src/share/classes/javax/lang/model/util/SimpleTypeVisitor6.java

Tue, 05 Jul 2011 16:37:24 -0700

author
darcy
date
Tue, 05 Jul 2011 16:37:24 -0700
changeset 1054
111bbf1ad913
parent 851
cad51b6eb7a6
child 1522
09f65aad4759
permissions
-rw-r--r--

7025809: Provided new utility visitors supporting SourceVersion.RELEASE_8
Reviewed-by: jjg, mcimadamore

duke@1 1 /*
darcy@851 2 * Copyright (c) 2005, 2011, 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.type.*;
duke@1 29 import javax.annotation.processing.SupportedSourceVersion;
duke@1 30 import javax.lang.model.SourceVersion;
duke@1 31 import static javax.lang.model.SourceVersion.*;
duke@1 32
duke@1 33
duke@1 34 /**
duke@1 35 * A simple visitor of types with default behavior appropriate for the
duke@1 36 * {@link SourceVersion#RELEASE_6 RELEASE_6} source version.
duke@1 37 *
duke@1 38 * Visit methods corresponding to {@code RELEASE_6} language
darcy@851 39 * constructs call {@link #defaultAction defaultAction}, passing their
darcy@851 40 * arguments to {@code defaultAction}'s corresponding parameters.
darcy@851 41 *
darcy@851 42 * For constructs introduced in {@code RELEASE_7} and later, {@code
darcy@851 43 * visitUnknown} is called instead.
duke@1 44 *
duke@1 45 * <p> Methods in this class may be overridden subject to their
duke@1 46 * general contract. Note that annotating methods in concrete
duke@1 47 * subclasses with {@link java.lang.Override @Override} will help
duke@1 48 * ensure that methods are overridden as intended.
duke@1 49 *
duke@1 50 * <p> <b>WARNING:</b> The {@code TypeVisitor} interface implemented
duke@1 51 * by this class may have methods added to it in the future to
duke@1 52 * accommodate new, currently unknown, language structures added to
duke@1 53 * future versions of the Java&trade; programming language.
duke@1 54 * Therefore, methods whose names begin with {@code "visit"} may be
duke@1 55 * added to this class in the future; to avoid incompatibilities,
duke@1 56 * classes which extend this class should not declare any instance
duke@1 57 * methods with names beginning with {@code "visit"}.
duke@1 58 *
duke@1 59 * <p>When such a new visit method is added, the default
duke@1 60 * implementation in this class will be to call the {@link
duke@1 61 * #visitUnknown visitUnknown} method. A new simple type visitor
duke@1 62 * class will also be introduced to correspond to the new language
duke@1 63 * level; this visitor will have different default behavior for the
duke@1 64 * visit method in question. When the new visitor is introduced, all
duke@1 65 * or portions of this visitor may be deprecated.
duke@1 66 *
duke@1 67 * @param <R> the return type of this visitor's methods. Use {@link
duke@1 68 * Void} for visitors that do not need to return results.
duke@1 69 * @param <P> the type of the additional parameter to this visitor's
duke@1 70 * methods. Use {@code Void} for visitors that do not need an
duke@1 71 * additional parameter.
duke@1 72 *
duke@1 73 * @author Joseph D. Darcy
duke@1 74 * @author Scott Seligman
duke@1 75 * @author Peter von der Ah&eacute;
darcy@575 76 *
darcy@575 77 * @see SimpleTypeVisitor7
darcy@1054 78 * @see SimpleTypeVisitor8
duke@1 79 * @since 1.6
duke@1 80 */
duke@1 81 @SupportedSourceVersion(RELEASE_6)
duke@1 82 public class SimpleTypeVisitor6<R, P> extends AbstractTypeVisitor6<R, P> {
duke@1 83 /**
duke@1 84 * Default value to be returned; {@link #defaultAction
duke@1 85 * defaultAction} returns this value unless the method is
duke@1 86 * overridden.
duke@1 87 */
duke@1 88 protected final R DEFAULT_VALUE;
duke@1 89
duke@1 90 /**
duke@1 91 * Constructor for concrete subclasses; uses {@code null} for the
duke@1 92 * default value.
duke@1 93 */
duke@1 94 protected SimpleTypeVisitor6(){
duke@1 95 DEFAULT_VALUE = null;
duke@1 96 }
duke@1 97
duke@1 98 /**
duke@1 99 * Constructor for concrete subclasses; uses the argument for the
duke@1 100 * default value.
