1.1 --- a/vm/src/main/java/org/apidesign/vm4brwsr/VMLazy.java Tue Feb 26 14:55:55 2013 +0100
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,155 +0,0 @@
1.4 -/**
1.5 - * Back 2 Browser Bytecode Translator
1.6 - * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
1.7 - *
1.8 - * This program is free software: you can redistribute it and/or modify
1.9 - * it under the terms of the GNU General Public License as published by
1.10 - * the Free Software Foundation, version 2 of the License.
1.11 - *
1.12 - * This program is distributed in the hope that it will be useful,
1.13 - * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.14 - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.15 - * GNU General Public License for more details.
1.16 - *
1.17 - * You should have received a copy of the GNU General Public License
1.18 - * along with this program. Look for COPYING file in the top folder.
1.19 - * If not, see http://opensource.org/licenses/GPL-2.0.
1.20 - */
1.21 -package org.apidesign.vm4brwsr;
1.22 -
1.23 -import java.io.ByteArrayInputStream;
1.24 -import java.io.IOException;
1.25 -import java.io.InputStream;
1.26 -import java.lang.reflect.Array;
1.27 -import org.apidesign.bck2brwsr.core.JavaScriptBody;
1.28 -
1.29 -/**
1.30 - *
1.31 - * @author Jaroslav Tulach <jtulach@netbeans.org>
1.32 - */
1.33 -final class VMLazy {
1.34 - private final Object loader;
1.35 - private final Object[] args;
1.36 -
1.37 - private VMLazy(Object loader, Object[] args) {
1.38 - this.loader = loader;
1.39 - this.args = args;
1.40 - }
1.41 -
1.42 - static void init() {
1.43 - }
1.44 -
1.45 - static Object load(Object loader, String name, Object[] arguments)
1.46 - throws IOException, ClassNotFoundException {
1.47 - return new VMLazy(loader, arguments).load(name, false);
1.48 - }
1.49 -
1.50 - static byte[] loadBytes(Object loader, String name, Object[] arguments) throws Exception {
1.51 - return Zips.loadFromCp(arguments, name);
1.52 - }
1.53 -
1.54 - private Object load(String name, boolean instance)
1.55 - throws IOException, ClassNotFoundException {
1.56 - String res = name.replace('.', '/') + ".class";
1.57 - byte[] arr = Zips.loadFromCp(args, res);
1.58 - if (arr == null) {
1.59 - throw new ClassNotFoundException(name);
1.60 - }
1.61 -// beingDefined(loader, name);
1.62 - StringBuilder out = new StringBuilder();
1.63 - out.append("var loader = arguments[0];\n");
1.64 - out.append("var vm = loader.vm;\n");
1.65 - int prelude = out.length();
1.66 - String initCode = new Gen(this, out).compile(new ByteArrayInputStream(arr));
1.67 - String code = out.toString().toString();
1.68 -// dump("Loading " + name);
1.69 - dump(code);
1.70 - String under = name.replace('.', '_');
1.71 - Object fn = applyCode(loader, under, code, instance);
1.72 -
1.73 - if (!initCode.isEmpty()) {
1.74 - out.setLength(prelude);
1.75 - out.append(initCode);
1.76 - code = out.toString().toString();
1.77 - dump(code);
1.78 - applyCode(loader, null, code, false);
1.79 - }
1.80 -
1.81 - return fn;
1.82 - }
1.83 -
1.84 -// @JavaScriptBody(args = "s", body = "java.lang.System.out.println(s.toString());")
1.85 - static void dump(String s) {
1.86 - }
1.87 -
1.88 -/* possibly not needed:
1.89 - @JavaScriptBody(args = {"loader", "n" }, body =
1.90 - "var cls = n.replace__Ljava_lang_String_2CC(n, '.','_').toString();" +
1.91 - "loader.vm[cls] = true;\n"
1.92 - )
1.93 - private static native void beingDefined(Object loader, String name);
1.94 -*/
1.95 -
1.96 -
1.97 - @JavaScriptBody(args = {"loader", "name", "script", "instance" }, body =
1.98 - "try {\n" +
1.99 - " new Function(script)(loader, name);\n" +
1.100 - "} catch (ex) {\n" +
1.101 - " throw 'Cannot compile ' + name + ' ' + ex + ' line: ' + ex.lineNumber + ' script:\\n' + script;\n" +
1.102 - "}\n" +
1.103 - "return name != null ? vm[name](instance) : null;\n"
1.104 - )
1.105 - private static native Object applyCode(Object loader, String name, String script, boolean instance);
1.106 -
1.107 -
1.108 - private static final class Gen extends ByteCodeToJavaScript {
1.109 - private final VMLazy lazy;
1.110 -
1.111 - public Gen(VMLazy vm, Appendable out) {
1.112 - super(out);
1.113 - this.lazy = vm;
1.114 - }
1.115 -
1.116 - @JavaScriptBody(args = {"n"},
1.117 - body =
1.118 - "var cls = n.replace__Ljava_lang_String_2CC('/','_').toString();"
1.119 - + "\nvar dot = n.replace__Ljava_lang_String_2CC('/','.').toString();"
1.120 - + "\nvar lazy = this._lazy();"
1.121 - + "\nvar loader = lazy._loader();"
1.122 - + "\nvar vm = loader.vm;"
1.123 - + "\nif (vm[cls]) return false;"
1.124 - + "\nvm[cls] = function() {"
1.125 - + "\n var instance = arguments.length == 0 || arguments[0] === true;"
1.126 - + "\n return lazy.load__Ljava_lang_Object_2Ljava_lang_String_2Z(dot, instance);"
1.127 - + "\n};"
1.128 - + "\nreturn true;")
1.129 - @Override
1.130 - protected boolean requireReference(String internalClassName) {
1.131 - throw new UnsupportedOperationException();
1.132 - }
1.133 -
1.134 - @Override
1.135 - protected void requireScript(String resourcePath) throws IOException {
1.136 - InputStream is = getClass().getResourceAsStream(resourcePath);
1.137 - StringBuilder sb = new StringBuilder();
1.138 - for (;;) {
1.139 - int ch = is.read();
1.140 - if (ch == -1) {
1.141 - break;
1.142 - }
1.143 - sb.append((char)ch);
1.144 - }
1.145 - applyCode(lazy.loader, null, sb.toString(), false);
1.146 - }
1.147 -
1.148 - @Override
1.149 - String assignClass(String className) {
1.150 - return "vm[arguments[1]]=";
1.151 - }
1.152 -
1.153 - @Override
1.154 - String accessClass(String classOperation) {
1.155 - return "vm." + classOperation;
1.156 - }
1.157 - }
1.158 -}