001package ball.tools.javac; 002/*- 003 * ########################################################################## 004 * Utilities 005 * $Id: JavacPluginName.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/tools/javac/JavacPluginName.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 ball.annotation.processing.AnnotatedProcessor; 025import ball.annotation.processing.For; 026import ball.annotation.processing.TargetMustExtend; 027import java.lang.annotation.Documented; 028import java.lang.annotation.Retention; 029import java.lang.annotation.Target; 030import javax.annotation.processing.Processor; 031import javax.annotation.processing.RoundEnvironment; 032import javax.lang.model.element.AnnotationMirror; 033import javax.lang.model.element.AnnotationValue; 034import javax.lang.model.element.Element; 035import javax.lang.model.element.TypeElement; 036import lombok.NoArgsConstructor; 037import lombok.ToString; 038 039import static java.lang.annotation.ElementType.TYPE; 040import static java.lang.annotation.RetentionPolicy.RUNTIME; 041import static javax.lang.model.element.Modifier.ABSTRACT; 042import static javax.tools.Diagnostic.Kind.ERROR; 043import static org.apache.commons.lang3.StringUtils.isEmpty; 044 045/** 046 * {@link java.lang.annotation.Annotation} to mark 047 * {@link com.sun.source.util.Plugin}s with their name. 048 * 049 * @author {@link.uri mailto:ball@hcf.dev Allen D. Ball} 050 * @version $Revision: 6104 $ 051 */ 052@Documented 053@Retention(RUNTIME) 054@Target({ TYPE }) 055@TargetMustExtend(AnnotatedJavacPlugin.class) 056public @interface JavacPluginName { 057 String value(); 058 059 /** 060 * {@link Processor} implementation. 061 */ 062 @ServiceProviderFor({ Processor.class }) 063 @For({ JavacPluginName.class }) 064 @NoArgsConstructor @ToString 065 public class ProcessorImpl extends AnnotatedProcessor { 066 @Override 067 protected void process(RoundEnvironment roundEnv, 068 TypeElement annotation, Element element) { 069 super.process(roundEnv, annotation, element); 070 071 AnnotationMirror mirror = getAnnotationMirror(element, annotation); 072 AnnotationValue value = getAnnotationValue(mirror, "value"); 073 String name = (String) value.getValue(); 074 075 if (! name.isEmpty()) { 076 if (element.getModifiers().contains(ABSTRACT)) { 077 print(ERROR, element, mirror, 078 "%s is %s", element.getKind(), ABSTRACT); 079 } 080 } else { 081 print(ERROR, element, mirror, value, 082 "value() must be a non-empty String"); 083 } 084 } 085 } 086}