1 /*
   2  * Copyright (c) 2018, 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 com.sun.source.tree;
  27 
  28 import java.util.List;
  29 
  30 /**
  31  * {@preview Associated with switch expressions, a preview feature of
  32  *           the Java language.
  33  *
  34  *           This interface is associated with <i>switch expressions</i>, a preview
  35  *           feature of the Java language. Preview features
  36  *           may be removed in a future release, or upgraded to permanent
  37  *           features of the Java language.}
  38  *
  39  * A tree node for a {@code switch} expression.
  40  *
  41  * For example:
  42  * <pre>
  43  *   switch ( <em>expression</em> ) {
  44  *     <em>cases</em>
  45  *   }
  46  * </pre>
  47  *
  48  * @jls 15.29 Switch Expressions
  49  *
  50  * @since 12
  51  */
  52 @jdk.internal.PreviewFeature(feature=jdk.internal.PreviewFeature.Feature.SWITCH_EXPRESSIONS)
  53 public interface SwitchExpressionTree extends ExpressionTree {
  54     /**
  55      * Returns the expression for the {@code switch} expression.
  56      * @return the expression
  57      */
  58     ExpressionTree getExpression();
  59 
  60     /**
  61      * Returns the cases for the {@code switch} expression.
  62      * @return the cases
  63      */
  64     List<? extends CaseTree> getCases();
  65 }