io.micronaut.validation.executable.ExecutableVisitor Maven / Gradle / Ivy
/*
* Copyright 2017-2020 original authors
*
* 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
*
* https://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 io.micronaut.validation.executable;
import io.micronaut.context.annotation.Executable;
import io.micronaut.core.annotation.Internal;
import io.micronaut.core.annotation.NonNull;
import io.micronaut.inject.ast.MethodElement;
import io.micronaut.inject.ast.ParameterElement;
import io.micronaut.inject.visitor.TypeElementVisitor;
import io.micronaut.inject.visitor.VisitorContext;
/**
* A {@link io.micronaut.inject.visitor.TypeElementVisitor} that validates primitive types can't have a Nullable annotation.
*
* @author Iván López
* @since 2.0.1
*/
@Internal
public class ExecutableVisitor implements TypeElementVisitor {
@NonNull
@Override
public VisitorKind getVisitorKind() {
return VisitorKind.ISOLATING;
}
@Override
public void visitMethod(MethodElement element, VisitorContext context) {
ParameterElement[] parameters = element.getParameters();
for (ParameterElement parameter : parameters) {
if (parameter.getType().isPrimitive() && parameter.isNullable()) {
context.warn("@Nullable on primitive types will allow the method to be executed at runtime with null values, causing an exception", parameter);
}
}
}
}