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Gabriel Tofvesson 2016-10-22 21:36:45 +04:00
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11
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GNU GENERAL PUBLIC LICENSE
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you grant is automatically extended to all recipients of the covered
work and works based on it.
A patent license is "discriminatory" if it does not include within
the scope of its coverage, prohibits the exercise of, or is
conditioned on the non-exercise of one or more of the rights that are
specifically granted under this License. You may not convey a covered
work if you are a party to an arrangement with a third party that is
in the business of distributing software, under which you make payment
to the third party based on the extent of your activity of conveying
the work, and under which the third party grants, to any of the
parties who would receive the covered work from you, a discriminatory
patent license (a) in connection with copies of the covered work
conveyed by you (or copies made from those copies), or (b) primarily
for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you may
not convey it at all. For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.
13. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.
14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU General Public License, you may choose any version ever published
by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
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16. Limitation of Liability.
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THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
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USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
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PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

20
README.txt Normal file
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This file is part of Async.
libGTools is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
libGTools 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 for more details.
You should have received a copy of the GNU General Public License
along with libGTools. If not, see <http://www.gnu.org/licenses/>.
For further questions regarding your rights to libGTools, please contact Gabriel Tofvesson either by email at
gabriel.tofvesson@gmail.com
or by mail at
Bo Bergmans gata 9, 115 50, Stockholm, Sweden
Contacting these addresses under false pretences and/or with malicious intent (for example sending more than two messages without response from the recipient) is not permissible.

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<?xml version="1.0" encoding="UTF-8"?>
<module type="JAVA_MODULE" version="4">
<component name="NewModuleRootManager" inherit-compiler-output="true">
<exclude-output />
<content url="file://$MODULE_DIR$">
<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
</content>
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
<orderEntry type="library" name="asm-all-5.1" level="project" />
</component>
</module>

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package com.tofvesson.async;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
@SuppressWarnings({"WeakerAccess", "unused"})
public class Async {
Thread task;
volatile Object ret; // Assigned using native method
volatile boolean complete = false, failed = false; // Used by anonymous class, therefore not private
volatile Throwable t;
/**
* Initiates an async task that invokes the defined method. If object is null, the method must be static.
* Note that this is optimized for larger tasks id est tasks that take more than 5 milliseconds to process (preferably a minimum of 10 ms).
* @param o Object to invoke method on.
* @param method Method to invoke.
* @param params Required parameters.
*/
public Async(final Object o, final Method method, final Object... params){
method.setAccessible(true);
//Lambdas are compiled into more methods than anonymous class and don't decrease overhead
//noinspection Convert2Lambda
task = new Thread(new Runnable() {
@Override
public void run() {
synchronized (this) { try { ret = method.invoke(o, params); complete = true; }
catch (Throwable t1) { if(!failed) { failed = true; t=t1; } } }
}
});
task.setDaemon(true);
task.start();
}
/**
* Create a new async task for instantiating an object.
* @param c Constructor to use when instantiating object.
* @param params Parameters to use when instantiaing object.
*/
public Async(final Constructor c, final Object... params){
c.setAccessible(true);
//Lambdas are compiled into more methods than anonymous class and don't decrease overhead
//noinspection Convert2Lambda
task = new Thread(new Runnable() {
@Override
public void run() {
synchronized (this) { try { ret = c.newInstance(params); } catch (Throwable t1) { if(!failed) { failed = true; t=t1; } } }
}
});
task.setDaemon(true);
task.start();
}
Async() {task = null;} // Only package-scoped because it should only be used when overriding standard construction
/**
* Await completion of async task. Blocks thread if task isn't complete.
* @return Return value from async method call. Return is null if {@link #cancel()} is called before this method and async task wan't finished.
*/
public Object await(){
//noinspection StatementWithEmptyBody
while(!failed && !complete); // Check using variables rather than checking if worker thread is alive since method calls are more computationally expensive
if(ret==null && t!=null) throw new RuntimeException(t); // Detect a unique error state, get error and throw in caller thread
//noinspection unchecked
return ret; // Don't bother resetting values since this object is only intended to be recycled after value is gotten
}
/**
* Checks if async task is still running.
* @return True if it's still running.
*/
public boolean isAlive(){ return task.isAlive(); }
/**
* Cancels async operation if it's still alive.
*/
public void cancel(){
if(task.isAlive()){
// Set values before interrupting to prevent InterruptedException from
// being propagated and thrown in the main thread
t=null;
failed = true; // Creates a unique and identifiable state
task.interrupt();
}
}
}

