1 /*
   2  * Copyright (c) 2012, 2015, 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 java.lang.annotation.*;
  29 import java.util.Map;
  30 import java.util.Objects;

  31 
  32 import jdk.internal.misc.SharedSecrets;
  33 import sun.reflect.annotation.AnnotationParser;
  34 import sun.reflect.annotation.AnnotationSupport;
  35 import sun.reflect.annotation.TypeAnnotationParser;
  36 import sun.reflect.annotation.TypeAnnotation;
  37 import sun.reflect.generics.repository.ConstructorRepository;
  38 
  39 /**
  40  * A shared superclass for the common functionality of {@link Method}
  41  * and {@link Constructor}.
  42  *
  43  * @since 1.8
  44  */
  45 public abstract class Executable extends AccessibleObject
  46     implements Member, GenericDeclaration {
  47     /*
  48      * Only grant package-visibility to the constructor.
  49      */
  50     Executable() {}
  51 
  52     /**
  53      * Accessor method to allow code sharing
  54      */
  55     abstract byte[] getAnnotationBytes();
  56 
  57     /**
  58      * Accessor method to allow code sharing
  59      */
  60     abstract Executable getRoot();
  61 
  62     /**
  63      * Does the Executable have generic information.
  64      */
  65     abstract boolean hasGenericInformation();
  66 
  67     abstract ConstructorRepository getGenericInfo();
  68 
  69     boolean equalParamTypes(Class<?>[] params1, Class<?>[] params2) {
  70         /* Avoid unnecessary cloning */
  71         if (params1.length == params2.length) {
  72             for (int i = 0; i < params1.length; i++) {
  73                 if (params1[i] != params2[i])
  74                     return false;
  75             }
  76             return true;
  77         }
  78         return false;
  79     }
  80 
  81     Annotation[][] parseParameterAnnotations(byte[] parameterAnnotations) {
  82         return AnnotationParser.parseParameterAnnotations(
  83                parameterAnnotations,
  84                SharedSecrets.getJavaLangAccess().
  85                getConstantPool(getDeclaringClass()),
  86                getDeclaringClass());
  87     }
  88 
  89     void separateWithCommas(Class<?>[] types, StringBuilder sb) {
  90         for (int j = 0; j < types.length; j++) {
  91             sb.append(types[j].getTypeName());
  92             if (j < (types.length - 1))
  93                 sb.append(",");
  94         }
  95 
  96     }
  97 
  98     void printModifiersIfNonzero(StringBuilder sb, int mask, boolean isDefault) {
  99         int mod = getModifiers() & mask;
 100 
 101         if (mod != 0 && !isDefault) {
 102             sb.append(Modifier.toString(mod)).append(' ');
 103         } else {
 104             int access_mod = mod & Modifier.ACCESS_MODIFIERS;
 105             if (access_mod != 0)
 106                 sb.append(Modifier.toString(access_mod)).append(' ');
 107             if (isDefault)
 108                 sb.append("default ");
 109             mod = (mod & ~Modifier.ACCESS_MODIFIERS);
 110             if (mod != 0)
 111                 sb.append(Modifier.toString(mod)).append(' ');
 112         }
 113     }
 114 
 115     String sharedToString(int modifierMask,
 116                           boolean isDefault,
 117                           Class<?>[] parameterTypes,
 118                           Class<?>[] exceptionTypes) {
 119         try {
 120             StringBuilder sb = new StringBuilder();
 121 
 122             printModifiersIfNonzero(sb, modifierMask, isDefault);
 123             specificToStringHeader(sb);






 124 
 125             sb.append('(');
 126             separateWithCommas(parameterTypes, sb);
 127             sb.append(')');
 128             if (exceptionTypes.length > 0) {
 129                 sb.append(" throws ");
 130                 separateWithCommas(exceptionTypes, sb);



 131             }
 132             return sb.toString();
 133         } catch (Exception e) {
 134             return "<" + e + ">";
 135         }
 136     }
 137 
 138     /**
 139      * Generate toString header information specific to a method or
 140      * constructor.
