org.cumulus4j.store.query.method
Class MapSizeEvaluator

java.lang.Object
  org.cumulus4j.store.query.method.AbstractMethodEvaluator
      org.cumulus4j.store.query.method.MapSizeEvaluator

All Implemented Interfaces:

MethodEvaluator

public class MapSizeEvaluator
extends AbstractMethodEvaluator

Evaluator for "Map.size() {oper} {comparisonArg}".

Field Summary

Fields inherited from class org.cumulus4j.store.query.method.AbstractMethodEvaluator

compareToArgument

Constructor Summary

MapSizeEvaluator()

Method Summary

Set<Long>	evaluate(QueryEvaluator queryEval, InvokeExpressionEvaluator invokeExprEval, Expression invokedExpr, ResultDescriptor resultDesc) Method to evaluate the provided method invocation invoking on a PrimaryExpression.
boolean	requiresComparisonArgument() Whether this evaluator requires a comparison argument to perform its evaluation.

Methods inherited from class org.cumulus4j.store.query.method.AbstractMethodEvaluator

setCompareToArgument

Methods inherited from class java.lang.Object

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

Constructor Detail

MapSizeEvaluator

public MapSizeEvaluator()

Method Detail

requiresComparisonArgument

public boolean requiresComparisonArgument()

Description copied from interface: MethodEvaluator

Whether this evaluator requires a comparison argument to perform its evaluation.

Specified by:

requiresComparisonArgument in interface MethodEvaluator

Overrides:

requiresComparisonArgument in class AbstractMethodEvaluator

Returns:

True if needing the comparison argument

evaluate

public Set<Long> evaluate(QueryEvaluator queryEval,
                          InvokeExpressionEvaluator invokeExprEval,
                          Expression invokedExpr,
                          ResultDescriptor resultDesc)

Description copied from interface: MethodEvaluator

Method to evaluate the provided method invocation invoking on a PrimaryExpression.

Parameters:

queryEval - Query evaluator

invokeExprEval - Evaluator for the InvokeExpression that this is processing

invokedExpr - Expression on which we are invoking the method

resultDesc - Result descriptor

Returns:

those dataEntryIDs that match the query criteria for the specified resultSymbol or null, if the symbol is not supported