| /* |
| * Copyright 2016 Federico Tomassetti |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.github.javaparser.symbolsolver.model.typesystem; |
| |
| /** |
| * This is a virtual type used to represent null values. |
| * |
| * @author Federico Tomassetti |
| */ |
| public class NullType implements Type { |
| |
| public static final NullType INSTANCE = new NullType(); |
| |
| private NullType() { |
| // prevent instantiation |
| } |
| |
| @Override |
| public boolean isArray() { |
| return false; |
| } |
| |
| @Override |
| public boolean isPrimitive() { |
| return false; |
| } |
| |
| public boolean isNull() { |
| return true; |
| } |
| |
| @Override |
| public boolean isReferenceType() { |
| return false; |
| } |
| |
| @Override |
| public String describe() { |
| return "null"; |
| } |
| |
| @Override |
| public boolean isTypeVariable() { |
| return false; |
| } |
| |
| @Override |
| public boolean isAssignableBy(Type other) { |
| throw new UnsupportedOperationException("It does not make sense to assign a value to null, it can only be assigned"); |
| } |
| |
| } |