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src/com/tofvesson/async/EcoAsync$1.java Normal file
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package com.tofvesson.async;
import java.lang.reflect.Method;
/**
* Pre-written anonymous class. Follows all naming conventions of an anonymous class, acts like an anonymous class and handles data like an anonymous class.
* It just isn't an anonymous class technically speaking...
*/
class EcoAsync$1 implements Runnable{
private final EcoAsync this$0;
private final Object val$o;
private final Method val$method;
private final Object[] val$params;
EcoAsync$1(EcoAsync this$0, Object val$o, Method val$method, Object[] val$params){
this.this$0 = this$0;
this.val$o = val$o;
this.val$method = val$method;
this.val$params = val$params;
}
@Override
public void run() {
synchronized (this) {
try {
this$0.ret = val$method.invoke(val$o, val$params);
} catch (Throwable t1) {
if(!this$0.failed)
{
this$0.failed = true; this$0.t=t1;
}
} finally {
this$0.newThread(val$o, val$method, val$params);
}
}
}
}

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src/com/tofvesson/async/EcoAsync.java Normal file
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package com.tofvesson.async;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
public class EcoAsync extends Async {
private static final Field threadTarget, runnableObjToCall, runnableMethod, runnableParams;
private Thread previousThread;
static{
Field f4 = null, f3 = null, f2 = null, f1 = null;
try{
f1 = Thread.class.getDeclaredField("target");
f1.setAccessible(true);
f2 = EcoAsync$1.class.getDeclaredField("val$o");
f2.setAccessible(true);
f3 = EcoAsync$1.class.getDeclaredField("val$method");
f3.setAccessible(true);
f4 = EcoAsync$1.class.getDeclaredField("val$params");
f4.setAccessible(true);
}catch(Exception ignored){}
threadTarget = f1;
runnableObjToCall = f2;
runnableMethod = f3;
runnableParams = f4;
}
/**
* Initiates an economic version of async task that invokes the defined method. If object is null, the method must be static.
* Note that though this is optimized for larger tasks id est tasks that take more than 5 milliseconds to process, this class was designed with re-usability in mind and, as such, doesn't have to be re-instantiated
* to call the same method asynchronously.
* All-in-all, this means that this class is meant to be instantiated once but invoked multiple times.
* This memory efficiency has the minor draw-back of executing a couple more (2-3) lines of code to allow for re-usability.
*
* @param o Object to invoke method on.
* @param method Method to invoke.
* @param params Required parameters.
* @param runOnConstruction If true, object will run async task after construction.
*/
public EcoAsync(boolean runOnConstruction, Object o, Method method, Object... params) {
super();
method.setAccessible(true);
// Don't call super since we are constructing a custom version
newThread(o, method, params);
if(runOnConstruction) try{ task.start(); }catch(Exception ignored){}
}
/**
* Initiates an economic version of async task that constructs an object using the supplied constructor.
* Note that though this is optimized for larger tasks id est tasks that take more than 5 milliseconds to process, this class was designed with
* re-usability in mind and, as such, doesn't have to be re-instantiated to call the same constructor asynchronously.
* All-in-all, this means that this class is meant to be instantiated once but invoked multiple times.
* This memory efficiency has the minor draw-back of executing a couple more (2-3) lines of code to allow for re-usability.
*
* @param runOnConstruction Whether or not to construct object during construction time.
* @param c Constructor to use when constructing.
* @param params Parameter to use when constructing.
*/
public EcoAsync(boolean runOnConstruction, Constructor c, Object... params){
super();
c.setAccessible(true);
try {
Method m = EcoAsync.class.getMethod("constructObject", Constructor.class, Object[].class);
newThread(null, m, c, params);
} catch (NoSuchMethodException e) { }
if(runOnConstruction) try{ task.start(); }catch(Exception ignored){}
}
@Override
public Object await() {
//noinspection StatementWithEmptyBody
while(!failed && !complete);
if(ret==null && t!=null){
Throwable t = super.t; // Added for re-usability
super.t = null; // Added for re-usability
throw new RuntimeException(t);
}
return ret;
}
@Override
public boolean isAlive() {
return !super.failed && !complete && previousThread!=null; // Due to the overridden operation, we need another way of checking if worker is alive.
}
@Override
public void cancel() {
previousThread = task;// Store a reference to the previous thread
super.cancel();
while(previousThread.isAlive()) ;
complete = false;
failed = false;
ret = null;
}
/**
* Used to start/restart execution of supplied method. Cancels previous operation it it's still alive.
*/
public void start(){
if(isAlive()) cancel();
// Dig parameters out from memory rather than wasting space with our own copy
try {
EcoAsync$1 t_run = (EcoAsync$1) threadTarget.get(task);
newThread(runnableObjToCall.get(t_run),
(Method) runnableMethod.get(t_run),
(Object[]) runnableParams.get(t_run));
task.start();
} catch (IllegalAccessException ignored) { }
}
void newThread(Object o, Method method, Object... params){
previousThread = null;
try {
task = new Thread(new EcoAsync$1(this, o, method, params), "Worker_"+method.getDeclaringClass().getName()+"_"+method.getName());
task.setDaemon(true);
} catch (Exception ignored) { }
}
private static Object constructObject(Constructor c, Object[] params)
throws IllegalAccessException, InvocationTargetException, InstantiationException {
return c.newInstance(params);
}
}

