net.tinyos.tinydb
Interface QueryExpr

All Known Implementing Classes:

AggExpr, SelExpr

public interface QueryExpr

Abstract interface for all kinds of expressions that can appear in a query

Method Summary

short	getField() Return the id of the field this expression applies to
short	getFieldConst() Return the constant that is used in the arithmetic expression that will be performed on the field.
short	getFieldOp() Return the arithmetic operation that is used in the arithmetic expression that will be performed to the field.
boolean	isAgg() Return true if this expression is an aggregator

Method Detail

isAgg

public boolean isAgg()

Return true if this expression is an aggregator

getField

public short getField()

Return the id of the field this expression applies to

getFieldOp

public short getFieldOp()

Return the arithmetic operation that is used in the arithmetic expression that will be performed to the field.

getFieldConst

public short getFieldConst()

Return the constant that is used in the arithmetic expression that will be performed on the field.