001package ball.annotation.processing; 002/*- 003 * ########################################################################## 004 * Utilities 005 * $Id: MatcherGroupProcessor.java 5905 2020-05-11 01:35:29Z ball $ 006 * $HeadURL: svn+ssh://svn.hcf.dev/var/spool/scm/repository.svn/ball-util/trunk/src/main/java/ball/annotation/processing/MatcherGroupProcessor.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.MatcherGroup; 024import ball.annotation.ServiceProviderFor; 025import javax.annotation.processing.Processor; 026import javax.annotation.processing.RoundEnvironment; 027import javax.lang.model.element.AnnotationMirror; 028import javax.lang.model.element.AnnotationValue; 029import javax.lang.model.element.Element; 030import javax.lang.model.element.ExecutableElement; 031import javax.lang.model.element.TypeElement; 032import lombok.NoArgsConstructor; 033import lombok.ToString; 034 035import static javax.lang.model.element.Modifier.PRIVATE; 036import static javax.tools.Diagnostic.Kind.ERROR; 037 038/** 039 * {@link Processor} implementation to check {@link MatcherGroup} 040 * annotations. 041 * 042 * @author {@link.uri mailto:ball@hcf.dev Allen D. Ball} 043 * @version $Revision: 5905 $ 044 */ 045@ServiceProviderFor({ Processor.class }) 046@For({ MatcherGroup.class }) 047@NoArgsConstructor @ToString 048public class MatcherGroupProcessor extends AnnotatedProcessor { 049 @Override 050 protected void process(RoundEnvironment roundEnv, 051 TypeElement annotation, Element element) { 052 super.process(roundEnv, annotation, element); 053 054 AnnotationMirror mirror = getAnnotationMirror(element, annotation); 055 AnnotationValue value = getAnnotationValue(mirror, "value"); 056 int group = (Integer) value.getValue(); 057 058 if (group < 0) { 059 print(ERROR, element, mirror, value, 060 "value() must be non-negative"); 061 } 062 063 switch (element.getKind()) { 064 case ANNOTATION_TYPE: 065 case FIELD: 066 default: 067 break; 068 069 case METHOD: 070 ExecutableElement executable = (ExecutableElement) element; 071 072 if (withoutModifiers(PRIVATE).test(element)) { 073 if (executable.isVarArgs() || executable.getParameters().size() != 1) { 074 print(ERROR, element, 075 "@%s: %s must take exactly one argument", 076 annotation.getSimpleName(), element.getKind()); 077 } 078 } else { 079 print(ERROR, element, 080 "@%s: %s is %s", 081 annotation.getSimpleName(), element.getKind(), PRIVATE); 082 } 083 break; 084 } 085 } 086}