69
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package com.tofvesson.async;
import jdk.internal.org.objectweb.asm.ClassWriter;
import jdk.internal.org.objectweb.asm.MethodVisitor;
import static org.objectweb.asm.Opcodes.*;
public class Test {
public Test(){}
public static void main(String[] args) throws Exception {
// Create new class with an automatically calculated max variable and constant pool
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
// Start visiting class
cw.visit(V1_8 /* Version of Java to compile with */,
ACC_PUBLIC /* Access permissions */,
"TClass", /* Simple class name */
"Lcom/tofvesson/async/TClass;", /* Fully qualified class signature */
"Ljava/lang/Object;", /* Superclass */
null /* Interfaces */
);
// Start visiting constructor "TClass()"
MethodVisitor mv = cw.visitMethod(
ACC_PUBLIC, /* Access permissions */
"<init>", /* Method name */
"Lcom/tofvesson/async/TClass;", /* Method descriptor */
"()V", /* Method signature */
null /* Exceptions */
);
// Invoke super() on inherited Object
mv.visitVarInsn(ALOAD, 0); // Load "this" from local constant pool and put on stack
mv.visitMethodInsn(
INVOKESPECIAL, /* How to invoke method ("Special" for invoking super()) */
"java/lang/Object", /* Class where method is defined */
"<init>", /* Method to invoke */
"()V", /* Target method signature */
false /* Is target object an object generified to an interface (interface method) */
);
mv.visitMethodInsn(INVOKESTATIC, "com/tofvesson/async/Test", "test", "()V", false);
// Return
mv.visitInsn(RETURN);
// Stop visiting constructor
mv.visitEnd();
// Stop visiting class
cw.visitEnd();
}
public void run(){
System.out.println("Hello");
}
private static void test(){ System.out.println("Called incorrectly"); }
}

