1 /* 2 * Copyright (c) 1996, 2018, 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.reflect; 27 28 import jdk.internal.HotSpotIntrinsicCandidate; 29 import jdk.internal.misc.SharedSecrets; 30 import jdk.internal.reflect.CallerSensitive; 31 import jdk.internal.reflect.MethodAccessor; 32 import jdk.internal.reflect.Reflection; 33 import jdk.internal.vm.annotation.ForceInline; 34 import sun.reflect.annotation.ExceptionProxy; 35 import sun.reflect.annotation.TypeNotPresentExceptionProxy; 36 import sun.reflect.generics.repository.MethodRepository; 37 import sun.reflect.generics.factory.CoreReflectionFactory; 38 import sun.reflect.generics.factory.GenericsFactory; 39 import sun.reflect.generics.scope.MethodScope; 40 import sun.reflect.annotation.AnnotationType; 41 import sun.reflect.annotation.AnnotationParser; 42 import java.lang.annotation.Annotation; 43 import java.lang.annotation.AnnotationFormatError; 44 import java.nio.ByteBuffer; 45 import java.util.StringJoiner; 46 47 /** 48 * A {@code Method} provides information about, and access to, a single method 49 * on a class or interface. The reflected method may be a class method 50 * or an instance method (including an abstract method). 51 * 52 * <p>A {@code Method} permits widening conversions to occur when matching the 53 * actual parameters to invoke with the underlying method's formal 54 * parameters, but it throws an {@code IllegalArgumentException} if a 55 * narrowing conversion would occur. 56 * 57 * @see Member 58 * @see java.lang.Class 59 * @see java.lang.Class#getMethods() 60 * @see java.lang.Class#getMethod(String, Class[]) 61 * @see java.lang.Class#getDeclaredMethods() 62 * @see java.lang.Class#getDeclaredMethod(String, Class[]) 63 * 64 * @author Kenneth Russell 65 * @author Nakul Saraiya 66 * @since 1.1 67 */ 68 public final class Method extends Executable { 69 private Class<?> clazz; 70 private int slot; 71 // This is guaranteed to be interned by the VM in the 1.4 72 // reflection implementation 73 private String name; 74 private Class<?> returnType; 75 private Class<?>[] parameterTypes; 76 private Class<?>[] exceptionTypes; 77 private int modifiers; 78 // Generics and annotations support 79 private transient String signature; 80 // generic info repository; lazily initialized 81 private transient MethodRepository genericInfo; 82 private byte[] annotations; 83 private byte[] parameterAnnotations; 84 private byte[] annotationDefault; 85 private volatile MethodAccessor methodAccessor; 86 // For sharing of MethodAccessors. This branching structure is 87 // currently only two levels deep (i.e., one root Method and 88 // potentially many Method objects pointing to it.) 89 // 90 // If this branching structure would ever contain cycles, deadlocks can 91 // occur in annotation code. 92 private Method root; 93 94 // Generics infrastructure 95 private String getGenericSignature() {return signature;} 96 97 // Accessor for factory 98 private GenericsFactory getFactory() { 99 // create scope and factory 100 return CoreReflectionFactory.make(this, MethodScope.make(this)); 101 } 102 103 // Accessor for generic info repository 104 @Override 105 MethodRepository getGenericInfo() { 106 // lazily initialize repository if necessary 107 if (genericInfo == null) { 108 // create and cache generic info repository 109 genericInfo = MethodRepository.make(getGenericSignature(), 110 getFactory()); 111 } 112 return genericInfo; //return cached repository 113 } 114 115 /** 116 * Package-private constructor used by ReflectAccess to enable 117 * instantiation of these objects in Java code from the java.lang 118 * package via sun.reflect.LangReflectAccess. 119 */ 120 Method(Class<?> declaringClass, 121 String name, 122 Class<?>[] parameterTypes, 123 Class<?> returnType, 124 Class<?