jaroslav@378: /**
jaroslav@378:  * Back 2 Browser Bytecode Translator
jaroslav@378:  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jaroslav@378:  *
jaroslav@378:  * This program is free software: you can redistribute it and/or modify
jaroslav@378:  * it under the terms of the GNU General Public License as published by
jaroslav@378:  * the Free Software Foundation, version 2 of the License.
jaroslav@378:  *
jaroslav@378:  * This program is distributed in the hope that it will be useful,
jaroslav@378:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
jaroslav@378:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
jaroslav@378:  * GNU General Public License for more details.
jaroslav@378:  *
jaroslav@378:  * You should have received a copy of the GNU General Public License
jaroslav@378:  * along with this program. Look for COPYING file in the top folder.
jaroslav@378:  * If not, see http://opensource.org/licenses/GPL-2.0.
jaroslav@235:  */
jaroslav@555: package org.apidesign.bck2brwsr.emul.reflect;
jaroslav@235: 
jaroslav@235: import java.lang.annotation.Annotation;
jaroslav@652: import java.lang.reflect.Method;
jaroslav@652: import java.lang.reflect.Modifier;
jaroslav@235: import org.apidesign.bck2brwsr.core.JavaScriptBody;
jaroslav@235: 
jaroslav@235: /**
jaroslav@235:  *
jaroslav@235:  * @author Jaroslav Tulach <jtulach@netbeans.org>
jaroslav@235:  */
jaroslav@266: public final class AnnotationImpl implements Annotation {
jaroslav@654:     private final Class<? extends Annotation> type;
jaroslav@654: 
jaroslav@654:     public AnnotationImpl(Class<? extends Annotation> type) {
jaroslav@654:         this.type = type;
jaroslav@654:     }
jaroslav@654:     
jaroslav@235:     public Class<? extends Annotation> annotationType() {
jaroslav@654:         return type;
jaroslav@235:     }
jaroslav@235: 
jaroslav@652:     @JavaScriptBody(args = { "a", "n", "arr", "values" }, body = ""
jaroslav@253:         + "function f(v, p) {\n"
jaroslav@253:         + "  var val = v;\n"
jaroslav@253:         + "  var prop = p;\n"
jaroslav@253:         + "  return function() {\n"
jaroslav@253:         + "    return val[prop];\n"
jaroslav@253:         + "  };\n"
jaroslav@253:         + "}\n"
jaroslav@652:         + "for (var i = 0; i < arr.length; i += 2) {\n"
jaroslav@652:         + "  var m = arr[i];\n"
jaroslav@652:         + "  var p = arr[i + 1];\n"
jaroslav@652:         + "  a[m] = new f(values, p);\n"
jaroslav@253:         + "}\n"
jaroslav@253:         + "a['$instOf_' + n] = true;\n"
jaroslav@235:         + "return a;"
jaroslav@235:     )
jaroslav@652:     private static native <T extends Annotation> T create(
jaroslav@652:         AnnotationImpl a, String n, String[] methodsAndProps, Object values
jaroslav@652:     );
jaroslav@652:     
jaroslav@266:     public static <T extends Annotation> T create(Class<T> annoClass, Object values) {
jaroslav@654:         return create(new AnnotationImpl(annoClass), 
jaroslav@652:             annoClass.getName().replace('.', '_'), 
jaroslav@652:             findProps(annoClass), values
jaroslav@652:         );
jaroslav@235:     }
jaroslav@238: 
jaroslav@266:     public static Annotation[] create(Object anno) {
jaroslav@238:         String[] names = findNames(anno);
jaroslav@238:         Annotation[] ret = new Annotation[names.length];
jaroslav@238:         for (int i = 0; i < names.length; i++) {
jaroslav@652:             String annoNameSlash = names[i].substring(1, names[i].length() - 1);
jaroslav@654:             Class<? extends Annotation> annoClass;
jaroslav@652:             try {
jaroslav@654:                 annoClass = (Class<? extends Annotation>)Class.forName(annoNameSlash.replace('/', '.'));
jaroslav@652:             } catch (ClassNotFoundException ex) {
jaroslav@652:                 throw new IllegalStateException("Can't find annotation class " + annoNameSlash);
jaroslav@652:             }
jaroslav@652:             ret[i] = create(
jaroslav@654:                 new AnnotationImpl(annoClass), 
jaroslav@652:                 annoNameSlash.replace('/', '_'),
jaroslav@652:                 findProps(annoClass),
jaroslav@652:                 findData(anno, names[i])
jaroslav@652:             );
jaroslav@238:         }
jaroslav@238:         return ret;
jaroslav@238:     }
jaroslav@238:     @JavaScriptBody(args = "anno", body =
jaroslav@238:           "var arr = new Array();"
jaroslav@254:         + "var props = Object.getOwnPropertyNames(anno);\n"
jaroslav@254:         + "for (var i = 0; i < props.length; i++) {\n"
jaroslav@254:         + "  var p = props[i];\n"
jaroslav@238:         + "  arr.push(p);"
jaroslav@238:         + "}"
jaroslav@238:         + "return arr;"
jaroslav@238:     )
jaroslav@652:     private static native String[] findNames(Object anno);
jaroslav@238: 
jaroslav@238:     @JavaScriptBody(args={ "anno", "p"}, body="return anno[p];")
jaroslav@652:     private static native Object findData(Object anno, String p);
jaroslav@652: 
jaroslav@652:     private static String[] findProps(Class<?> annoClass) {
jaroslav@652:         final Method[] marr = MethodImpl.findMethods(annoClass, Modifier.PUBLIC);
jaroslav@652:         String[] arr = new String[marr.length * 2];
jaroslav@652:         int pos = 0;
jaroslav@652:         for (Method m : marr) {
jaroslav@652:             arr[pos++] = MethodImpl.toSignature(m);
jaroslav@652:             arr[pos++] = m.getName();
jaroslav@652:         }
jaroslav@652:         return arr;
jaroslav@238:     }
jaroslav@235: }