| /* |
| * Copyright (C) 2007-2010 JĂșlio Vilmar Gesser. |
| * Copyright (C) 2011, 2013-2016 The JavaParser Team. |
| * |
| * This file is part of JavaParser. |
| * |
| * JavaParser can be used either under the terms of |
| * a) the GNU Lesser General Public License as published by |
| * the Free Software Foundation, either version 3 of the License, or |
| * (at your option) any later version. |
| * b) the terms of the Apache License |
| * |
| * You should have received a copy of both licenses in LICENCE.LGPL and |
| * LICENCE.APACHE. Please refer to those files for details. |
| * |
| * JavaParser is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Lesser General Public License for more details. |
| */ |
| package com.github.javaparser.ast.body; |
| |
| import com.github.javaparser.ast.AllFieldsConstructor; |
| import com.github.javaparser.ast.Node; |
| import com.github.javaparser.ast.expr.Expression; |
| import com.github.javaparser.ast.expr.NameExpr; |
| import com.github.javaparser.ast.expr.SimpleName; |
| import com.github.javaparser.ast.nodeTypes.NodeWithSimpleName; |
| import com.github.javaparser.ast.nodeTypes.NodeWithType; |
| import com.github.javaparser.ast.nodeTypes.NodeWithVariables; |
| import com.github.javaparser.ast.observer.AstObserverAdapter; |
| import com.github.javaparser.ast.observer.ObservableProperty; |
| import com.github.javaparser.ast.type.ClassOrInterfaceType; |
| import com.github.javaparser.ast.type.Type; |
| import com.github.javaparser.ast.visitor.CloneVisitor; |
| import com.github.javaparser.ast.visitor.GenericVisitor; |
| import com.github.javaparser.ast.visitor.VoidVisitor; |
| import com.github.javaparser.metamodel.JavaParserMetaModel; |
| import com.github.javaparser.metamodel.NonEmptyProperty; |
| import com.github.javaparser.metamodel.OptionalProperty; |
| import com.github.javaparser.metamodel.VariableDeclaratorMetaModel; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Optional; |
| import static com.github.javaparser.utils.Utils.assertNonEmpty; |
| import static com.github.javaparser.utils.Utils.assertNotNull; |
| import javax.annotation.Generated; |
| import com.github.javaparser.TokenRange; |
| import com.github.javaparser.resolution.Resolvable; |
| import com.github.javaparser.resolution.declarations.ResolvedFieldDeclaration; |
| |
| /** |
| * The declaration of a variable.<br/>In <code>int x = 14, y = 3;</code> "x = 14" and " y = 3" are |
| * VariableDeclarators. |
| * |
| * @author Julio Vilmar Gesser |
| */ |
| public final class VariableDeclarator extends Node implements NodeWithType<VariableDeclarator, Type>, NodeWithSimpleName<VariableDeclarator>, Resolvable<ResolvedFieldDeclaration> { |
| |
| private SimpleName name; |
| |
| @OptionalProperty |
| @NonEmptyProperty |
| private Expression initializer; |
| |
| private Type type; |
| |
| public VariableDeclarator() { |
| this(null, new ClassOrInterfaceType(), new SimpleName(), null); |
| } |
| |
| public VariableDeclarator(Type type, String variableName) { |
| this(null, type, new SimpleName(variableName), null); |
| } |
| |
| public VariableDeclarator(Type type, SimpleName name) { |
| this(null, type, name, null); |
| } |
| |
| public VariableDeclarator(Type type, String variableName, Expression initializer) { |
| this(null, type, new SimpleName(variableName), initializer); |
| } |
| |
| /** |
| * Defines the declaration of a variable. |
| * |
| * @param name The identifier for this variable. IE. The variables name. |
| * @param initializer What this variable should be initialized to. An {@link com.github.javaparser.ast.expr.AssignExpr} |
| * is unnecessary as the <code>=</code> operator is already added. |
| */ |
| @AllFieldsConstructor |
| public VariableDeclarator(Type type, SimpleName name, Expression initializer) { |
| this(null, type, name, initializer); |
| } |
| |
| /** |
| * This constructor is used by the parser and is considered private. |
| */ |
| @Generated("com.github.javaparser.generator.core.node.MainConstructorGenerator") |
| public VariableDeclarator(TokenRange tokenRange, Type type, SimpleName name, Expression initializer) { |
| super(tokenRange); |
| setType(type); |
| setName(name); |
| setInitializer(initializer); |
| customInitialization(); |
| } |
| |
| @Override |
| protected void customInitialization() { |
| // We register an observer on the type property. When it is changed the MaximumCommonType is changes as well, |
| // because it is derived from the type of the variables it contains, for this reason we notify about the change |
| register(new AstObserverAdapter() { |
| |
| @Override |
| public void propertyChange(Node observedNode, ObservableProperty property, Object oldValue, Object newValue) { |
| if (property == ObservableProperty.TYPE) { |
| VariableDeclarator vd = VariableDeclarator.this; |
| if (vd.getParentNode().isPresent() && vd.getParentNode().get() instanceof NodeWithVariables) { |
| NodeWithVariables nodeWithVariables = (NodeWithVariables) vd.getParentNode().get(); |