 141      */
 142     abstract void specificToStringHeader(StringBuilder sb);
 143 
 144     String sharedToGenericString(int modifierMask, boolean isDefault) {
 145         try {
 146             StringBuilder sb = new StringBuilder();
 147 
 148             printModifiersIfNonzero(sb, modifierMask, isDefault);
 149 
 150             TypeVariable<?>[] typeparms = getTypeParameters();
 151             if (typeparms.length > 0) {
 152                 boolean first = true;
 153                 sb.append('<');
 154                 for(TypeVariable<?> typeparm: typeparms) {
 155                     if (!first)
 156                         sb.append(',');
 157                     // Class objects can't occur here; no need to test
 158                     // and call Class.getName().
 159                     sb.append(typeparm.toString());
 160                     first = false;
 161                 }
 162                 sb.append("> ");
 163             }
 164 
 165             specificToGenericStringHeader(sb);
 166 
 167             sb.append('(');


 168             Type[] params = getGenericParameterTypes();
 169             for (int j = 0; j < params.length; j++) {
 170                 String param = params[j].getTypeName();
 171                 if (isVarArgs() && (j == params.length - 1)) // replace T[] with T...
 172                     param = param.replaceFirst("\\[\\]$", "...");
 173                 sb.append(param);
 174                 if (j < (params.length - 1))
 175                     sb.append(',');
 176             }
 177             sb.append(')');
 178             Type[] exceptions = getGenericExceptionTypes();
 179             if (exceptions.length > 0) {
 180                 sb.append(" throws ");
 181                 for (int k = 0; k < exceptions.length; k++) {
 182                     sb.append((exceptions[k] instanceof Class)?
 183                               ((Class)exceptions[k]).getName():
 184                               exceptions[k].toString());
 185                     if (k < (exceptions.length - 1))
 186                         sb.append(',');
 187                 }

 188             }
 189             return sb.toString();
 190         } catch (Exception e) {
 191             return "<" + e + ">";
 192         }
 193     }
 194 
 195     /**
 196      * Generate toGenericString header information specific to a
 197      * method or constructor.
 198      */
 199     abstract void specificToGenericStringHeader(StringBuilder sb);
 200 
 201     /**
 202      * Returns the {@code Class} object representing the class or interface
 203      * that declares the executable represented by this object.
 204      */
 205     public abstract Class<?> getDeclaringClass();
 206 
 207     /**
 208      * Returns the name of the executable represented by this object.
 209      */
 210     public abstract String getName();
 211 
 212     /**
 213      * Returns the Java language {@linkplain Modifier modifiers} for
 214      * the executable represented by this object.
 215      */
 216     public abstract int getModifiers();
 217 
 218     /**
 219      * Returns an array of {@code TypeVariable} objects that represent the
 220      * type variables declared by the generic declaration represented by this
 221      * {@code GenericDeclaration} object, in declaration order.  Returns an
 222      * array of length 0 if the underlying generic declaration declares no type
 223      * variables.
 224      *
 225      * @return an array of {@code TypeVariable} objects that represent
 226      *     the type variables declared by this generic declaration
 227      * @throws GenericSignatureFormatError if the generic
 228      *     signature of this generic declaration does not conform to
 229      *     the format specified in
 230      *     <cite>The Java&trade; Virtual Machine Specification</cite>
 231      */
 232     public abstract TypeVariable<?>[] getTypeParameters();
 233 
 234     /**
 235      * Returns an array of {@code Class} objects that represent the formal
 236      * parameter types, in declaration order, of the executable
 237      * represented by this object.  Returns an array of length
 238      * 0 if the underlying executable takes no parameters.
 239      *
 240      * @return the parameter types for the executable this object
 241      * represents
 242      */
 243     public abstract Class<?>[] getParameterTypes();
 244 
 245     /**
 246      * Returns the number of formal parameters (whether explicitly
 247      * declared or implicitly declared or neither) for the executable
 248      * represented by this object.
