public class EPTypeNull extends java.lang.Object implements EPType
EPTypeNull
represents a null-type.
EPL allows null-typed columns, such as in create schema MyEvent(emptyColumn null)
.
EPL allows null to occur in the select-clause, as exemplified in select null as item from OrderEvent
.
Your application may obtain the property type using EventType.getPropertyEPType(String)
which returns INSTANCE
when the property is of type null.
EPTypeNull
is a singleton.
Modifier and Type | Field and Description |
---|---|
static EPTypeNull |
INSTANCE
Instance.
|
Modifier and Type | Method and Description |
---|---|
java.lang.String |
getTypeName()
Returns the type name.
|
java.lang.String |
toString() |
public static final EPTypeNull INSTANCE
public java.lang.String getTypeName()
EPType
getTypeName
in interface EPType
public java.lang.String toString()
toString
in class java.lang.Object