| // We calculate the value the property will assume after the change will be completed |
| Optional<Type> currentMaxCommonType = nodeWithVariables.getMaximumCommonType(); |
| List<Type> types = new LinkedList<>(); |
| int index = nodeWithVariables.getVariables().indexOf(vd); |
| for (int i = 0; i < nodeWithVariables.getVariables().size(); i++) { |
| if (i == index) { |
| types.add((Type) newValue); |
| } else { |
| types.add(nodeWithVariables.getVariable(i).getType()); |
| } |
| } |
| Optional<Type> newMaxCommonType = NodeWithVariables.calculateMaximumCommonType(types); |
| ((Node) nodeWithVariables).notifyPropertyChange(ObservableProperty.MAXIMUM_COMMON_TYPE, currentMaxCommonType.orElse(null), newMaxCommonType.orElse(null)); |
| } |
| } |
| } |
| }); |
| } |
| |
| @Override |
| @Generated("com.github.javaparser.generator.core.node.AcceptGenerator") |
| public <R, A> R accept(final GenericVisitor<R, A> v, final A arg) { |
| return v.visit(this, arg); |
| } |
| |
| @Override |
| @Generated("com.github.javaparser.generator.core.node.AcceptGenerator") |
| public <A> void accept(final VoidVisitor<A> v, final A arg) { |
| v.visit(this, arg); |
| } |
| |
| @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| public Optional<Expression> getInitializer() { |
| return Optional.ofNullable(initializer); |
| } |
| |
| @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| public SimpleName getName() { |
| return name; |
| } |
| |
| @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| public VariableDeclarator setName(final SimpleName name) { |
| assertNotNull(name); |
| if (name == this.name) { |
| return (VariableDeclarator) this; |
| } |
| notifyPropertyChange(ObservableProperty.NAME, this.name, name); |
| if (this.name != null) |
| this.name.setParentNode(null); |
| this.name = name; |
| setAsParentNodeOf(name); |
| return this; |
| } |
| |
| /** |
| * Sets the initializer expression |
| * |
| * @param initializer the initializer expression, can be null |
| * @return this, the VariableDeclarator |
| */ |
| @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| public VariableDeclarator setInitializer(final Expression initializer) { |
| if (initializer == this.initializer) { |
| return (VariableDeclarator) this; |
| } |
| notifyPropertyChange(ObservableProperty.INITIALIZER, this.initializer, initializer); |
| if (this.initializer != null) |
| this.initializer.setParentNode(null); |
| this.initializer = initializer; |
| setAsParentNodeOf(initializer); |
| return this; |
| } |
| |
| /** |
| * Will create a {@link NameExpr} with the initializer param |
| * |
| * @param init the initializer expression, can be null |
| * @return this, the VariableDeclarator |
| */ |
| public VariableDeclarator setInitializer(String init) { |
| return setInitializer(new NameExpr(assertNonEmpty(init))); |
| } |
| |
| @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| public Type getType() { |
| return type; |
| } |
| |
| @Generated("com.github.javaparser.generator.core.node.PropertyGenerator") |
| public VariableDeclarator setType(final Type type) { |
| assertNotNull(type); |
| if (type == this.type) { |
| return (VariableDeclarator) this; |
| } |
| notifyPropertyChange(ObservableProperty.TYPE, this.type, type); |
| if (this.type != null) |
| this.type.setParentNode(null); |
| this.type = type; |
| setAsParentNodeOf(type); |
| return this; |
| } |
| |
| @Override |
| @Generated("com.github.javaparser.generator.core.node.RemoveMethodGenerator") |
| public boolean remove(Node node) { |
| if (node == null) |
| return false; |
| if (initializer != null) { |
| if (node == initializer) { |
| removeInitializer(); |
| return true; |
| } |
| } |
| return super.remove(node); |
| } |
| |
| @Generated("com.github.javaparser.generator.core.node.RemoveMethodGenerator") |
| public VariableDeclarator removeInitializer() { |
| return setInitializer((Expression) null); |
| } |
| |
| @Override |
| @Generated("com.github.javaparser.generator.core.node.CloneGenerator") |
| public VariableDeclarator clone() { |
| return (VariableDeclarator) accept(new CloneVisitor(), null); |
| } |
| |
| @Override |
| @Generated("com.github.javaparser.generator.core.node.GetMetaModelGenerator") |
| public VariableDeclaratorMetaModel getMetaModel() { |
| return JavaParserMetaModel.variableDeclaratorMetaModel; |
| } |
| |
| @Override |
| @Generated("com.github.javaparser.generator.core.node.ReplaceMethodGenerator") |
| public boolean replace(Node node, Node replacementNode) { |
| if (node == null) |
| return false; |
| if (initializer != null) { |
| if (node == initializer) { |
| setInitializer((Expression) replacementNode); |
| return true; |
| } |
| } |
| if (node == name) { |
| setName((SimpleName) replacementNode); |
| return true; |
| } |
| if (node == type) { |
| setType((Type) replacementNode); |
| return true; |
| } |
| return super.replace(node, replacementNode); |
| } |
| |
| @Override |
| public ResolvedFieldDeclaration resolve() { |
| return getSymbolResolver().resolveDeclaration(this, ResolvedFieldDeclaration.class); |
| } |
| } |