1 /*
2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.lang.invoke;
27
28 import jdk.internal.org.objectweb.asm.*;
29 import sun.invoke.util.BytecodeDescriptor;
30 import jdk.internal.misc.Unsafe;
31 import sun.security.action.GetPropertyAction;
32
33 import java.io.FilePermission;
34 import java.io.Serializable;
35 import java.lang.reflect.Constructor;
36 import java.security.AccessController;
37 import java.security.PrivilegedAction;
38 import java.util.LinkedHashSet;
39 import java.util.concurrent.atomic.AtomicInteger;
40 import java.util.PropertyPermission;
41 import java.util.Set;
42
43 import static jdk.internal.org.objectweb.asm.Opcodes.*;
44
45 /**
46 * Lambda metafactory implementation which dynamically creates an
47 * inner-class-like class per lambda callsite.
48 *
49 * @see LambdaMetafactory
50 */
51 /* package */ final class InnerClassLambdaMetafactory extends AbstractValidatingLambdaMetafactory {
52 private static final Unsafe UNSAFE = Unsafe.getUnsafe();
53
54 private static final int CLASSFILE_VERSION = 52;
55 private static final String METHOD_DESCRIPTOR_VOID = Type.getMethodDescriptor(Type.VOID_TYPE);
56 private static final String JAVA_LANG_OBJECT = "java/lang/Object";
57 private static final String NAME_CTOR = "<init>";
58 private static final String NAME_FACTORY = "get$Lambda";
59
60 //Serialization support
61 private static final String NAME_SERIALIZED_LAMBDA = "java/lang/invoke/SerializedLambda";
62 private static final String NAME_NOT_SERIALIZABLE_EXCEPTION = "java/io/NotSerializableException";
63 private static final String DESCR_METHOD_WRITE_REPLACE = "()Ljava/lang/Object;";
64 private static final String DESCR_METHOD_WRITE_OBJECT = "(Ljava/io/ObjectOutputStream;)V";
65 private static final String DESCR_METHOD_READ_OBJECT = "(Ljava/io/ObjectInputStream;)V";
66 private static final String NAME_METHOD_WRITE_REPLACE = "writeReplace";
67 private static final String NAME_METHOD_READ_OBJECT = "readObject";
68 private static final String NAME_METHOD_WRITE_OBJECT = "writeObject";
69
70 private static final String DESCR_CLASS = "Ljava/lang/Class;";
71 private static final String DESCR_STRING = "Ljava/lang/String;";
72 private static final String DESCR_OBJECT = "Ljava/lang/Object;";
73 private static final String DESCR_CTOR_SERIALIZED_LAMBDA
74 = "(" + DESCR_CLASS + DESCR_STRING + DESCR_STRING + DESCR_STRING + "I"
75 + DESCR_STRING + DESCR_STRING + DESCR_STRING + DESCR_STRING + "[" + DESCR_OBJECT + ")V";
76
77 private static final String DESCR_CTOR_NOT_SERIALIZABLE_EXCEPTION = "(Ljava/lang/String;)V";
78 private static final String[] SER_HOSTILE_EXCEPTIONS = new String[] {NAME_NOT_SERIALIZABLE_EXCEPTION};
79
80
81 private static final String[] EMPTY_STRING_ARRAY = new String[0];
82
83 // Used to ensure that each spun class name is unique
84 private static final AtomicInteger counter = new AtomicInteger(0);
85
86 // For dumping generated classes to disk, for debugging purposes
87 private static final ProxyClassesDumper dumper;
88
89 static {
90 final String key = "jdk.internal.lambda.dumpProxyClasses";
91 String path = GetPropertyAction.getProperty(key);
92 dumper = (null == path) ? null : ProxyClassesDumper.getInstance(path);
93 }
94
95 // See context values in AbstractValidatingLambdaMetafactory
96 private final String implMethodClassName; // Name of type containing implementation "CC"
97 private final String implMethodName; // Name of implementation method "impl"
98 private final String implMethodDesc; // Type descriptor for implementation methods "(I)Ljava/lang/String;"
99 private final Class<?> implMethodReturnClass; // class for implementation method return type "Ljava/lang/String;"
100 private final MethodType constructorType; // Generated class constructor type "(CC)void"
101 private final ClassWriter cw; // ASM class writer
102 private final String[] argNames; // Generated names for the constructor arguments
103 private final String[] argDescs; // Type descriptors for the constructor arguments
104 private final String lambdaClassName; // Generated name for the generated class "X$$Lambda$1"
105
106 /**
107 * General meta-factory constructor, supporting both standard cases and
108 * allowing for uncommon options such as serialization or bridging.
