| 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.ast.AllFieldsConstructor; |
| 24 | import com.github.javaparser.ast.nodeTypes.NodeWithExpression; |
| 25 | import com.github.javaparser.ast.observer.ObservableProperty; |
| 26 | import com.github.javaparser.ast.visitor.GenericVisitor; |
| 27 | import com.github.javaparser.ast.visitor.VoidVisitor; |
| 28 | import static com.github.javaparser.utils.Utils.assertNotNull; |
| 29 | import com.github.javaparser.ast.Node; |
| 30 | import com.github.javaparser.ast.visitor.CloneVisitor; |
| 31 | import com.github.javaparser.metamodel.DerivedProperty; |
| 32 | import com.github.javaparser.metamodel.UnaryExprMetaModel; |
| 33 | import com.github.javaparser.metamodel.JavaParserMetaModel; |
| 34 | import com.github.javaparser.printer.Printable; |
| 35 | import com.github.javaparser.TokenRange; |
| 36 | import java.util.function.Consumer; |
| 37 | import java.util.Optional; |
| 38 | import com.github.javaparser.ast.Generated; |
| 39 | |
| 40 | /** |
| 41 | * An expression where an operator is applied to a single expression. |
| 42 | * It supports the operators that are found in the UnaryExpr.Operator enum. |
| 43 | * <br>{@code 11++} |
| 44 | * <br>{@code ++11} |
| 45 | * <br>{@code ~1} |
| 46 | * <br>{@code -333} |
| 47 | * |
| 48 | * @author Julio Vilmar Gesser |
| 49 | */ |
| 50 | public class UnaryExpr extends Expression implements NodeWithExpression<UnaryExpr> { |
| 51 | |
| 52 | public enum Operator implements Printable { |
| 53 | |
| 54 | PLUS("+", false), |
| 55 | MINUS("-", false), |
| 56 | PREFIX_INCREMENT("++", false), |
| 57 | PREFIX_DECREMENT("--", false), |
| 58 | LOGICAL_COMPLEMENT("!", false), |
| 59 | BITWISE_COMPLEMENT("~", false), |
| 60 | POSTFIX_INCREMENT("++", true), |
| 61 | POSTFIX_DECREMENT("--", true); |
| 62 | |
| 63 | private final String codeRepresentation; |
| 64 | |
| 65 | private final boolean isPostfix; |
| 66 | |
| 67 | Operator(String codeRepresentation, boolean isPostfix) { |
| 68 | this.codeRepresentation = codeRepresentation; |
| 69 | this.isPostfix = isPostfix; |
| 70 | } |
| 71 | |
| 72 | public String asString() { |
| 73 | return codeRepresentation; |
| 74 | } |
| 75 | |
| 76 | public boolean isPostfix() { |
| 77 | return isPostfix; |
| 78 | } |
| 79 | |
| 80 | public boolean isPrefix() { |
| 81 | return !isPostfix(); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | private Expression expression; |
| 86 | |
| 87 | private Operator operator; |
| 88 | |
| 89 | public UnaryExpr() { |
| 90 | this(null, new IntegerLiteralExpr(), Operator.POSTFIX_INCREMENT); |
| 91 | } |
| 92 | |
| 93 | @AllFieldsConstructor |
| 94 | public UnaryExpr(final Expression expression, final Operator operator) { |
| 95 | this(null, expression, operator); |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * This constructor is used by the parser and is considered private. |
| 100 | */ |
| 101 | @Generated("com.github.javaparser.generator.core.node.MainConstructorGenerator") |
| 102 | public UnaryExpr(TokenRange tokenRange, Expression expression, Operator operator) { |
| 103 | super(tokenRange); |
| 104 | setExpression(expression); |
| 105 | setOperator(operator); |
| 106 | customInitialization(); |
| 107 | } |
| 108 | |
| 109 | @Override |
| 110 | @Generated("com.github.javaparser.generator.core.node.AcceptGenerator") |
| 111 | public <R, A> R accept(final GenericVisitor<R, A> v, final A arg) { |
| 112 | return v.visit(this, arg); |
| 113 | } |
| 114 | |
| 115 | @Override |
| 116 | @Generated("com.github.javaparser.generator.core.node.AcceptGenerator") |
