package org.simantics.scl.compiler.tests;

import java.lang.reflect.Method;

import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;

public class FindAllowedChars {
    public static class MyClassLoader extends ClassLoader {
        final String className;
        final byte[] classBytes;
        
        public MyClassLoader(ClassLoader parent, String className, byte[] classBytes) {
            super(parent);
            this.className = className;
            this.classBytes = classBytes;
        }
        
        public MyClassLoader(String className, byte[] classBytes) {
            this.className = className;
            this.classBytes = classBytes;
        }

        @Override
        protected Class<?> findClass(String name) throws ClassNotFoundException {
            if(name.equals(name))
                return defineClass(name, classBytes, 0, classBytes.length);
            else
                return super.findClass(name);
        }
    }
    
    public static void test(String className, String methodName) throws Exception {
        ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_MAXS);
        classWriter.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, className, null, "java/lang/Object", null);
        
        MethodVisitor methodVisitor = classWriter.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, methodName, "()V", null, null);
        /*methodVisitor.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
        methodVisitor.visitLdcInsn("Hello world!");
        methodVisitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);*/
        methodVisitor.visitInsn(Opcodes.RETURN);
        methodVisitor.visitMaxs(0, 0);
        methodVisitor.visitEnd();
        classWriter.visitEnd();
 
        ClassLoader loader = new MyClassLoader(className, classWriter.toByteArray());
        Class<?> clazz = loader.loadClass(className);
        Method method = clazz.getMethod(methodName);
        method.invoke(null);
    }
    
    public static void main(String[] args) throws Exception {
        for(int a=Character.MIN_VALUE;a<Character.MAX_VALUE;++a) {
            //for(char b=0;b<256;++b) {
                String name = new String(new char[] {(char)a});
                try {
                    test(name, "test");
                } catch(Throwable e) {
                    System.out.println(name + " (" + a + ")");
                }
            //}   
        }
        System.out.println((int)Character.MAX_VALUE);
    }
}