109 *
110 * @param caller Stacked automatically by VM; represents a lookup context
111 * with the accessibility privileges of the caller.
112 * @param invokedType Stacked automatically by VM; the signature of the
113 * invoked method, which includes the expected static
114 * type of the returned lambda object, and the static
115 * types of the captured arguments for the lambda. In
116 * the event that the implementation method is an
117 * instance method, the first argument in the invocation
118 * signature will correspond to the receiver.
119 * @param samMethodName Name of the method in the functional interface to
120 * which the lambda or method reference is being
121 * converted, represented as a String.
122 * @param samMethodType Type of the method in the functional interface to
123 * which the lambda or method reference is being
124 * converted, represented as a MethodType.
125 * @param implMethod The implementation method which should be called (with
126 * suitable adaptation of argument types, return types,
127 * and adjustment for captured arguments) when methods of
128 * the resulting functional interface instance are invoked.
129 * @param instantiatedMethodType The signature of the primary functional
130 * interface method after type variables are
131 * substituted with their instantiation from
132 * the capture site
133 * @param isSerializable Should the lambda be made serializable? If set,
134 * either the target type or one of the additional SAM
135 * types must extend {@code Serializable}.
136 * @param markerInterfaces Additional interfaces which the lambda object
137 * should implement.
138 * @param additionalBridges Method types for additional signatures to be
139 * bridged to the implementation method
140 * @throws LambdaConversionException If any of the meta-factory protocol
141 * invariants are violated
142 */
143 public InnerClassLambdaMetafactory(MethodHandles.Lookup caller,
144 MethodType invokedType,
145 String samMethodName,
146 MethodType samMethodType,
147 MethodHandle implMethod,
148 MethodType instantiatedMethodType,
149 boolean isSerializable,
150 Class<?>[] markerInterfaces,
151 MethodType[] additionalBridges)
152 throws LambdaConversionException {
153 super(caller, invokedType, samMethodName, samMethodType,
154 implMethod, instantiatedMethodType,
155 isSerializable, markerInterfaces, additionalBridges);
156 implMethodClassName = implDefiningClass.getName().replace('.', '/');
157 implMethodName = implInfo.getName();
158 implMethodDesc = implMethodType.toMethodDescriptorString();
159 implMethodReturnClass = (implKind == MethodHandleInfo.REF_newInvokeSpecial)
160 ? implDefiningClass
161 : implMethodType.returnType();
162 constructorType = invokedType.changeReturnType(Void.TYPE);
163 lambdaClassName = targetClass.getName().replace('.', '/') + "$$Lambda$" + counter.incrementAndGet();
164 cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
165 int parameterCount = invokedType.parameterCount();
166 if (parameterCount > 0) {
167 argNames = new String[parameterCount];
168 argDescs = new String[parameterCount];
169 for (int i = 0; i < parameterCount; i++) {
170 argNames[i] = "arg$" + (i + 1);
171 argDescs[i] = BytecodeDescriptor.unparse(invokedType.parameterType(i));
172 }
173 } else {
174 argNames = argDescs = EMPTY_STRING_ARRAY;
175 }
176 }
177
178 /**
179 * Build the CallSite. Generate a class file which implements the functional
180 * interface, define the class, if there are no parameters create an instance
181 * of the class which the CallSite will return, otherwise, generate handles
182 * which will call the class' constructor.