 249      *
 250      * @return The number of formal parameters for the executable this
 251      * object represents
 252      */
 253     public int getParameterCount() {
 254         throw new AbstractMethodError();
 255     }
 256 
 257     /**
 258      * Returns an array of {@code Type} objects that represent the formal
 259      * parameter types, in declaration order, of the executable represented by
 260      * this object. Returns an array of length 0 if the
 261      * underlying executable takes no parameters.
 262      *
 263      * <p>If a formal parameter type is a parameterized type,
 264      * the {@code Type} object returned for it must accurately reflect
 265      * the actual type parameters used in the source code.
 266      *
 267      * <p>If a formal parameter type is a type variable or a parameterized
 268      * type, it is created. Otherwise, it is resolved.
 269      *
 270      * @return an array of {@code Type}s that represent the formal
 271      *     parameter types of the underlying executable, in declaration order
 272      * @throws GenericSignatureFormatError
 273      *     if the generic method signature does not conform to the format
 274      *     specified in
 275      *     <cite>The Java&trade; Virtual Machine Specification</cite>
 276      * @throws TypeNotPresentException if any of the parameter
 277      *     types of the underlying executable refers to a non-existent type
 278      *     declaration
 279      * @throws MalformedParameterizedTypeException if any of
 280      *     the underlying executable's parameter types refer to a parameterized
 281      *     type that cannot be instantiated for any reason
 282      */
 283     public Type[] getGenericParameterTypes() {
 284         if (hasGenericInformation())
 285             return getGenericInfo().getParameterTypes();
 286         else
 287             return getParameterTypes();
 288     }
 289 
 290     /**
 291      * Behaves like {@code getGenericParameterTypes}, but returns type
 292      * information for all parameters, including synthetic parameters.
 293      */
 294     Type[] getAllGenericParameterTypes() {
 295         final boolean genericInfo = hasGenericInformation();
 296 
 297         // Easy case: we don't have generic parameter information.  In
 298         // this case, we just return the result of
 299         // getParameterTypes().
 300         if (!genericInfo) {
 301             return getParameterTypes();
 302         } else {
 303             final boolean realParamData = hasRealParameterData();
 304             final Type[] genericParamTypes = getGenericParameterTypes();
 305             final Type[] nonGenericParamTypes = getParameterTypes();
 306             final Type[] out = new Type[nonGenericParamTypes.length];
 307             final Parameter[] params = getParameters();
 308             int fromidx = 0;
 309             // If we have real parameter data, then we use the
 310             // synthetic and mandate flags to our advantage.
 311             if (realParamData) {
 312                 for (int i = 0; i < out.length; i++) {
 313                     final Parameter param = params[i];
 314                     if (param.isSynthetic() || param.isImplicit()) {
 315                         // If we hit a synthetic or mandated parameter,
 316                         // use the non generic parameter info.
 317                         out[i] = nonGenericParamTypes[i];
 318                     } else {
 319                         // Otherwise, use the generic parameter info.
 320                         out[i] = genericParamTypes[fromidx];
 321                         fromidx++;
 322                     }
 323                 }
 324             } else {
 325                 // Otherwise, use the non-generic parameter data.
 326                 // Without method parameter reflection data, we have
 327                 // no way to figure out which parameters are
 328                 // synthetic/mandated, thus, no way to match up the
 329                 // indexes.
 330                 return genericParamTypes.length == nonGenericParamTypes.length ?
 331                     genericParamTypes : nonGenericParamTypes;
 332             }
 333             return out;
 334         }
 335     }
 336 
 337     /**
 338      * Returns an array of {@code Parameter} objects that represent
 339      * all the parameters to the underlying executable represented by
 340      * this object.  Returns an array of length 0 if the executable
 341      * has no parameters.
 342      *
 343      * <p>The parameters of the underlying executable do not necessarily
 344      * have unique names, or names that are legal identifiers in the
 345      * Java programming language (JLS 3.8).
