jaroslav@29
|
1 |
package org.apidesign.vm4brwsr;
|
jaroslav@29
|
2 |
|
jaroslav@29
|
3 |
import java.io.BufferedWriter;
|
jaroslav@29
|
4 |
import java.io.FileWriter;
|
jaroslav@29
|
5 |
import java.io.IOException;
|
jaroslav@29
|
6 |
import java.io.InputStream;
|
jaroslav@29
|
7 |
import java.io.Writer;
|
jaroslav@93
|
8 |
import java.net.URL;
|
jaroslav@29
|
9 |
import java.util.Arrays;
|
jaroslav@97
|
10 |
import java.util.Collections;
|
jaroslav@93
|
11 |
import java.util.Enumeration;
|
jaroslav@97
|
12 |
import java.util.HashMap;
|
jaroslav@97
|
13 |
import java.util.Iterator;
|
jaroslav@29
|
14 |
import java.util.LinkedList;
|
jaroslav@29
|
15 |
import java.util.List;
|
jaroslav@97
|
16 |
import java.util.Map;
|
jaroslav@29
|
17 |
|
jaroslav@29
|
18 |
/** Generator of JavaScript from bytecode of classes on classpath of the VM.
|
jaroslav@29
|
19 |
*
|
jaroslav@29
|
20 |
* @author Jaroslav Tulach <jtulach@netbeans.org>
|
jaroslav@29
|
21 |
*/
|
jaroslav@29
|
22 |
final class GenJS {
|
jaroslav@29
|
23 |
private GenJS() {}
|
jaroslav@29
|
24 |
|
jaroslav@29
|
25 |
public static void main(String... args) throws IOException {
|
jaroslav@29
|
26 |
if (args.length < 2) {
|
jaroslav@29
|
27 |
System.err.println("Usage: java -cp ... -jar ... <file_to_generate_js_code_to> java/lang/Class org/your/App ...");
|
jaroslav@29
|
28 |
return;
|
jaroslav@29
|
29 |
}
|
jaroslav@29
|
30 |
|
jaroslav@29
|
31 |
Writer w = new BufferedWriter(new FileWriter(args[0]));
|
jaroslav@29
|
32 |
List<String> classes = Arrays.asList(args).subList(1, args.length);
|
jaroslav@29
|
33 |
compile(w, classes);
|
jaroslav@29
|
34 |
w.close();
|
jaroslav@29
|
35 |
}
|
jaroslav@29
|
36 |
|
jaroslav@29
|
37 |
static void compile(Appendable out, String... names) throws IOException {
|
jaroslav@29
|
38 |
compile(out, Arrays.asList(names));
|
jaroslav@29
|
39 |
}
|
jaroslav@29
|
40 |
static void compile(Appendable out, List<String> names) throws IOException {
|
jaroslav@97
|
41 |
for (String baseClass : names) {
|
jaroslav@97
|
42 |
Map<String,String> processed = new HashMap<String, String>();
|
jaroslav@97
|
43 |
LinkedList<String> toProcess = new LinkedList<String>();
|
jaroslav@97
|
44 |
toProcess.add(baseClass);
|
jaroslav@97
|
45 |
for (;;) {
|
jaroslav@97
|
46 |
String name = null;
|
jaroslav@97
|
47 |
Iterator<String> it = toProcess.iterator();
|
jaroslav@97
|
48 |
while (it.hasNext() && name == null) {
|
jaroslav@97
|
49 |
String n = it.next();
|
jaroslav@97
|
50 |
if (processed.get(n) != null) {
|
jaroslav@97
|
51 |
continue;
|
jaroslav@97
|
52 |
}
|
jaroslav@97
|
53 |
name = n;
|
jaroslav@97
|
54 |
}
|
jaroslav@97
|
55 |
if (name == null) {
|
jaroslav@97
|
56 |
break;
|