183 *
184 * @return a CallSite, which, when invoked, will return an instance of the
185 * functional interface
186 * @throws ReflectiveOperationException
187 * @throws LambdaConversionException If properly formed functional interface
188 * is not found
189 */
190 @Override
191 CallSite buildCallSite() throws LambdaConversionException {
192 final Class<?> innerClass = spinInnerClass();
193 if (invokedType.parameterCount() == 0) {
194 final Constructor<?>[] ctrs = AccessController.doPrivileged(
195 new PrivilegedAction<>() {
196 @Override
197 public Constructor<?>[] run() {
198 Constructor<?>[] ctrs = innerClass.getDeclaredConstructors();
199 if (ctrs.length == 1) {
200 // The lambda implementing inner class constructor is private, set
201 // it accessible (by us) before creating the constant sole instance
202 ctrs[0].setAccessible(true);
203 }
204 return ctrs;
205 }
206 });
207 if (ctrs.length != 1) {
208 throw new LambdaConversionException("Expected one lambda constructor for "
209 + innerClass.getCanonicalName() + ", got " + ctrs.length);
210 }
211
212 try {
213 Object inst = ctrs[0].newInstance();
214 return new ConstantCallSite(MethodHandles.constant(samBase, inst));
215 }
216 catch (ReflectiveOperationException e) {
217 throw new LambdaConversionException("Exception instantiating lambda object", e);
218 }
219 } else {
220 try {
221 UNSAFE.ensureClassInitialized(innerClass);
222 return new ConstantCallSite(
223 MethodHandles.Lookup.IMPL_LOOKUP
224 .findStatic(innerClass, NAME_FACTORY, invokedType));
225 }
226 catch (ReflectiveOperationException e) {
227 throw new LambdaConversionException("Exception finding constructor", e);
228 }
229 }
230 }
231
232 /**
233 * Generate a class file which implements the functional
234 * interface, define and return the class.
235 *
236 * @implNote The class that is generated does not include signature
237 * information for exceptions that may be present on the SAM method.
238 * This is to reduce classfile size, and is harmless as checked exceptions
239 * are erased anyway, no one will ever compile against this classfile,
240 * and we make no guarantees about the reflective properties of lambda
241 * objects.
242 *
243 * @return a Class which implements the functional interface
244 * @throws LambdaConversionException If properly formed functional interface
245 * is not found
246 */
247 private Class<?> spinInnerClass() throws LambdaConversionException {
248 String[] interfaces;
249 String samIntf = samBase.getName().replace('.', '/');
250 boolean accidentallySerializable = !isSerializable && Serializable.class.isAssignableFrom(samBase);
251 if (markerInterfaces.length == 0) {
252 interfaces = new String[]{samIntf};
253 } else {
254 // Assure no duplicate interfaces (ClassFormatError)
255 Set<String> itfs = new LinkedHashSet<>(markerInterfaces.length + 1);
256 itfs.add(samIntf);
257 for (Class<?> markerInterface : markerInterfaces) {
258 itfs.add(markerInterface.getName().replace('.', '/'));
259 accidentallySerializable |= !isSerializable && Serializable.class.isAssignableFrom(markerInterface);
260 }
261 interfaces = itfs.toArray(new String[itfs.size()]);
262 }
263
264 cw.visit(CLASSFILE_VERSION, ACC_SUPER + ACC_FINAL + ACC_SYNTHETIC,
265 lambdaClassName, null,
266 JAVA_LANG_OBJECT, interfaces);
267
268 // Generate final fields to be filled in by constructor
269 for (int i = 0; i < argDescs.length; i++) {
270 FieldVisitor fv = cw.visitField(ACC_PRIVATE + ACC_FINAL,
271 argNames[i],
272 argDescs[i],
273 null, null);
274 fv.visitEnd();
275 }
276
277 generateConstructor();
278
279 if (invokedType.parameterCount() != 0) {
280 generateFactory();
281 }
282
283 // Forward the SAM method
284 MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, samMethodName,
285 samMethodType.toMethodDescriptorString(), null, null);
286 mv.visitAnnotation("Ljava/lang/invoke/LambdaForm$Hidden;", true);
287 new ForwardingMethodGenerator(mv).generate(samMethodType);
288
289 // Forward the bridges
290 if (additionalBridges != null) {
291 for (MethodType mt : additionalBridges) {
292 mv = cw.visitMethod(ACC_PUBLIC|ACC_BRIDGE, samMethodName,
293 mt.toMethodDescriptorString(), null, null);
294 mv.visitAnnotation("Ljava/lang/invoke/LambdaForm$Hidden;", true);
295 new ForwardingMethodGenerator(mv).generate(mt);
296 }
297 }
298
299 if (isSerializable)
300 generateSerializationFriendlyMethods();
301 else if (accidentallySerializable)
302 generateSerializationHostileMethods();
303
304 cw.visitEnd();
305
306 // Define the generated class in this VM.
