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// Class.h - Header file for java.lang.Class. -*- c++ -*-
/* Copyright (C) 1998, 1999 Cygnus Solutions
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
// Written primary using compiler source and Class.java as guides.
#ifndef __JAVA_LANG_CLASS_H__
#define __JAVA_LANG_CLASS_H__
#pragma interface
#include <java/lang/Object.h>
#include <java/lang/String.h>
#include <java/net/URL.h>
// We declare these here to avoid including cni.h.
extern "C" void _Jv_InitClass (jclass klass);
extern "C" void _Jv_RegisterClasses (jclass *classes);
// These are the possible values for the `state' field of the class
// structure. Note that ordering is important here; in particular
// `resolved' must come between `nothing' and the other states.
// Whenever the state changes, one should notify all waiters of this
// class.
#define JV_STATE_NOTING 0 // set by compiler
#define JV_STATE_PRELOADING 1 // can do _Jv_FindClass
#define JV_STATE_LOADING 3 // has super installed
#define JV_STATE_LOADED 5 // is complete
#define JV_STATE_COMPILED 6 // this was a compiled class
#define JV_STATE_PREPARED 7 // layout & static init done
#define JV_STATE_LINKED 9 // strings interned
#define JV_STATE_IN_PROGRESS 10 // <clinit> running
#define JV_STATE_DONE 12 //
#define JV_STATE_ERROR 14 // must be last
struct _Jv_Field;
struct _Jv_VTable;
struct _Jv_Constants
{
jint size;
jbyte *tags;
_Jv_word *data;
};
struct _Jv_Method
{
_Jv_Utf8Const *name;
_Jv_Utf8Const *signature;
unsigned short accflags;
void *ncode;
};
#define JV_PRIMITIVE_VTABLE ((_Jv_VTable *) -1)
class java::lang::Class : public java::lang::Object
{
public:
static jclass forName (jstring className);
JArray<jclass> *getClasses (void);
java::lang::ClassLoader *getClassLoader (void)
{
return loader;
}
jclass getComponentType (void)
{
return isArray () ? (* (jclass *) &methods) : 0;
}
java::lang::reflect::Constructor *getConstructor (JArray<jclass> *);
JArray<java::lang::reflect::Constructor *> *getConstructors (void);
java::lang::reflect::Constructor *getDeclaredConstructor (JArray<jclass> *);
JArray<java::lang::reflect::Constructor *> *getDeclaredConstructors (void);
java::lang::reflect::Field *getDeclaredField (jstring);
JArray<java::lang::reflect::Field *> *getDeclaredFields (void);
java::lang::reflect::Method *getDeclaredMethod (jstring, JArray<jclass> *);
JArray<java::lang::reflect::Method *> *getDeclaredMethods (void);
JArray<jclass> *getDeclaredClasses (void);
jclass getDeclaringClass (void);
java::lang::reflect::Field *getField (jstring);
private:
java::lang::reflect::Field *getField (jstring, jint);
public:
JArray<java::lang::reflect::Field *> *getFields (void);
JArray<jclass> *getInterfaces (void);
java::lang::reflect::Method *getMethod (jstring, JArray<jclass> *);
JArray<java::lang::reflect::Method *> *getMethods (void);
jint getModifiers (void)
{
return accflags;
}
jstring getName (void);
java::net::URL *getResource (jstring resourceName);
java::io::InputStream *getResourceAsStream (jstring resourceName);
JArray<jobject> *getSigners (void);
jclass getSuperclass (void)
{
return superclass;
}
jboolean isArray (void)
{
return name->data[0] == '[';
}
jboolean isAssignableFrom (jclass cls);
jboolean isInstance (jobject obj);
jboolean isInterface (void);
jboolean isPrimitive (void)
{
return vtable == JV_PRIMITIVE_VTABLE;
}
jobject newInstance (void);
jstring toString (void);
// FIXME: this probably shouldn't be public.
jint size (void)
{
return size_in_bytes;
}
// finalization
void finalize ();
private:
void checkMemberAccess (jint flags);
// Various functions to handle class initialization.