98
src/com/tofvesson/async/WorkerThread.java Normal file
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package com.tofvesson.async;
import javafx.util.Pair;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.*;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ThreadLocalRandom;
/**
* A thread tasked with accepting multiple instructions. This is useful for people who don't want to constantly create new threads for heavy work.
* Also good if the fields in an object instantiated in this thread aren't volatile.
*/
public class WorkerThread extends Thread {
List<Long> ids = new ArrayList<>();
volatile Queue<Pair<Long, Pair<Method, Pair<Object, Object>>>> queue;
volatile Map<Long, Object> output = new HashMap<>();
volatile boolean alive=true, completed=false;
/**
* Create a WorkerThread.
* @param queueSize Maximum amount of instructions to be queued.
*/
public WorkerThread(int queueSize){
super();
try{
Field f = Thread.class.getDeclaredField("target");
f.setAccessible(true);
f.set(this, (Runnable) ()->
{
synchronized (Thread.currentThread()) {
while (alive) {
if (queue.size() != 0) {
Pair<Long, Pair<Method, Pair<Object, Object>>> q = queue.poll();
Pair<Method, Pair<Object, Object>> instr = q.getValue();
try {
output.put(q.getKey(), instr.getKey().invoke(instr.getValue().getKey(), (Object[]) instr.getValue().getValue()));
completed = true;
} catch (IllegalAccessException | InvocationTargetException e) {
e.printStackTrace();
}
}
}
}
});
}catch(Exception e){}
queue = new ArrayBlockingQueue<>(queueSize);
}
/**
* Add a new instruction for the worker thread.
* @param invokeOn Object to invoke method on.
* @param m Method to invoke.
* @param params Parameters for method.
* @return A UID corresponding to the queued instruction.
*/
public long enqueue(Object invokeOn, Method m, Object... params){
m.setAccessible(true);
long id;
do{ id = ThreadLocalRandom.current().nextLong(); }while(ids.contains(id));
queue.add(new Pair<>(id, new Pair<>(m, new Pair<>(invokeOn, params))));
ids.add(id);
return id;
}
/**
* Waits for instruction to be processed and return value to be acquired.
* @param id UID of the supplied instruction.
* @return Return value from instruction called in worker thread.
*/
public Object pop(long id){
if(!ids.contains(id)) return null;
if(Thread.currentThread() == this) throw new RuntimeException("Attempting to await result in worker thread! This causes the thread to lock.");
while(!output.containsKey(id)) ; // Block caller thread until result is received
Object o = output.get(id);
output.remove(id);
ids.remove(id);
return o;
}
/**
* Waits for current method invocation to finish before stopping thread.
*/
public void stopGraceful(){
alive = false;
}
/**
* Interrupts thread to kill it. NOTE: This method is unsafe and could cause issues if it is performing an I/O operation.
* Only call this if you are 100% sure that it won't break something or if are ready to deal with the consequences.
*/
public void stopForced(){
alive = false;
interrupt();
}
}

59
src/com/tofvesson/hacks/ClassHacks.java Normal file
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package com.tofvesson.hacks;
import jdk.internal.org.objectweb.asm.ClassReader;
import jdk.internal.org.objectweb.asm.ClassWriter;
import jdk.internal.org.objectweb.asm.MethodVisitor;
import sun.misc.Unsafe;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import static org.objectweb.asm.Opcodes.*;
public class ClassHacks {
public static <T> Class<T> injectField(Class<T> target, Object toInject, String name) throws IOException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {
try{ // Get unsafe
Field f = target.getDeclaredField(name);
f.setAccessible(true);
Field f1 = Unsafe.class.getDeclaredField("theUnsafe");
f1.setAccessible(true);
f.set(((Unsafe)f1.get(null)).allocateInstance(target), toInject); // Check if field exists
}catch(Exception e){} // Will never happen
// Read from class
ClassReader cr = new ClassReader(target.getClassLoader().getResourceAsStream(target.getName().replace(".", "/")+".class"));
ClassWriter cw = new ClassWriter(cr, ClassWriter.COMPUTE_MAXS); // Prepare to write
// Get all fully defined interface class names
String[] itf = new String[target.getInterfaces().length];
for(int i = 0; i<itf.length; ++i) itf[i] = target.getInterfaces()[i].getName().replace(".", "/");
// Create class definition
cw.visit(V1_8, ACC_PUBLIC, target.getSimpleName(), "L"+target.getName().replace(".", "/")+";",
target.getSuperclass().getName().replace(".", "/"), itf);
// Define blank constructor
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", "L"+target.getName().replace(".", "/")+";", null);
mv.visitVarInsn(ALOAD, 0); // Load "this" reference
mv.visitMethodInsn(INVOKESPECIAL, target.getSuperclass().getName().replace(".", "/"), "<init>", "()V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
// Define field
cw.visitField(ACC_PUBLIC, name, "L"+toInject.getClass().getName().replace(".", "/")+";", null, toInject).visitEnd();
// Finish modifications
cw.visitEnd();
try{
Method m = ClassLoader.class.getDeclaredMethod("defineClass", String.class, byte[].class, int.class, int.class);
m.setAccessible(true);
byte[] b;
return (Class<T>) m.invoke(target.getClassLoader(), target.getSimpleName(), b=cw.toByteArray(), 0, b.length); // Redefine class
}catch(Exception e){ e.printStackTrace(); }
throw new RuntimeException("Something went very wrong");
}
}

