Loaded classes need to have their static initializes invoked. Before accessing static field of a class, initializers need to be executed as well.
2 * Back 2 Browser Bytecode Translator
3 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. Look for COPYING file in the top folder.
16 * If not, see http://opensource.org/licenses/GPL-2.0.
18 package org.apidesign.vm4brwsr;
20 import java.io.ByteArrayInputStream;
21 import java.io.IOException;
22 import org.apidesign.bck2brwsr.core.JavaScriptBody;
26 * @author Jaroslav Tulach <jtulach@netbeans.org>
29 private final Object loader;
30 private final Object[] args;
32 private VMLazy(Object loader, Object[] args) {
40 @JavaScriptBody(args={"l", "res", "args" }, body = ""
42 + "\n return args[0](res.toString());"
44 + "\n throw Object.getOwnPropertyNames(l.vm).toString() + x.toString();"
46 private static native byte[] read(Object l, String res, Object[] args);
48 static Object load(Object loader, String name, Object[] arguments)
49 throws IOException, ClassNotFoundException {
50 return new VMLazy(loader, arguments).load(name, false);
53 private Object load(String name, boolean instance)
54 throws IOException, ClassNotFoundException {
55 String res = name.replace('.', '/') + ".class";
56 byte[] arr = read(loader, res, args);
58 throw new ClassNotFoundException(name);
60 // beingDefined(loader, name);
61 StringBuilder out = new StringBuilder();
62 out.append("var loader = arguments[0];\n");
63 out.append("var vm = loader.vm;\n");
64 int prelude = out.length();
65 String initCode = new Gen(this, out).compile(new ByteArrayInputStream(arr));
66 String code = out.toString().toString();
67 // dump("Loading " + name);
69 String under = name.replace('.', '_');
70 Object fn = applyCode(loader, under, code, instance);
72 if (!initCode.isEmpty()) {
73 out.setLength(prelude);
75 code = out.toString().toString();
77 applyCode(loader, null, code, false);
83 // @JavaScriptBody(args = "s", body = "java.lang.System.out.println(s.toString());")
84 static void dump(String s) {
87 /* possibly not needed:
88 @JavaScriptBody(args = {"loader", "n" }, body =
89 "var cls = n.replace__Ljava_lang_String_2CC(n, '.','_').toString();" +
90 "loader.vm[cls] = true;\n"
92 private static native void beingDefined(Object loader, String name);
96 @JavaScriptBody(args = {"loader", "name", "script", "instance" }, body =
98 " new Function(script)(loader, name);\n" +
100 " throw 'Cannot compile ' + ex + ' line: ' + ex.lineNumber + ' script:\\n' + script;\n" +
102 "return name != null ? vm[name](instance) : null;\n"
104 private static native Object applyCode(Object loader, String name, String script, boolean instance);
107 private static final class Gen extends ByteCodeToJavaScript {
108 private final VMLazy lazy;
110 public Gen(VMLazy vm, Appendable out) {
115 @JavaScriptBody(args = {"self", "n"},
117 "var cls = n.replace__Ljava_lang_String_2CC(n, '/','_').toString();"
118 + "\nvar dot = n.replace__Ljava_lang_String_2CC(n,'/','.').toString();"
119 + "\nvar lazy = self.fld_lazy;"
120 + "\nvar loader = lazy.fld_loader;"
121 + "\nvar vm = loader.vm;"
122 + "\nif (vm[cls]) return false;"
123 + "\nvm[cls] = function() {"
124 + "\n var instance = arguments.length == 0 || arguments[0] === true;"
125 + "\n return lazy.load__Ljava_lang_Object_2Ljava_lang_String_2Z(lazy, dot, instance);"
129 protected boolean requireReference(String internalClassName) {
130 throw new UnsupportedOperationException();
134 protected void requireScript(String resourcePath) {
138 String assignClass(String className) {
139 return "vm[arguments[1]]=";
143 String accessClass(String classOperation) {
144 return "vm." + classOperation;