java::lang::Throwable *hackTrampoline (jint, java::lang::Throwable *);
void hackRunInitializers (void);
void initializeClass (void);
// Friend functions implemented in natClass.cc.
friend _Jv_Method *_Jv_GetMethodLocal (jclass klass, _Jv_Utf8Const *name,
_Jv_Utf8Const *signature);
friend void _Jv_InitClass (jclass klass);
friend jfieldID JvGetFirstInstanceField (jclass);
friend jint JvNumInstanceFields (jclass);
friend jobject _Jv_AllocObject (jclass, jint);
friend jobjectArray _Jv_NewObjectArray (jsize, jclass, jobject);
friend jobject _Jv_NewPrimArray (jclass, jint);
friend jobject _Jv_JNI_ToReflectedField (_Jv_JNIEnv *, jclass, jfieldID);
friend jfieldID _Jv_FromReflectedField (java::lang::reflect::Field *);
friend jmethodID _Jv_FromReflectedMethod (java::lang::reflect::Method *);
friend class _Jv_PrimClass;
// Friends classes and functions to implement the ClassLoader
friend class java::lang::ClassLoader;
friend void _Jv_WaitForState (jclass, int);
friend void _Jv_RegisterClasses (jclass *classes);
friend void _Jv_RegisterInitiatingLoader (jclass,java::lang::ClassLoader*);
friend void _Jv_UnregisterClass (jclass);
friend jclass _Jv_FindClass (_Jv_Utf8Const *name,
java::lang::ClassLoader *loader);
friend jclass _Jv_FindClassInCache (_Jv_Utf8Const *name,
java::lang::ClassLoader *loader);
friend jclass _Jv_FindArrayClass (jclass element,
java::lang::ClassLoader *loader);
friend jclass _Jv_NewClass (_Jv_Utf8Const *name, jclass superclass,
java::lang::ClassLoader *loader);
friend void _Jv_PrepareCompiledClass (jclass);
#ifdef INTERPRETER
friend jboolean _Jv_IsInterpretedClass (jclass);
friend void _Jv_InitField (jobject, jclass, _Jv_Field*);
friend _Jv_Method* _Jv_LookupDeclaredMethod (jclass, _Jv_Utf8Const *,
_Jv_Utf8Const*);
friend int _Jv_DetermineVTableIndex (jclass, _Jv_Utf8Const *,
_Jv_Utf8Const*);
friend void _Jv_InitField (jobject, jclass, int);
friend _Jv_word _Jv_ResolvePoolEntry (jclass, int);
friend void _Jv_PrepareClass (jclass);
friend class _Jv_ClassReader;
friend class _Jv_InterpClass;
friend class _Jv_InterpMethod;
friend class _Jv_InterpMethodInvocation;
#endif
#ifdef JV_MARKOBJ_DECL
friend JV_MARKOBJ_DECL;
#endif
// Chain for class pool.
jclass next;
// Name of class.
_Jv_Utf8Const *name;
// Access flags for class.
unsigned short accflags;
// The superclass, or null for Object.
jclass superclass;
// Class constants.
_Jv_Constants constants;
// Methods. If this is an array class, then this field holds a
// pointer to the element type. If this is a primitive class, this
// is used to cache a pointer to the appropriate array type.
_Jv_Method *methods;
// Number of methods. If this class is primitive, this holds the
// character used to represent this type in a signature.
short method_count;
// Number of methods in the vtable.
short vtable_method_count;
// The fields.
_Jv_Field *fields;
// Size of instance fields, in bytes.
int size_in_bytes;
// Total number of fields (instance and static).
short field_count;
// Number of static fields.
short static_field_count;
// The vtbl for all objects of this class.
_Jv_VTable *vtable;
// Interfaces implemented by this class.
jclass *interfaces;
// The class loader for this class.
java::lang::ClassLoader *loader;
// Number of interfaces.
short interface_count;
// State of this class.
jbyte state;
// The thread which has locked this class. Used during class
// initialization.
java::lang::Thread *thread;
};
#endif /* __JAVA_LANG_CLASS_H__ */
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