org.apache.openjpa.kernel.exps
Class Index

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

All Implemented Interfaces:

Serializable, Value

 class Index
extends UnaryMathVal

Returns the index of a value within a collection/map.

Author:

Catalina Wei

Constructor Summary

Index(Val val)
Constructor.

Method Summary

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

Index

public Index(Val val)

Constructor.

Method Detail

getType

public 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