>[] checkedExceptions, 125 int modifiers, 126 int slot, 127 String signature, 128 byte[] annotations, 129 byte[] parameterAnnotations, 130 byte[] annotationDefault) { 131 this.clazz = declaringClass; 132 this.name = name; 133 this.parameterTypes = parameterTypes; 134 this.returnType = returnType; 135 this.exceptionTypes = checkedExceptions; 136 this.modifiers = modifiers; 137 this.slot = slot; 138 this.signature = signature; 139 this.annotations = annotations; 140 this.parameterAnnotations = parameterAnnotations; 141 this.annotationDefault = annotationDefault; 142 } 143 144 /** 145 * Package-private routine (exposed to java.lang.Class via 146 * ReflectAccess) which returns a copy of this Method. The copy's 147 * "root" field points to this Method. 148 */ 149 Method copy() { 150 // This routine enables sharing of MethodAccessor objects 151 // among Method objects which refer to the same underlying 152 // method in the VM. (All of this contortion is only necessary 153 // because of the "accessibility" bit in AccessibleObject, 154 // which implicitly requires that new java.lang.reflect 155 // objects be fabricated for each reflective call on Class 156 // objects.) 157 if (this.root != null) 158 throw new IllegalArgumentException("Can not copy a non-root Method"); 159 160 Method res = new Method(clazz, name, parameterTypes, returnType, 161 exceptionTypes, modifiers, slot, signature, 162 annotations, parameterAnnotations, annotationDefault); 163 res.root = this; 164 // Might as well eagerly propagate this if already present 165 res.methodAccessor = methodAccessor; 166 return res; 167 } 168 169 /** 170 * Make a copy of a leaf method. 171 */ 172 Method leafCopy() { 173 if (this.root == null) 174 throw new IllegalArgumentException("Can only leafCopy a non-root Method"); 175 176 Method res = new Method(clazz, name, parameterTypes, returnType, 177 exceptionTypes, modifiers, slot, signature, 178 annotations, parameterAnnotations, annotationDefault); 179 res.root = root; 180 res.methodAccessor = methodAccessor; 181 return res; 182 } 183 184 /** 185 * @throws InaccessibleObjectException {@inheritDoc} 186 * @throws SecurityException {@inheritDoc} 187 */ 188 @Override 189 @CallerSensitive 190 public void setAccessible(boolean flag) { 191 AccessibleObject.checkPermission(); 192 if (flag) checkCanSetAccessible(Reflection.getCallerClass()); 193 setAccessible0(flag); 194 } 195 196 @Override 197 void checkCanSetAccessible(Class<?> caller) { 198 checkCanSetAccessible(caller, clazz); 199 } 200 201 @Override 202 Method getRoot() { 203 return root; 204 } 205 206 @Override 207 boolean hasGenericInformation() { 208 return (getGenericSignature() != null); 209 } 210 211 @Override 212 byte[] getAnnotationBytes() { 213 return annotations; 214 } 215 216 /** 217 * Returns the {@code Class} object representing the class or interface 218 * that declares the method represented by this object. 219 */ 220 @Override 221 public Class<?> getDeclaringClass() { 222 return clazz; 223 } 224 225 /** 226 * Returns the name of the method represented by this {@code Method} 227 * object, as a {@code String}. 228 */ 229 @Override 230 public String getName() { 231 return name; 232 } 233 234 /** 235 * {@inheritDoc} 236 */ 237 @Override 238 public int getModifiers() { 239 return modifiers; 240 } 241 242 /** 243 * {@inheritDoc} 244 * @throws GenericSignatureFormatError {@inheritDoc} 245 * @since 1.5 246 */ 247 @Override 248 @SuppressWarnings({"rawtypes", "unchecked"}) 249 public TypeVariable<Method>[] getTypeParameters() { 250 if (getGenericSignature() != null) 251 return (TypeVariable<Method>[])getGenericInfo().getTypeParameters(); 252 else 253 return (TypeVariable<Method>[])new TypeVariable[0]; 254 } 255 256 /** 257 * Returns a {@code Class} object that represents the formal return type 258 * of the method represented by this {@code Method} object. 259 * 260 * @return the return type for the method this object represents 261 */ 262 public Class<?> getReturnType() { 263 return returnType; 264 } 265 266 /** 267 * Returns a {@code Type} object that represents the formal return 268 * type of the method represented by this {@code Method} object. 