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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.NodeList;
import com.github.javaparser.ast.nodeTypes.NodeWithIdentifier;
import com.github.javaparser.ast.nodeTypes.NodeWithTypeArguments;
import com.github.javaparser.ast.observer.ObservableProperty;
import com.github.javaparser.ast.type.Type;
import com.github.javaparser.ast.visitor.GenericVisitor;
import com.github.javaparser.ast.visitor.VoidVisitor;
import java.util.Arrays;
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 com.github.javaparser.ast.Node;
import com.github.javaparser.ast.visitor.CloneVisitor;
import com.github.javaparser.metamodel.MethodReferenceExprMetaModel;
import com.github.javaparser.metamodel.JavaParserMetaModel;
import com.github.javaparser.metamodel.NonEmptyProperty;
import javax.annotation.Generated;
import com.github.javaparser.TokenRange;
import com.github.javaparser.metamodel.OptionalProperty;
import java.util.function.Consumer;
/**
* Method reference expressions introduced in Java 8 specifically designed to simplify lambda Expressions.
* Note that the field "identifier", indicating the word to the right of the ::, is not always a method name,
* it can be "new".
* <br/>In <code>System.out::println;</code> the scope is System.out and the identifier is "println"
* <br/><code>(test ? stream.map(String::trim) : stream)::toArray;</code>
* <br/>In <code>Bar<String>::<Integer>new</code> the String type argument is on the scope,
* and the Integer type argument is on this MethodReferenceExpr.
*
* @author Raquel Pau
*/
public final class MethodReferenceExpr extends Expression implements NodeWithTypeArguments<MethodReferenceExpr>, NodeWithIdentifier<MethodReferenceExpr> {
private Expression scope;
@OptionalProperty
private NodeList<Type> typeArguments;
@NonEmptyProperty
private String identifier;
public MethodReferenceExpr() {
this(null, new ClassExpr(), null, "empty");
}
@AllFieldsConstructor
public MethodReferenceExpr(Expression scope, NodeList<Type> typeArguments, String identifier) {
this(null, scope, typeArguments, identifier);
}
/**
* This constructor is used by the parser and is considered private.
*/
@Generated("com.github.javaparser.generator.core.node.MainConstructorGenerator")
public MethodReferenceExpr(TokenRange tokenRange, Expression scope, NodeList<Type> typeArguments, String identifier) {
super(tokenRange);
setScope(scope);
setTypeArguments(typeArguments);
setIdentifier(identifier);
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 getScope() {
return scope;
}
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public MethodReferenceExpr setScope(final Expression scope) {
assertNotNull(scope);
if (scope == this.scope) {
return (MethodReferenceExpr) this;
}
notifyPropertyChange(ObservableProperty.SCOPE, this.scope, scope);
if (this.scope != null)
this.scope.setParentNode(null);
this.scope = scope;
setAsParentNodeOf(scope);
return this;
}
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public Optional<NodeList<Type>> getTypeArguments() {
return Optional.ofNullable(typeArguments);
}
/**
* Sets the typeArguments
*
* @param typeArguments the typeArguments, can be null
* @return this, the MethodReferenceExpr
*/
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public MethodReferenceExpr setTypeArguments(final NodeList<Type> typeArguments) {
if (typeArguments == this.typeArguments) {
return (MethodReferenceExpr) this;
}
notifyPropertyChange(ObservableProperty.TYPE_ARGUMENTS, this.typeArguments, typeArguments);
if (this.typeArguments != null)
this.typeArguments.setParentNode(null);
this.typeArguments = typeArguments;
setAsParentNodeOf(typeArguments);
return this;
}
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public String getIdentifier() {
return identifier;
}
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public MethodReferenceExpr setIdentifier(final String identifier) {
assertNonEmpty(identifier);
if (identifier == this.identifier) {
return (MethodReferenceExpr) this;
}
notifyPropertyChange(ObservableProperty.IDENTIFIER, this.identifier, identifier);
this.identifier = identifier;
return this;
}
@Override
@Generated("com.github.javaparser.generator.core.node.RemoveMethodGenerator")
public boolean remove(Node node) {
if (node == null)
return false;
if (typeArguments != null) {
for (int i = 0; i < typeArguments.size(); i++) {
if (typeArguments.get(i) == node) {
typeArguments.remove(i);
return true;
}
}
}
return super.remove(node);
}
@Override
@Generated("com.github.javaparser.generator.core.node.CloneGenerator")
public MethodReferenceExpr clone() {
return (MethodReferenceExpr) accept(new CloneVisitor(), null);
}
@Override
@Generated("com.github.javaparser.generator.core.node.GetMetaModelGenerator")
public MethodReferenceExprMetaModel getMetaModel() {
return JavaParserMetaModel.methodReferenceExprMetaModel;
}
@Override
@Generated("com.github.javaparser.generator.core.node.ReplaceMethodGenerator")
public boolean replace(Node node, Node replacementNode) {
if (node == null)
return false;
if (node == scope) {
setScope((Expression) replacementNode);
return true;
}
if (typeArguments != null) {
for (int i = 0; i < typeArguments.size(); i++) {
if (typeArguments.get(i) == node) {
typeArguments.set(i, (Type) replacementNode);
return true;
}
}
}
return super.replace(node, replacementNode);
}
@Override
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public boolean isMethodReferenceExpr() {
return true;
}
@Override
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public MethodReferenceExpr asMethodReferenceExpr() {
return this;
}
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public void ifMethodReferenceExpr(Consumer<MethodReferenceExpr> action) {
action.accept(this);
}
@Override
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public Optional<MethodReferenceExpr> toMethodReferenceExpr() {
return Optional.of(this);
}
}
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