49
src/com/tofvesson/hacks/Reloader.java Normal file
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package com.tofvesson.hacks;
import sun.misc.Unsafe;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;
import static java.lang.reflect.Modifier.STATIC;
public class Reloader {
private static final List<Object> reload = new ArrayList<>();
public void reloadAll(){}
public void reloadClasses(Class<?>... c) throws ClassNotFoundException {
final boolean[] b = {false};
reload.stream().filter(o->{
for(Class<?> c1 : c) b[0] = b[0] || (b[0]= o!=null && c1.isAssignableFrom(o.getClass()));
return b[0];
}); // Check if class needs reloading
if(!b[0]) return;
Unsafe u = null;
try {
Field f = Unsafe.class.getDeclaredField("theUnsafe");
f.setAccessible(true);
u = (Unsafe) f.get(null);
} catch (Exception ignored) {}
if(u==null) throw new RuntimeException("Something went very wrong! Unsafe reference is null.");
List<Object> reloaded = new ArrayList<>();
reload.stream().filter(o->{
for(Class<?> c1 : c) if(c1.isAssignableFrom(o.getClass())) return true;
return false;
}).forEach(reloaded::add); // Move all objects to be reloaded to a holder
reload.removeAll(reloaded);
for(Class<?> c1 : c) c1.getClassLoader().loadClass(c1.getName()); // Re load class in classloader
for(Object o : reloaded){
try{
Class<?> reloadedClass = Class.forName(o.getClass().getName());
Object o1 = u.allocateInstance(reloadedClass);
for(Field f : o.getClass().getDeclaredFields()){
f.setAccessible(true);
try{
Field f1 = reloadedClass.getDeclaredField(f.getName());
f1.setAccessible(true);
f1.set((f1.getModifiers()&STATIC)==STATIC?null:o1, f.get((f.getModifiers()&STATIC)==STATIC?null:o));
}catch(Exception ignored){}
}
}catch(Exception ignored){}
}
}
}

5
src/com/tofvesson/logging/Tag.java Normal file
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package com.tofvesson.logging;
public interface Tag {
String apply(String output);
}

36
src/com/tofvesson/logging/TagStream.java Normal file
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package com.tofvesson.logging;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.List;
public class TagStream extends PrintStream {
private final OutputStream node;
private List<Tag> tags = new ArrayList<>();
public TagStream(PrintStream node){
super(node);
this.node = node;
}
public TagStream(OutputStream end){
super(end);
this.node = end;
}
public List<Tag> getTags(){ return tags; }
public void addTag(Tag t){ tags.add(t); }
public void removeTag(Tag t){ tags.remove(t); }
public void removeTag(int index){ tags.remove(index); }
@Override
public void print(String s){
if(s==null) s="null";
for(Tag t : tags) s = t.apply(s);
if(node instanceof PrintStream) ((PrintStream)node).print(s);
else try { node.write(s.getBytes()); } catch (IOException e) { e.printStackTrace(); }
}
}

