72 lines
2.8 KiB
Java
72 lines
2.8 KiB
Java
/*
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* Copyright 2017 Google Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import static java.util.stream.Collectors.joining;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Set;
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import javax.annotation.processing.RoundEnvironment;
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import javax.annotation.processing.SupportedAnnotationTypes;
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import javax.lang.model.element.Element;
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import javax.lang.model.element.ExecutableElement;
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import javax.lang.model.element.VariableElement;
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import javax.lang.model.element.TypeElement;
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@SupportedAnnotationTypes("MethodParameterProcessor.ParameterNames")
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public class MethodParameterProcessor extends JavacTestingAbstractProcessor {
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@Retention(RetentionPolicy.RUNTIME)
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@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
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@interface ParameterNames {
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String[] value() default {};
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}
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@Override
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public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
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for (Element element : roundEnv.getElementsAnnotatedWith(ParameterNames.class)) {
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ExecutableElement exec = (ExecutableElement)element;
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String message = printNamesAndAnnotations(exec);
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messager.printNote(message);
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}
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return false;
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}
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private String printNamesAndAnnotations(ExecutableElement exec) {
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return String.format("%s.%s(%s)",
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exec.getEnclosingElement(),
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exec.getSimpleName(),
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exec.getParameters().stream().map(this::printParameter).collect(joining(", ")));
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}
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private String printParameter(VariableElement param) {
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return param.getAnnotationMirrors().stream().map(String::valueOf).collect(joining(" "))
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+ (param.getAnnotationMirrors().isEmpty() ? "" : " ")
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+ param.getSimpleName();
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}
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}
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