org.datanucleus.query.evaluator.memory
Interface InvocationEvaluator

All Known Implementing Classes:

AbsFunctionEvaluator, CollectionContainsMethodEvaluator, ConcatFunctionEvaluator, ContainerIsEmptyMethodEvaluator, ContainerSizeMethodEvaluator, CurrentDateFunctionEvaluator, CurrentTimeFunctionEvaluator, CurrentTimestampFunctionEvaluator, DateGetDayMethodEvaluator, DateGetHoursMethodEvaluator, DateGetMinutesMethodEvaluator, DateGetMonthMethodEvaluator, DateGetSecondsMethodEvaluator, DateGetTimeMethodEvaluator, DateGetYearMethodEvaluator, JDOHelperGetObjectIdFunctionEvaluator, JDOHelperGetVersionFunctionEvaluator, LengthFunctionEvaluator, LocateFunctionEvaluator, LowerFunctionEvaluator, MapContainsKeyMethodEvaluator, MapContainsValueMethodEvaluator, MapGetMethodEvaluator, ModFunctionEvaluator, SizeFunctionEvaluator, SqrtFunctionEvaluator, StringEndsWithMethodEvaluator, StringIndexOfMethodEvaluator, StringLengthMethodEvaluator, StringMatchesMethodEvaluator, StringStartsWithMethodEvaluator, StringSubstringMethodEvaluator, StringToLowerCaseMethodEvaluator, StringToUpperCaseMethodEvaluator, StringTrimMethodEvaluator, SubstringFunctionEvaluator, TrimFunctionEvaluator, UpperFunctionEvaluator

public interface InvocationEvaluator

Interface representing an evaluator for an invocation of a method/function.

Method Summary

java.lang.Object	evaluate(InvokeExpression expr, java.lang.Object invokedValue, InMemoryExpressionEvaluator eval) Method to evaluate the InvokeExpression, as part of the overall evaluation defined by the InMemoryExpressionEvaluator.
boolean	supportsType(java.lang.Class cls) Accessor for whether this evaluator supports invocation of this method on the specified type.

Method Detail

evaluate

java.lang.Object evaluate(InvokeExpression expr,
                          java.lang.Object invokedValue,
                          InMemoryExpressionEvaluator eval)

Method to evaluate the InvokeExpression, as part of the overall evaluation defined by the InMemoryExpressionEvaluator.

Parameters:

expr - The expression for invocation

invokedValue - Value on which we are invoking

eval - The overall evaluator for in-memory

Returns:

The result

supportsType

boolean supportsType(java.lang.Class cls)

Accessor for whether this evaluator supports invocation of this method on the specified type.

Parameters:

cls - Type to check

Returns:

Whether it is supported.