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.lang.annotation.Documented;
023import java.lang.annotation.Retention;
024import java.lang.annotation.Target;
025import javax.annotation.processing.Processor;
026import javax.lang.model.element.Modifier;
027import lombok.NoArgsConstructor;
028import lombok.ToString;
029
030import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
031import static java.lang.annotation.RetentionPolicy.RUNTIME;
032import static javax.lang.model.element.Modifier.PUBLIC;
033
034/**
035 * {@link java.lang.annotation.Annotation} to specify annotated
036 * {@link Class} must have a corresponding constructor.  The default values
037 * correspond to a public no-argument constructor.
038 *
039 * @see AnnotatedProcessor
040 *
041 * @author {@link.uri mailto:ball@hcf.dev Allen D. Ball}
042 */
043@Documented
044@Retention(RUNTIME)
045@Target(ANNOTATION_TYPE)
046public @interface TargetMustHaveConstructor {
047    Modifier value() default PUBLIC;
048    Class<?>[] parameters() default { };
049
050    /**
051     * {@link Processor} implementation.
052     */
053    @ServiceProviderFor({ Processor.class })
054    @For({ TargetMustHaveConstructor.class })
055    @NoArgsConstructor @ToString
056    public static class ProcessorImpl extends AnnotatedProcessor {
057    }
058}