/**
* An alternative constructor that allows one to specify whether or not to show columns which are
* entirely empty. If <code>omitEmptyFields</code> is true, the <code>emptyFields</code> set is
* filled with the names of the empty fields. This is an expensive operation which requires
* iteration over potentially all of the titles, so is performed here at construction.
*
* <p>Due to this processing, it is not possible to accept an iterator instead of a list, which
* would be less memory intensive.
*
* @param titles the titles to be exported
* @param ordering an ordering to impose on the fields of each title
* @param omitEmptyFields whether to omit empty field columns from the output
*/
public KbartExportFilter(
List<KbartTitle> titles,
ColumnOrdering ordering,
boolean omitEmptyFields,
boolean omitHeader,
boolean excludeNoIdTitles,
boolean showHealthRatings) {
this.titles = titles;
this.columnOrdering = ordering;
this.omitEmptyFields = omitEmptyFields;
this.omitHeaderRow = omitHeader;
this.excludeNoIdTitles = excludeNoIdTitles;
this.showHealthRatings = showHealthRatings;
// Work out the list of empty fields if necessary
this.emptyFields = omitEmptyFields ? findEmptyFields() : EnumSet.noneOf(Field.class);
// Create a list of the visible (non-omitted) fields out of the supplied ordering
this.visibleColumnOrdering =
CustomColumnOrdering.copy(columnOrdering).removeFields(emptyFields);
this.rangeFieldsIncludedInDisplay =
!CollectionUtil.isDisjoint(visibleColumnOrdering.getFields(), rangeFields);
this.idFieldsIncludedInDisplay =
!CollectionUtil.isDisjoint(visibleColumnOrdering.getFields(), idFields);
}
