/**

  * Back 2 Browser Bytecode Translator

  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

  *

  * 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, version 2 of the License.

  *

  * 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. Look for COPYING file in the top folder.

  * If not, see http://opensource.org/licenses/GPL-2.0.

  */

 package org.apidesign.vm4brwsr;

 import java.io.IOException;

 import java.lang.annotation.Annotation;

 import java.lang.annotation.ElementType;

 import java.lang.annotation.Retention;

 import java.lang.annotation.RetentionPolicy;

 import java.lang.reflect.Method;

 import java.net.MalformedURLException;

 import org.apidesign.bck2brwsr.core.JavaScriptBody;

 /**

  *

  * @author Jaroslav Tulach <jtulach@netbeans.org>

  */

 @ClassesMarker(number = 10, nicknames = { "Ten", "Deset" }, count = ClassesMarker.E.TWO)

 @ClassesNamer(name = "my text")

 public class Classes {

     public static String nameOfIO() {

         return nameFor(IOException.class);

     }

     private static String nameFor(Class<?> c) {

         return c.getName();

     }

     private static final Class<?> PRELOAD = Runnable.class;

     private static final Class<?> PRELOAD2 = ClassesMarker.E.class;

     private static final Class<?> PRELOAD3 = RetentionPolicy.class;

     private static final Class<?> PRELOAD4 = ElementType.class;

     public static boolean isInterface(String s) throws ClassNotFoundException {

         return Class.forName(s).isInterface();

     }

     public static boolean equalsClassesOfExceptions() {

         return MalformedURLException.class.getSuperclass() == IOException.class;

     }

     public static boolean differenceInClasses() {

         Class<?> c1 = MalformedURLException.class;

         Class<?> c2 = IOException.class;

         return c1 != c2;

     }

     public static String classForInstance() {

         return new IOException().getClass().getName().toString();

     }

     @ClassesMarker(number = 1, nicknames = { "One", "Jedna" } )

     public static String name() {

         return IOException.class.getName().toString();

     }

     public static String simpleName() {

         return IOException.class.getSimpleName();

     }

     public static String canonicalName() {

         return IOException.class.getCanonicalName();

     }

     public static String objectName() throws NoSuchMethodException {

         return IOException.class.getMethod("wait").getDeclaringClass().getName();

     }

     public static boolean newInstance() throws Exception {

         IOException ioe = IOException.class.newInstance();

         if (ioe instanceof IOException) {

             return ioe.getClass() == IOException.class;

         }

         throw new IllegalStateException("Not a subtype: " + ioe);

     }

     public static String newInstanceNoPubConstructor() throws Exception {

         try {

             Float f = Float.class.newInstance();

             return "wrong, can't instantiate: " + f;

         } catch (Exception ex) {

             return (ex.getClass().getName() + ":" + ex.getMessage()).toString().toString();

         }

     }

     public static int getMarker() {

         if (!Classes.class.isAnnotationPresent(ClassesMarker.class)) {

             return -2;

         }

         ClassesMarker cm = Classes.class.getAnnotation(ClassesMarker.class);

         return cm == null ? -1 : cm.number();

     }

     public static String getMarkerNicknames() {

         ClassesMarker cm = Classes.class.getAnnotation(ClassesMarker.class);

         if (cm == null) {

             return null;

         }

         StringBuilder sb = new StringBuilder();

         for (String s : cm.nicknames()) {

             sb.append(s).append("\n");

         }

         return sb.toString().toString();

     }

     @Retention(RetentionPolicy.CLASS)

     @interface Ann {

     }

     public static String getRetention() throws Exception {

         Retention r = Ann.class.getAnnotation(Retention.class);

         assert r != null : "Annotation is present";

         assert r.value() == RetentionPolicy.CLASS : "Policy value is OK: " + r.value();

         return r.annotationType().getName();

     }

     public static String getMarkerE() {

         ClassesMarker cm = Classes.class.getAnnotation(ClassesMarker.class);

         if (cm == null) {

             return null;

         }

         return cm.count().name();

     }

     public static String getNamer(boolean direct) {

         if (direct) {

             ClassesNamer cm = Classes.class.getAnnotation(ClassesNamer.class);

             return cm == null ? null : cm.name();

         }

         for (Annotation a : Classes.class.getAnnotations()) {

             if (a instanceof ClassesNamer) {

                 return ((ClassesNamer)a).name();

             }

         }

         return null;

     }

     public static String intType() {

         return Integer.TYPE.getName();

     }

     public static int primitive() {

         return 1;

     }

     public static boolean primitiveB() {

         return true;

     }

     public static String primitiveType(String method) throws Exception {

         return reflectiveMethodCall(false, method).getClass().getName();

     }

     @JavaScriptBody(args = "msg", body = "throw msg;")

     private static native void thrw(String msg);

     public static Object reflectiveMethodCall(boolean direct, String mn) throws Exception {

         Method find = null;

         StringBuilder sb = new StringBuilder();

         if (!direct) {

             final Class<? extends Annotation> v = ClassesMarker.class;

             for (Method m : Classes.class.getMethods()) {

                 sb.append("\n").append(m.getName());

                 if (mn != null) {

                     if (m.getName().equals(mn)) {

                         find = m;

                         break;

                     }

                 } else {

                     if (m.getAnnotation(v) != null) {

                         find = m;

                         break;

                     }

                 }

             }

         } else {

             find = Classes.class.getMethod(mn);

         }

         if (find == null) {

             thrw(sb.toString());

             throw new NullPointerException(sb.toString());

         }

         return find.invoke(null);

     }

     public static int reflectiveSum(int a, int b) throws Exception {

         Method m = StaticMethod.class.getMethod("sum", int.class, int.class);

         return (int) m.invoke(null, a, b);

     }

 }