diff -r 000000000000 -r 959103a6100f src/share/classes/javax/lang/model/util/TypeKindVisitor6.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/classes/javax/lang/model/util/TypeKindVisitor6.java Wed Apr 27 01:34:52 2016 +0800 @@ -0,0 +1,310 @@ +/* + * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package javax.lang.model.util; + +import javax.annotation.processing.SupportedSourceVersion; +import javax.lang.model.SourceVersion; +import javax.lang.model.type.*; +import static javax.lang.model.SourceVersion.*; + +/** + * A visitor of types based on their {@linkplain TypeKind kind} with + * default behavior appropriate for the {@link SourceVersion#RELEASE_6 + * RELEASE_6} source version. For {@linkplain + * TypeMirror types} XYZ that may have more than one + * kind, the visitXYZ methods in this class delegate + * to the visitXYZKind method corresponding to the + * first argument's kind. The visitXYZKind methods + * call {@link #defaultAction defaultAction}, passing their arguments + * to {@code defaultAction}'s corresponding parameters. + * + *

Methods in this class may be overridden subject to their + * general contract. Note that annotating methods in concrete + * subclasses with {@link java.lang.Override @Override} will help + * ensure that methods are overridden as intended. + * + *

WARNING: The {@code TypeVisitor} interface implemented + * by this class may have methods added to it in the future to + * accommodate new, currently unknown, language structures added to + * future versions of the Java™ programming language. + * Therefore, methods whose names begin with {@code "visit"} may be + * added to this class in the future; to avoid incompatibilities, + * classes which extend this class should not declare any instance + * methods with names beginning with {@code "visit"}. + * + *

When such a new visit method is added, the default + * implementation in this class will be to call the {@link + * #visitUnknown visitUnknown} method. A new type kind visitor class + * will also be introduced to correspond to the new language level; + * this visitor will have different default behavior for the visit + * method in question. When the new visitor is introduced, all or + * portions of this visitor may be deprecated. + * + *

Note that adding a default implementation of a new visit method + * in a visitor class will occur instead of adding a default + * method directly in the visitor interface since a Java SE 8 + * language feature cannot be used to this version of the API since + * this version is required to be runnable on Java SE 7 + * implementations. Future versions of the API that are only required + * to run on Java SE 8 and later may take advantage of default methods + * in this situation. + * + * @param the return type of this visitor's methods. Use {@link + * Void} for visitors that do not need to return results. + * @param

