com.healthmarketscience.jackcess.expr

Interface EvalConfig

All Known Implementing Classes:

DBEvalContext

public interface EvalConfig

The EvalConfig allows for customization of the expression evaluation context for a given Database instance.

Author:

James Ahlborn

See Also:

expression package docs

Method Summary

Modifier and Type	Method and Description
Bindings	getBindings()
FunctionLookup	getFunctionLookup()
NumericConfig	getNumericConfig()
TemporalConfig	getTemporalConfig()
void	setBindings(Bindings bindings) Allows for passing custom information into expression evaluation.
void	setFunctionLookup(FunctionLookup lookup) Sets the Function provider to use during expression evaluation.
void	setNumericConfig(NumericConfig numeric) Sets the NumericConfig for use when evaluating expressions.
void	setTemporalConfig(TemporalConfig temporal) Sets the TemporalConfig for use when evaluating expressions.

Method Detail

getTemporalConfig

TemporalConfig getTemporalConfig()

Returns:

the currently configured TemporalConfig

setTemporalConfig

void setTemporalConfig(TemporalConfig temporal)

Sets the TemporalConfig for use when evaluating expressions. The default date/time formatting is US based, so this may need to be modified when interacting with Database instances from other locales.

getNumericConfig

NumericConfig getNumericConfig()

Returns:

the currently configured NumericConfig

setNumericConfig

void setNumericConfig(NumericConfig numeric)

Sets the NumericConfig for use when evaluating expressions. The default date/time formatting is US based, so this may need to be modified when interacting with Database instances from other locales.

getFunctionLookup

FunctionLookup getFunctionLookup()

Returns:

the currently configured FunctionLookup

setFunctionLookup

void setFunctionLookup(FunctionLookup lookup)

Sets the Function provider to use during expression evaluation. The Functions supported by the default FunctionLookup are documented in com.healthmarketscience.jackcess.expr. Custom Functions can be implemented and provided to the expression evaluation engine by installing a custom FunctionLookup instance (which would presumably wrap and delegate to the default FunctionLookup instance for any default implementations).

getBindings

Bindings getBindings()

Returns:

the currently configured Bindings

setBindings

void setBindings(Bindings bindings)

Allows for passing custom information into expression evaluation. Currently, none of the default implementations make use of the Bindings. However, in the future, customization parameters could potentially be supported via custom Bindings. Additionally, custom Function instances could be passed external information via custom Bindings.