| 1 | /* |
|---|---|
| 2 | * Copyright (C) 2007-2010 Júlio Vilmar Gesser. |
| 3 | * Copyright (C) 2011, 2013-2020 The JavaParser Team. |
| 4 | * |
| 5 | * This file is part of JavaParser. |
| 6 | * |
| 7 | * JavaParser can be used either under the terms of |
| 8 | * a) the GNU Lesser General Public License as published by |
| 9 | * the Free Software Foundation, either version 3 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * b) the terms of the Apache License |
| 12 | * |
| 13 | * You should have received a copy of both licenses in LICENCE.LGPL and |
| 14 | * LICENCE.APACHE. Please refer to those files for details. |
| 15 | * |
| 16 | * JavaParser is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU Lesser General Public License for more details. |
| 20 | */ |
| 21 | package com.github.javaparser.ast.expr; |
| 22 | |
| 23 | import com.github.javaparser.TokenRange; |
| 24 | import com.github.javaparser.ast.AllFieldsConstructor; |
| 25 | import com.github.javaparser.ast.Generated; |
| 26 | import com.github.javaparser.ast.Node; |
| 27 | import com.github.javaparser.ast.NodeList; |
| 28 | import com.github.javaparser.ast.nodeTypes.SwitchNode; |
| 29 | import com.github.javaparser.ast.observer.ObservableProperty; |
| 30 | import com.github.javaparser.ast.stmt.Statement; |
| 31 | import com.github.javaparser.ast.stmt.SwitchEntry; |
| 32 | import com.github.javaparser.ast.visitor.CloneVisitor; |
| 33 | import com.github.javaparser.ast.visitor.GenericVisitor; |
| 34 | import com.github.javaparser.ast.visitor.VoidVisitor; |
| 35 | import com.github.javaparser.metamodel.JavaParserMetaModel; |
| 36 | import com.github.javaparser.metamodel.SwitchStmtMetaModel; |
| 37 | import java.util.Optional; |
| 38 | import java.util.function.Consumer; |
| 39 | import static com.github.javaparser.utils.Utils.assertNotNull; |
| 40 | import com.github.javaparser.metamodel.SwitchExprMetaModel; |
| 41 | |
| 42 | /** |
| 43 | * <h1>The switch expression</h1> |
| 44 | * <h2>Java 1.0-11</h2> |
| 45 | * Not available. |
| 46 | * <h2>Java 12</h2> |
| 47 | * Like {@link com.github.javaparser.ast.stmt.SwitchStmt}, |
| 48 | * but can also be used as an expression. |
| 49 | * <br> |
| 50 | * <br>{@code int a = switch(x) { case 5,6 -> 20; case 9 -> 30; default -> 40; };} |
| 51 | * <br>{@code int a = switch(x) { case 5,6: break 20; default: break 5+5; };} |
| 52 | * <h2>Java 13</h2> |
| 53 | * The break statement has been reverted to what it was before Java 12, and break-with-value is now the YieldStatement. |
| 54 | * <br>{@code int a = switch(x) { case 5,6: yield 20; default: yield 5+5; };} |
| 55 | * |
| 56 | * @see SwitchEntry |
| 57 | * @see com.github.javaparser.ast.stmt.SwitchStmt |
| 58 | * @see SwitchNode |
| 59 | * @see com.github.javaparser.ast.stmt.BreakStmt |
| 60 | * @see com.github.javaparser.ast.stmt.YieldStmt |
| 61 | */ |
| 62 | public class SwitchExpr extends Expression implements SwitchNode { |
| 63 | |
| 64 | private Expression selector; |
| 65 | |
| 66 | private NodeList<SwitchEntry> entries; |
| 67 | |
| 68 | public SwitchExpr() { |
| 69 | this(null, new NameExpr(), new NodeList<>()); |
| 70 | } |
| 71 | |
| 72 | @AllFieldsConstructor |
| 73 | public SwitchExpr(final Expression selector, final NodeList<SwitchEntry> entries) { |
| 74 | this(null, selector, entries); |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * This constructor is used by the parser and is considered private. |
| 79 | */ |
| 80 | @Generated("com.github.javaparser.generator.core.node.MainConstructorGenerator") |
| 81 | public SwitchExpr(TokenRange tokenRange, Expression selector, NodeList<SwitchEntry> entries) { |
| 82 | super(tokenRange); |
| 83 | setSelector(selector); |
| 84 | setEntries(entries); |
| 85 | customInitialization(); |
| 86 | } |
| 87 | |
| 88 | @Override |
| 89 | @Generated("com.github.javaparser.generator.core.node.AcceptGenerator") |
| 90 | public <R, A> R accept(final GenericVisitor<R, A> v, final A arg) { |
| 91 | return v.visit(this, arg); |
| 92 | } |
| 93 | |
| 94 | @Override |