the type of the additional parameter to this visitor's + * methods. Use {@code Void} for visitors that do not need an + * additional parameter. + * + * @author Joseph D. Darcy + * @author Scott Seligman + * @author Peter von der Ahé + * + * @see TypeKindVisitor7 + * @see TypeKindVisitor8 + * @since 1.6 + */ +@SupportedSourceVersion(RELEASE_6) +public class TypeKindVisitor6 extends SimpleTypeVisitor6 { + /** + * Constructor for concrete subclasses to call; uses {@code null} + * for the default value. + */ + protected TypeKindVisitor6() { + super(null); + } + + + /** + * Constructor for concrete subclasses to call; uses the argument + * for the default value. + * + * @param defaultValue the value to assign to {@link #DEFAULT_VALUE} + */ + protected TypeKindVisitor6(R defaultValue) { + super(defaultValue); + } + + /** + * Visits a primitive type, dispatching to the visit method for + * the specific {@linkplain TypeKind kind} of primitive type: + * {@code BOOLEAN}, {@code BYTE}, etc. + * + * @param t {@inheritDoc} + * @param p {@inheritDoc} + * @return the result of the kind-specific visit method + */ + @Override + public R visitPrimitive(PrimitiveType t, P p) { + TypeKind k = t.getKind(); + switch (k) { + case BOOLEAN: + return visitPrimitiveAsBoolean(t, p); + + case BYTE: + return visitPrimitiveAsByte(t, p); + + case SHORT: + return visitPrimitiveAsShort(t, p); + + case INT: + return visitPrimitiveAsInt(t, p); + + case LONG: + return visitPrimitiveAsLong(t, p); + + case CHAR: + return visitPrimitiveAsChar(t, p); + + case FLOAT: + return visitPrimitiveAsFloat(t, p); + + case DOUBLE: + return visitPrimitiveAsDouble(t, p); + + default: + throw new AssertionError("Bad kind " + k + " for PrimitiveType" + t); + } + } + + /** + * Visits a {@code BOOLEAN} primitive type by calling + * {@code defaultAction}. + * + * @param t the type to visit + * @param p a visitor-specified parameter + * @return the result of {@code defaultAction} + */ + public R visitPrimitiveAsBoolean(PrimitiveType t, P p) { + return defaultAction(t, p); + } + + /** + * Visits a {@code BYTE} primitive type by calling + * {@code defaultAction}. + * + * @param t the type to visit + * @param p a visitor-specified parameter + * @return the result of {@code defaultAction} + */ + public R visitPrimitiveAsByte(PrimitiveType t, P p) { + return defaultAction(t, p); + } + + /** + * Visits a {@code SHORT} primitive type by calling + * {@code defaultAction}. + * + * @param t the type to visit + * @param p a visitor-specified parameter + * @return the result of {@code defaultAction} + */ + public R visitPrimitiveAsShort(PrimitiveType t, P p) { + return defaultAction(t, p); + } + + /** + * Visits an {@code INT} primitive type by calling + * {@code defaultAction}. + * + * @param t the type to visit + * @param p a visitor-specified parameter + * @return the result of {@code defaultAction} + */ + public R visitPrimitiveAsInt(PrimitiveType t, P p) { + return defaultAction(t, p); + } + + /** + * Visits a {@code LONG} primitive type by calling + * {@code defaultAction}. + * + * @param t the type to visit + * @param p a visitor-specified parameter + * @return the result of {@code defaultAction} + */ + public R visitPrimitiveAsLong(PrimitiveType t, P p) { + return defaultAction(t, p); + } + + /** + * Visits a {@code CHAR} primitive type by calling + * {@code defaultAction}. + * + * @param t the type to visit + * @param p a visitor-specified parameter + * @return the result of {@code defaultAction} + */ + public R visitPrimitiveAsChar(PrimitiveType t, P p) { + return defaultAction(t, p); + } + + /** + * Visits a {@code FLOAT} primitive type by calling + * {@code defaultAction}. + * + * @param t the type to visit + * @param p a visitor-specified parameter + * @return the result of {@code defaultAction} + */ + public R visitPrimitiveAsFloat(PrimitiveType t, P p) { + return defaultAction(t, p); + } + + /** + * Visits a {@code DOUBLE} primitive type by calling + * {@code defaultAction}. + * + * @param t the type to visit + * @param p a visitor-specified parameter + * @return the result of {@code defaultAction} + */ + public R visitPrimitiveAsDouble(PrimitiveType t, P p) { + return defaultAction(t, p); + } + + /** + * Visits a {@link NoType} instance, dispatching to the visit method for + * the specific {@linkplain TypeKind kind} of pseudo-type: + * {@code VOID}, {@code PACKAGE}, or {@code NONE}. + * + * @param t {@inheritDoc} + * @param p {@inheritDoc} + * @return the result of the kind-specific visit method + */ + @Override + public R visitNoType(NoType t, P p) { + TypeKind k = t.getKind(); + switch (k) { + case VOID: + return visitNoTypeAsVoid(t, p); + + case PACKAGE: + return visitNoTypeAsPackage(t, p); + + case NONE: + return visitNoTypeAsNone(t, p); + + default: + throw new AssertionError("Bad kind " + k + " for NoType" + t); + } + } + + /** + * Visits a {@link TypeKind#VOID VOID} pseudo-type by calling + * {@code defaultAction}. + * + * @param t the type to visit + * @param p a visitor-specified parameter + * @return the result of {@code defaultAction} + */ + public R visitNoTypeAsVoid(NoType t, P p) { + return defaultAction(t, p); + } + + /** + * Visits a {@link TypeKind#PACKAGE PACKAGE} pseudo-type by calling + * {@code defaultAction}. + * + * @param t the type to visit + * @param p a visitor-specified parameter + * @return the result of {@code defaultAction} + */ + public R visitNoTypeAsPackage(NoType t, P p) { + return defaultAction(t, p); + } + + /** + * Visits a {@link TypeKind#NONE NONE} pseudo-type by calling + * {@code defaultAction}. + * + * @param t the type to visit + * @param p a visitor-specified parameter + * @return the result of {@code defaultAction} + */ + public R visitNoTypeAsNone(NoType t, P p) { + return defaultAction(t, p); + } +}