307
308 final byte[] classBytes = cw.toByteArray();
309
310 // If requested, dump out to a file for debugging purposes
311 if (dumper != null) {
312 AccessController.doPrivileged(new PrivilegedAction<>() {
313 @Override
314 public Void run() {
315 dumper.dumpClass(lambdaClassName, classBytes);
316 return null;
317 }
318 }, null,
319 new FilePermission("<<ALL FILES>>", "read, write"),
320 // createDirectories may need it
321 new PropertyPermission("user.dir", "read"));
322 }
323
324 return UNSAFE.defineAnonymousClass(targetClass, classBytes, null);
325 }
326
327 /**
328 * Generate the factory method for the class
329 */
330 private void generateFactory() {
331 MethodVisitor m = cw.visitMethod(ACC_PRIVATE | ACC_STATIC, NAME_FACTORY, invokedType.toMethodDescriptorString(), null, null);
332 m.visitCode();
333 m.visitTypeInsn(NEW, lambdaClassName);
334 m.visitInsn(Opcodes.DUP);
335 int parameterCount = invokedType.parameterCount();
336 for (int typeIndex = 0, varIndex = 0; typeIndex < parameterCount; typeIndex++) {
337 Class<?> argType = invokedType.parameterType(typeIndex);
338 m.visitVarInsn(getLoadOpcode(argType), varIndex);
339 varIndex += getParameterSize(argType);
340 }
341 m.visitMethodInsn(INVOKESPECIAL, lambdaClassName, NAME_CTOR, constructorType.toMethodDescriptorString(), false);
342 m.visitInsn(ARETURN);
343 m.visitMaxs(-1, -1);
344 m.visitEnd();
345 }
346
347 /**
348 * Generate the constructor for the class
349 */
350 private void generateConstructor() {
351 // Generate constructor
352 MethodVisitor ctor = cw.visitMethod(ACC_PRIVATE, NAME_CTOR,
353 constructorType.toMethodDescriptorString(), null, null);
354 ctor.visitCode();
355 ctor.visitVarInsn(ALOAD, 0);
356 ctor.visitMethodInsn(INVOKESPECIAL, JAVA_LANG_OBJECT, NAME_CTOR,
357 METHOD_DESCRIPTOR_VOID, false);
358 int parameterCount = invokedType.parameterCount();
359 for (int i = 0, lvIndex = 0; i < parameterCount; i++) {
360 ctor.visitVarInsn(ALOAD, 0);
361 Class<?> argType = invokedType.parameterType(i);
362 ctor.visitVarInsn(getLoadOpcode(argType), lvIndex + 1);
363 lvIndex += getParameterSize(argType);
364 ctor.visitFieldInsn(PUTFIELD, lambdaClassName, argNames[i], argDescs[i]);
365 }
366 ctor.visitInsn(RETURN);
367 // Maxs computed by ClassWriter.COMPUTE_MAXS, these arguments ignored
368 ctor.visitMaxs(-1, -1);
369 ctor.visitEnd();
370 }
371
372 /**
373 * Generate a writeReplace method that supports serialization
374 */
375 private void generateSerializationFriendlyMethods() {
376 TypeConvertingMethodAdapter mv
377 = new TypeConvertingMethodAdapter(
378 cw.visitMethod(ACC_PRIVATE + ACC_FINAL,
