src/share/classes/javax/lang/model/util/ElementKindVisitor6.java

Tue, 28 Dec 2010 15:54:52 -0800

author
ohair
date
Tue, 28 Dec 2010 15:54:52 -0800
changeset 798
4868a36f6fd8
parent 575
9a7c998bf2fc
child 851
cad51b6eb7a6
permissions
-rw-r--r--

6962318: Update copyright year
Reviewed-by: xdono

duke@1 1 /*
ohair@798 2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
duke@1 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1 4 *
duke@1 5 * This code is free software; you can redistribute it and/or modify it
duke@1 6 * under the terms of the GNU General Public License version 2 only, as
ohair@554 7 * published by the Free Software Foundation. Oracle designates this
duke@1 8 * particular file as subject to the "Classpath" exception as provided
ohair@554 9 * by Oracle in the LICENSE file that accompanied this code.
duke@1 10 *
duke@1 11 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@1 14 * version 2 for more details (a copy is included in the LICENSE file that
duke@1 15 * accompanied this code).
duke@1 16 *
duke@1 17 * You should have received a copy of the GNU General Public License version
duke@1 18 * 2 along with this work; if not, write to the Free Software Foundation,
duke@1 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1 20 *
ohair@554 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@554 22 * or visit www.oracle.com if you need additional information or have any
ohair@554 23 * questions.
duke@1 24 */
duke@1 25
duke@1 26 package javax.lang.model.util;
duke@1 27
duke@1 28 import javax.lang.model.element.*;
duke@1 29 import static javax.lang.model.element.ElementKind.*;
duke@1 30 import javax.annotation.processing.SupportedSourceVersion;
duke@1 31 import static javax.lang.model.SourceVersion.*;
duke@1 32 import javax.lang.model.SourceVersion;
duke@1 33
duke@1 34
duke@1 35 /**
duke@1 36 * A visitor of program elements based on their {@linkplain
duke@1 37 * ElementKind kind} with default behavior appropriate for the {@link
duke@1 38 * SourceVersion#RELEASE_6 RELEASE_6} source version. For {@linkplain
duke@1 39 * Element elements} <tt><i>XYZ</i></tt> that may have more than one
duke@1 40 * kind, the <tt>visit<i>XYZ</i></tt> methods in this class delegate
duke@1 41 * to the <tt>visit<i>XYZKind</i></tt> method corresponding to the
duke@1 42 * first argument's kind. The <tt>visit<i>XYZKind</i></tt> methods
duke@1 43 * call {@link #defaultAction defaultAction}, passing their arguments
duke@1 44 * to {@code defaultAction}'s corresponding parameters.
duke@1 45 *
duke@1 46 * <p> Methods in this class may be overridden subject to their
duke@1 47 * general contract. Note that annotating methods in concrete
duke@1 48 * subclasses with {@link java.lang.Override @Override} will help
duke@1 49 * ensure that methods are overridden as intended.
duke@1 50 *
duke@1 51 * <p> <b>WARNING:</b> The {@code ElementVisitor} interface
duke@1 52 * implemented by this class may have methods added to it or the
duke@1 53 * {@code ElementKind} {@code enum} used in this case may have
duke@1 54 * constants added to it in the future to accommodate new, currently
duke@1 55 * unknown, language structures added to future versions of the
duke@1 56 * Java&trade; programming language. Therefore, methods whose names
duke@1 57 * begin with {@code "visit"} may be added to this class in the
duke@1 58 * future; to avoid incompatibilities, classes which extend this class
duke@1 59 * should not declare any instance methods with names beginning with
duke@1 60 * {@code "visit"}.
duke@1 61 *
duke@1 62 * <p>When such a new visit method is added, the default
duke@1 63 * implementation in this class will be to call the {@link
duke@1 64 * #visitUnknown visitUnknown} method. A new abstract element kind
duke@1 65 * visitor class will also be introduced to correspond to the new
duke@1 66 * language level; this visitor will have different default behavior
duke@1 67 * for the visit method in question. When the new visitor is
duke@1 68 * introduced, all or portions of this visitor may be deprecated.
duke@1 69 *
duke@1 70 * @param <R> the return type of this visitor's methods. Use {@link
duke@1 71 * Void} for visitors that do not need to return results.
duke@1 72 * @param <P> the type of the additional parameter to this visitor's
duke@1 73 * methods. Use {@code Void} for visitors that do not need an
duke@1 74 * additional parameter.
