/**
* Creates a new IncrementalFaultList using a given DataContext and query.
*
* @param dataContext DataContext used by IncrementalFaultList to fill itself with objects.
* @param query Main query used to retrieve data. Must have "pageSize" property set to a value
* greater than zero.
* @param maxFetchSize maximum number of fetches in one query
*/
public IncrementalFaultList(DataContext dataContext, Query query, int maxFetchSize) {
QueryMetadata metadata = query.getMetaData(dataContext.getEntityResolver());
if (metadata.getPageSize() <= 0) {
throw new CayenneRuntimeException(
"Not a paginated query; page size: " + metadata.getPageSize());
}
this.dataContext = dataContext;
this.pageSize = metadata.getPageSize();
this.rootEntity = metadata.getObjEntity();
if (rootEntity == null) {
throw new CayenneRuntimeException(
"Pagination is not supported for queries not rooted in an ObjEntity");
}
// create an internal query, it is a partial replica of
// the original query and will serve as a value holder for
// various parameters
this.internalQuery = new SelectQuery<Object>(rootEntity);
this.internalQuery.setFetchingDataRows(metadata.isFetchingDataRows());
this.internalQuery.setPrefetchTree(metadata.getPrefetchTree());
this.helper = createHelper(metadata);
this.idWidth = metadata.getDbEntity().getPrimaryKeys().size();
List<Object> elementsUnsynced = new ArrayList<>();
fillIn(query, elementsUnsynced);
this.elements = Collections.synchronizedList(elementsUnsynced);
this.maxFetchSize = maxFetchSize;
}
