com.mckoi.database
Interface GroupResolver

public interface GroupResolver

Similar to VariableResolver, this method is used by grouping Functions to find information about the current group being evaluated (used for evaluating aggregate functions).

Author:

Tobias Downer

Method Summary

VariableResolver	getVariableResolver(int set_index) Returns a VariableResolver that can be used to resolve variable in the get set of the group.
int	groupID() A number that uniquely identifies this group from all the others in the set of groups.
TObject	resolve(Variable variable, int set_index) Returns the value of a variable of a group.
int	size() The total number of set items in this group.

Method Detail

groupID

int groupID()

A number that uniquely identifies this group from all the others in the set of groups.

size

int size()

The total number of set items in this group.

resolve

TObject resolve(Variable variable,
                int set_index)

Returns the value of a variable of a group. The set index signifies the set item of the group. For example, if the group contains 10 items, then set_index may be between 0 and 9. Return types must be either a String, BigDecimal or Boolean.

getVariableResolver

VariableResolver getVariableResolver(int set_index)

Returns a VariableResolver that can be used to resolve variable in the get set of the group. The object returned is undefined after the next call to this method.