net.openhft.chronicle.values.FieldNullability Maven / Gradle / Ivy
/*
* Copyright 2016-2021 chronicle.software
*
* https://chronicle.software
*
* 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 net.openhft.chronicle.values;
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;
import static net.openhft.chronicle.values.Nullability.NULLABLE;
/**
* This class exists for DRY between {@link EnumFieldModel} and {@link CharSequenceFieldModel}.
*/
final class FieldNullability {
final FieldModel model;
/**
* Default is {@link Nullability#NULLABLE}, but not set, to distinguish "not set explicitly
* case"
*/
Nullability nullability;
FieldNullability(FieldModel model) {
this.model = model;
}
Nullability nullability() {
return nullability != null ? nullability : NULLABLE;
}
public void addInfo(Method m, MethodTemplate template) {
Parameter annotatedParameter = template.annotatedParameter.apply(m);
if (annotatedParameter == null)
return;
Nullability explicitNullability = Nullability.explicitNullability(annotatedParameter);
if (explicitNullability != null) {
if (nullability != null && nullability != explicitNullability) {
throw new IllegalStateException("Conflicting explicit nullability in parameters " +
"of methods accessing field " + model.name);
}
nullability = explicitNullability;
}
}
}