1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
|
/*
* Copyright (c) 2006, Sun Microsystems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - Neither the name of the Sun Microsystems, Inc. nor the names of
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
package org.apache.tuscany.sca.implementation.script.engines;
import java.io.File;
import java.io.Reader;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import javax.script.AbstractScriptEngine;
import javax.script.Bindings;
import javax.script.Compilable;
import javax.script.CompiledScript;
import javax.script.Invocable;
import javax.script.ScriptContext;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineFactory;
import javax.script.ScriptException;
import javax.script.SimpleBindings;
import org.jruby.Ruby;
import org.jruby.ast.Node;
import org.jruby.internal.runtime.GlobalVariable;
import org.jruby.internal.runtime.GlobalVariables;
import org.jruby.internal.runtime.ReadonlyAccessor;
import org.jruby.javasupport.Java;
import org.jruby.javasupport.JavaObject;
import org.jruby.javasupport.JavaUtil;
import org.jruby.runtime.Block;
import org.jruby.runtime.IAccessor;
import org.jruby.runtime.builtin.IRubyObject;
import com.sun.script.jruby.JRubyScriptEngineFactory;
/*
* This class is a copy of the class com.sun.script.ruby.JRubyScriptEngine with some minor modifications
* to work around problems with Tuscany setting SCA properties and references as global variable in JRuby
* Should only need it temporarily till a new BSF release fixes it.
*/
@SuppressWarnings("unchecked")
public class TuscanyJRubyScriptEngine extends AbstractScriptEngine
implements Compilable, Invocable {
// my factory, may be null
private ScriptEngineFactory factory;
private Ruby runtime;
public TuscanyJRubyScriptEngine() {
init(System.getProperty("com.sun.script.jruby.loadpath"));
}
public TuscanyJRubyScriptEngine(String loadPath) {
init(loadPath);
}
// my implementation for CompiledScript
private class JRubyCompiledScript extends CompiledScript {
// my compiled code
private Node node;
JRubyCompiledScript (Node node) {
this.node = node;
}
public ScriptEngine getEngine() {
return TuscanyJRubyScriptEngine.this;
}
public Object eval(ScriptContext ctx) throws ScriptException {
return evalNode(node, ctx);
}
}
// Compilable methods
public CompiledScript compile(String script)
throws ScriptException {
Node node = compileScript(script, context);
return new JRubyCompiledScript(node);
}
public CompiledScript compile (Reader reader)
throws ScriptException {
Node node = compileScript(reader, context);
return new JRubyCompiledScript(node);
}
// Invocable methods
public Object invokeFunction(String name, Object[] args)
throws ScriptException {
return invokeImpl(null, name, args, Object.class);
}
public Object invokeMethod(Object obj, String name, Object[] args)
throws ScriptException {
if (obj == null) {
throw new IllegalArgumentException("script object is null");
}
return invokeImpl(obj, name, args, Object.class);
}
public Object getInterface(Object obj, Class clazz) {
if (obj == null) {
throw new IllegalArgumentException("script object is null");
}
return makeInterface(obj, clazz);
}
public Object getInterface(Class clazz) {
return makeInterface(null, clazz);
}
private <T> T makeInterface(Object obj, Class<T> clazz) {
if (clazz == null || !clazz.isInterface()) {
throw new IllegalArgumentException("interface Class expected");
}
final Object thiz = obj;
return (T) Proxy.newProxyInstance(
clazz.getClassLoader(),
new Class[] { clazz },
new InvocationHandler() {
public Object invoke(Object proxy, Method m, Object[] args)
