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	/*
	* Copyright (C) 2007-2010 Júlio Vilmar Gesser.
	* Copyright (C) 2011, 2013-2021 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.TokenRange;
	import com.github.javaparser.ast.AllFieldsConstructor;
	import com.github.javaparser.ast.Generated;
	import com.github.javaparser.ast.Node;
	import com.github.javaparser.ast.NodeList;
	import com.github.javaparser.ast.nodeTypes.NodeWithArguments;
	import com.github.javaparser.ast.nodeTypes.NodeWithOptionalScope;
	import com.github.javaparser.ast.nodeTypes.NodeWithSimpleName;
	import com.github.javaparser.ast.nodeTypes.NodeWithTypeArguments;
	import com.github.javaparser.ast.observer.ObservableProperty;
	import com.github.javaparser.ast.stmt.ExplicitConstructorInvocationStmt;
	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.MethodCallExprMetaModel;
	import com.github.javaparser.metamodel.OptionalProperty;
	import com.github.javaparser.resolution.Resolvable;
	import com.github.javaparser.resolution.UnsolvedSymbolException;
	import com.github.javaparser.resolution.declarations.ResolvedMethodDeclaration;
	import com.github.javaparser.resolution.types.ResolvedType;
	import java.util.Optional;
	import java.util.function.Consumer;
	import static com.github.javaparser.utils.Utils.assertNotNull;

	/**
	* A method call on an object or a class. <br>{@code circle.circumference()} <br>In {@code a.<String>bb(15);}, a
	* is the scope, String is a type argument, bb is the name and 15 is an argument.
	*
	* @author Julio Vilmar Gesser
	*/
	public class MethodCallExpr extends Expression implements NodeWithTypeArguments<MethodCallExpr>, NodeWithArguments<MethodCallExpr>, NodeWithSimpleName<MethodCallExpr>, NodeWithOptionalScope<MethodCallExpr>, Resolvable<ResolvedMethodDeclaration> {

	@OptionalProperty
	private Expression scope;

	@OptionalProperty
	private NodeList<Type> typeArguments;

	private SimpleName name;

	private NodeList<Expression> arguments;

	public MethodCallExpr() {
	this(null, null, null, new SimpleName(), new NodeList<>());
	}

	public MethodCallExpr(String name, Expression... arguments) {
	this(null, null, null, new SimpleName(name), new NodeList<>(arguments));
	}

	public MethodCallExpr(final Expression scope, final String name) {
	this(null, scope, null, new SimpleName(name), new NodeList<>());
	}

	public MethodCallExpr(final Expression scope, final SimpleName name) {
	this(null, scope, null, name, new NodeList<>());
	}

	public MethodCallExpr(final Expression scope, final String name, final NodeList<Expression> arguments) {
	this(null, scope, null, new SimpleName(name), arguments);
	}

	public MethodCallExpr(final Expression scope, final NodeList<Type> typeArguments, final String name, final NodeList<Expression> arguments) {
	this(null, scope, typeArguments, new SimpleName(name), arguments);
	}

	public MethodCallExpr(final Expression scope, final SimpleName name, final NodeList<Expression> arguments) {
	this(null, scope, null, name, arguments);
	}

	@AllFieldsConstructor
	public MethodCallExpr(final Expression scope, final NodeList<Type> typeArguments, final SimpleName name, final NodeList<Expression> arguments) {
	this(null, scope, typeArguments, name, arguments);
	}

	/**
	* This constructor is used by the parser and is considered private.
	*/
	@Generated("com.github.javaparser.generator.core.node.MainConstructorGenerator")
	public MethodCallExpr(TokenRange tokenRange, Expression scope, NodeList<Type> typeArguments, SimpleName name, NodeList<Expression> arguments) {
	super(tokenRange);
	setScope(scope);
	setTypeArguments(typeArguments);
	setName(name);
	setArguments(arguments);
	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 NodeList<Expression> getArguments() {
	return arguments;
	}

	@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
	public SimpleName getName() {
	return name;
	}

	@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
	public Optional<Expression> getScope() {
	return Optional.ofNullable(scope);
	}

	@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
	public MethodCallExpr setArguments(final NodeList<Expression> arguments) {
	assertNotNull(arguments);
	if (arguments == this.arguments) {
	return this;
	}
	notifyPropertyChange(ObservableProperty.ARGUMENTS, this.arguments, arguments);
	if (this.arguments != null)
	this.arguments.setParentNode(null);
	this.arguments = arguments;
	setAsParentNodeOf(arguments);
	return this;
	}

	@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
	public MethodCallExpr setName(final SimpleName name) {
	assertNotNull(name);
	if (name == this.name) {
	return this;
	}
	notifyPropertyChange(ObservableProperty.NAME, this.name, name);
	if (this.name != null)
	this.name.setParentNode(null);
	this.name = name;
	setAsParentNodeOf(name);
	return this;
	}

	@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
	public MethodCallExpr setScope(final Expression scope) {
	if (scope == this.scope) {
	return 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 MethodCallExpr
	*/
	@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
	public MethodCallExpr setTypeArguments(final NodeList<Type> typeArguments) {
	if (typeArguments == this.typeArguments) {
	return this;
	}
	notifyPropertyChange(ObservableProperty.TYPE_ARGUMENTS, this.typeArguments, typeArguments);
	if (this.typeArguments != null)
	this.typeArguments.setParentNode(null);
	this.typeArguments = typeArguments;
	setAsParentNodeOf(typeArguments);
	return this;
	}

