| 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.stmt; |
| 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.expr.Expression; |
| 29 | import com.github.javaparser.ast.nodeTypes.NodeWithStatements; |
| 30 | import com.github.javaparser.ast.observer.ObservableProperty; |
| 31 | import com.github.javaparser.ast.visitor.CloneVisitor; |
| 32 | import com.github.javaparser.ast.visitor.GenericVisitor; |
| 33 | import com.github.javaparser.ast.visitor.VoidVisitor; |
| 34 | import com.github.javaparser.metamodel.JavaParserMetaModel; |
| 35 | import com.github.javaparser.metamodel.SwitchEntryMetaModel; |
| 36 | import static com.github.javaparser.utils.Utils.assertNotNull; |
| 37 | |
| 38 | /** |
| 39 | * <h1>One case in a switch statement</h1> |
| 40 | * The main Javadoc is in {@link SwitchStmt} |
| 41 | * <h2>Java 1.0-11</h2> |
| 42 | * <pre>{@code |
| 43 | * switch (i) { |
| 44 | * case 1: |
| 45 | * case 2: |
| 46 | * System.out.println(444); |
| 47 | * break; |
| 48 | * default: |
| 49 | * System.out.println(0); |
| 50 | * } |
| 51 | * }</pre> |
| 52 | * <br> |
| 53 | * This contains three SwitchEntrys. All of them are of type STATEMENT_GROUP. |
| 54 | * <ul> |
| 55 | * <li>The first one has label 1 and no statements.</li> |
| 56 | * <li>The second has label 2 and two statements (the println and the break).</li> |
| 57 | * <li>The third, the default, has no label and one statement.</li> |
| 58 | * </ul> |
| 59 | * <h2>Java 12-</h2> |
| 60 | * <pre>{@code |
| 61 | * case 1 -> 15*15; |
| 62 | * case 2 -> { a++; b++; } |
| 63 | * case 3 -> throw new Exception(); |
| 64 | * }</pre> |
| 65 | * These are three new variants. |
| 66 | * <ul> |
| 67 | * <li>The first one is of type EXPRESSION and stores its {@link Expression} in an {@link ExpressionStmt} which is stored as the first and only statement in statements.</li> |
| 68 | * <li>The second one is of type BLOCK and stores its {@link BlockStmt} as the first and only statement in statements.</li> |
| 69 | * <li>The third one is of type THROWS_STATEMENT and stores its {@link ThrowStmt} as the first and only statement in statements.</li> |
| 70 | * </ul> |
| 71 | * <pre>{@code |
| 72 | * case MONDAY, FRIDAY, SUNDAY -> 6; |
| 73 | * }</pre> |
| 74 | * Multiple case labels are now allowed. |
| 75 | * <pre>{@code |
| 76 | * case 16*16, 10+10 -> 6; |
| 77 | * }</pre> |
| 78 | * Many kinds of expressions are now allowed. |
| 79 | * |
| 80 | * @author Julio Vilmar Gesser |
| 81 | * @see SwitchStmt |
| 82 | * @see com.github.javaparser.ast.expr.SwitchExpr |
| 83 | */ |
| 84 | public class SwitchEntry extends Node implements NodeWithStatements<SwitchEntry> { |
| 85 | |
| 86 | public enum Type { |
| 87 | |
| 88 | STATEMENT_GROUP, EXPRESSION, BLOCK, THROWS_STATEMENT |
| 89 | } |
| 90 | |
| 91 | private NodeList<Expression> labels; |
| 92 | |
| 93 | private NodeList<Statement> statements; |
| 94 | |
| 95 | private Type type; |
| 96 | |
| 97 | public SwitchEntry() { |
| 98 | this(null, new NodeList<Expression>(), Type.STATEMENT_GROUP, new NodeList<>()); |
| 99 | } |
| 100 | |
| 101 | @AllFieldsConstructor |
| 102 | public SwitchEntry(final NodeList<Expression> labels, final Type type, final NodeList<Statement> statements) { |
| 103 | this(null, labels, type, statements); |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * This constructor is used by the parser and is considered private. |
| 108 | */ |
| 109 | @Generated("com.github.javaparser.generator.core.node.MainConstructorGenerator") |
| 110 | public SwitchEntry(TokenRange tokenRange, NodeList<Expression> labels, Type type, NodeList<Statement> statements) { |
| 111 | super(tokenRange); |
| 112 | setLabels(labels); |
| 113 | setType(type); |
| 114 | setStatements(statements); |
| 115 | customInitialization(); |
| 116 | } |
| 117 | |
| 118 | @Override |
| 119 | @Generated("com.github.javaparser.generator.core.node.AcceptGenerator") |
| 120 | public <R, A> R accept(final GenericVisitor<R, A> v, final A arg) { |
| 121 | return v.visit(this, arg); |
| 122 | } |
| 123 | |
| 124 | @Override |
| 125 | @Generated("com.github.javaparser.generator.core.node.AcceptGenerator") |