 346      *
 347      * @throws MalformedParametersException if the class file contains
 348      * a MethodParameters attribute that is improperly formatted.
 349      * @return an array of {@code Parameter} objects representing all
 350      * the parameters to the executable this object represents.
 351      */
 352     public Parameter[] getParameters() {
 353         // TODO: This may eventually need to be guarded by security
 354         // mechanisms similar to those in Field, Method, etc.
 355         //
 356         // Need to copy the cached array to prevent users from messing
 357         // with it.  Since parameters are immutable, we can
 358         // shallow-copy.
 359         return privateGetParameters().clone();
 360     }
 361 
 362     private Parameter[] synthesizeAllParams() {
 363         final int realparams = getParameterCount();
 364         final Parameter[] out = new Parameter[realparams];
 365         for (int i = 0; i < realparams; i++)
 366             // TODO: is there a way to synthetically derive the
 367             // modifiers?  Probably not in the general case, since
 368             // we'd have no way of knowing about them, but there
 369             // may be specific cases.
 370             out[i] = new Parameter("arg" + i, 0, this, i);
 371         return out;
 372     }
 373 
 374     private void verifyParameters(final Parameter[] parameters) {
 375         final int mask = Modifier.FINAL | Modifier.SYNTHETIC | Modifier.MANDATED;
 376 
 377         if (getParameterTypes().length != parameters.length)
 378             throw new MalformedParametersException("Wrong number of parameters in MethodParameters attribute");
 379 
 380         for (Parameter parameter : parameters) {
 381             final String name = parameter.getRealName();
 382             final int mods = parameter.getModifiers();
 383 
 384             if (name != null) {
 385                 if (name.isEmpty() || name.indexOf('.') != -1 ||
 386                     name.indexOf(';') != -1 || name.indexOf('[') != -1 ||
 387                     name.indexOf('/') != -1) {
 388                     throw new MalformedParametersException("Invalid parameter name \"" + name + "\"");
 389                 }
 390             }
 391 
 392             if (mods != (mods & mask)) {
 393                 throw new MalformedParametersException("Invalid parameter modifiers");
 394             }
 395         }
 396     }
 397 
 398     private Parameter[] privateGetParameters() {
 399         // Use tmp to avoid multiple writes to a volatile.
 400         Parameter[] tmp = parameters;
 401 
 402         if (tmp == null) {
 403 
 404             // Otherwise, go to the JVM to get them
 405             try {
 406                 tmp = getParameters0();
 407             } catch(IllegalArgumentException e) {
 408                 // Rethrow ClassFormatErrors
 409                 throw new MalformedParametersException("Invalid constant pool index");
 410             }
 411 
 412             // If we get back nothing, then synthesize parameters
 413             if (tmp == null) {
 414                 hasRealParameterData = false;
 415                 tmp = synthesizeAllParams();
 416             } else {
 417                 hasRealParameterData = true;
 418                 verifyParameters(tmp);
 419             }
 420 
 421             parameters = tmp;
 422         }
 423 
 424         return tmp;
 425     }
 426 
 427     boolean hasRealParameterData() {
 428         // If this somehow gets called before parameters gets
 429         // initialized, force it into existence.
 430         if (parameters == null) {
 431             privateGetParameters();
 432         }
 433         return hasRealParameterData;
 434     }
 435 
 436     private transient volatile boolean hasRealParameterData;
 437     private transient volatile Parameter[] parameters;
 438 
 439     private native Parameter[] getParameters0();
 440     native byte[] getTypeAnnotationBytes0();
 441 
 442     // Needed by reflectaccess
 443     byte[] getTypeAnnotationBytes() {
 444         return getTypeAnnotationBytes0();
 445     }
 446 
 447     /**
 448      * Returns an array of {@code Class} objects that represent the
 449      * types of exceptions declared to be thrown by the underlying
 450      * executable represented by this object.  Returns an array of
 451      * length 0 if the executable declares no exceptions in its {@code
 452      * throws} clause.