throws Throwable {
return invokeImpl(thiz, m.getName(),
args, m.getReturnType());
}
});
}
// ScriptEngine methods
public synchronized Object eval(String str, ScriptContext ctx)
throws ScriptException {
Node node = compileScript(str, ctx);
return evalNode(node, ctx);
}
public synchronized Object eval(Reader reader, ScriptContext ctx)
throws ScriptException {
Node node = compileScript(reader, ctx);
return evalNode(node, ctx);
}
public ScriptEngineFactory getFactory() {
synchronized (this) {
if (factory == null) {
factory = new JRubyScriptEngineFactory();
}
}
return factory;
}
public Bindings createBindings() {
return new SimpleBindings();
}
// package-private methods
void setFactory(ScriptEngineFactory factory) {
this.factory = factory;
}
// internals only below this point
private Object rubyToJava(IRubyObject value) {
return rubyToJava(value, Object.class);
}
private Object rubyToJava(IRubyObject value, Class type) {
return JavaUtil.convertArgument(
Java.ruby_to_java(value, value, Block.NULL_BLOCK),
type);
}
private IRubyObject javaToRuby(Object value) {
if (value instanceof IRubyObject) {
return (IRubyObject) value;
}
IRubyObject result = JavaUtil.convertJavaToRuby(runtime, value);
if (result instanceof JavaObject) {
return runtime.getModule("JavaUtilities").callMethod(runtime.getCurrentContext(), "wrap", result);
}
return result;
}
private synchronized Node compileScript(String script, ScriptContext ctx)
throws ScriptException {
GlobalVariables oldGlobals = runtime.getGlobalVariables();
try {
setGlobalVariables(ctx);
String filename = (String) ctx.getAttribute(ScriptEngine.FILENAME);
if (filename == null) {
filename = "<unknown>";
}
return runtime.parse(script, filename, null, 0);
} catch (Exception exp) {
throw new ScriptException(exp);
} finally {
if (oldGlobals != null) {
//setGlobalVariables(oldGlobals);
}
}
}
private synchronized Node compileScript(Reader reader, ScriptContext ctx)
throws ScriptException {
GlobalVariables oldGlobals = runtime.getGlobalVariables();
try {
setGlobalVariables(ctx);
String filename = (String) ctx.getAttribute(ScriptEngine.FILENAME);
if (filename == null) {
filename = "<unknown>";
}
return runtime.parse(reader, filename, null, 0);
} catch (Exception exp) {
throw new ScriptException(exp);
} finally {
if (oldGlobals != null) {
//setGlobalVariables(oldGlobals);
}
}
}
private void setGlobalVariables(final ScriptContext ctx) {
ctx.setAttribute("context", ctx, ScriptContext.ENGINE_SCOPE);
setGlobalVariables(new GlobalVariables(runtime) {
GlobalVariables parent = runtime.getGlobalVariables();
public void define(String name, IAccessor accessor) {
assert name != null;
assert accessor != null;
assert name.startsWith("$");
synchronized (ctx) {
Bindings engineScope = ctx.getBindings(ScriptContext.ENGINE_SCOPE);
engineScope.put(name, new GlobalVariable(accessor));
}
}
public void defineReadonly(String name, IAccessor accessor) {
assert name != null;
assert accessor != null;
assert name.startsWith("$");
synchronized (ctx) {
Bindings engineScope = ctx.getBindings(ScriptContext.ENGINE_SCOPE);
engineScope.put(name, new GlobalVariable(new
ReadonlyAccessor(name, accessor)));
}
}
public boolean isDefined(String name) {
assert name != null;
assert name.startsWith("$");
synchronized (ctx) {
String modifiedName = name.substring(1);
boolean defined = ctx.getAttributesScope(modifiedName) != -1;
return defined ? true : parent.isDefined(name);
}
}
public void alias(String name, String oldName) {
assert name != null;
assert oldName != null;
assert name.startsWith("$");
assert oldName.startsWith("$");