| 95 | @Generated("com.github.javaparser.generator.core.node.AcceptGenerator") |
| 96 | public <A> void accept(final VoidVisitor<A> v, final A arg) { |
| 97 | v.visit(this, arg); |
| 98 | } |
| 99 | |
| 100 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 101 | public NodeList<SwitchEntry> getEntries() { |
| 102 | return entries; |
| 103 | } |
| 104 | |
| 105 | public SwitchEntry getEntry(int i) { |
| 106 | return getEntries().get(i); |
| 107 | } |
| 108 | |
| 109 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 110 | public Expression getSelector() { |
| 111 | return selector; |
| 112 | } |
| 113 | |
| 114 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 115 | public SwitchExpr setEntries(final NodeList<SwitchEntry> entries) { |
| 116 | assertNotNull(entries); |
| 117 | if (entries == this.entries) { |
| 118 | return (SwitchExpr) this; |
| 119 | } |
| 120 | notifyPropertyChange(ObservableProperty.ENTRIES, this.entries, entries); |
| 121 | if (this.entries != null) |
| 122 | this.entries.setParentNode(null); |
| 123 | this.entries = entries; |
| 124 | setAsParentNodeOf(entries); |
| 125 | return this; |
| 126 | } |
| 127 | |
| 128 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 129 | public SwitchExpr setSelector(final Expression selector) { |
| 130 | assertNotNull(selector); |
| 131 | if (selector == this.selector) { |
| 132 | return (SwitchExpr) this; |
| 133 | } |
| 134 | notifyPropertyChange(ObservableProperty.SELECTOR, this.selector, selector); |
| 135 | if (this.selector != null) |
| 136 | this.selector.setParentNode(null); |
| 137 | this.selector = selector; |
| 138 | setAsParentNodeOf(selector); |
| 139 | return this; |
| 140 | } |
| 141 | |
| 142 | @Override |
| 143 | @Generated("com.github.javaparser.generator.core.node.RemoveMethodGenerator") |
| 144 | public boolean remove(Node node) { |
| 145 | if (node == null) |
| 146 | return false; |
| 147 | for (int i = 0; i < entries.size(); i++) { |
| 148 | if (entries.get(i) == node) { |
| 149 | entries.remove(i); |
| 150 | return true; |
| 151 | } |
| 152 | } |
| 153 | return super.remove(node); |
| 154 | } |
| 155 | |
| 156 | @Override |
| 157 | @Generated("com.github.javaparser.generator.core.node.CloneGenerator") |
| 158 | public SwitchExpr clone() { |
| 159 | return (SwitchExpr) accept(new CloneVisitor(), null); |
| 160 | } |
| 161 | |
| 162 | @Override |
| 163 | @Generated("com.github.javaparser.generator.core.node.ReplaceMethodGenerator") |
| 164 | public boolean replace(Node node, Node replacementNode) { |
| 165 | if (node == null) |
| 166 | return false; |
| 167 | for (int i = 0; i < entries.size(); i++) { |
| 168 | if (entries.get(i) == node) { |
| 169 | entries.set(i, (SwitchEntry) replacementNode); |
| 170 | return true; |
| 171 | } |
| 172 | } |
| 173 | if (node == selector) { |
| 174 | setSelector((Expression) replacementNode); |
| 175 | return true; |
| 176 | } |
| 177 | return super.replace(node, replacementNode); |
| 178 | } |
| 179 | |
| 180 | @Override |
| 181 | @Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator") |
| 182 | public boolean isSwitchExpr() { |
| 183 | return true; |
| 184 | } |
| 185 | |
| 186 | @Override |
| 187 | @Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator") |
| 188 | public SwitchExpr asSwitchExpr() { |
| 189 | return this; |
| 190 | } |
| 191 | |
| 192 | @Override |
| 193 | @Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator") |
| 194 | public Optional<SwitchExpr> toSwitchExpr() { |
| 195 | return Optional.of(this); |
| 196 | } |
| 197 | |
| 198 | @Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator") |
| 199 | public void ifSwitchExpr(Consumer<SwitchExpr> action) { |
| 200 | action.accept(this); |
| 201 | } |
| 202 | |
| 203 | @Override |
| 204 | @Generated("com.github.javaparser.generator.core.node.GetMetaModelGenerator") |
| 205 | public SwitchExprMetaModel getMetaModel() { |
| 206 | return JavaParserMetaModel.switchExprMetaModel; |
| 207 | } |
| 208 | } |
| 209 |
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