269 * 270 * <p>If the return type is a parameterized type, 271 * the {@code Type} object returned must accurately reflect 272 * the actual type parameters used in the source code. 273 * 274 * <p>If the return type is a type variable or a parameterized type, it 275 * is created. Otherwise, it is resolved. 276 * 277 * @return a {@code Type} object that represents the formal return 278 * type of the underlying method 279 * @throws GenericSignatureFormatError 280 * if the generic method signature does not conform to the format 281 * specified in 282 * <cite>The Java™ Virtual Machine Specification</cite> 283 * @throws TypeNotPresentException if the underlying method's 284 * return type refers to a non-existent type declaration 285 * @throws MalformedParameterizedTypeException if the 286 * underlying method's return typed refers to a parameterized 287 * type that cannot be instantiated for any reason 288 * @since 1.5 289 */ 290 public Type getGenericReturnType() { 291 if (getGenericSignature() != null) { 292 return getGenericInfo().getReturnType(); 293 } else { return getReturnType();} 294 } 295 296 @Override 297 Class<?>[] getSharedParameterTypes() { 298 return parameterTypes; 299 } 300 301 @Override 302 Class<?>[] getSharedExceptionTypes() { 303 return exceptionTypes; 304 } 305 306 /** 307 * {@inheritDoc} 308 */ 309 @Override 310 public Class<?>[] getParameterTypes() { 311 return parameterTypes.clone(); 312 } 313 314 /** 315 * {@inheritDoc} 316 * @since 1.8 317 */ 318 public int getParameterCount() { return parameterTypes.length; } 319 320 321 /** 322 * {@inheritDoc} 323 * @throws GenericSignatureFormatError {@inheritDoc} 324 * @throws TypeNotPresentException {@inheritDoc} 325 * @throws MalformedParameterizedTypeException {@inheritDoc} 326 * @since 1.5 327 */ 328 @Override 329 public Type[] getGenericParameterTypes() { 330 return super.getGenericParameterTypes(); 331 } 332 333 /** 334 * {@inheritDoc} 335 */ 336 @Override 337 public Class<?>[] getExceptionTypes() { 338 return exceptionTypes.clone(); 339 } 340 341 /** 342 * {@inheritDoc} 343 * @throws GenericSignatureFormatError {@inheritDoc} 344 * @throws TypeNotPresentException {@inheritDoc} 345 * @throws MalformedParameterizedTypeException {@inheritDoc} 346 * @since 1.5 347 */ 348 @Override 349 public Type[] getGenericExceptionTypes() { 350 return super.getGenericExceptionTypes(); 351 } 352 353 /** 354 * Compares this {@code Method} against the specified object. Returns 355 * true if the objects are the same. Two {@code Methods} are the same if 356 * they were declared by the same class and have the same name 357 * and formal parameter types and return type. 358 */ 359 public boolean equals(Object obj) { 360 if (obj != null && obj instanceof Method) { 361 Method other = (Method)obj; 362 if ((getDeclaringClass() == other.getDeclaringClass()) 363 && (getName() == other.getName())) { 364 if (!returnType.equals(other.getReturnType())) 365 return false; 366 return equalParamTypes(parameterTypes, other.parameterTypes); 367 } 368 } 369 return false; 370 } 371 372 /** 373 * Returns a hashcode for this {@code Method}. The hashcode is computed 374 * as the exclusive-or of the hashcodes for the underlying 375 * method's declaring class name and the method's name. 376 */ 377 public int hashCode() { 378 return getDeclaringClass().getName().hashCode() ^ getName().hashCode(); 379 } 380 381 /** 382 * Returns a string describing this {@code Method}. The string is 383 * formatted as the method access modifiers, if any, followed by 384 * the method return type, followed by a space, followed by the 385 * class declaring the method, followed by a period, followed by 386 * the method name, followed by a parenthesized, comma-separated 387 * list of the method's formal parameter types. If the method 388 * throws checked exceptions, the parameter list is followed by a 389 * space, followed by the word "{@code throws}" followed by a 390 * comma-separated list of the thrown exception types. 