*
* <p>If the PV is an array, a table with one column is returned.
*
* @param value Value of a PV
* @return List of rows, where each row contains either String or Number cells
*/
@SuppressWarnings("rawtypes")
public static List<List<Object>> getTable(final VType value) {
final List<List<Object>> data = new ArrayList<>();
if (value instanceof VTable) {
final VTable table = (VTable) value;
final int rows = table.getRowCount();
final int cols = table.getColumnCount();
// Extract 2D string matrix for data
for (int r = 0; r < rows; ++r) {
final List<Object> row = new ArrayList<>(cols);
for (int c = 0; c < cols; ++c) {
final Object col_data = table.getColumnData(c);
if (col_data instanceof List) row.add(Objects.toString(((List) col_data).get(r)));
else if (col_data instanceof ListDouble) row.add(((ListDouble) col_data).getDouble(r));
else if (col_data instanceof ListNumber) row.add(((ListNumber) col_data).getLong(r));
else row.add(Objects.toString(col_data));
}
data.add(row);
}
} else if (value instanceof VNumberArray) {
final ListNumber numbers = ((VNumberArray) value).getData();
final int num = numbers.size();
for (int i = 0; i < num; ++i) data.add(Arrays.asList(numbers.getDouble(i)));
} else if (value instanceof VNumber) data.add(Arrays.asList(((VNumber) value).getValue()));
else data.add(Arrays.asList(Objects.toString(value)));
return data;
}
/**
* Get a table cell from PV
*
* <p>PV must hold a VTable
*
* @param value Value of a PV
* @param row Row index, 0..
* @param column Column index, 0..
* @return Either String or Number for the cell's value, null if invalid row/column
*/
@SuppressWarnings("rawtypes")
public static Object getTableCell(final VType value, final int row, final int column) {
if (value instanceof VTable) {
final VTable table = (VTable) value;
if (column >= table.getColumnCount() || row >= table.getRowCount()) return null;
final Object col_data = table.getColumnData(column);
if (col_data instanceof List) return Objects.toString(((List) col_data).get(row));
else if (col_data instanceof ListDouble) return ((ListDouble) col_data).getDouble(row);
else if (col_data instanceof ListNumber) return ((ListNumber) col_data).getLong(row);
else return Objects.toString(col_data);
} else return Objects.toString(value);
}
/**
* Get labels for a {@link VEnum} value, or headers for a {@link VTable}.
*
* @param value Value of a PV
* @return Enum labels or empty array if not enum nor table
*/
public static String[] getLabels(final VType value) {
if (value instanceof VEnum) {
final List<String> labels = ((VEnum) value).getLabels();
return labels.toArray(new String[labels.size()]);
}
if (value instanceof VTable) {
final VTable table = (VTable) value;
final int num = table.getColumnCount();
final String[] headers = new String[num];
for (int i = 0; i < num; ++i) headers[i] = table.getColumnName(i);
return headers;
}
return new String[0];
}