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/*
* 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;
import com.github.javaparser.resolution.types.ResolvedType;
/**
* This is a virtual type used to represent null values.
*
* @author Federico Tomassetti
*/
public class NullType implements ResolvedType {
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(ResolvedType other) {
throw new UnsupportedOperationException("It does not make sense to assign a value to null, it can only be assigned");
}
}
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