391 * For example: 392 * <pre> 393 * public boolean java.lang.Object.equals(java.lang.Object) 394 * </pre> 395 * 396 * <p>The access modifiers are placed in canonical order as 397 * specified by "The Java Language Specification". This is 398 * {@code public}, {@code protected} or {@code private} first, 399 * and then other modifiers in the following order: 400 * {@code abstract}, {@code default}, {@code static}, {@code final}, 401 * {@code synchronized}, {@code native}, {@code strictfp}. 402 * 403 * @return a string describing this {@code Method} 404 * 405 * @jls 8.4.3 Method Modifiers 406 * @jls 9.4 Method Declarations 407 * @jls 9.6.1 Annotation Type Elements 408 */ 409 public String toString() { 410 return sharedToString(Modifier.methodModifiers(), 411 isDefault(), 412 parameterTypes, 413 exceptionTypes); 414 } 415 416 @Override 417 void specificToStringHeader(StringBuilder sb) { 418 sb.append(getReturnType().getTypeName()).append(' '); 419 sb.append(getDeclaringClass().getTypeName()).append('.'); 420 sb.append(getName()); 421 } 422 423 @Override 424 String toShortString() { 425 StringBuilder sb = new StringBuilder("method "); 426 sb.append(getDeclaringClass().getTypeName()).append('.'); 427 sb.append(getName()); 428 sb.append('('); 429 StringJoiner sj = new StringJoiner(","); 430 for (Class<?> parameterType : getParameterTypes()) { 431 sj.add(parameterType.getTypeName()); 432 } 433 sb.append(sj); 434 sb.append(')'); 435 return sb.toString(); 436 } 437 438 /** 439 * Returns a string describing this {@code Method}, including 440 * type parameters. The string is formatted as the method access 441 * modifiers, if any, followed by an angle-bracketed 442 * comma-separated list of the method's type parameters, if any, 443 * followed by the method's generic return type, followed by a 444 * space, followed by the class declaring the method, followed by 445 * a period, followed by the method name, followed by a 446 * parenthesized, comma-separated list of the method's generic 447 * formal parameter types. 448 * 449 * If this method was declared to take a variable number of 450 * arguments, instead of denoting the last parameter as 451 * "<code><i>Type</i>[]</code>", it is denoted as 452 * "<code><i>Type</i>...</code>". 453 * 454 * A space is used to separate access modifiers from one another 455 * and from the type parameters or return type. If there are no 456 * type parameters, the type parameter list is elided; if the type 457 * parameter list is present, a space separates the list from the 458 * class name. If the method is declared to throw exceptions, the 459 * parameter list is followed by a space, followed by the word 460 * "{@code throws}" followed by a comma-separated list of the generic 461 * thrown exception types. 462 * 463 * <p>The access modifiers are placed in canonical order as 464 * specified by "The Java Language Specification". This is 465 * {@code public}, {@code protected} or {@code private} first, 466 * and then other modifiers in the following order: 467 * {@code abstract}, {@code default}, {@code static}, {@code final}, 468 * {@code synchronized}, {@code native}, {@code strictfp}. 469 * 470 * @return a string describing this {@code Method}, 471 * include type parameters 472 * 473 * @since 1.5 474 * 475 * @jls 8.4.3 Method Modifiers 476 * @jls 9.4 Method Declarations 477 * @jls 9.6.1 Annotation Type Elements 478 */ 479 @Override 480 public String toGenericString() { 481 return sharedToGenericString(Modifier.methodModifiers(), isDefault()); 482 } 483 484 @Override 485 void specificToGenericStringHeader(StringBuilder sb) { 486 Type genRetType = getGenericReturnType(); 487 sb.append(genRetType.getTypeName()).append(' '); 488 sb.append(getDeclaringClass().getTypeName()).append('.'); 489 sb.append(getName()); 490 } 491 492 /** 493 * Invokes the underlying method represented by this {@code Method} 494 * object, on the specified object with the specified parameters. 495 * Individual parameters are automatically unwrapped to match 496 * primitive formal parameters, and both primitive and reference 497 * parameters are subject to method invocation conversions as 498 * necessary. 