diff options
Diffstat (limited to 'javaparser-symbol-solver-model/src/main/java/com/github/javaparser/symbolsolver/model/typesystem')
-rw-r--r-- | javaparser-symbol-solver-model/src/main/java/com/github/javaparser/symbolsolver/model/typesystem/NullType.java | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/javaparser-symbol-solver-model/src/main/java/com/github/javaparser/symbolsolver/model/typesystem/NullType.java b/javaparser-symbol-solver-model/src/main/java/com/github/javaparser/symbolsolver/model/typesystem/NullType.java new file mode 100644 index 000000000..4fccfaad1 --- /dev/null +++ b/javaparser-symbol-solver-model/src/main/java/com/github/javaparser/symbolsolver/model/typesystem/NullType.java @@ -0,0 +1,68 @@ +/* + * 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"); + } + +} |