@Override
public int compare(RowKey key1, RowKey key2) {
CompareToBuilder builder = new CompareToBuilder();
for (String name : sortFields) {
builder.append(key1.getColumnValue(name), key2.getColumnValue(name));
}
return builder.toComparison();
}
/**
* Returns the entity key on the other side of association row represented by the given row key.
*
* <p><b>Note:</b> May only be invoked if the row key actually contains all the columns making up
* that entity key. Specifically, it may <b>not</b> be invoked if the association has index
* columns (maps, ordered collections), as the entity key columns will not be part of the row key
* in this case.
*/
private EntityKey getEntityKey(AssociationKey associationKey, RowKey rowKey) {
String[] associationKeyColumns =
associationKey.getMetadata().getAssociatedEntityKeyMetadata().getAssociationKeyColumns();
Object[] columnValues = new Object[associationKeyColumns.length];
int i = 0;
for (String associationKeyColumn : associationKeyColumns) {
columnValues[i] = rowKey.getColumnValue(associationKeyColumn);
i++;
}
EntityKeyMetadata entityKeyMetadata =
associationKey.getMetadata().getAssociatedEntityKeyMetadata().getEntityKeyMetadata();
return new EntityKey(entityKeyMetadata, columnValues);
}