gnu.bytecode
Class ObjectType
Semi-abstract class object reference types.
Extended by ClassType and ArrayType.
booleanValue_method , boolean_ctype , boolean_type , byte_type , char_type , doubleValue_method , double_type , floatValue_method , float_type , intValue_method , int_type , java_lang_Class_type , longValue_method , long_type , neverReturnsType , nullType , number_type , pointer_type , reflectClass , short_type , string_type , throwable_type , toString_method , tostring_type , typeArray0 , void_type |
Object | coerceFromObject(Object obj) - Convert an object to a value of this Type.
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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.
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void | emitCoerceFromObject(CodeAttr code) - Compile (in given method) cast from Object to this Type.
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Type | getImplementationType() - The type used to implement types not natively understood by the JVM.
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String | getInternalName() - Returns class name if a class type, signature if an array type.
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Class | getReflectClass() - Get the java.lang.Class object for the representation type.
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boolean | isExisting()
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Type | promote()
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void | setExisting(boolean existing)
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coerceFromObject , coerceToObject , compare , emitCoerceFromObject , emitCoerceToObject , emitIsInstance , getImplementationType , getName , getReflectClass , getSignature , getSize , getType , hashCode , isInstance , isMoreSpecific , isSubtype , isValidJavaTypeName , isVoid , lookupType , lowestCommonSuperType , make , promote , registerTypeForClass , setName , setReflectClass , setSignature , signatureLength , signatureLength , signatureToName , signatureToPrimitive , signatureToType , signatureToType , swappedCompareResult , toString |
ObjectType
protected ObjectType()
ObjectType
public ObjectType(String name)
coerceFromObject
public Object coerceFromObject(Object obj)
Convert an object to a value of this Type.
Throw a ClassCastException when this is not possible.
- coerceFromObject in interface Type
compare
public 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.
"Same member" 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
not 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.
- compare in interface Type
emitCoerceFromObject
public void emitCoerceFromObject(CodeAttr code)
Compile (in given method) cast from Object to this Type.
- emitCoerceFromObject in interface Type
getImplementationType
public Type getImplementationType()
The type used to implement types not natively understood by the JVM.
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 JVM level,
and known at compile time.
- getImplementationType in interface Type
getInternalName
public String getInternalName()
Returns class name if a class type, signature if an array type.
In both cases, uses '/' rather than '.' after packages prefixes.
Seems rather arbitrary - but that is how classes are represented
in the constant pool (CONSTANT_Class constants).
Also, Class.forName is the same, except using '.'.
getReflectClass
public Class getReflectClass()
Get the java.lang.Class object for the representation type.
- getReflectClass in interface Type
isExisting
public final boolean isExisting()
setExisting
public final void setExisting(boolean existing)