org.apache.openjpa.kernel.exps
Class Size

java.lang.Object
  org.apache.openjpa.kernel.exps.Val
      org.apache.openjpa.kernel.exps.UnaryMathVal
          org.apache.openjpa.kernel.exps.Size

All Implemented Interfaces:

Serializable, Value

 class Size
extends UnaryMathVal

Returns the count of a collection.

Author:

Marc Prud'hommeaux

Constructor Summary

Size(Val val)

Method Summary

protected Class	getType(Class c) Return the type of this value based on the numeric type being operated on.
protected Object	operate(Object o, Class c) Return the result of this mathematical operation on the given value.

Methods inherited from class org.apache.openjpa.kernel.exps.UnaryMathVal

acceptVisit, eval, getType, setImplicitType

Methods inherited from class org.apache.openjpa.kernel.exps.Val

eval, evaluate, evaluate, getAlias, getMetaData, getName, getPath, getSelectAs, isAggregate, isVariable, isXPath, setAlias, setMetaData

Methods inherited from class java.lang.Object

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

Constructor Detail

Size

public Size(Val val)

Method Detail

getType

protected Class getType(Class c)

Description copied from class: UnaryMathVal

Return the type of this value based on the numeric type being operated on.

Specified by:

getType in class UnaryMathVal

operate

protected Object operate(Object o,
                         Class c)

Description copied from class: UnaryMathVal

Return the result of this mathematical operation on the given value.

Specified by:

operate in class UnaryMathVal