Package edu.umd.cs.findbugs.ba.type
Class NullType
- java.lang.Object
-
- org.apache.bcel.generic.Type
-
- org.apache.bcel.generic.ReferenceType
-
- edu.umd.cs.findbugs.ba.type.NullType
-
- All Implemented Interfaces:
ExtendedTypes
,java.io.Serializable
public class NullType extends org.apache.bcel.generic.ReferenceType implements ExtendedTypes
Special type representing the null value. This is a type which is higher in the lattice than any object type, but lower than the overall Top type. It represents the type of the null value, which may logically be merged with any object type without loss of information.- Author:
- David Hovemeyer
- See Also:
TypeAnalysis
,TypeFrame
,TypeMerger
, Serialized Form
-
-
Field Summary
-
Fields inherited from class org.apache.bcel.generic.Type
BOOLEAN, BYTE, CHAR, CLASS, DOUBLE, FLOAT, INT, LONG, NO_ARGS, NULL, OBJECT, SHORT, signature, STRING, STRINGBUFFER, THROWABLE, type, UNKNOWN, VOID
-
Fields inherited from interface edu.umd.cs.findbugs.ba.type.ExtendedTypes
T_AVAIL_TYPE, T_BOTTOM, T_DOUBLE_EXTRA, T_EXCEPTION, T_LONG_EXTRA, T_NULL, T_TOP
-
-
Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
equals(java.lang.Object o)
int
hashCode()
static NullType
instance()
-
Methods inherited from class org.apache.bcel.generic.ReferenceType
firstCommonSuperclass, getFirstCommonSuperclass, isAssignmentCompatibleWith, isCastableTo
-
-
-
-
Method Detail
-
hashCode
public int hashCode()
- Overrides:
hashCode
in classorg.apache.bcel.generic.Type
-
equals
public boolean equals(java.lang.Object o)
- Overrides:
equals
in classorg.apache.bcel.generic.Type
-
instance
public static NullType instance()
-
-