duke@1 75 *
duke@1 76 * @author Joseph D. Darcy
duke@1 77 * @author Scott Seligman
duke@1 78 * @author Peter von der Ah&eacute;
darcy@575 79 *
darcy@575 80 * @see ElementKindVisitor7
duke@1 81 * @since 1.6
duke@1 82 */
duke@1 83 @SupportedSourceVersion(RELEASE_6)
duke@1 84 public class ElementKindVisitor6<R, P>
duke@1 85 extends SimpleElementVisitor6<R, P> {
duke@1 86 /**
duke@1 87 * Constructor for concrete subclasses; uses {@code null} for the
duke@1 88 * default value.
duke@1 89 */
duke@1 90 protected ElementKindVisitor6() {
duke@1 91 super(null);
duke@1 92 }
duke@1 93
duke@1 94 /**
duke@1 95 * Constructor for concrete subclasses; uses the argument for the
duke@1 96 * default value.
duke@1 97 *
duke@1 98 * @param defaultValue the value to assign to {@link #DEFAULT_VALUE}
duke@1 99 */
duke@1 100 protected ElementKindVisitor6(R defaultValue) {
duke@1 101 super(defaultValue);
duke@1 102 }
duke@1 103
duke@1 104 /**
duke@1 105 * {@inheritDoc}
duke@1 106 *
duke@1 107 * The element argument has kind {@code PACKAGE}.
duke@1 108 *
duke@1 109 * @param e {@inheritDoc}
duke@1 110 * @param p {@inheritDoc}
duke@1 111 * @return {@inheritDoc}
duke@1 112 */
duke@1 113 @Override
duke@1 114 public R visitPackage(PackageElement e, P p) {
duke@1 115 assert e.getKind() == PACKAGE: "Bad kind on PackageElement";
duke@1 116 return defaultAction(e, p);
duke@1 117 }
duke@1 118
duke@1 119 /**
duke@1 120 * Visits a type element, dispatching to the visit method for the
duke@1 121 * specific {@linkplain ElementKind kind} of type, {@code
duke@1 122 * ANNOTATION_TYPE}, {@code CLASS}, {@code ENUM}, or {@code
duke@1 123 * INTERFACE}.
duke@1 124 *
duke@1 125 * @param e {@inheritDoc}
duke@1 126 * @param p {@inheritDoc}
duke@1 127 * @return the result of the kind-specific visit method
duke@1 128 */
duke@1 129 @Override
duke@1 130 public R visitType(TypeElement e, P p) {
duke@1 131 ElementKind k = e.getKind();
duke@1 132 switch(k) {
duke@1 133 case ANNOTATION_TYPE:
duke@1 134 return visitTypeAsAnnotationType(e, p);
duke@1 135
duke@1 136 case CLASS:
duke@1 137 return visitTypeAsClass(e, p);
duke@1 138
duke@1 139 case ENUM:
duke@1 140 return visitTypeAsEnum(e, p);
duke@1 141
duke@1 142 case INTERFACE:
duke@1 143 return visitTypeAsInterface(e, p);
duke@1 144
duke@1 145 default:
duke@1 146 throw new AssertionError("Bad kind " + k + " for TypeElement" + e);
duke@1 147 }
duke@1 148 }
duke@1 149
duke@1 150 /**
duke@1 151 * Visits an {@code ANNOTATION_TYPE} type element by calling
duke@1 152 * {@code defaultAction}.
duke@1 153 *
duke@1 154 * @param e the element to visit
duke@1 155 * @param p a visitor-specified parameter
duke@1 156 * @return the result of {@code defaultAction}
duke@1 157 */
duke@1 158 public R visitTypeAsAnnotationType(TypeElement e, P p) {
duke@1 159 return defaultAction(e, p);
duke@1 160 }
duke@1 161
duke@1 162 /**
duke@1 163 * Visits a {@code CLASS} type element by calling {@code
duke@1 164 * defaultAction}.
duke@1 165 *
duke@1 166 * @param e the element to visit
duke@1 167 * @param p a visitor-specified parameter
duke@1 168 * @return the result of {@code defaultAction}
duke@1 169 */
duke@1 170 public R visitTypeAsClass(TypeElement e, P p) {
duke@1 171 return defaultAction(e, p);
duke@1 172 }
duke@1 173
duke@1 174 /**
duke@1 175 * Visits an {@code ENUM} type element by calling {@code
duke@1 176 * defaultAction}.
duke@1 177 *
duke@1 178 * @param e the element to visit
duke@1 179 * @param p a visitor-specified parameter
duke@1 180 * @return the result of {@code defaultAction}
duke@1 181 */
duke@1 182 public R visitTypeAsEnum(TypeElement e, P p) {
duke@1 183 return defaultAction(e, p);
duke@1 184 }
duke@1 185
duke@1 186 /**
duke@1 187 * Visits an {@code INTERFACE} type element by calling {@code
duke@1 188 * defaultAction}.