jaroslav@97
|
57 |
}
|
jaroslav@97
|
58 |
if (name.startsWith("java/")
|
jaroslav@97
|
59 |
&& !name.equals("java/lang/Object")
|
jaroslav@97
|
60 |
&& !name.equals("java/lang/Class")
|
jaroslav@104
|
61 |
&& !name.equals("java/lang/Math")
|
jaroslav@97
|
62 |
&& !name.equals("java/lang/Number")
|
jaroslav@97
|
63 |
&& !name.equals("java/lang/Integer")
|
jaroslav@104
|
64 |
&& !name.equals("java/lang/Float")
|
jaroslav@104
|
65 |
&& !name.equals("java/lang/Double")
|
jaroslav@97
|
66 |
&& !name.equals("java/lang/Throwable")
|
jaroslav@97
|
67 |
&& !name.equals("java/lang/Exception")
|
jaroslav@97
|
68 |
&& !name.equals("java/lang/RuntimeException")
|
jaroslav@97
|
69 |
&& !name.equals("java/lang/UnsupportedOperationException")
|
jaroslav@97
|
70 |
&& !name.equals("java/lang/String")
|
jaroslav@97
|
71 |
&& !name.equals("java/lang/String$CaseInsensitiveComparator")
|
jaroslav@97
|
72 |
&& !name.equals("java/lang/StringBuilder")
|
jaroslav@97
|
73 |
&& !name.equals("java/lang/AbstractStringBuilder")
|
jaroslav@97
|
74 |
) {
|
jaroslav@97
|
75 |
processed.put(name, "");
|
jaroslav@97
|
76 |
continue;
|
jaroslav@97
|
77 |
}
|
jaroslav@97
|
78 |
InputStream is = loadClass(name);
|
jaroslav@97
|
79 |
if (is == null) {
|
jaroslav@97
|
80 |
throw new IOException("Can't find class " + name);
|
jaroslav@97
|
81 |
}
|
jaroslav@97
|
82 |
LinkedList<String> scripts = new LinkedList<String>();
|
jaroslav@97
|
83 |
try {
|
jaroslav@97
|
84 |
String initCode = ByteCodeToJavaScript.compile(is, out, toProcess, scripts);
|
jaroslav@97
|
85 |
processed.put(name, initCode == null ? "" : initCode);
|
jaroslav@97
|
86 |
} catch (RuntimeException ex) {
|
jaroslav@97
|
87 |
if (out instanceof CharSequence) {
|
jaroslav@97
|
88 |
CharSequence seq = (CharSequence)out;
|
jaroslav@97
|
89 |
int lastBlock = seq.length();
|
jaroslav@97
|
90 |
while (lastBlock-- >= 0) {
|
jaroslav@97
|
91 |
if (seq.charAt(lastBlock) == '{') {
|
jaroslav@97
|
92 |
break;
|
jaroslav@97
|
93 |
}
|
jaroslav@29
|
94 |
}
|
jaroslav@97
|
95 |
throw new IOException("Error while compiling " + name + "\n"
|
jaroslav@97
|
96 |
+ seq.subSequence(lastBlock + 1, seq.length()), ex
|
jaroslav@97
|
97 |
);
|
jaroslav@97
|
98 |
} else {
|
jaroslav@97
|
99 |
throw new IOException("Error while compiling " + name + "\n"
|
jaroslav@97
|
100 |
+ out, ex
|
jaroslav@97
|
101 |
);
|
jaroslav@29
|
102 |
}
|
jaroslav@97
|
103 |
}
|
jaroslav@97
|
104 |
for (String resource : scripts) {
|
jaroslav@97
|
105 |
InputStream emul = GenJS.class.getResourceAsStream(resource);
|
jaroslav@97
|
106 |
if (emul == null) {
|
jaroslav@97
|
107 |
throw new IOException("Can't find " + resource);
|
jaroslav@97
|
108 |
}
|
jaroslav@97
|
109 |