379 NAME_METHOD_WRITE_REPLACE, DESCR_METHOD_WRITE_REPLACE,
380 null, null));
381
382 mv.visitCode();
383 mv.visitTypeInsn(NEW, NAME_SERIALIZED_LAMBDA);
384 mv.visitInsn(DUP);
385 mv.visitLdcInsn(Type.getType(targetClass));
386 mv.visitLdcInsn(invokedType.returnType().getName().replace('.', '/'));
387 mv.visitLdcInsn(samMethodName);
388 mv.visitLdcInsn(samMethodType.toMethodDescriptorString());
389 mv.visitLdcInsn(implInfo.getReferenceKind());
390 mv.visitLdcInsn(implInfo.getDeclaringClass().getName().replace('.', '/'));
391 mv.visitLdcInsn(implInfo.getName());
392 mv.visitLdcInsn(implInfo.getMethodType().toMethodDescriptorString());
393 mv.visitLdcInsn(instantiatedMethodType.toMethodDescriptorString());
394 mv.iconst(argDescs.length);
395 mv.visitTypeInsn(ANEWARRAY, JAVA_LANG_OBJECT);
396 for (int i = 0; i < argDescs.length; i++) {
397 mv.visitInsn(DUP);
398 mv.iconst(i);
399 mv.visitVarInsn(ALOAD, 0);
400 mv.visitFieldInsn(GETFIELD, lambdaClassName, argNames[i], argDescs[i]);
401 mv.boxIfTypePrimitive(Type.getType(argDescs[i]));
402 mv.visitInsn(AASTORE);
403 }
404 mv.visitMethodInsn(INVOKESPECIAL, NAME_SERIALIZED_LAMBDA, NAME_CTOR,
405 DESCR_CTOR_SERIALIZED_LAMBDA, false);
406 mv.visitInsn(ARETURN);
407 // Maxs computed by ClassWriter.COMPUTE_MAXS, these arguments ignored
408 mv.visitMaxs(-1, -1);
409 mv.visitEnd();
410 }
411
412 /**
413 * Generate a readObject/writeObject method that is hostile to serialization
414 */
415 private void generateSerializationHostileMethods() {
416 MethodVisitor mv = cw.visitMethod(ACC_PRIVATE + ACC_FINAL,
417 NAME_METHOD_WRITE_OBJECT, DESCR_METHOD_WRITE_OBJECT,
418 null, SER_HOSTILE_EXCEPTIONS);
419 mv.visitCode();
420 mv.visitTypeInsn(NEW, NAME_NOT_SERIALIZABLE_EXCEPTION);
421 mv.visitInsn(DUP);
422 mv.visitLdcInsn("Non-serializable lambda");
423 mv.visitMethodInsn(INVOKESPECIAL, NAME_NOT_SERIALIZABLE_EXCEPTION, NAME_CTOR,
424 DESCR_CTOR_NOT_SERIALIZABLE_EXCEPTION, false);
425 mv.visitInsn(ATHROW);
426 mv.visitMaxs(-1, -1);
427 mv.visitEnd();
428
429 mv = cw.visitMethod(ACC_PRIVATE + ACC_FINAL,
430 NAME_METHOD_READ_OBJECT, DESCR_METHOD_READ_OBJECT,
431 null, SER_HOSTILE_EXCEPTIONS);
432 mv.visitCode();
433 mv.visitTypeInsn(NEW, NAME_NOT_SERIALIZABLE_EXCEPTION);
434 mv.visitInsn(DUP);
435 mv.visitLdcInsn("Non-serializable lambda");
436 mv.visitMethodInsn(INVOKESPECIAL, NAME_NOT_SERIALIZABLE_EXCEPTION, NAME_CTOR,
437 DESCR_CTOR_NOT_SERIALIZABLE_EXCEPTION, false);
438 mv.visitInsn(ATHROW);
439 mv.visitMaxs(-1, -1);
440 mv.visitEnd();
441 }
442
443 /**
444 * This class generates a method body which calls the lambda implementation
445 * method, converting arguments, as needed.
