/*
 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package processor;

import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.annotation.processing.SupportedSourceVersion;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.TypeElement;
import java.util.Set;
import javax.annotation.processing.RoundEnvironment;
import javax.tools.Diagnostic.Kind;
import javax.lang.model.element.AnnotationMirror;

@SupportedAnnotationTypes("annotation.ModuleWarn")
public class ModuleWarnProcessor extends AbstractProcessor {

    @Override
    public SourceVersion getSupportedSourceVersion() {
        return this.processingEnv.getSourceVersion().compareTo(SourceVersion.RELEASE_9) < 0 ? SourceVersion.RELEASE_9 : this.processingEnv.getSourceVersion();
    }

    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
        annotations.stream().flatMap(annotation -> roundEnv.getElementsAnnotatedWith(annotation).stream()).forEach(element -> {
            for(AnnotationMirror annotationMirror : element.getAnnotationMirrors()) {
                this.processingEnv.getMessager().printMessage(Kind.MANDATORY_WARNING, "Module warning", element, annotationMirror);
            }
        });
        return false;
    }
}

