1 /*
   2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import javax.annotation.processing.AbstractProcessor;
  25 import javax.annotation.processing.RoundEnvironment;
  26 import javax.annotation.processing.SupportedAnnotationTypes;
  27 import javax.annotation.processing.SupportedOptions;
  28 import javax.lang.model.element.ModuleElement;
  29 import javax.lang.model.element.TypeElement;
  30 import java.util.Objects;
  31 import java.util.Set;
  32 import java.util.stream.Collectors;
  33 
  34 @SupportedAnnotationTypes("*")
  35 @SupportedOptions("expectedAnnotations")
  36 public final class ProxyTypeValidator extends AbstractProcessor {
  37 
  38     @Override
  39     public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
  40         ModuleElement m = processingEnv.getElementUtils().getModuleElement("m");
  41         String actualTypes = m.getAnnotationMirrors()
  42             .stream()
  43             .map(am -> am.toString())
  44             .collect(Collectors.joining(", "));
  45         if (!Objects.equals(actualTypes, processingEnv.getOptions().get("expectedAnnotations"))) {
  46             throw new IllegalStateException("Expected annotations not found, actual: " + actualTypes);
  47         }
  48         return false;
  49     }
  50 }