499 * 500 * <p>If the underlying method is static, then the specified {@code obj} 501 * argument is ignored. It may be null. 502 * 503 * <p>If the number of formal parameters required by the underlying method is 504 * 0, the supplied {@code args} array may be of length 0 or null. 505 * 506 * <p>If the underlying method is an instance method, it is invoked 507 * using dynamic method lookup as documented in The Java Language 508 * Specification, section 15.12.4.4; in particular, 509 * overriding based on the runtime type of the target object may occur. 510 * 511 * <p>If the underlying method is static, the class that declared 512 * the method is initialized if it has not already been initialized. 513 * 514 * <p>If the method completes normally, the value it returns is 515 * returned to the caller of invoke; if the value has a primitive 516 * type, it is first appropriately wrapped in an object. However, 517 * if the value has the type of an array of a primitive type, the 518 * elements of the array are <i>not</i> wrapped in objects; in 519 * other words, an array of primitive type is returned. If the 520 * underlying method return type is void, the invocation returns 521 * null. 522 * 523 * @param obj the object the underlying method is invoked from 524 * @param args the arguments used for the method call 525 * @return the result of dispatching the method represented by 526 * this object on {@code obj} with parameters 527 * {@code args} 528 * 529 * @exception IllegalAccessException if this {@code Method} object 530 * is enforcing Java language access control and the underlying 531 * method is inaccessible. 532 * @exception IllegalArgumentException if the method is an 533 * instance method and the specified object argument 534 * is not an instance of the class or interface 535 * declaring the underlying method (or of a subclass 536 * or implementor thereof); if the number of actual 537 * and formal parameters differ; if an unwrapping 538 * conversion for primitive arguments fails; or if, 539 * after possible unwrapping, a parameter value 540 * cannot be converted to the corresponding formal 541 * parameter type by a method invocation conversion. 542 * @exception InvocationTargetException if the underlying method 543 * throws an exception. 544 * @exception NullPointerException if the specified object is null 545 * and the method is an instance method. 546 * @exception ExceptionInInitializerError if the initialization 547 * provoked by this method fails. 548 */ 549 @CallerSensitive 550 @ForceInline // to ensure Reflection.getCallerClass optimization 551 @HotSpotIntrinsicCandidate 552 public Object invoke(Object obj, Object... args) 553 throws IllegalAccessException, IllegalArgumentException, 554 InvocationTargetException 555 { 556 if (!override) { 557 Class<?> caller = Reflection.getCallerClass(); 558 checkAccess(caller, clazz, 559 Modifier.isStatic(modifiers) ? null : obj.getClass(), 560 modifiers); 561 } 562 MethodAccessor ma = methodAccessor; // read volatile 563 if (ma == null) { 564 ma = acquireMethodAccessor(); 565 } 566 return ma.invoke(obj, args); 567 } 568 569 /** 570 * Returns {@code true} if this method is a bridge 571 * method; returns {@code false} otherwise. 572 * 573 * @return true if and only if this method is a bridge 574 * method as defined by the Java Language Specification. 575 * @since 1.5 576 */ 577 public boolean isBridge() { 578 return (getModifiers() & Modifier.BRIDGE) != 0; 579 } 580 581 /** 582 * {@inheritDoc} 583 * @since 1.5 584 */ 585 @Override 586 public boolean isVarArgs() { 587 return super.isVarArgs(); 588 } 589 590 /** 591 * {@inheritDoc} 592 * @jls 13.1 The Form of a Binary 593 * @since 1.5 594 */ 595 @Override 596 public boolean isSynthetic() { 597 return super.isSynthetic(); 598 } 599 600 /** 601 * Returns {@code true} if this method is a default 602 * method; returns {@code false} otherwise. 603 * 604 * A default method is a public non-abstract instance method, that 605 * is, a non-static method with a body, declared in an interface 606 * type. 607 * 608 * @return true if and only if this method is a default 609 * method as defined by the Java Language Specification. 