/**
* Returns a best guess for the conversion to use for a given selected column. This will be one of
* the ones associated with this selector (i.e. one of the ones in the conversion selector or the
* sole one if there is no conversion selector).
*
* @param cinfo column description
* @return suitable column converter
*/
private ColumnConverter guessConverter(ColumnInfo cinfo) {
/* If there is only one permissible converter, return that. */
if (converter0_ != null) {
return converter0_;
}
/* Otherwise, try to get clever. This is currently done on a
* case-by-case basis rather than using an extensible framework
* because there's a small number (1) of conversions that we know
* about. If there were many, a redesign might be in order. */
String units = info_.getUnitString();
String cunits = cinfo.getUnitString();
if (units != null && cunits != null) {
units = units.toLowerCase();
cunits = cunits.toLowerCase();
int nconv = convChooser_.getSize();
if (units.equals("radian") || units.equals("radians")) {
if (cunits.startsWith("rad")) {
for (int i = 0; i < nconv; i++) {
ColumnConverter conv = (ColumnConverter) convChooser_.getElementAt(i);
if (conv.toString().toLowerCase().startsWith("rad")) {
return conv;
}
}
} else if (cunits.startsWith("deg")) {
for (int i = 0; i < nconv; i++) {
ColumnConverter conv = (ColumnConverter) convChooser_.getElementAt(i);
if (conv.toString().toLowerCase().startsWith("deg")) {
return conv;
}
}
} else if (cunits.startsWith("hour") || cunits.equals("hr") || cunits.equals("hrs")) {
for (int i = 0; i < nconv; i++) {
ColumnConverter conv = (ColumnConverter) convChooser_.getElementAt(i);
if (conv.toString().toLowerCase().startsWith("hour")) {
return conv;
}
}
} else if (cunits.startsWith("arcmin")) {
for (int i = 0; i < nconv; i++) {
ColumnConverter conv = (ColumnConverter) convChooser_.getElementAt(i);
if (conv.toString().toLowerCase().startsWith("arcmin")) {
return conv;
}
}
} else if (cunits.startsWith("arcsec")) {
for (int i = 0; i < nconv; i++) {
ColumnConverter conv = (ColumnConverter) convChooser_.getElementAt(i);
if (conv.toString().toLowerCase().startsWith("arcsec")) {
return conv;
}
}
}
}
}
/* Return null if we haven't found a match yet. */
return null;
}
/**
* Constructs a new model for a given table and value type.
*
* @param tcModel table model
* @param info description of the kind of column which is required
*/
public ColumnSelectorModel(TopcatModel tcModel, ValueInfo info) {
info_ = info;
selectionListener_ = new SelectionListener();
/* Get a suitable model for selection of the unit converter, if
* appropriate. */
String units = info.getUnitString();
ColumnConverter[] converters = ColumnConverter.getConverters(info);
if (converters.length > 1) {
converter0_ = null;
convChooser_ = new DefaultComboBoxModel(converters);
convChooser_.addListDataListener(selectionListener_);
} else {
convChooser_ = null;
converter0_ = converters[0];
}
setTable(tcModel);
}