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annotate graal/com.oracle.jvmci.runtime.processor/src/com/oracle/jvmci/runtime/processor/ServiceProviderProcessor.java @ 21551:5324104ac4f3

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moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Tue, 26 May 2015 17:13:37 +0200
parents d3002f7bd223
children
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1 /*
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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5 * This code is free software; you can redistribute it and/or modify it
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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6 * under the terms of the GNU General Public License version 2 only, as
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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7 * published by the Free Software Foundation.
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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8 *
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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12 * version 2 for more details (a copy is included in the LICENSE file that
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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13 * accompanied this code).
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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14 *
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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15 * You should have received a copy of the GNU General Public License version
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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16 * 2 along with this work; if not, write to the Free Software Foundation,
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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18 *
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
dc9cfb7ec5d0 Annotation processor for generating META-INF/services files.
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.jvmci.runtime.processor;
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24
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25 import java.io.*;
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26 import java.util.*;
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27
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28 import javax.annotation.processing.*;
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29 import javax.lang.model.*;
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30 import javax.lang.model.element.*;
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31 import javax.lang.model.type.*;
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32 import javax.tools.Diagnostic.Kind;
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33 import javax.tools.*;
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34
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35 import com.oracle.jvmci.runtime.*;
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37 @SupportedAnnotationTypes("com.oracle.jvmci.runtime.ServiceProvider")
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38 public class ServiceProviderProcessor extends AbstractProcessor {
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39
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40 private final Set<TypeElement> processed = new HashSet<>();
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41
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42 @Override
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43 public SourceVersion getSupportedSourceVersion() {
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44 return SourceVersion.latest();
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45 }
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46
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47 private boolean verifyAnnotation(TypeMirror serviceInterface, TypeElement serviceProvider) {
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48 if (!processingEnv.getTypeUtils().isSubtype(serviceProvider.asType(), serviceInterface)) {
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49 String msg = String.format("Service provider class %s doesn't implement service interface %s", serviceProvider.getSimpleName(), serviceInterface);
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50 processingEnv.getMessager().printMessage(Kind.ERROR, msg, serviceProvider);
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51 return false;
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52 }
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53
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54 return true;
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55 }
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56
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57 private void processElement(TypeElement serviceProvider) {
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58 if (processed.contains(serviceProvider)) {
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59 return;
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60 }
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61
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62 processed.add(serviceProvider);
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63 ServiceProvider annotation = serviceProvider.getAnnotation(ServiceProvider.class);
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64 if (annotation != null) {
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65 try {
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66 annotation.value();
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67 } catch (MirroredTypeException ex) {
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68 TypeMirror serviceInterface = ex.getTypeMirror();
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69 if (verifyAnnotation(serviceInterface, serviceProvider)) {
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70 String interfaceName = ex.getTypeMirror().toString();
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71 createProviderFile(serviceProvider, interfaceName);
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72 }
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73 }
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74 }
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75 }
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76
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77 private void createProviderFile(TypeElement serviceProvider, String interfaceName) {
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78 if (serviceProvider.getNestingKind().isNested()) {
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79 // This is a simplifying constraint that means we don't have to
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80 // processed the qualified name to insert '$' characters at
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81 // the relevant positions.
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82 String msg = String.format("Service provider class %s must be a top level class", serviceProvider.getSimpleName());
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83 processingEnv.getMessager().printMessage(Kind.ERROR, msg, serviceProvider);
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84 return;
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85 }
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86
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87 String filename = "META-INF/providers/" + serviceProvider.getQualifiedName();
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88 try {
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89 FileObject file = processingEnv.getFiler().createResource(StandardLocation.CLASS_OUTPUT, "", filename, serviceProvider);
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90 PrintWriter writer = new PrintWriter(new OutputStreamWriter(file.openOutputStream(), "UTF-8"));
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91 writer.println(interfaceName);
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92 writer.close();
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93 } catch (IOException e) {
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94 processingEnv.getMessager().printMessage(Kind.ERROR, e.getMessage(), serviceProvider);
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95 }
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96 }
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97
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98 @Override
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99 public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
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100 if (roundEnv.processingOver()) {
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101 return true;
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102 }
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103
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104 for (Element element : roundEnv.getElementsAnnotatedWith(ServiceProvider.class)) {
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105 assert element.getKind().isClass();
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106 processElement((TypeElement) element);
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107 }
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108
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109 return true;
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110 }
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111 }