Mercurial > jdk8-mips64-public > langtools / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/share/classes/javax/lang/model/util/AbstractTypeVisitor7.java	Wed Apr 27 01:34:52 2016 +0800
     1.3 @@ -0,0 +1,87 @@
     1.4 +/*
     1.5 + * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.  Oracle designates this
    1.11 + * particular file as subject to the "Classpath" exception as provided
    1.12 + * by Oracle in the LICENSE file that accompanied this code.
    1.13 + *
    1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.16 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.17 + * version 2 for more details (a copy is included in the LICENSE file that
    1.18 + * accompanied this code).
    1.19 + *
    1.20 + * You should have received a copy of the GNU General Public License version
    1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.23 + *
    1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    1.25 + * or visit www.oracle.com if you need additional information or have any
    1.26 + * questions.
    1.27 + */
    1.28 +
    1.29 +package javax.lang.model.util;
    1.30 +
    1.31 +import javax.lang.model.type.*;
    1.32 +
    1.33 +/**
    1.34 + * A skeletal visitor of types with default behavior appropriate for
    1.35 + * the {@link javax.lang.model.SourceVersion#RELEASE_7 RELEASE_7}
    1.36 + * source version.
    1.37 + *
    1.38 + * <p> <b>WARNING:</b> The {@code TypeVisitor} interface implemented
    1.39 + * by this class may have methods added to it in the future to
    1.40 + * accommodate new, currently unknown, language structures added to
    1.41 + * future versions of the Java&trade; programming language.
    1.42 + * Therefore, methods whose names begin with {@code "visit"} may be
    1.43 + * added to this class in the future; to avoid incompatibilities,
    1.44 + * classes which extend this class should not declare any instance
    1.45 + * methods with names beginning with {@code "visit"}.
    1.46 + *
    1.47 + * <p>When such a new visit method is added, the default
    1.48 + * implementation in this class will be to call the {@link
    1.49 + * #visitUnknown visitUnknown} method.  A new abstract type visitor
    1.50 + * class will also be introduced to correspond to the new language
    1.51 + * level; this visitor will have different default behavior for the
    1.52 + * visit method in question.  When the new visitor is introduced, all
    1.53 + * or portions of this visitor may be deprecated.
    1.54 + *
    1.55 + * <p>Note that adding a default implementation of a new visit method
    1.56 + * in a visitor class will occur instead of adding a <em>default
    1.57 + * method</em> directly in the visitor interface since a Java SE 8
    1.58 + * language feature cannot be used to this version of the API since
    1.59 + * this version is required to be runnable on Java SE 7
    1.60 + * implementations.  Future versions of the API that are only required
    1.61 + * to run on Java SE 8 and later may take advantage of default methods
    1.62 + * in this situation.
    1.63 + *
    1.64 + * @param <R> the return type of this visitor's methods.  Use {@link
    1.65 + *            Void} for visitors that do not need to return results.
    1.66 + * @param <P> the type of the additional parameter to this visitor's
    1.67 + *            methods.  Use {@code Void} for visitors that do not need an
    1.68 + *            additional parameter.
    1.69 + *
    1.70 + * @see AbstractTypeVisitor6
    1.71 + * @see AbstractTypeVisitor8
    1.72 + * @since 1.7
    1.73 + */
    1.74 +public abstract class AbstractTypeVisitor7<R, P> extends AbstractTypeVisitor6<R, P> {
    1.75 +    /**
    1.76 +     * Constructor for concrete subclasses to call.
    1.77 +     */
    1.78 +    protected AbstractTypeVisitor7() {
    1.79 +        super();
    1.80 +    }
    1.81 +
    1.82 +    /**
    1.83 +     * Visits a {@code UnionType} in a manner defined by a subclass.
    1.84 +     *
    1.85 +     * @param t  {@inheritDoc}
    1.86 +     * @param p  {@inheritDoc}
    1.87 +     * @return the result of the visit as defined by a subclass
    1.88 +     */
    1.89 +    public abstract R visitUnion(UnionType t, P p);
    1.90 +}