Package gnu.bytecode
Class ObjectType
- java.lang.Object
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- gnu.bytecode.Type
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- gnu.bytecode.ObjectType
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- All Implemented Interfaces:
Type
- Direct Known Subclasses:
ArrayType
,ClassType
,InlineCalls.ProcedureInCallContext
,InlineCalls.ValueNeededType
,LazyType
,MappedArrayType
,NodeType
,ParameterizedType
,SingletonType
,SpecialObjectType
,TypeVariable
,UninitializedType
public abstract class ObjectType extends Type
Semi-abstract class object reference types.Extended by ClassType and ArrayType.
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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
Fields Modifier and Type Field Description int
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 Modifier Constructor Description protected
ObjectType()
ObjectType(String name)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description Object
coerceFromObject(Object obj)
Convert an object to a value of this Type.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.static Class
getContextClass(String cname)
Get named class using context class loader.static ClassLoader
getContextClassLoader()
Field
getField(String name, int mask)
ClassType[]
getInterfaces()
String
getInternalName()
Returns class name if a class type, signature if an array type.Method
getMethod(String name, Type[] arg_types)
int
getMethods(Filter filter, int searchSupers, List<Method> result)
int
getMethods(Filter filter, int searchSupers, Vector result, String context)
Deprecated.Class
getReflectClass()
Get the java.lang.Class object for the representation type.ClassType
getSuperclass()
boolean
isExisting()
boolean
isInstance(Object obj)
void
setExisting(boolean existing)
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Methods inherited from class gnu.bytecode.Type
coerceToObject, emitCoerceToObject, emitConvertFromPrimitive, emitIsInstance, getGenericSignature, getImplementationType, 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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ObjectType
protected ObjectType()
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ObjectType
public ObjectType(String name)
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Method Detail
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isExisting
public final boolean isExisting()
- Overrides:
isExisting
in classType
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setExisting
public final void setExisting(boolean existing)
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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 '.'.
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getContextClass
public static Class getContextClass(String cname) throws ClassNotFoundException
Get named class using context class loader. If the security policy prohibits that, fall back to this class's loader.- Throws:
ClassNotFoundException
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getContextClassLoader
public static ClassLoader getContextClassLoader()
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getReflectClass
public Class getReflectClass()
Get the java.lang.Class object for the representation type.- Overrides:
getReflectClass
in classType
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isInstance
public boolean isInstance(Object obj)
- Overrides:
isInstance
in classType
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getSuperclass
public ClassType getSuperclass()
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getInterfaces
public ClassType[] getInterfaces()
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getMethods
@Deprecated public final int getMethods(Filter filter, int searchSupers, Vector result, String context)
Deprecated.
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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.
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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.- Specified by:
coerceFromObject
in classType
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emitCoerceFromObject
public void emitCoerceFromObject(CodeAttr code)
Compile (in given method) cast from Object to this Type.- Overrides:
emitCoerceFromObject
in classType
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