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/*
* Copyright (C) 2007-2010 Júlio 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.expr;
import com.github.javaparser.ast.AllFieldsConstructor;
import com.github.javaparser.ast.nodeTypes.NodeWithExpression;
import com.github.javaparser.ast.observer.ObservableProperty;
import com.github.javaparser.ast.visitor.GenericVisitor;
import com.github.javaparser.ast.visitor.VoidVisitor;
import static com.github.javaparser.utils.Utils.assertNotNull;
import com.github.javaparser.ast.Node;
import com.github.javaparser.ast.visitor.CloneVisitor;
import com.github.javaparser.metamodel.DerivedProperty;
import com.github.javaparser.metamodel.UnaryExprMetaModel;
import com.github.javaparser.metamodel.JavaParserMetaModel;
import com.github.javaparser.printer.Printable;
import javax.annotation.Generated;
import com.github.javaparser.TokenRange;
import java.util.function.Consumer;
import java.util.Optional;
/**
* An expression where an operator is applied to a single expression.
* It supports the operators that are found the the UnaryExpr.Operator enum.
* <br/><code>11++</code>
* <br/><code>++11</code>
* <br/><code>~1</code>
* <br/><code>-333</code>
*
* @author Julio Vilmar Gesser
*/
public final class UnaryExpr extends Expression implements NodeWithExpression<UnaryExpr> {
public enum Operator implements Printable {
PLUS("+", false),
MINUS("-", false),
PREFIX_INCREMENT("++", false),
PREFIX_DECREMENT("--", false),
LOGICAL_COMPLEMENT("!", false),
BITWISE_COMPLEMENT("~", false),
POSTFIX_INCREMENT("++", true),
POSTFIX_DECREMENT("--", true);
private final String codeRepresentation;
private final boolean isPostfix;
Operator(String codeRepresentation, boolean isPostfix) {
this.codeRepresentation = codeRepresentation;
this.isPostfix = isPostfix;
}
public String asString() {
return codeRepresentation;
}
public boolean isPostfix() {
return isPostfix;
}
public boolean isPrefix() {
return !isPostfix();
}
}
private Expression expression;
private Operator operator;
public UnaryExpr() {
this(null, new IntegerLiteralExpr(), Operator.POSTFIX_INCREMENT);
}
@AllFieldsConstructor
public UnaryExpr(final Expression expression, final Operator operator) {
this(null, expression, operator);
}
/**
* This constructor is used by the parser and is considered private.
*/
@Generated("com.github.javaparser.generator.core.node.MainConstructorGenerator")
public UnaryExpr(TokenRange tokenRange, Expression expression, Operator operator) {
super(tokenRange);
setExpression(expression);
setOperator(operator);
customInitialization();
}
@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 Expression getExpression() {
return expression;
}
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public Operator getOperator() {
return operator;
}
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public UnaryExpr setExpression(final Expression expression) {
assertNotNull(expression);
if (expression == this.expression) {
return (UnaryExpr) this;
}
notifyPropertyChange(ObservableProperty.EXPRESSION, this.expression, expression);
if (this.expression != null)
this.expression.setParentNode(null);
this.expression = expression;
setAsParentNodeOf(expression);
return this;
}
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public UnaryExpr setOperator(final Operator operator) {
assertNotNull(operator);
if (operator == this.operator) {
return (UnaryExpr) this;
}
notifyPropertyChange(ObservableProperty.OPERATOR, this.operator, operator);
this.operator = operator;
return this;
}
@Override
@Generated("com.github.javaparser.generator.core.node.RemoveMethodGenerator")
public boolean remove(Node node) {
if (node == null)
return false;
return super.remove(node);
}
@DerivedProperty
public boolean isPostfix() {
return operator.isPostfix();
}
@DerivedProperty
public boolean isPrefix() {
return !isPostfix();
}
@Override
@Generated("com.github.javaparser.generator.core.node.CloneGenerator")
public UnaryExpr clone() {
return (UnaryExpr) accept(new CloneVisitor(), null);
}
@Override
@Generated("com.github.javaparser.generator.core.node.GetMetaModelGenerator")
public UnaryExprMetaModel getMetaModel() {
return JavaParserMetaModel.unaryExprMetaModel;
}
@Override
@Generated("com.github.javaparser.generator.core.node.ReplaceMethodGenerator")
public boolean replace(Node node, Node replacementNode) {
if (node == null)
return false;
if (node == expression) {
setExpression((Expression) replacementNode);
return true;
}
return super.replace(node, replacementNode);
}
@Override
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public boolean isUnaryExpr() {
return true;
}
@Override
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public UnaryExpr asUnaryExpr() {
return this;
}
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public void ifUnaryExpr(Consumer<UnaryExpr> action) {
action.accept(this);
}
@Override
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public Optional<UnaryExpr> toUnaryExpr() {
return Optional.of(this);
}
}
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