duke@1 101 *
duke@1 102 * @param defaultValue the value to assign to {@link #DEFAULT_VALUE}
duke@1 103 */
duke@1 104 protected SimpleTypeVisitor6(R defaultValue){
duke@1 105 DEFAULT_VALUE = defaultValue;
duke@1 106 }
duke@1 107
duke@1 108 /**
duke@1 109 * The default action for visit methods. The implementation in
duke@1 110 * this class just returns {@link #DEFAULT_VALUE}; subclasses will
duke@1 111 * commonly override this method.
duke@1 112 */
duke@1 113 protected R defaultAction(TypeMirror e, P p) {
duke@1 114 return DEFAULT_VALUE;
duke@1 115 }
duke@1 116
duke@1 117 /**
duke@1 118 * {@inheritDoc} This implementation calls {@code defaultAction}.
duke@1 119 *
duke@1 120 * @param t {@inheritDoc}
duke@1 121 * @param p {@inheritDoc}
duke@1 122 * @return the result of {@code defaultAction}
duke@1 123 */
duke@1 124 public R visitPrimitive(PrimitiveType t, P p) {
duke@1 125 return defaultAction(t, p);
duke@1 126 }
duke@1 127
duke@1 128 /**
duke@1 129 * {@inheritDoc} This implementation calls {@code defaultAction}.
duke@1 130 *
duke@1 131 * @param t {@inheritDoc}
duke@1 132 * @param p {@inheritDoc}
duke@1 133 * @return the result of {@code defaultAction}
duke@1 134 */
duke@1 135 public R visitNull(NullType t, P p){
duke@1 136 return defaultAction(t, p);
duke@1 137 }
duke@1 138
duke@1 139 /**
duke@1 140 * {@inheritDoc} This implementation calls {@code defaultAction}.
duke@1 141 *
duke@1 142 * @param t {@inheritDoc}
duke@1 143 * @param p {@inheritDoc}
duke@1 144 * @return the result of {@code defaultAction}
duke@1 145 */
duke@1 146 public R visitArray(ArrayType t, P p){
duke@1 147 return defaultAction(t, p);
duke@1 148 }
duke@1 149
duke@1 150 /**
duke@1 151 * {@inheritDoc} This implementation calls {@code defaultAction}.
duke@1 152 *
duke@1 153 * @param t {@inheritDoc}
duke@1 154 * @param p {@inheritDoc}
duke@1 155 * @return the result of {@code defaultAction}
duke@1 156 */
duke@1 157 public R visitDeclared(DeclaredType t, P p){
duke@1 158 return defaultAction(t, p);
duke@1 159 }
duke@1 160
duke@1 161 /**
duke@1 162 * {@inheritDoc} This implementation calls {@code defaultAction}.
duke@1 163 *
duke@1 164 * @param t {@inheritDoc}
duke@1 165 * @param p {@inheritDoc}
duke@1 166 * @return the result of {@code defaultAction}
duke@1 167 */
duke@1 168 public R visitError(ErrorType t, P p){
duke@1 169 return defaultAction(t, p);
duke@1 170 }
duke@1 171
duke@1 172 /**
duke@1 173 * {@inheritDoc} This implementation calls {@code defaultAction}.
duke@1 174 *
duke@1 175 * @param t {@inheritDoc}
duke@1 176 * @param p {@inheritDoc}
duke@1 177 * @return the result of {@code defaultAction}
duke@1 178 */
duke@1 179 public R visitTypeVariable(TypeVariable t, P p){
duke@1 180 return defaultAction(t, p);
duke@1 181 }
duke@1 182
duke@1 183 /**
duke@1 184 * {@inheritDoc} This implementation calls {@code defaultAction}.
duke@1 185 *
duke@1 186 * @param t {@inheritDoc}
duke@1 187 * @param p {@inheritDoc}
duke@1 188 * @return the result of {@code defaultAction}
duke@1 189 */
duke@1 190 public R visitWildcard(WildcardType t, P p){
duke@1 191 return defaultAction(t, p);
duke@1 192 }
duke@1 193
duke@1 194 /**
duke@1 195 * {@inheritDoc} This implementation calls {@code defaultAction}.
duke@1 196 *
duke@1 197 * @param t {@inheritDoc}
duke@1 198 * @param p {@inheritDoc}
duke@1 199 * @return the result of {@code defaultAction}
duke@1 200 */
duke@1 201 public R visitExecutable(ExecutableType t, P p) {
duke@1 202 return defaultAction(t, p);
duke@1 203 }
duke@1 204
duke@1 205 /**
duke@1 206 * {@inheritDoc} This implementation calls {@code defaultAction}.
duke@1 207 *
duke@1 208 * @param t {@inheritDoc}
duke@1 209 * @param p {@inheritDoc}
duke@1 210 * @return the result of {@code defaultAction}
duke@1 211 */
duke@1 212 public R visitNoType(NoType t, P p){
duke@1 213 return defaultAction(t, p);
duke@1 214 }
duke@1 215 }

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