/*
* Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.apple.jobjc;
import java.lang.ref.WeakReference;
import java.lang.reflect.Constructor;
public class NSClass<T extends ID> extends ID {
public static class NSClassNotFoundException extends RuntimeException{
public NSClassNotFoundException(String m){ super(m); }
public NSClassNotFoundException(String m, Throwable cause){ super(m, cause); }
}
static native long getNativeClassByName(String name);
static native long getSuperClassOfClass(long classPtr);
static native String getClassNameOfClass(long classPtr);
static native long getClass(long objPtr);
public NSClass(final long ptr, final JObjCRuntime runtime) {
super(ptr, runtime);
}
public NSClass(final String name, final JObjCRuntime runtime) {
this(getNativeClassByName(name), runtime);
if(ptr == 0) throw new NSClassNotFoundException("NSClass pointer is 0. Found no class named " + name);
}
protected NSClass(final JObjCRuntime runtime){
super(0, runtime);
final String sn = getClass().getSimpleName();
final String name = sn.substring(0, sn.lastIndexOf("Class"));
ptr = getNativeClassByName(name);
if(ptr == 0) throw new NSClassNotFoundException("NSClass pointer is 0. Found no class named " + name);
}
NSClass<? super T> getSuperClass() {
return new NSClass<T>(getSuperClassOfClass(ptr), runtime);
}
String getClassName() { return getClassNameOfClass(ptr); }
@Override protected NativeObjectLifecycleManager getNativeObjectLifecycleManager() {
return NativeObjectLifecycleManager.Nothing.INST;
}
@Override public boolean equals(Object o){
return (o instanceof NSClass) && (this.ptr == ((NSClass) o).ptr);
}
//
static <T extends NSClass> T getObjCClassFor(final JObjCRuntime runtime, final long clsPtr){
if (clsPtr == 0) return null;
final WeakReference cachedObj = objectCache.get().get(clsPtr);
if(cachedObj != null && cachedObj.get() != null) return (T) cachedObj.get();
final T newObj = (T) createNewObjCClassFor(runtime, clsPtr);
objectCache.get().put(clsPtr, new WeakReference(newObj));
return newObj;
}
static <T extends NSClass> T createNewObjCClassFor(final JObjCRuntime runtime, final long clsPtr) {
final Constructor<T> ctor = getNSClassConstructorForClassPtr(runtime, clsPtr);
return (T) createNewObjCObjectForConstructor(ctor, clsPtr, runtime);
}
@SuppressWarnings("unchecked")
static <T extends NSClass> Constructor<T> getNSClassConstructorForClassPtr(final JObjCRuntime runtime, final long clazzPtr){
final Class<T> clazz = getNSClassForClassPtr(runtime, clazzPtr);
Constructor<T> ctor;
try {
ctor = clazz.getDeclaredConstructor(CTOR_ARGS);
} catch (SecurityException e) {
throw new RuntimeException(e);
} catch (NoSuchMethodException e) {
throw new RuntimeException(e);
}
ctor.setAccessible(true);
return ctor;
}
@SuppressWarnings("unchecked")
static <T extends ID> Class<T> getNSClassForClassPtr(final JObjCRuntime runtime, final long clazzPtr){
final String className = NSClass.getClassNameOfClass(clazzPtr);
final Class<T> clazz = (Class<T>) runtime.getClassForNativeClassName(className + "Class");
if(clazz == null){
final long superClazzPtr = NSClass.getSuperClassOfClass(clazzPtr);
if(superClazzPtr != 0)
return getNSClassForClassPtr(runtime, superClazzPtr);
}
return clazz;
}
}