if (runtime.getSafeLevel() >= 4) {
throw runtime.newSecurityError("Insecure: can't alias global variable");
}
synchronized (ctx) {
int scope = ctx.getAttributesScope(name);
if (scope == -1) {
scope = ScriptContext.ENGINE_SCOPE;
}
IRubyObject value = get(oldName);
ctx.setAttribute(name, rubyToJava(value), scope);
}
}
public IRubyObject get(String name) {
assert name != null;
assert name.startsWith("$");
synchronized (ctx) {
// skip '$' and try
String modifiedName = name.substring(1);
int scope = ctx.getAttributesScope(modifiedName);
if (scope == -1) {
return parent.get(name);
}
Object obj = ctx.getAttribute(modifiedName, scope);
if (obj instanceof IAccessor) {
return ((IAccessor)obj).getValue();
} else {
return javaToRuby(obj);
}
}
}
public IRubyObject set(String name, IRubyObject value) {
assert name != null;
assert name.startsWith("$");
if (runtime.getSafeLevel() >= 4) {
throw runtime.newSecurityError("Insecure: can't change global variable value");
}
synchronized (ctx) {
// skip '$' and try
String modifiedName = name.substring(1);
int scope = ctx.getAttributesScope(modifiedName);
if (scope == -1) {
scope = ScriptContext.ENGINE_SCOPE;
}
IRubyObject oldValue = get(name);
Object obj = ctx.getAttribute(modifiedName, scope);
if (obj instanceof IAccessor) {
((IAccessor)obj).setValue(value);
} else {
ctx.setAttribute(modifiedName, rubyToJava(value), scope);
}
return oldValue;
}
}
public Iterator getNames() {
List list = new ArrayList();
synchronized (ctx) {
Iterator<Integer> iterator = ctx.getScopes().iterator();
int scope;
while (iterator.hasNext()) {
scope = iterator.next().intValue();
Bindings b = ctx.getBindings(scope);
if (b != null) {
Iterator<String> bIterator = b.keySet().iterator();
while (bIterator.hasNext()) {
list.add(bIterator.next());
}
}
}
}
for (Iterator names = parent.getNames(); names.hasNext();) {
list.add(names.next());
}
return Collections.unmodifiableList(list).iterator();
}
});
}
private void setGlobalVariables(GlobalVariables globals) {
runtime.setGlobalVariables(globals);
}
private synchronized Object evalNode(Node node, ScriptContext ctx)
throws ScriptException {
GlobalVariables oldGlobals = runtime.getGlobalVariables();
try {
setGlobalVariables(ctx);
return rubyToJava(runtime.eval(node));
} catch (Exception exp) {
throw new ScriptException(exp);
} finally {
if (oldGlobals != null) {
//setGlobalVariables(oldGlobals);
}
}
}
private void init(String loadPath) {
runtime = Ruby.getDefaultInstance();
if (loadPath == null) {
loadPath = System.getProperty("java.class.path");
}
List list = Arrays.asList(loadPath.split(File.pathSeparator));
runtime.getLoadService().init(list);
runtime.getLoadService().require("java");
}
private Object invokeImpl(final Object obj, String method,
Object[] args, Class returnType)
throws ScriptException {
if (method == null) {
throw new NullPointerException("method name is null");
}
try {
IRubyObject rubyRecv = obj != null ?
JavaUtil.convertJavaToRuby(runtime, obj) : runtime.getTopSelf();
IRubyObject[] rubyArgs = JavaUtil.convertJavaArrayToRuby(runtime, args);
// Create Ruby proxies for any input arguments that are not primitives.
IRubyObject javaUtilities = runtime.getObject().getConstant("JavaUtilities");
for (int i = 0; i < rubyArgs.length; i++) {
IRubyObject tmp = rubyArgs[i];
if (tmp instanceof JavaObject) {
rubyArgs[i] = javaUtilities.callMethod(runtime.getCurrentContext(), "wrap", tmp);
}
}
IRubyObject result = rubyRecv.callMethod(runtime.getCurrentContext(), method, rubyArgs);
return rubyToJava(result, returnType);
} catch (Exception exp) {
throw new ScriptException(exp);
}
}
}
|