	@Override
	@Generated("com.github.javaparser.generator.core.node.RemoveMethodGenerator")
	public boolean remove(Node node) {
	if (node == null)
	return false;
	for (int i = 0; i < arguments.size(); i++) {
	if (arguments.get(i) == node) {
	arguments.remove(i);
	return true;
	}
	}
	if (scope != null) {
	if (node == scope) {
	removeScope();
	return true;
	}
	}
	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);
	}

	@Generated("com.github.javaparser.generator.core.node.RemoveMethodGenerator")
	public MethodCallExpr removeScope() {
	return setScope((Expression) null);
	}

	@Override
	@Generated("com.github.javaparser.generator.core.node.CloneGenerator")
	public MethodCallExpr clone() {
	return (MethodCallExpr) accept(new CloneVisitor(), null);
	}

	@Override
	@Generated("com.github.javaparser.generator.core.node.GetMetaModelGenerator")
	public MethodCallExprMetaModel getMetaModel() {
	return JavaParserMetaModel.methodCallExprMetaModel;
	}

	@Override
	@Generated("com.github.javaparser.generator.core.node.ReplaceMethodGenerator")
	public boolean replace(Node node, Node replacementNode) {
	if (node == null)
	return false;
	for (int i = 0; i < arguments.size(); i++) {
	if (arguments.get(i) == node) {
	arguments.set(i, (Expression) replacementNode);
	return true;
	}
	}
	if (node == name) {
	setName((SimpleName) replacementNode);
	return true;
	}
	if (scope != null) {
	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 isMethodCallExpr() {
	return true;
	}

	@Override
	@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
	public MethodCallExpr asMethodCallExpr() {
	return this;
	}

	@Override
	@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
	public void ifMethodCallExpr(Consumer<MethodCallExpr> action) {
	action.accept(this);
	}

	/**
	* Attempts to resolve the declaration corresponding to the invoked method. If successful, a
	* {@link ResolvedMethodDeclaration} representing the declaration of the constructor invoked by this
	* {@code MethodCallExpr} is returned. Otherwise, an {@link UnsolvedSymbolException} is thrown.
	*
	* @return a {@link ResolvedMethodDeclaration} representing the declaration of the invoked method.
	* @throws UnsolvedSymbolException if the declaration corresponding to the method call expression could not be
	* resolved.
	* @see NameExpr#resolve()
	* @see FieldAccessExpr#resolve()
	* @see ObjectCreationExpr#resolve()
	* @see ExplicitConstructorInvocationStmt#resolve()
	*/
	@Override
	public ResolvedMethodDeclaration resolve() {
	return getSymbolResolver().resolveDeclaration(this, ResolvedMethodDeclaration.class);
	}

	@Override
	@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
	public Optional<MethodCallExpr> toMethodCallExpr() {
	return Optional.of(this);
	}

	/*
	* A method invocation expression is a poly expression if all of the following are true:
	* 1. The invocation appears in an assignment context or an invocation context (§5.2, §5.3).
	* 2. If the invocation is qualified (that is, any form of MethodInvocation except for the first), then
	* the invocation elides TypeArguments to the left of the Identifier.
	* 3. The method to be invoked, as determined by the following subsections, is generic (§8.4.4) and has a
	* return type that mentions at least one of the method's type parameters.
	* Otherwise, the method invocation expression is a standalone expression.
	*/
	@Override
	public boolean isPolyExpression() {
	// A method invocation expression is a poly expression if all of the following are true:
	//
	// 1. The invocation appears in an assignment context or an invocation context (§5.2, §5.3).
	if (!(appearsInAssignmentContext() \|\| appearsInInvocationContext())) {
	return false;
	}
	// 2. If the invocation is qualified (that is, any form of MethodInvocation except for the form [MethodName (
	// [ArgumentList] )]), then the invocation elides TypeArguments to the left of the Identifier.
	if (isQualified() && !elidesTypeArguments()) {
	return false;
	}
	// 3. The method to be invoked, as determined by the following subsections, is generic (§8.4.4) and has a
	// return type that mentions at least one of the method's type parameters.
	// A method is generic if it declares one or more type variables (§4.4).
	if (isGenericMethod() && hasParameterwithSameTypeThanResultType(resolve().getReturnType())) {
	// it's a poly expression
	return true;
	}
	// Otherwise, the method invocation expression is a standalone expression.
	return false;
	}

	/*
	* A method is generic if it declares one or more type variables (§4.4).
	* Not sure it's enough to verify that the type arguments list is empty or not.
	*/
	private boolean isGenericMethod() {
	return getTypeArguments().isPresent() && !getTypeArguments().get().isEmpty();
	}

	/*
	* return true if at least one of the method's type parameters has the same type as the specified type .
	*/
	private boolean hasParameterwithSameTypeThanResultType(ResolvedType resolvedReturnType) {
	return getTypeArguments().isPresent() && getTypeArguments().get().stream().anyMatch(argType -> argType.resolve().isAssignableBy(resolvedReturnType));
	}

	/*
	* Returns true if the expression is an invocation context.
	* https://docs.oracle.com/javase/specs/jls/se8/html/jls-5.html#jls-5.3
	* 5.3. Invocation Contexts
	*/
	@Override
	protected boolean isInvocationContext() {
	return true;
	}
	}

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