114
src/com/tofvesson/reflection/EnumDefinition.java Normal file
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package com.tofvesson.reflection;
import java.util.HashMap;
/**
* A definition for custom enum creation.
*/
public class EnumDefinition {
HashMap<Object, Class> params = new HashMap<>(); // Assign a specific type to each parameter
/**
* Put an object in the parameter list.
* @param value The parameter to supply. (Type is derived automatically)
* @return A reference to the EnumDefinition object this method was called on (for chaining).
*/
public EnumDefinition putObject(Object value){
params.put(value, value.getClass());
return this;
}
/**
* Put a primitive value in the parameter list.
* @param autoBoxed An autoboxed version of the parameter. (For example putPrimitive(5) will automatically become Integer)
* @return A reference to the EnumDefinition object this method was called on (for chaining).
* @throws NoSuchFieldException
*/
public EnumDefinition putPrimitive(Object autoBoxed) throws NotAutoBoxedException{
// All autoboxed versions of primitives have a reference to their boxed primitive
try {
params.put(autoBoxed, autoBoxed.getClass().getDeclaredField("value").getType());
}catch(Exception e){ throw new NotAutoBoxedException(); }
return this;
}
/**
* Safe wrapper of {@link #putPrimitive(Object)} for boolean.
* @param b Boolean parameter.
* @return A reference to the EnumDefinition object this method was called on (for chaining).
*/
public EnumDefinition putBoolean(boolean b){
try { return putPrimitive(b); } catch (NotAutoBoxedException e) { }
return this;
}
/**
* Safe wrapper of {@link #putPrimitive(Object)} for byte.
* @param b Byte parameter.
* @return A reference to the EnumDefinition object this method was called on (for chaining).
*/
public EnumDefinition putByte(byte b){
try { return putPrimitive(b); } catch (NotAutoBoxedException e) { }
return this;
}
/**
* Safe wrapper of {@link #putPrimitive(Object)} for char.
* @param c Character parameter.
* @return A reference to the EnumDefinition object this method was called on (for chaining).
*/
public EnumDefinition putChar(char c){
try { return putPrimitive(c); } catch (NotAutoBoxedException e) { }
return this;
}
/**
* Safe wrapper of {@link #putPrimitive(Object)} for short.
* @param s Short parameter.
* @return A reference to the EnumDefinition object this method was called on (for chaining).
*/
public EnumDefinition putShort(short s){
try { return putPrimitive(s); } catch (NotAutoBoxedException e) { }
return this;
}
/**
* Safe wrapper of {@link #putPrimitive(Object)} for int.
* @param i Integer parameter.
* @return A reference to the EnumDefinition object this method was called on (for chaining).
*/
public EnumDefinition putInt(int i){
try { return putPrimitive(i); } catch (NotAutoBoxedException e) { }
return this;
}
/**
* Safe wrapper of {@link #putPrimitive(Object)} for long.
* @param l Long parameter.
* @return A reference to the EnumDefinition object this method was called on (for chaining).
*/
public EnumDefinition putLong(long l){
try { return putPrimitive(l); } catch (NotAutoBoxedException e) { }
return this;
}
/**
* Safe wrapper of {@link #putPrimitive(Object)} for float.
* @param f Floating point parameter.
* @return A reference to the EnumDefinition object this method was called on (for chaining).
*/
public EnumDefinition putFloat(float f){
try { return putPrimitive(f); } catch (NotAutoBoxedException e) { }
return this;
}
/**
* Safe wrapper of {@link #putPrimitive(Object)} for double.
* @param d Double parameter.
* @return A reference to the EnumDefinition object this method was called on (for chaining).
*/
public EnumDefinition putDouble(double d){
try { return putPrimitive(d); } catch (NotAutoBoxedException e) { }
return this;
}
}

