Package gnu.kawa.reflect
Class SingletonType
- java.lang.Object
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- gnu.bytecode.Type
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- gnu.bytecode.ObjectType
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- gnu.kawa.reflect.SingletonType
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- All Implemented Interfaces:
Externalizable
,Serializable
,Type
public class SingletonType extends ObjectType implements Externalizable
- See Also:
- Serialized Form
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Nested Class Summary
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Nested classes/interfaces inherited from class gnu.bytecode.Type
Type.NeverReturns
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Field Summary
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Fields inherited from class gnu.bytecode.ObjectType
flags
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Fields inherited from class gnu.bytecode.Type
boolean_ctype, boolean_type, booleanType, booleanValue_method, byte_type, byteType, char_type, charType, clone_method, double_type, doubleType, doubleValue_method, errorType, float_type, floatType, floatValue_method, int_type, intType, intValue_method, java_lang_Class_type, javalangannotationAnnotationType, javalangBooleanType, javalangCharacterType, javalangClassType, javalanginvokeMethodHandleType, javalangNumberType, javalangObjectType, javalangStringType, javalangThrowableType, long_type, longType, longValue_method, neverReturnsType, nullType, number_type, objectType, pointer_type, reflectClass, short_type, shortType, string_type, throwable_type, toString_method, tostring_type, toStringType, typeArray0, void_type, voidType
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Constructor Summary
Constructors Constructor Description SingletonType(String name)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description Object
coerceFromObject(Object obj)
Convert an object to a value of this Type.static Object
coerceToSingleton(Object obj)
int
compare(Type other)
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.void
emitCoerceFromObject(CodeAttr code)
Compile (in given method) cast from Object to this Type.Type
getImplementationType()
Return Java-level implementation type.static SingletonType
getInstance()
Class
getReflectClass()
Get the java.lang.Class object for the representation type.boolean
isInstance(Object obj)
void
readExternal(ObjectInput in)
Object
readResolve()
static SingletonType
valueOf()
void
writeExternal(ObjectOutput out)
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Methods inherited from class gnu.bytecode.ObjectType
getContextClass, getContextClassLoader, getField, getInterfaces, getInternalName, getMethod, getMethods, getMethods, getSuperclass, isExisting, setExisting
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Methods inherited from class gnu.bytecode.Type
coerceToObject, emitCoerceToObject, emitConvertFromPrimitive, emitIsInstance, getGenericSignature, getMaybeGenericSignature, getName, getRawType, getRealType, getSignature, getSize, getSizeInWords, getType, hashCode, isCompatibleWithValue, isCompatibleWithValue, isInterface, isMoreSpecific, isSame, isSubtype, isValidJavaTypeName, isVoid, lookupType, lowestCommonSharedType, lowestCommonSuperType, make, make, printSignature, promote, promoteIfUnsigned, registerTypeForClass, setGenericSignature, setName, setReflectClass, setSignature, signatureLength, signatureLength, signatureToName, signatureToPrimitive, signatureToType, signatureToType, swappedCompareResult, toString
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface java.lang.reflect.Type
getTypeName
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Constructor Detail
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SingletonType
public SingletonType(String name)
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Method Detail
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getInstance
public static final SingletonType getInstance()
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valueOf
public static final SingletonType valueOf()
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getReflectClass
public Class getReflectClass()
Description copied from class:ObjectType
Get the java.lang.Class object for the representation type.- Overrides:
getReflectClass
in classObjectType
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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 classType
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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 classObjectType
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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 classObjectType
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emitCoerceFromObject
public void emitCoerceFromObject(CodeAttr code)
Description copied from class:ObjectType
Compile (in given method) cast from Object to this Type.- Overrides:
emitCoerceFromObject
in classObjectType
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isInstance
public boolean isInstance(Object obj)
- Overrides:
isInstance
in classObjectType
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writeExternal
public void writeExternal(ObjectOutput out) throws IOException
- Specified by:
writeExternal
in interfaceExternalizable
- Throws:
IOException
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readExternal
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
- Specified by:
readExternal
in interfaceExternalizable
- Throws:
IOException
ClassNotFoundException
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readResolve
public Object readResolve() throws ObjectStreamException
- Throws:
ObjectStreamException
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