com.sciapp.treetable.db
Interface DatabaseAggregator

All Superinterfaces:

Aggregator

All Known Implementing Classes:

AbstractDatabaseAggregator, DefaultDatabaseAggregator

public interface DatabaseAggregator
extends Aggregator

DatabaseAggregator includes methods that allow the evaluation of the aggregate rows of a TreeTableModel in batches.

Method Summary

Object	getAggregateObject(Object aggregateObject, int column) Returns the Object found at column of aggregateObject passed as a parameter.
List	getAggregateValues(AggregateRow parent, int from, int to) Calculates and returns the aggregate values of the children of parent in the range from - to.
List	prepareValues(AggregateRow parent, int from, int to) This method retrieves the aggregate values for the children of parent in the range from - to, and assigns them on the treeModel.

Methods inherited from interface com.sciapp.treetable.Aggregator

getAggregateValue, prepareValue

Method Detail

getAggregateObject

Object getAggregateObject(Object aggregateObject,
                          int column)

Returns the Object found at column of aggregateObject passed as a parameter.

Parameters:

aggregateObject - the aggregate object as it was received from the fetch database call

column - the column index

Returns:

an appropriate value for the object at column

getAggregateValues

List getAggregateValues(AggregateRow parent,
                        int from,
                        int to)

Calculates and returns the aggregate values of the children of parent in the range from - to.

Parameters:

parent - the parent node

from - the index of the first child

to - the index of the last child

Returns:

the aggregate values as a List

prepareValues

List prepareValues(AggregateRow parent,
                   int from,
                   int to)

This method retrieves the aggregate values for the children of parent in the range from - to, and assigns them on the treeModel.

Parameters:

parent - the parent node

from - the index of the first child

to - the index of the last child