 453      *
 454      * @return the exception types declared as being thrown by the
 455      * executable this object represents
 456      */
 457     public abstract Class<?>[] getExceptionTypes();
 458 
 459     /**
 460      * Returns an array of {@code Type} objects that represent the
 461      * exceptions declared to be thrown by this executable object.
 462      * Returns an array of length 0 if the underlying executable declares
 463      * no exceptions in its {@code throws} clause.
 464      *
 465      * <p>If an exception type is a type variable or a parameterized
 466      * type, it is created. Otherwise, it is resolved.
 467      *
 468      * @return an array of Types that represent the exception types
 469      *     thrown by the underlying executable
 470      * @throws GenericSignatureFormatError
 471      *     if the generic method signature does not conform to the format
 472      *     specified in
 473      *     <cite>The Java&trade; Virtual Machine Specification</cite>
 474      * @throws TypeNotPresentException if the underlying executable's
 475      *     {@code throws} clause refers to a non-existent type declaration
 476      * @throws MalformedParameterizedTypeException if
 477      *     the underlying executable's {@code throws} clause refers to a
 478      *     parameterized type that cannot be instantiated for any reason
 479      */
 480     public Type[] getGenericExceptionTypes() {
 481         Type[] result;
 482         if (hasGenericInformation() &&
 483             ((result = getGenericInfo().getExceptionTypes()).length > 0))
 484             return result;
 485         else
 486             return getExceptionTypes();
 487     }
 488 
 489     /**
 490      * Returns a string describing this {@code Executable}, including
 491      * any type parameters.
 492      * @return a string describing this {@code Executable}, including
 493      * any type parameters
 494      */
 495     public abstract String toGenericString();
 496 
 497     /**
 498      * Returns {@code true} if this executable was declared to take a
 499      * variable number of arguments; returns {@code false} otherwise.
 500      *
 501      * @return {@code true} if an only if this executable was declared
 502      * to take a variable number of arguments.
 503      */
 504     public boolean isVarArgs()  {
 505         return (getModifiers() & Modifier.VARARGS) != 0;
 506     }
 507 
 508     /**
 509      * Returns {@code true} if this executable is a synthetic
 510      * construct; returns {@code false} otherwise.
 511      *
 512      * @return true if and only if this executable is a synthetic
 513      * construct as defined by
 514      * <cite>The Java&trade; Language Specification</cite>.
 515      * @jls 13.1 The Form of a Binary
 516      */
 517     public boolean isSynthetic() {
 518         return Modifier.isSynthetic(getModifiers());
 519     }
 520 
 521     /**
 522      * Returns an array of arrays of {@code Annotation}s that
 523      * represent the annotations on the formal parameters, in
 524      * declaration order, of the {@code Executable} represented by
 525      * this object.  Synthetic and mandated parameters (see
 526      * explanation below), such as the outer "this" parameter to an
 527      * inner class constructor will be represented in the returned
 528      * array.  If the executable has no parameters (meaning no formal,
 529      * no synthetic, and no mandated parameters), a zero-length array
 530      * will be returned.  If the {@code Executable} has one or more
 531      * parameters, a nested array of length zero is returned for each
 532      * parameter with no annotations. The annotation objects contained
 533      * in the returned arrays are serializable.  The caller of this
 534      * method is free to modify the returned arrays; it will have no
 535      * effect on the arrays returned to other callers.
 536      *
 537      * A compiler may add extra parameters that are implicitly
 538      * declared in source ("mandated"), as well as parameters that
 539      * are neither implicitly nor explicitly declared in source
 540      * ("synthetic") to the parameter list for a method.  See {@link
 541      * java.lang.reflect.Parameter} for more information.