| 117 | public <A> void accept(final VoidVisitor<A> v, final A arg) { |
| 118 | v.visit(this, arg); |
| 119 | } |
| 120 | |
| 121 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 122 | public Expression getExpression() { |
| 123 | return expression; |
| 124 | } |
| 125 | |
| 126 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 127 | public Operator getOperator() { |
| 128 | return operator; |
| 129 | } |
| 130 | |
| 131 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 132 | public UnaryExpr setExpression(final Expression expression) { |
| 133 | assertNotNull(expression); |
| 134 | if (expression == this.expression) { |
| 135 | return (UnaryExpr) this; |
| 136 | } |
| 137 | notifyPropertyChange(ObservableProperty.EXPRESSION, this.expression, expression); |
| 138 | if (this.expression != null) |
| 139 | this.expression.setParentNode(null); |
| 140 | this.expression = expression; |
| 141 | setAsParentNodeOf(expression); |
| 142 | return this; |
| 143 | } |
| 144 | |
| 145 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 146 | public UnaryExpr setOperator(final Operator operator) { |
| 147 | assertNotNull(operator); |
| 148 | if (operator == this.operator) { |
| 149 | return (UnaryExpr) this; |
| 150 | } |
| 151 | notifyPropertyChange(ObservableProperty.OPERATOR, this.operator, operator); |
| 152 | this.operator = operator; |
| 153 | return this; |
| 154 | } |
| 155 | |
| 156 | @Override |
| 157 | @Generated("com.github.javaparser.generator.core.node.RemoveMethodGenerator") |
| 158 | public boolean remove(Node node) { |
| 159 | if (node == null) |
| 160 | return false; |
| 161 | return super.remove(node); |
| 162 | } |
| 163 | |
| 164 | @DerivedProperty |
| 165 | public boolean isPostfix() { |
| 166 | return operator.isPostfix(); |
| 167 | } |
| 168 | |
| 169 | @DerivedProperty |
| 170 | public boolean isPrefix() { |
| 171 | return !isPostfix(); |
| 172 | } |
| 173 | |
| 174 | @Override |
| 175 | @Generated("com.github.javaparser.generator.core.node.CloneGenerator") |
| 176 | public UnaryExpr clone() { |
| 177 | return (UnaryExpr) accept(new CloneVisitor(), null); |
| 178 | } |
| 179 | |
| 180 | @Override |
| 181 | @Generated("com.github.javaparser.generator.core.node.GetMetaModelGenerator") |
| 182 | public UnaryExprMetaModel getMetaModel() { |
| 183 | return JavaParserMetaModel.unaryExprMetaModel; |
| 184 | } |
| 185 | |
| 186 | @Override |
| 187 | @Generated("com.github.javaparser.generator.core.node.ReplaceMethodGenerator") |
| 188 | public boolean replace(Node node, Node replacementNode) { |
| 189 | if (node == null) |
| 190 | return false; |
| 191 | if (node == expression) { |
| 192 | setExpression((Expression) replacementNode); |
| 193 | return true; |
| 194 | } |
| 195 | return super.replace(node, replacementNode); |
| 196 | } |
| 197 | |
| 198 | @Override |
| 199 | @Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator") |
| 200 | public boolean isUnaryExpr() { |
| 201 | return true; |
| 202 | } |
| 203 | |
| 204 | @Override |
| 205 | @Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator") |
| 206 | public UnaryExpr asUnaryExpr() { |
| 207 | return this; |
| 208 | } |
| 209 | |
| 210 | @Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator") |
| 211 | public void ifUnaryExpr(Consumer<UnaryExpr> action) { |
| 212 | action.accept(this); |
| 213 | } |
| 214 | |
| 215 | @Override |
| 216 | @Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator") |
| 217 | public Optional<UnaryExpr> toUnaryExpr() { |
| 218 | return Optional.of(this); |
| 219 | } |
| 220 | } |
| 221 |
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