Class AggregateFunctionCallExp

java.lang.Object

org.apache.cayenne.exp.Expression

org.apache.cayenne.exp.ValueExp

org.apache.cayenne.exp.FunctionCallExp

org.apache.cayenne.exp.AggregateFunctionCallExp

All Implemented Interfaces:

XMLSerializable

Direct Known Subclasses:

AvgExp, CountExp, CustomAggregateExp, DistinctExp, MaxExp, MinExp, SumExp

public abstract sealed class AggregateFunctionCallExp
extends FunctionCallExp
permits AvgExp, CountExp, CustomAggregateExp, DistinctExp, MaxExp, MinExp, SumExp

Base class for all aggregation functions expressions It's more like marker interface for now.

Since:

5.0

Field Summary

Fields inherited from class Expression

operands, PRUNED_NODE

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AggregateFunctionCallExp(Object... operands)

Method Summary

Modifier and Type	Method	Description
protected Object	evaluateCollection(Collection<?> values)
protected Object	evaluateNode(Object o)	Evaluates itself with object, pushing result on the stack.
protected Object	evaluateSubNode(Object o, Object[] evaluatedChildren)
protected int	getRequiredChildrenCount()

Methods inherited from class FunctionCallExp

appendAsString, appendFunctionNameAsString, equals, getExpressionOperator, getFunctionName, hashCode, nameToCamelCase, needParenthesis, parenthesizeAsOperand

Methods inherited from class Expression

andExp, andExp, appendOperandAsString, deepCopy, encodeAsXML, evaluate, evaluateOperand, exists, expName, filter, filterObjects, first, flattenTree, getOperand, getOperandCount, getPathAliases, isValidParent, match, notExists, notExp, orExp, orExp, params, params, paramsArray, pruneNodeForPrunedChild, setOperand, setOperands, shallowCopy, toString, transform, transformExpression, traverse, traverse

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

AggregateFunctionCallExp

protected AggregateFunctionCallExp(Object... operands)

Method Details

getRequiredChildrenCount

protected int getRequiredChildrenCount()

Specified by:

getRequiredChildrenCount in class ValueExp

evaluateNode

protected Object evaluateNode(Object o)
                       throws Exception

Description copied from class: Expression

Evaluates itself with object, pushing result on the stack.

Overrides:

evaluateNode in class ValueExp

Throws:

Exception

evaluateCollection

protected Object evaluateCollection(Collection<?> values)

evaluateSubNode

protected Object evaluateSubNode(Object o,
 Object[] evaluatedChildren)
                          throws Exception

Specified by:

evaluateSubNode in class ValueExp

Throws:

Exception