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java.lang.Objectorg.apache.openjpa.kernel.exps.Val
org.apache.openjpa.kernel.exps.UnaryMathVal
abstract class UnaryMathVal
Value produced by a mathematical operation on one value.
| Constructor Summary | |
|---|---|
| UnaryMathVal(Val val)Constructor. | |
| Method Summary | |
|---|---|
|  void | acceptVisit(ExpressionVisitor visitor)Accept a visit from a tree visitor. | 
| protected  Object | eval(Object candidate,
     Object orig,
     StoreContext ctx,
     Object[] params)Return this value for the given candidate. | 
|  Class | getType()Return the expected type for this value, or Objectif
 the type is unknown. | 
| protected abstract  Class | getType(Class c)Return the type of this value based on the numeric type being operated on. | 
| protected abstract  Object | operate(Object o,
        Class c)Return the result of this mathematical operation on the given value. | 
|  void | setImplicitType(Class type)Set the implicit type of the value, based on how it is used in the filter. | 
| 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 | 
|---|
public UnaryMathVal(Val val)
| Method Detail | 
|---|
public Class getType()
ValueObject if
 the type is unknown.
public void setImplicitType(Class type)
ValueObject from Value.getType().
protected Object eval(Object candidate,
                      Object orig,
                      StoreContext ctx,
                      Object[] params)
Val
eval in class Valprotected abstract Class getType(Class c)
protected abstract Object operate(Object o,
                                  Class c)
public void acceptVisit(ExpressionVisitor visitor)
Value
acceptVisit in interface ValueacceptVisit in class Val| 
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