 542      *
 543      * @see java.lang.reflect.Parameter
 544      * @see java.lang.reflect.Parameter#getAnnotations
 545      * @return an array of arrays that represent the annotations on
 546      *    the formal and implicit parameters, in declaration order, of
 547      *    the executable represented by this object
 548      */
 549     public abstract Annotation[][] getParameterAnnotations();
 550 
 551     Annotation[][] sharedGetParameterAnnotations(Class<?>[] parameterTypes,
 552                                                  byte[] parameterAnnotations) {
 553         int numParameters = parameterTypes.length;
 554         if (parameterAnnotations == null)
 555             return new Annotation[numParameters][0];
 556 
 557         Annotation[][] result = parseParameterAnnotations(parameterAnnotations);
 558 
 559         if (result.length != numParameters)
 560             handleParameterNumberMismatch(result.length, numParameters);
 561         return result;
 562     }
 563 
 564     abstract void handleParameterNumberMismatch(int resultLength, int numParameters);
 565 
 566     /**
 567      * {@inheritDoc}
 568      * @throws NullPointerException  {@inheritDoc}
 569      */
 570     public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
 571         Objects.requireNonNull(annotationClass);
 572         return annotationClass.cast(declaredAnnotations().get(annotationClass));
 573     }
 574 
 575     /**
 576      * {@inheritDoc}
 577      * @throws NullPointerException {@inheritDoc}
 578      */
 579     @Override
 580     public <T extends Annotation> T[] getAnnotationsByType(Class<T> annotationClass) {
 581         Objects.requireNonNull(annotationClass);
 582 
 583         return AnnotationSupport.getDirectlyAndIndirectlyPresent(declaredAnnotations(), annotationClass);
 584     }
 585 
 586     /**
 587      * {@inheritDoc}
 588      */
 589     public Annotation[] getDeclaredAnnotations()  {
 590         return AnnotationParser.toArray(declaredAnnotations());
 591     }
 592 
 593     private transient volatile Map<Class<? extends Annotation>, Annotation> declaredAnnotations;
 594 
 595     private Map<Class<? extends Annotation>, Annotation> declaredAnnotations() {
 596         Map<Class<? extends Annotation>, Annotation> declAnnos;
 597         if ((declAnnos = declaredAnnotations) == null) {
 598             synchronized (this) {
 599                 if ((declAnnos = declaredAnnotations) == null) {
 600                     Executable root = getRoot();
 601                     if (root != null) {
 602                         declAnnos = root.declaredAnnotations();
 603                     } else {
 604                         declAnnos = AnnotationParser.parseAnnotations(
 605                                 getAnnotationBytes(),
 606                                 SharedSecrets.getJavaLangAccess().
 607                                         getConstantPool(getDeclaringClass()),
 608                                 getDeclaringClass()
 609                         );
 610                     }
 611                     declaredAnnotations = declAnnos;
 612                 }
 613             }
 614         }
 615         return declAnnos;
 616     }
 617 
 618     /**
 619      * Returns an {@code AnnotatedType} object that represents the use of a type to
 620      * specify the return type of the method/constructor represented by this
 621      * Executable.
 622      *
 623      * If this {@code Executable} object represents a constructor, the {@code
 624      * AnnotatedType} object represents the type of the constructed object.
 625      *
 626      * If this {@code Executable} object represents a method, the {@code
 627      * AnnotatedType} object represents the use of a type to specify the return
 628      * type of the method.
 629      *
 630      * @return an object representing the return type of the method
 631      * or constructor represented by this {@code Executable}
 632      */
 633     public abstract AnnotatedType getAnnotatedReturnType();
 634 
 635     /* Helper for subclasses of Executable.
 636      *
 637      * Returns an AnnotatedType object that represents the use of a type to
 638      * specify the return type of the method/constructor represented by this
 639      * Executable.