446 */
447 private class ForwardingMethodGenerator extends TypeConvertingMethodAdapter {
448
449 ForwardingMethodGenerator(MethodVisitor mv) {
450 super(mv);
451 }
452
453 void generate(MethodType methodType) {
454 visitCode();
455
456 if (implKind == MethodHandleInfo.REF_newInvokeSpecial) {
457 visitTypeInsn(NEW, implMethodClassName);
458 visitInsn(DUP);
459 }
460 for (int i = 0; i < argNames.length; i++) {
461 visitVarInsn(ALOAD, 0);
462 visitFieldInsn(GETFIELD, lambdaClassName, argNames[i], argDescs[i]);
463 }
464
465 convertArgumentTypes(methodType);
466
467 // Invoke the method we want to forward to
468 visitMethodInsn(invocationOpcode(), implMethodClassName,
469 implMethodName, implMethodDesc,
470 implDefiningClass.isInterface());
471
472 // Convert the return value (if any) and return it
473 // Note: if adapting from non-void to void, the 'return'
474 // instruction will pop the unneeded result
475 Class<?> samReturnClass = methodType.returnType();
476 convertType(implMethodReturnClass, samReturnClass, samReturnClass);
477 visitInsn(getReturnOpcode(samReturnClass));
478 // Maxs computed by ClassWriter.COMPUTE_MAXS,these arguments ignored
479 visitMaxs(-1, -1);
480 visitEnd();
481 }
482
483 private void convertArgumentTypes(MethodType samType) {
484 int lvIndex = 0;
485 boolean samIncludesReceiver = implIsInstanceMethod &&
486 invokedType.parameterCount() == 0;
487 int samReceiverLength = samIncludesReceiver ? 1 : 0;
488 if (samIncludesReceiver) {
489 // push receiver
490 Class<?> rcvrType = samType.parameterType(0);
491 visitVarInsn(getLoadOpcode(rcvrType), lvIndex + 1);
492 lvIndex += getParameterSize(rcvrType);
493 convertType(rcvrType, implDefiningClass, instantiatedMethodType.parameterType(0));
494 }
495 int samParametersLength = samType.parameterCount();
496 int argOffset = implMethodType.parameterCount() - samParametersLength;
497 for (int i = samReceiverLength; i < samParametersLength; i++) {
498 Class<?> argType = samType.parameterType(i);
499 visitVarInsn(getLoadOpcode(argType), lvIndex + 1);
500 lvIndex += getParameterSize(argType);
501 convertType(argType, implMethodType.parameterType(argOffset + i), instantiatedMethodType.parameterType(i));
502 }
503 }
504
505 private int invocationOpcode() throws InternalError {
506 switch (implKind) {
507 case MethodHandleInfo.REF_invokeStatic:
508 return INVOKESTATIC;
509 case MethodHandleInfo.REF_newInvokeSpecial:
510 return INVOKESPECIAL;
511 case MethodHandleInfo.REF_invokeVirtual:
512 return INVOKEVIRTUAL;
513 case MethodHandleInfo.REF_invokeInterface:
514 return INVOKEINTERFACE;
515 case MethodHandleInfo.REF_invokeSpecial:
516 return INVOKESPECIAL;
517 default:
518 throw new InternalError("Unexpected invocation kind: " + implKind);
519 }
520 }
521 }
522
523 static int getParameterSize(Class<?> c) {
524 if (c == Void.TYPE) {
525 return 0;
526 } else if (c == Long.TYPE || c == Double.TYPE) {
527 return 2;
528 }
529 return 1;
530 }
531
532 static int getLoadOpcode(Class<?> c) {
533 if(c == Void.TYPE) {
534 throw new InternalError("Unexpected void type of load opcode");
535 }
536 return ILOAD + getOpcodeOffset(c);
537 }
538
539 static int getReturnOpcode(Class<?> c) {
540 if(c == Void.TYPE) {
541 return RETURN;
542 }
543 return IRETURN + getOpcodeOffset(c);
544 }
545
546 private static int getOpcodeOffset(Class<?> c) {
547 if (c.isPrimitive()) {
548 if (c == Long.TYPE) {
549 return 1;
550 } else if (c == Float.TYPE) {
551 return 2;
552 } else if (c == Double.TYPE) {
553 return 3;
554 }
555 return 0;
556 } else {
557 return 4;
558 }
559 }
560
561 }