| 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.observer.ObservableProperty; |
| 25 | import com.github.javaparser.ast.visitor.GenericVisitor; |
| 26 | import com.github.javaparser.ast.visitor.VoidVisitor; |
| 27 | import java.util.Optional; |
| 28 | import com.github.javaparser.ast.Node; |
| 29 | import com.github.javaparser.ast.visitor.CloneVisitor; |
| 30 | import com.github.javaparser.metamodel.OptionalProperty; |
| 31 | import com.github.javaparser.metamodel.ThisExprMetaModel; |
| 32 | import com.github.javaparser.metamodel.JavaParserMetaModel; |
| 33 | import com.github.javaparser.TokenRange; |
| 34 | import com.github.javaparser.resolution.Resolvable; |
| 35 | import com.github.javaparser.resolution.declarations.ResolvedTypeDeclaration; |
| 36 | import java.util.function.Consumer; |
| 37 | import com.github.javaparser.ast.Generated; |
| 38 | |
| 39 | /** |
| 40 | * An occurrence of the "this" keyword. <br> |
| 41 | * {@code World.this.greet()} is a MethodCallExpr of method name greet, |
| 42 | * and scope "World.this" which is a ThisExpr with typeName "World". <br> |
| 43 | * {@code this.name} is a FieldAccessExpr of field greet, and a ThisExpr as its scope. |
| 44 | * This ThisExpr has no typeName. |
| 45 | * |
| 46 | * @author Julio Vilmar Gesser |
| 47 | * @see com.github.javaparser.ast.stmt.ExplicitConstructorInvocationStmt |
| 48 | * @see SuperExpr |
| 49 | */ |
| 50 | public class ThisExpr extends Expression implements Resolvable<ResolvedTypeDeclaration> { |
| 51 | |
| 52 | @OptionalProperty |
| 53 | private Name typeName; |
| 54 | |
| 55 | public ThisExpr() { |
| 56 | this(null, null); |
| 57 | } |
| 58 | |
| 59 | @AllFieldsConstructor |
| 60 | public ThisExpr(final Name typeName) { |
| 61 | this(null, typeName); |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * This constructor is used by the parser and is considered private. |
| 66 | */ |
| 67 | @Generated("com.github.javaparser.generator.core.node.MainConstructorGenerator") |
| 68 | public ThisExpr(TokenRange tokenRange, Name typeName) { |
| 69 | super(tokenRange); |
| 70 | setTypeName(typeName); |
| 71 | customInitialization(); |
| 72 | } |
| 73 | |
| 74 | @Override |
| 75 | @Generated("com.github.javaparser.generator.core.node.AcceptGenerator") |
| 76 | public <R, A> R accept(final GenericVisitor<R, A> v, final A arg) { |
| 77 | return v.visit(this, arg); |
| 78 | } |
| 79 | |
| 80 | @Override |
| 81 | @Generated("com.github.javaparser.generator.core.node.AcceptGenerator") |
| 82 | public <A> void accept(final VoidVisitor<A> v, final A arg) { |
| 83 | v.visit(this, arg); |
| 84 | } |
| 85 | |
| 86 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 87 | public Optional<Name> getTypeName() { |
| 88 | return Optional.ofNullable(typeName); |
| 89 | } |
| 90 | |
| 91 | @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| 92 | public ThisExpr setTypeName(final Name typeName) { |
| 93 | if (typeName == this.typeName) { |
| 94 | return (ThisExpr) this; |
| 95 | } |
| 96 | notifyPropertyChange(ObservableProperty.TYPE_NAME, this.typeName, typeName); |
| 97 | if (this.typeName != null) |
| 98 | this.typeName.setParentNode(null); |
| 99 | this.typeName = typeName; |
| 100 | setAsParentNodeOf(typeName); |
| 101 | return this; |
| 102 | } |
| 103 | |
| 104 | @Override |
| 105 | @Generated("com.github.javaparser.generator.core.node.RemoveMethodGenerator") |
| 106 | public boolean remove(Node node) { |
| 107 | if (node == null) |
| 108 | return false; |
| 109 | if (typeName != null) { |
| 110 | if (node == typeName) { |
| 111 | removeTypeName(); |
| 112 | return true; |
| 113 | } |
| 114 | } |
| 115 | return super.remove(node); |
| 116 | } |
| 117 | |
| 118 | @Generated("com.github.javaparser.generator.core.node.RemoveMethodGenerator") |
| 119 | public ThisExpr removeClassName() { |
| 120 | return setTypeName((Name) null); |
| 121 | } |
| 122 | |
| 123 | @Override |
| 124 | @Generated("com.github.javaparser.generator.core.node.CloneGenerator") |
| 125 | public ThisExpr clone() { |
| 126 | return (ThisExpr) accept(new CloneVisitor(), null); |
| 127 | } |
| 128 | |
| 129 | @Override |
| 130 | @Generated("com.github.javaparser.generator.core.node.GetMetaModelGenerator") |
| 131 | public ThisExprMetaModel getMetaModel() { |
| 132 | return JavaParserMetaModel.thisExprMetaModel; |
| 133 | } |
| 134 | |
| 135 | @Override |
| 136 | @Generated("com.github.javaparser.generator.core.node.ReplaceMethodGenerator") |
| 137 | public boolean replace(Node node, Node replacementNode) { |
| 138 | if (node == null) |
| 139 | return false; |
| 140 | if (typeName != null) { |
| 141 | if (node == typeName) { |
| 142 | setTypeName((Name) replacementNode); |
| 143 | return true; |
| 144 | } |
| 145 | } |
| 146 | return super.replace(node, replacementNode); |
| 147 | } |
| 148 | |
| 149 | @Override |
| 150 | @Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator") |
| 151 | public boolean isThisExpr() { |
| 152 | return true; |
| 153 | } |
| 154 | |
| 155 | @Override |
| 156 | @Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator") |
| 157 | public ThisExpr asThisExpr() { |
| 158 | return this; |
| 159 | } |
| 160 | |
| 161 | @Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator") |
| 162 | public void ifThisExpr(Consumer<ThisExpr> action) { |
| 163 | action.accept(this); |
| 164 | } |
| 165 | |
| 166 | @Override |
| 167 | public ResolvedTypeDeclaration resolve() { |
| 168 | return getSymbolResolver().resolveDeclaration(this, ResolvedTypeDeclaration.class); |
| 169 | } |
| 170 | |
| 171 | @Override |
| 172 | @Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator") |
| 173 | public Optional<ThisExpr> toThisExpr() { |
| 174 | return Optional.of(this); |
| 175 | } |
| 176 | |
| 177 | @Generated("com.github.javaparser.generator.core.node.RemoveMethodGenerator") |
| 178 | public ThisExpr removeTypeName() { |
| 179 | return setTypeName((Name) null); |
| 180 | } |
| 181 | } |
| 182 |
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