 640      */
 641     AnnotatedType getAnnotatedReturnType0(Type returnType) {
 642         return TypeAnnotationParser.buildAnnotatedType(getTypeAnnotationBytes0(),
 643                 SharedSecrets.getJavaLangAccess().
 644                         getConstantPool(getDeclaringClass()),
 645                 this,
 646                 getDeclaringClass(),
 647                 returnType,
 648                 TypeAnnotation.TypeAnnotationTarget.METHOD_RETURN);
 649     }
 650 
 651     /**
 652      * Returns an {@code AnnotatedType} object that represents the use of a
 653      * type to specify the receiver type of the method/constructor represented
 654      * by this {@code Executable} object.
 655      *
 656      * The receiver type of a method/constructor is available only if the
 657      * method/constructor has a receiver parameter (JLS 8.4.1). If this {@code
 658      * Executable} object <em>represents an instance method or represents a
 659      * constructor of an inner member class</em>, and the
 660      * method/constructor <em>either</em> has no receiver parameter or has a
 661      * receiver parameter with no annotations on its type, then the return
 662      * value is an {@code AnnotatedType} object representing an element with no
 663      * annotations.
 664      *
 665      * If this {@code Executable} object represents a static method or
 666      * represents a constructor of a top level, static member, local, or
 667      * anonymous class, then the return value is null.
 668      *
 669      * @return an object representing the receiver type of the method or
 670      * constructor represented by this {@code Executable} or {@code null} if
 671      * this {@code Executable} can not have a receiver parameter
 672      */
 673     public AnnotatedType getAnnotatedReceiverType() {
 674         if (Modifier.isStatic(this.getModifiers()))
 675             return null;
 676         return TypeAnnotationParser.buildAnnotatedType(getTypeAnnotationBytes0(),
 677                 SharedSecrets.getJavaLangAccess().
 678                         getConstantPool(getDeclaringClass()),
 679                 this,
 680                 getDeclaringClass(),
 681                 getDeclaringClass(),
 682                 TypeAnnotation.TypeAnnotationTarget.METHOD_RECEIVER);
 683     }
 684 
 685     /**
 686      * Returns an array of {@code AnnotatedType} objects that represent the use
 687      * of types to specify formal parameter types of the method/constructor
 688      * represented by this Executable. The order of the objects in the array
 689      * corresponds to the order of the formal parameter types in the
 690      * declaration of the method/constructor.
 691      *
 692      * Returns an array of length 0 if the method/constructor declares no
 693      * parameters.
 694      *
 695      * @return an array of objects representing the types of the
 696      * formal parameters of the method or constructor represented by this
 697      * {@code Executable}
 698      */
 699     public AnnotatedType[] getAnnotatedParameterTypes() {
 700         return TypeAnnotationParser.buildAnnotatedTypes(getTypeAnnotationBytes0(),
 701                 SharedSecrets.getJavaLangAccess().
 702                         getConstantPool(getDeclaringClass()),
 703                 this,
 704                 getDeclaringClass(),
 705                 getAllGenericParameterTypes(),
 706                 TypeAnnotation.TypeAnnotationTarget.METHOD_FORMAL_PARAMETER);
 707     }
 708 
 709     /**
 710      * Returns an array of {@code AnnotatedType} objects that represent the use
 711      * of types to specify the declared exceptions of the method/constructor
 712      * represented by this Executable. The order of the objects in the array
 713      * corresponds to the order of the exception types in the declaration of
 714      * the method/constructor.
 715      *
 716      * Returns an array of length 0 if the method/constructor declares no
 717      * exceptions.
 718      *
 719      * @return an array of objects representing the declared
 720      * exceptions of the method or constructor represented by this {@code
 721      * Executable}
 722      */
 723     public AnnotatedType[] getAnnotatedExceptionTypes() {
 724         return TypeAnnotationParser.buildAnnotatedTypes(getTypeAnnotationBytes0(),
 725                 SharedSecrets.getJavaLangAccess().
 726                         getConstantPool(getDeclaringClass()),
 727                 this,
 728                 getDeclaringClass(),
 729                 getGenericExceptionTypes(),
 730                 TypeAnnotation.TypeAnnotationTarget.THROWS);
 731     }
 732 
 733 }
--- EOF ---