Package gnu.kawa.reflect

Class SingletonType

java.lang.Object
gnu.bytecode.Type
gnu.bytecode.ObjectType
gnu.kawa.reflect.SingletonType
All Implemented Interfaces:
Externalizable, Serializable, Type
public class SingletonType extends ObjectType implements Externalizable
See Also:

  • Constructor Details

    • SingletonType

      public SingletonType(String name)

  • Method Details

    • getInstance

      public static final SingletonType getInstance()

    • valueOf

      public static final SingletonType valueOf()

    • getReflectClass

      public Class getReflectClass()
      Description copied from class: ObjectType
      Get the java.lang.Class object for the representation type.
      Overrides:
      getReflectClass in class ObjectType

    • getImplementationType

      public Type getImplementationType()
      Description copied from class: Type
      Return Java-level implementation type. The type used to implement types not natively understood by the JVM or the Java language. Usually, the identity function. However, a language might handle union types or template types or type expressions calculated at run time. In that case return the type used at the Java level, and known at compile time.
      Overrides:
      getImplementationType in class Type

    • compare

      public int compare(Type other)
      Description copied from class: Type
      Return a numeric code showing "subtype" relationship: 1: if other is a pure subtype of this; 0: if has the same values; -1: if this is a pure subtype of other; -2: if they have values in common but neither is a subtype of the other; -3: if the types have no values in common. "Same values" is rather loose; by "A is a subtype of B" we mean that all instance of A can be "widened" to B. More formally, A.compare(B) returns: 1: all B values can be converted to A without a coercion failure (i.e. a ClassCastException or overflow or major loss of information), but not vice versa. 0: all A values can be converted to B without a coercion failure and vice versa; -1: all A values can be converted to B without a coercion failure but not vice versa; -2: there are (potentially) some A values that can be converted to B, and some B values can be converted to A; -3: there are no A values that can be converted to B, and neither are there any B values that can be converted to A.
      Overrides:
      compare in class ObjectType

    • coerceToSingleton

      public static Object coerceToSingleton(Object obj)

    • coerceFromObject

      public Object coerceFromObject(Object obj)
      Description copied from class: Type
      Convert an object to a value of this Type. The result is actually of the implementation type, boxed as appropriate, so it is suitable for standard reflective operations, like the arguments to Field#set or Method#invoke. Throw a ClassCastException when this is not possible.
      Overrides:
      coerceFromObject in class ObjectType

    • emitCoerceFromObject

      public void emitCoerceFromObject(CodeAttr code)
      Description copied from class: ObjectType
      Compile (in given method) cast from Object to this Type.
      Overrides:
      emitCoerceFromObject in class ObjectType

    • isInstance

      public boolean isInstance(Object obj)
      Overrides:
      isInstance in class ObjectType

    • writeExternal

      public void writeExternal(ObjectOutput out) throws IOException
      Specified by:
      writeExternal in interface Externalizable
      Throws:
      IOException

    • readExternal

      public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
      Specified by:
      readExternal in interface Externalizable
      Throws:
      IOException
      ClassNotFoundException

    • readResolve

      public Object readResolve() throws ObjectStreamException
      Throws:
      ObjectStreamException