111
src/com/tofvesson/reflection/Helper.java Normal file
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package com.tofvesson.reflection;
import sun.misc.Unsafe;
import sun.reflect.ConstructorAccessor;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
public class Helper {
/**
* Allows you to create a completely custom Enum value. If the supplied value already exists, it will be returned.
* will not be created; the value of the existing one will be updated.
* @param clazz The class to attribute the new enum to.
* @param addToValuesArray Whether or not to update the internal, "immutable" values array with the new value (ignored if value already exists).
* @return A new/existing enum.
*/
@SuppressWarnings("unchecked")
public static <T extends Enum<T>> T customEnum(Class<T> clazz, boolean addToValuesArray, String name, EnumDefinition def){
T u;
try {
// Get a reference to the static method values() and get values
Method v = clazz.getDeclaredMethod("values");
v.setAccessible(true);
T[] values = (T[]) v.invoke(null);
// Return object if it already exists
for(T u2 : values) if(u2.name().equals(name)) return u2;
// Generate enum parameter definition
Class[] paramList = new Class[def.params.size()+2];
paramList[0] = String.class; // Name
paramList[1] = int.class; // Ordinal
int iterator = paramList.length;
for(Class c : def.params.values()) paramList[--iterator] = c; // Shit's fucking reversed
// Get enum constructor (inherited from Enum.class)
Constructor c = clazz.getDeclaredConstructor(paramList);
c.setAccessible(true);
Method m = Constructor.class.getDeclaredMethod("acquireConstructorAccessor");
m.setAccessible(true);
// Get constructor accessor since Constructor.newInstance throws an exception because Enums are "immutable"
ConstructorAccessor access = (ConstructorAccessor) m.invoke(c);
Object[] parameters = new Object[def.params.size()+2];
parameters[0] = name;
parameters[1] = values.length;
iterator = parameters.length;
for(Object o : def.params.keySet()) parameters[--iterator] = o;
// Create new instance of enum with valid name and ordinal
u = (T) access.newInstance(parameters);
// Get the final name field from Enum.class and make it temporarily modifiable
Field f = Enum.class.getDeclaredField("name");
f.setAccessible(true);
// Rename the newly created enum to the requested name
f.set(u, name);
if(!addToValuesArray) return u; // Stops here if
// Get the current values field from Enum (a bitch to modify)
f = clazz.getDeclaredField("$VALUES");
f.setAccessible(true);
T[] $VALUES = (T[]) Array.newInstance(clazz, values.length+1);
System.arraycopy(values, 0, $VALUES, 0, values.length); // Copy over values from old array
$VALUES[values.length] = u; // Add out custom enum to our local array
// Start doing magic by getting an instance of sun.reflect.UnsafeQualifiedStaticObjectFieldAccessorImpl.class
// Class is package-local so we can't reference it by anything other than Object
m = Field.class.getDeclaredMethod("getFieldAccessor", Object.class);
m.setAccessible(true);
Object UQSOFAImpl = m.invoke(f, u);
// Get "isReadOnly" flag ($VALUES is always read-only even if Field.setAccessible(true) is called)
// Flag is located in superclass (sun.reflect.UnsafeQualifiedStaticFieldAccessorImpl.class (also fucking package-local))
// Set flag to 'false' to allow for modification against Java's will
Field f1 = UQSOFAImpl.getClass().getSuperclass().getDeclaredField("isReadOnly");
f1.setAccessible(true);
f1.setBoolean(UQSOFAImpl, false);
// Invoke set() method on UnsafeQualifiedStaticObjectFieldAccessorImpl object which sets the
// private field $VALUES to our new array
m = UQSOFAImpl.getClass().getDeclaredMethod("set", Object.class, Object.class);
m.setAccessible(true);
m.invoke(UQSOFAImpl, f, $VALUES);
} catch (Exception wrongParams) { throw new RuntimeException(wrongParams); }
return u;
}
/**
* Create a new object without the hassle of having to construct it. WARNING: Not usually a good idea.
* @param clazz Class to instantiate.
* @return An object instance of the supplied class that hasn't been constructed.
* @throws InstantiationException
*/
public static <T> T create(Class<T> clazz) throws InstantiationException{
try {
Field f = Unsafe.class.getDeclaredField("theUnsafe");
f.setAccessible(true);
//noinspection unchecked
return (T) ((Unsafe) f.get(null)).allocateInstance(clazz);
} catch (NoSuchFieldException | IllegalAccessException e) {
System.err.println("Whatever you did, it was VERY wrong! Stop it!");
e.printStackTrace();
return null;
}
}
}

7
src/com/tofvesson/reflection/NotAutoBoxedException.java Normal file
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package com.tofvesson.reflection;
public class NotAutoBoxedException extends Exception {
public NotAutoBoxedException(){ super(); }
public NotAutoBoxedException(Throwable t){ super(t); }
public NotAutoBoxedException(String reason){ super(reason); }
}

34
src/com/tofvesson/reflection/SafeReflection.java Normal file
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package com.tofvesson.reflection;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
public class SafeReflection {
public static Method getMethod(Class<?> c, String name, Class<?>... params){
try{
Method m = c.getDeclaredMethod(name, params);
m.setAccessible(true);
return m;
}catch(Exception e){}
return null;
}
public static Field getField(Class<?> c, String name){
try{
Field f = c.getDeclaredField(name);
f.setAccessible(true);
return f;
}catch(Exception e){}
return null;
}
public static Object getEnclosingClassObjectRef(Object nested){
try{
Field f = nested.getClass().getDeclaredField("this$0");
f.setAccessible(true);
return f.get(nested);
}catch(Exception e){}
return null;
}
public static boolean isNestedClass(Class<?> c){
return c.getEnclosingClass()!=null;
}
}