org.apache.openjpa.kernel.exps
Class Null
java.lang.Object
org.apache.openjpa.kernel.exps.Val
org.apache.openjpa.kernel.exps.Null
- All Implemented Interfaces:
- Serializable, Value
class Null
- extends Val
Represents the null constant.
- Author:
- Abe White
|
Constructor Summary |
Null()
|
| Methods inherited from class org.apache.openjpa.kernel.exps.Val |
acceptVisit, 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 |
Null
Null()
getType
public Class getType()
- Description copied from interface:
Value
- Return the expected type for this value, or
Object if
the type is unknown.
setImplicitType
public void setImplicitType(Class type)
- Description copied from interface:
Value
- Set the implicit type of the value, based on how it is used in the
filter. This method is only called on values who return
Object from Value.getType().
eval
protected Object eval(Object candidate,
Object orig,
StoreContext ctx,
Object[] params)
- Description copied from class:
Val
- Return this value for the given candidate.
- Specified by:
eval in class Val
Copyright © 2006-2013 Apache Software Foundation. All Rights Reserved.