001package ball.annotation.processing; 002/*- 003 * ########################################################################## 004 * Utilities 005 * $Id: For.java 6104 2020-06-03 18:26:30Z ball $ 006 * $HeadURL: svn+ssh://svn.hcf.dev/var/spool/scm/repository.svn/ball-util/trunk/src/main/java/ball/annotation/processing/For.java $ 007 * %% 008 * Copyright (C) 2008 - 2020 Allen D. Ball 009 * %% 010 * Licensed under the Apache License, Version 2.0 (the "License"); 011 * you may not use this file except in compliance with the License. 012 * You may obtain a copy of the License at 013 * 014 * http://www.apache.org/licenses/LICENSE-2.0 015 * 016 * Unless required by applicable law or agreed to in writing, software 017 * distributed under the License is distributed on an "AS IS" BASIS, 018 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 019 * See the License for the specific language governing permissions and 020 * limitations under the License. 021 * ########################################################################## 022 */ 023import ball.annotation.ServiceProviderFor; 024import java.lang.annotation.Annotation; 025import java.lang.annotation.Documented; 026import java.lang.annotation.Retention; 027import java.lang.annotation.Target; 028import javax.annotation.processing.Processor; 029import javax.annotation.processing.RoundEnvironment; 030import javax.lang.model.element.AnnotationMirror; 031import javax.lang.model.element.AnnotationValue; 032import javax.lang.model.element.Element; 033import javax.lang.model.element.TypeElement; 034import lombok.NoArgsConstructor; 035import lombok.ToString; 036 037import static java.lang.annotation.ElementType.TYPE; 038import static java.lang.annotation.RetentionPolicy.RUNTIME; 039import static javax.tools.Diagnostic.Kind.ERROR; 040 041/** 042 * {@link AnnotatedProcessor} {@link Annotation} to specify 043 * {@link Annotation}s. 044 * 045 * @author {@link.uri mailto:ball@hcf.dev Allen D. Ball} 046 * @version $Revision: 6104 $ 047 */ 048@Documented 049@Retention(RUNTIME) 050@Target({ TYPE }) 051@TargetMustExtend(AnnotatedProcessor.class) 052public @interface For { 053 Class<? extends Annotation>[] value() default { }; 054 055 /** 056 * {@link Processor} implementation. 057 */ 058 @ServiceProviderFor({ Processor.class }) 059 @For({ For.class }) 060 @NoArgsConstructor @ToString 061 public static class ProcessorImpl extends AnnotatedProcessor { 062 @Override 063 public void process(RoundEnvironment roundEnv, 064 TypeElement annotation, Element element) { 065 super.process(roundEnv, annotation, element); 066 067 AnnotationMirror mirror = getAnnotationMirror(element, annotation); 068 AnnotationValue value = getAnnotationValue(mirror, "value"); 069 070 if (isEmptyArray(value)) { 071 print(ERROR, element, mirror, value, "value() is empty"); 072 } 073 } 074 } 075}