duke@1 189 *.
duke@1 190 * @param e the element to visit
duke@1 191 * @param p a visitor-specified parameter
duke@1 192 * @return the result of {@code defaultAction}
duke@1 193 */
duke@1 194 public R visitTypeAsInterface(TypeElement e, P p) {
duke@1 195 return defaultAction(e, p);
duke@1 196 }
duke@1 197
duke@1 198 /**
duke@1 199 * Visits a variable element, dispatching to the visit method for
duke@1 200 * the specific {@linkplain ElementKind kind} of variable, {@code
duke@1 201 * ENUM_CONSTANT}, {@code EXCEPTION_PARAMETER}, {@code FIELD},
duke@1 202 * {@code LOCAL_VARIABLE}, or {@code PARAMETER}.
duke@1 203 * @param e {@inheritDoc}
duke@1 204 * @param p {@inheritDoc}
duke@1 205 * @return the result of the kind-specific visit method
duke@1 206 */
duke@1 207 @Override
duke@1 208 public R visitVariable(VariableElement e, P p) {
duke@1 209 ElementKind k = e.getKind();
duke@1 210 switch(k) {
duke@1 211 case ENUM_CONSTANT:
duke@1 212 return visitVariableAsEnumConstant(e, p);
duke@1 213
duke@1 214 case EXCEPTION_PARAMETER:
duke@1 215 return visitVariableAsExceptionParameter(e, p);
duke@1 216
duke@1 217 case FIELD:
duke@1 218 return visitVariableAsField(e, p);
duke@1 219
duke@1 220 case LOCAL_VARIABLE:
duke@1 221 return visitVariableAsLocalVariable(e, p);
duke@1 222
duke@1 223 case PARAMETER:
duke@1 224 return visitVariableAsParameter(e, p);
duke@1 225
duke@1 226 default:
duke@1 227 throw new AssertionError("Bad kind " + k + " for VariableElement" + e);
duke@1 228 }
duke@1 229
duke@1 230 }
duke@1 231
duke@1 232 /**
duke@1 233 * Visits an {@code ENUM_CONSTANT} variable element by calling
duke@1 234 * {@code defaultAction}.
duke@1 235 *
duke@1 236 * @param e the element to visit
duke@1 237 * @param p a visitor-specified parameter
duke@1 238 * @return the result of {@code defaultAction}
duke@1 239 */
duke@1 240 public R visitVariableAsEnumConstant(VariableElement e, P p) {
duke@1 241 return defaultAction(e, p);
duke@1 242 }
duke@1 243
duke@1 244 /**
duke@1 245 * Visits an {@code EXCEPTION_PARAMETER} variable element by calling
duke@1 246 * {@code defaultAction}.
duke@1 247 *
duke@1 248 * @param e the element to visit
duke@1 249 * @param p a visitor-specified parameter
duke@1 250 * @return the result of {@code defaultAction}
duke@1 251 */
duke@1 252 public R visitVariableAsExceptionParameter(VariableElement e, P p) {
duke@1 253 return defaultAction(e, p);
duke@1 254 }
duke@1 255
duke@1 256 /**
duke@1 257 * Visits a {@code FIELD} variable element by calling
duke@1 258 * {@code defaultAction}.
duke@1 259 *
duke@1 260 * @param e the element to visit
duke@1 261 * @param p a visitor-specified parameter
duke@1 262 * @return the result of {@code defaultAction}
duke@1 263 */
duke@1 264 public R visitVariableAsField(VariableElement e, P p) {
duke@1 265 return defaultAction(e, p);
duke@1 266 }
duke@1 267
duke@1 268 /**
duke@1 269 * Visits a {@code LOCAL_VARIABLE} variable element by calling
duke@1 270 * {@code defaultAction}.
duke@1 271 *
duke@1 272 * @param e the element to visit
duke@1 273 * @param p a visitor-specified parameter
duke@1 274 * @return the result of {@code defaultAction}
duke@1 275 */
duke@1 276 public R visitVariableAsLocalVariable(VariableElement e, P p) {
duke@1 277 return defaultAction(e, p);
duke@1 278 }
duke@1 279
duke@1 280 /**
duke@1 281 * Visits a {@code PARAMETER} variable element by calling
duke@1 282 * {@code defaultAction}.