readResource(emul, out);
|
jaroslav@29
|
110 |
}
|
jaroslav@29
|
111 |
}
|
jaroslav@97
|
112 |
|
jaroslav@97
|
113 |
Collections.reverse(toProcess);
|
jaroslav@97
|
114 |
|
jaroslav@97
|
115 |
for (String clazz : toProcess) {
|
jaroslav@97
|
116 |
String initCode = processed.remove(clazz);
|
jaroslav@97
|
117 |
if (initCode != null) {
|
jaroslav@97
|
118 |
out.append(initCode).append("\n");
|
jaroslav@91
|
119 |
}
|
jaroslav@91
|
120 |
}
|
jaroslav@29
|
121 |
}
|
jaroslav@29
|
122 |
}
|
jaroslav@90
|
123 |
private static void readResource(InputStream emul, Appendable out) throws IOException {
|
jaroslav@90
|
124 |
try {
|
jaroslav@90
|
125 |
int state = 0;
|
jaroslav@90
|
126 |
for (;;) {
|
jaroslav@90
|
127 |
int ch = emul.read();
|
jaroslav@90
|
128 |
if (ch == -1) {
|
jaroslav@90
|
129 |
break;
|
jaroslav@90
|
130 |
}
|
jaroslav@90
|
131 |
if (ch < 0 || ch > 255) {
|
jaroslav@90
|
132 |
throw new IOException("Invalid char in emulation " + ch);
|
jaroslav@90
|
133 |
}
|
jaroslav@90
|
134 |
switch (state) {
|
jaroslav@90
|
135 |
case 0:
|
jaroslav@90
|
136 |
if (ch == '/') {
|
jaroslav@90
|
137 |
state = 1;
|
jaroslav@90
|
138 |
} else {
|
jaroslav@90
|
139 |
out.append((char)ch);
|
jaroslav@90
|
140 |
}
|
jaroslav@90
|
141 |
break;
|
jaroslav@90
|
142 |
case 1:
|
jaroslav@90
|
143 |
if (ch == '*') {
|
jaroslav@90
|
144 |
state = 2;
|
jaroslav@90
|
145 |
} else {
|
jaroslav@90
|
146 |
out.append('/').append((char)ch);
|
jaroslav@90
|
147 |
state = 0;
|
jaroslav@90
|
148 |
}
|
jaroslav@90
|
149 |
break;
|
jaroslav@90
|
150 |
case 2:
|
jaroslav@90
|
151 |
if (ch == '*') {
|
jaroslav@90
|
152 |
state = 3;
|
jaroslav@90
|
153 |
}
|
jaroslav@90
|
154 |
break;
|
jaroslav@90
|
155 |
case 3:
|
jaroslav@90
|
156 |
if (ch == '/') {
|
jaroslav@90
|
157 |
state = 0;
|
jaroslav@90
|
158 |
} else {
|
jaroslav@90
|
159 |
state = 2;
|
jaroslav@90
|
160 |
}
|
jaroslav@90
|
161 |
break;
|
jaroslav@90
|
162 |
}
|
jaroslav@90
|
163 |
}
|
jaroslav@90
|
164 |
} finally {
|
jaroslav@90
|
165 |
emul.close();
|
jaroslav@90
|
166 |
}
|
jaroslav@90
|
167 |
}
|
jaroslav@93
|
168 |
|
jaroslav@93
|
169 |
private static InputStream loadClass(String name) throws IOException {
|
jaroslav@93
|
170 |
Enumeration<URL> en = ClassLoader.getSystemClassLoader().getResources(name + ".class");
|
jaroslav@93
|
171 |
URL u = null;
|
jaroslav@93
|
172 |
while (en.hasMoreElements()) {
|
jaroslav@93
|
173 |
u = en.nextElement();
|
jaroslav@93
|
174 |
}
|
jaroslav@93
|
175 |
if (u == null) {
|
jaroslav@93
|
176 |
throw new IOException("Can't find " + name);
|
jaroslav@93
|
177 |
}
|
jaroslav@93
|
178 |
return u.openStream();
|
jaroslav@93
|
179 |
}
|
jaroslav@29
|
180 |
|
jaroslav@29
|
181 |
}
|