| /* |
| * Copyright (c) 2013, 2015, 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 org.graalvm.compiler.replacements.verifier; |
| |
| import java.lang.annotation.Annotation; |
| |
| import javax.annotation.processing.ProcessingEnvironment; |
| import javax.lang.model.element.AnnotationMirror; |
| import javax.lang.model.element.AnnotationValue; |
| import javax.lang.model.element.Element; |
| import javax.lang.model.element.TypeElement; |
| import javax.lang.model.type.DeclaredType; |
| import javax.lang.model.type.TypeKind; |
| import javax.lang.model.type.TypeMirror; |
| import javax.tools.Diagnostic.Kind; |
| |
| import org.graalvm.compiler.api.replacements.ClassSubstitution; |
| |
| public final class ClassSubstitutionVerifier extends AbstractVerifier { |
| |
| private static final String TYPE_VALUE = "value"; |
| private static final String STRING_VALUE = "className"; |
| private static final String OPTIONAL = "optional"; |
| |
| public ClassSubstitutionVerifier(ProcessingEnvironment env) { |
| super(env); |
| } |
| |
| @Override |
| public Class<? extends Annotation> getAnnotationClass() { |
| return ClassSubstitution.class; |
| } |
| |
| @Override |
| public void verify(Element element, AnnotationMirror classSubstitution, PluginGenerator generator) { |
| if (!element.getKind().isClass()) { |
| assert false : "Element is guaranteed to be a class."; |
| return; |
| } |
| TypeElement type = (TypeElement) element; |
| |
| TypeElement substitutionType = resolveOriginalType(env, type, classSubstitution); |
| if (substitutionType == null) { |
| return; |
| } |
| } |
| |
| static TypeElement resolveOriginalType(ProcessingEnvironment env, Element sourceElement, AnnotationMirror classSubstition) { |
| AnnotationValue typeValue = findAnnotationValue(classSubstition, TYPE_VALUE); |
| AnnotationValue stringValue = findAnnotationValue(classSubstition, STRING_VALUE); |
| AnnotationValue optionalValue = findAnnotationValue(classSubstition, OPTIONAL); |
| |
| assert typeValue != null && stringValue != null && optionalValue != null; |
| |
| TypeMirror type = resolveAnnotationValue(TypeMirror.class, typeValue); |
| String[] classNames = resolveAnnotationValue(String[].class, stringValue); |
| boolean optional = resolveAnnotationValue(Boolean.class, optionalValue); |
| |
| if (type.getKind() != TypeKind.DECLARED) { |
| env.getMessager().printMessage(Kind.ERROR, "The provided class must be a declared type.", sourceElement, classSubstition, typeValue); |
| return null; |
| } |
| |
| if (!classSubstition.getAnnotationType().asElement().equals(((DeclaredType) type).asElement())) { |
| if (classNames.length != 0) { |
| String msg = "The usage of value and className is exclusive."; |
| env.getMessager().printMessage(Kind.ERROR, msg, sourceElement, classSubstition, stringValue); |
| env.getMessager().printMessage(Kind.ERROR, msg, sourceElement, classSubstition, typeValue); |
| } |
| |
| return (TypeElement) ((DeclaredType) type).asElement(); |
| } |
| |
| if (classNames.length != 0) { |
| TypeElement typeElement = null; |
| for (String className : classNames) { |
| typeElement = env.getElementUtils().getTypeElement(className); |
| if (typeElement == null && !optional) { |
| env.getMessager().printMessage(Kind.ERROR, String.format("The class '%s' was not found on the classpath.", stringValue), sourceElement, classSubstition, stringValue); |
| } |
| } |
| |
| return typeElement; |
| } |
| |
| if (!optional) { |
| env.getMessager().printMessage(Kind.ERROR, String.format("No value for '%s' or '%s' provided but required.", TYPE_VALUE, STRING_VALUE), sourceElement, classSubstition); |
| } |
| |
| return null; |
| } |
| |
| } |