001package ball.annotation.processing;
002/*-
003 * ##########################################################################
004 * Utilities
005 * %%
006 * Copyright (C) 2008 - 2022 Allen D. Ball
007 * %%
008 * Licensed under the Apache License, Version 2.0 (the "License");
009 * you may not use this file except in compliance with the License.
010 * You may obtain a copy of the License at
011 *
012 *      http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing, software
015 * distributed under the License is distributed on an "AS IS" BASIS,
016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017 * See the License for the specific language governing permissions and
018 * limitations under the License.
019 * ##########################################################################
020 */
021import ball.annotation.ServiceProviderFor;
022import java.beans.ConstructorProperties;
023import java.util.List;
024import java.util.Objects;
025import java.util.Set;
026import java.util.stream.Stream;
027import javax.annotation.processing.Processor;
028import javax.annotation.processing.RoundEnvironment;
029import javax.lang.model.element.AnnotationMirror;
030import javax.lang.model.element.AnnotationValue;
031import javax.lang.model.element.Element;
032import javax.lang.model.element.ExecutableElement;
033import javax.lang.model.element.TypeElement;
034import javax.lang.model.element.VariableElement;
035import lombok.NoArgsConstructor;
036import lombok.ToString;
037import org.apache.commons.lang3.StringUtils;
038
039import static java.util.stream.Collectors.toList;
040import static javax.tools.Diagnostic.Kind.ERROR;
041import static javax.tools.Diagnostic.Kind.WARNING;
042
043/**
044 * {@link Processor} implementation to verify {@link ConstructorProperties}
045 * annotation are actual bean properties of the
046 * {@link java.lang.reflect.Constructor}'s {@link Class}.
047 *
048 * @author {@link.uri mailto:ball@hcf.dev Allen D. Ball}
049 */
050@ServiceProviderFor({ Processor.class })
051@For({ ConstructorProperties.class })
052@NoArgsConstructor @ToString
053public class ConstructorPropertiesProcessor extends AnnotatedProcessor {
054    @Override
055    public void process(RoundEnvironment roundEnv, TypeElement annotation, Element element) {
056        super.process(roundEnv, annotation, element);
057
058        AnnotationMirror mirror = getAnnotationMirror(element, annotation);
059        AnnotationValue value = getAnnotationValue(mirror, "value");
060        List<String> names =
061            Stream.of(value)
062            .filter(Objects::nonNull)
063            .map(t -> (List<?>) t.getValue())
064            .flatMap(List::stream)
065            .map(t -> (AnnotationValue) t)
066            .map(t -> (String) t.getValue())
067            .collect(toList());
068        List<? extends VariableElement> parameters = ((ExecutableElement) element).getParameters();
069
070        if (names.size() != parameters.size()) {
071            print(WARNING, element, mirror, value, "value() does not match %s parameters", element.getKind());
072        }
073
074        TypeElement type = (TypeElement) element.getEnclosingElement();
075        Set<String> properties = getPropertyNames(type);
076
077        names.stream()
078            .filter(StringUtils::isNotEmpty)
079            .filter(t -> (! properties.contains(t)))
080            .forEach(t -> print(WARNING, element, mirror, "bean property '%s' not defined", t));
081    }
082}