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
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.
See Also:

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private static final long
    serialVersionUID
     
    private static final NullType
    theInstance
     

    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 ExtendedTypes

    T_AVAIL_TYPE, T_BOTTOM, T_DOUBLE_EXTRA, T_EXCEPTION, T_LONG_EXTRA, T_NULL, T_TOP

  • Constructor Summary

    Constructors
    Modifier
    Constructor
    Description
    private
    NullType()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    equals(Object o)
     
    int
    hashCode()
     
    static NullType
    instance()
     

    Methods inherited from class org.apache.bcel.generic.ReferenceType

    firstCommonSuperclass, getFirstCommonSuperclass, isAssignmentCompatibleWith, isCastableTo

    Methods inherited from class org.apache.bcel.generic.Type

    getArgumentTypes, getClassName, getMethodSignature, getReturnType, getSignature, getSignature, getSize, getType, getType, getType, getTypes, normalizeForStackOrLocal, toString

    Methods inherited from class Object

    clone, finalize, getClass, notify, notifyAll, wait, wait, wait

  • Field Details

    • serialVersionUID

      private static final long serialVersionUID
      See Also:

    • theInstance

      private static final NullType theInstance

  • Constructor Details

    • NullType

      private NullType()

  • Method Details

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class org.apache.bcel.generic.Type

    • equals

      public boolean equals(Object o)
      Overrides:
      equals in class org.apache.bcel.generic.Type

    • instance

      public static NullType instance()