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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.nodeTypes;
import com.github.javaparser.ast.Node;
import com.github.javaparser.ast.NodeList;
import com.github.javaparser.ast.type.Type;
import com.github.javaparser.metamodel.DerivedProperty;
import java.util.Optional;
import static com.github.javaparser.ast.NodeList.nodeList;
/**
* A node that can have type arguments.
* <p>
* <pre>
* new X(); --> typeArguments == Optional is empty
* new X<>(); --> typeArguments = [], diamondOperator = true
* new X<C,D>(); --> typeArguments = [C,D], diamondOperator = false
* </pre>
*/
public interface NodeWithTypeArguments<N extends Node> {
/**
* @return the types that can be found in the type arguments: <String, Integer>.
*/
Optional<NodeList<Type>> getTypeArguments();
/**
* Allows you to set the generic arguments
*
* @param typeArguments The list of types of the generics, can be null
*/
N setTypeArguments(NodeList<Type> typeArguments);
/**
* @return whether the type arguments look like <>.
*/
@DerivedProperty
default boolean isUsingDiamondOperator() {
return getTypeArguments().isPresent() && getTypeArguments().get().isEmpty();
}
/**
* Sets the type arguments to <>.
*/
@SuppressWarnings("unchecked")
default N setDiamondOperator() {
return setTypeArguments(new NodeList<>());
}
/**
* Removes all type arguments, including the surrounding <>.
*/
@SuppressWarnings("unchecked")
default N removeTypeArguments() {
return setTypeArguments((NodeList<Type>) null);
}
@SuppressWarnings("unchecked")
default N setTypeArguments(Type... typeArguments) {
return setTypeArguments(nodeList(typeArguments));
}
}
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