duke@1 283 *
duke@1 284 * @param e the element to visit
duke@1 285 * @param p a visitor-specified parameter
duke@1 286 * @return the result of {@code defaultAction}
duke@1 287 */
duke@1 288 public R visitVariableAsParameter(VariableElement e, P p) {
duke@1 289 return defaultAction(e, p);
duke@1 290 }
duke@1 291
duke@1 292 /**
duke@1 293 * Visits an executable element, dispatching to the visit method
duke@1 294 * for the specific {@linkplain ElementKind kind} of executable,
duke@1 295 * {@code CONSTRUCTOR}, {@code INSTANCE_INIT}, {@code METHOD}, or
duke@1 296 * {@code STATIC_INIT}.
duke@1 297 *
duke@1 298 * @param e {@inheritDoc}
duke@1 299 * @param p {@inheritDoc}
duke@1 300 * @return the result of the kind-specific visit method
duke@1 301 */
duke@1 302 @Override
duke@1 303 public R visitExecutable(ExecutableElement e, P p) {
duke@1 304 ElementKind k = e.getKind();
duke@1 305 switch(k) {
duke@1 306 case CONSTRUCTOR:
duke@1 307 return visitExecutableAsConstructor(e, p);
duke@1 308
duke@1 309 case INSTANCE_INIT:
duke@1 310 return visitExecutableAsInstanceInit(e, p);
duke@1 311
duke@1 312 case METHOD:
duke@1 313 return visitExecutableAsMethod(e, p);
duke@1 314
duke@1 315 case STATIC_INIT:
duke@1 316 return visitExecutableAsStaticInit(e, p);
duke@1 317
duke@1 318 default:
duke@1 319 throw new AssertionError("Bad kind " + k + " for ExecutableElement" + e);
duke@1 320 }
duke@1 321 }
duke@1 322
duke@1 323 /**
duke@1 324 * Visits a {@code CONSTRUCTOR} executable element by calling
duke@1 325 * {@code defaultAction}.
duke@1 326 *
duke@1 327 * @param e the element to visit
duke@1 328 * @param p a visitor-specified parameter
duke@1 329 * @return the result of {@code defaultAction}
duke@1 330 */
duke@1 331 public R visitExecutableAsConstructor(ExecutableElement e, P p) {
duke@1 332 return defaultAction(e, p);
duke@1 333 }
duke@1 334
duke@1 335 /**
duke@1 336 * Visits an {@code INSTANCE_INIT} executable element by calling
duke@1 337 * {@code defaultAction}.
duke@1 338 *
duke@1 339 * @param e the element to visit
duke@1 340 * @param p a visitor-specified parameter
duke@1 341 * @return the result of {@code defaultAction}
duke@1 342 */
duke@1 343 public R visitExecutableAsInstanceInit(ExecutableElement e, P p) {
duke@1 344 return defaultAction(e, p);
duke@1 345 }
duke@1 346
duke@1 347 /**
duke@1 348 * Visits a {@code METHOD} executable element by calling
duke@1 349 * {@code defaultAction}.
duke@1 350 *
duke@1 351 * @param e the element to visit
duke@1 352 * @param p a visitor-specified parameter
duke@1 353 * @return the result of {@code defaultAction}
duke@1 354 */
duke@1 355 public R visitExecutableAsMethod(ExecutableElement e, P p) {
duke@1 356 return defaultAction(e, p);
duke@1 357 }
duke@1 358
duke@1 359 /**
duke@1 360 * Visits a {@code STATIC_INIT} executable element by calling
duke@1 361 * {@code defaultAction}.
duke@1 362 *
duke@1 363 * @param e the element to visit
duke@1 364 * @param p a visitor-specified parameter
duke@1 365 * @return the result of {@code defaultAction}
duke@1 366 */
duke@1 367 public R visitExecutableAsStaticInit(ExecutableElement e, P p) {
duke@1 368 return defaultAction(e, p);
duke@1 369 }
duke@1 370
duke@1 371
duke@1 372 /**
duke@1 373 * {@inheritDoc}
duke@1 374 *
duke@1 375 * The element argument has kind {@code TYPE_PARAMETER}.
duke@1 376 *
duke@1 377 * @param e {@inheritDoc}
duke@1 378 * @param p {@inheritDoc}
duke@1 379 * @return {@inheritDoc}
duke@1 380 */
duke@1 381 @Override
duke@1 382 public R visitTypeParameter(TypeParameterElement e, P p) {
duke@1 383 assert e.getKind() == TYPE_PARAMETER: "Bad kind on TypeParameterElement";
duke@1 384 return defaultAction(e, p);
duke@1 385 }
duke@1 386 }

mercurial