610 * @since 1.8 611 */ 612 public boolean isDefault() { 613 // Default methods are public non-abstract instance methods 614 // declared in an interface. 615 return ((getModifiers() & (Modifier.ABSTRACT | Modifier.PUBLIC | Modifier.STATIC)) == 616 Modifier.PUBLIC) && getDeclaringClass().isInterface(); 617 } 618 619 // NOTE that there is no synchronization used here. It is correct 620 // (though not efficient) to generate more than one MethodAccessor 621 // for a given Method. However, avoiding synchronization will 622 // probably make the implementation more scalable. 623 private MethodAccessor acquireMethodAccessor() { 624 // First check to see if one has been created yet, and take it 625 // if so 626 MethodAccessor tmp = null; 627 if (root != null) tmp = root.getMethodAccessor(); 628 if (tmp != null) { 629 methodAccessor = tmp; 630 } else { 631 // Otherwise fabricate one and propagate it up to the root 632 tmp = reflectionFactory.newMethodAccessor(this); 633 setMethodAccessor(tmp); 634 } 635 636 return tmp; 637 } 638 639 // Returns MethodAccessor for this Method object, not looking up 640 // the chain to the root 641 MethodAccessor getMethodAccessor() { 642 return methodAccessor; 643 } 644 645 // Sets the MethodAccessor for this Method object and 646 // (recursively) its root 647 void setMethodAccessor(MethodAccessor accessor) { 648 methodAccessor = accessor; 649 // Propagate up 650 if (root != null) { 651 root.setMethodAccessor(accessor); 652 } 653 } 654 655 /** 656 * Returns the default value for the annotation member represented by 657 * this {@code Method} instance. If the member is of a primitive type, 658 * an instance of the corresponding wrapper type is returned. Returns 659 * null if no default is associated with the member, or if the method 660 * instance does not represent a declared member of an annotation type. 661 * 662 * @return the default value for the annotation member represented 663 * by this {@code Method} instance. 664 * @throws TypeNotPresentException if the annotation is of type 665 * {@link Class} and no definition can be found for the 666 * default class value. 667 * @since 1.5 668 */ 669 public Object getDefaultValue() { 670 if (annotationDefault == null) 671 return null; 672 Class<?> memberType = AnnotationType.invocationHandlerReturnType( 673 getReturnType()); 674 Object result = AnnotationParser.parseMemberValue( 675 memberType, ByteBuffer.wrap(annotationDefault), 676 SharedSecrets.getJavaLangAccess(). 677 getConstantPool(getDeclaringClass()), 678 getDeclaringClass()); 679 if (result instanceof ExceptionProxy) { 680 if (result instanceof TypeNotPresentExceptionProxy) { 681 TypeNotPresentExceptionProxy proxy = (TypeNotPresentExceptionProxy)result; 682 throw new TypeNotPresentException(proxy.typeName(), proxy.getCause()); 683 } 684 throw new AnnotationFormatError("Invalid default: " + this); 685 } 686 return result; 687 } 688 689 /** 690 * {@inheritDoc} 691 * @throws NullPointerException {@inheritDoc} 692 * @since 1.5 693 */ 694 public <T extends Annotation> T getAnnotation(Class<T> annotationClass) { 695 return super.getAnnotation(annotationClass); 696 } 697 698 /** 699 * {@inheritDoc} 700 * @since 1.5 701 */ 702 public Annotation[] getDeclaredAnnotations() { 703 return super.getDeclaredAnnotations(); 704 } 705 706 /** 707 * {@inheritDoc} 708 * @since 1.5 709 */ 710 @Override 711 public Annotation[][] getParameterAnnotations() { 712 return sharedGetParameterAnnotations(parameterTypes, parameterAnnotations); 713 } 714 715 /** 716 * {@inheritDoc} 717 * @since 1.8 718 */ 719 @Override 720 public AnnotatedType getAnnotatedReturnType() { 721 return getAnnotatedReturnType0(getGenericReturnType()); 722 } 723 724 @Override 725 boolean handleParameterNumberMismatch(int resultLength, int numParameters) { 726 throw new AnnotationFormatError("Parameter annotations don't match number of parameters"); 727 } 728 }