com.healthmarketscience.jackcess.impl.expr

Class FunctionSupport.Func0

java.lang.Object

com.healthmarketscience.jackcess.impl.expr.FunctionSupport.BaseFunction

com.healthmarketscience.jackcess.impl.expr.FunctionSupport.Func0

All Implemented Interfaces:

Function

Enclosing class:

FunctionSupport

public abstract static class FunctionSupport.Func0
extends FunctionSupport.BaseFunction

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Func0(String name)

Method Summary

Modifier and Type	Method and Description
Value	eval(EvalContext ctx, Value... params) Evaluates this function within the given context with the given parameters.
protected abstract Value	eval0(EvalContext ctx)
boolean	isPure()

Methods inherited from class com.healthmarketscience.jackcess.impl.expr.FunctionSupport.BaseFunction

getName, invalidFunctionCall, toString, validateNumParams

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Func0

protected Func0(String name)

Method Detail

isPure

public boolean isPure()

Specified by:

isPure in interface Function

Overrides:

isPure in class FunctionSupport.BaseFunction

Returns:

true if this function is a "pure" function, false otherwise. A pure function will always return the same result for a given set of parameters and has no side effects.

eval

public final Value eval(EvalContext ctx,
                        Value... params)

Description copied from interface: Function

Evaluates this function within the given context with the given parameters.

Returns:

the result of the function evaluation

eval0

protected abstract Value eval0(EvalContext ctx)