| 126 | public <A> void accept(final VoidVisitor<A> v, final A arg) { |
| 127 | v.visit(this, arg); |
| 128 | } |
| 129 | |
| 130 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 131 | public NodeList<Expression> getLabels() { |
| 132 | return labels; |
| 133 | } |
| 134 | |
| 135 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 136 | public NodeList<Statement> getStatements() { |
| 137 | return statements; |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * Sets the label |
| 142 | * |
| 143 | * @param labels the label, can be null |
| 144 | * @return this, the SwitchEntry |
| 145 | */ |
| 146 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 147 | public SwitchEntry setLabels(final NodeList<Expression> labels) { |
| 148 | assertNotNull(labels); |
| 149 | if (labels == this.labels) { |
| 150 | return (SwitchEntry) this; |
| 151 | } |
| 152 | notifyPropertyChange(ObservableProperty.LABELS, this.labels, labels); |
| 153 | if (this.labels != null) |
| 154 | this.labels.setParentNode(null); |
| 155 | this.labels = labels; |
| 156 | setAsParentNodeOf(labels); |
| 157 | return this; |
| 158 | } |
| 159 | |
| 160 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 161 | public SwitchEntry setStatements(final NodeList<Statement> statements) { |
| 162 | assertNotNull(statements); |
| 163 | if (statements == this.statements) { |
| 164 | return (SwitchEntry) this; |
| 165 | } |
| 166 | notifyPropertyChange(ObservableProperty.STATEMENTS, this.statements, statements); |
| 167 | if (this.statements != null) |
| 168 | this.statements.setParentNode(null); |
| 169 | this.statements = statements; |
| 170 | setAsParentNodeOf(statements); |
| 171 | return this; |
| 172 | } |
| 173 | |
| 174 | @Override |
| 175 | @Generated("com.github.javaparser.generator.core.node.RemoveMethodGenerator") |
| 176 | public boolean remove(Node node) { |
| 177 | if (node == null) |
| 178 | return false; |
| 179 | for (int i = 0; i < labels.size(); i++) { |
| 180 | if (labels.get(i) == node) { |
| 181 | labels.remove(i); |
| 182 | return true; |
| 183 | } |
| 184 | } |
| 185 | for (int i = 0; i < statements.size(); i++) { |
| 186 | if (statements.get(i) == node) { |
| 187 | statements.remove(i); |
| 188 | return true; |
| 189 | } |
| 190 | } |
| 191 | return super.remove(node); |
| 192 | } |
| 193 | |
| 194 | @Override |
| 195 | @Generated("com.github.javaparser.generator.core.node.CloneGenerator") |
| 196 | public SwitchEntry clone() { |
| 197 | return (SwitchEntry) accept(new CloneVisitor(), null); |
| 198 | } |
| 199 | |
| 200 | @Override |
| 201 | @Generated("com.github.javaparser.generator.core.node.GetMetaModelGenerator") |
| 202 | public SwitchEntryMetaModel getMetaModel() { |
| 203 | return JavaParserMetaModel.switchEntryMetaModel; |
| 204 | } |
| 205 | |
| 206 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 207 | public Type getType() { |
| 208 | return type; |
| 209 | } |
| 210 | |
| 211 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 212 | public SwitchEntry setType(final Type type) { |
| 213 | assertNotNull(type); |
| 214 | if (type == this.type) { |
| 215 | return (SwitchEntry) this; |
| 216 | } |
| 217 | notifyPropertyChange(ObservableProperty.TYPE, this.type, type); |
| 218 | this.type = type; |
| 219 | return this; |
| 220 | } |
| 221 | |
| 222 | @Override |
| 223 | @Generated("com.github.javaparser.generator.core.node.ReplaceMethodGenerator") |
| 224 | public boolean replace(Node node, Node replacementNode) { |
| 225 | if (node == null) |
| 226 | return false; |
| 227 | for (int i = 0; i < labels.size(); i++) { |
| 228 | if (labels.get(i) == node) { |
| 229 | labels.set(i, (Expression) replacementNode); |
| 230 | return true; |
| 231 | } |
| 232 | } |
| 233 | for (int i = 0; i < statements.size(); i++) { |
| 234 | if (statements.get(i) == node) { |
| 235 | statements.set(i, (Statement) replacementNode); |
| 236 | return true; |
| 237 | } |
| 238 | } |
| 239 | return super.replace(node, replacementNode); |
| 240 | } |
| 241 | } |
| 242 |
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