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- /*
- * Copyright (C) 2012-present the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package org.pf4j.util;
-
- import javax.lang.model.element.AnnotationMirror;
- import javax.lang.model.element.AnnotationValue;
- import javax.lang.model.element.ExecutableElement;
- import javax.lang.model.element.TypeElement;
- import java.util.ArrayList;
- import java.util.List;
- import java.util.Map;
-
- /**
- * @author Decebal Suiu
- */
- public class ClassUtils {
-
- private ClassUtils() {}
-
- public static List<String> getAllInterfacesNames(Class<?> aClass) {
- return toString(getAllInterfaces(aClass));
- }
-
- public static List<Class<?>> getAllInterfaces(Class<?> aClass) {
- List<Class<?>> list = new ArrayList<>();
-
- while (aClass != null) {
- Class<?>[] interfaces = aClass.getInterfaces();
- for (Class<?> anInterface : interfaces) {
- if (!list.contains(anInterface)) {
- list.add(anInterface);
- }
-
- List<Class<?>> superInterfaces = getAllInterfaces(anInterface);
- for (Class<?> superInterface : superInterfaces) {
- if (!list.contains(superInterface)) {
- list.add(superInterface);
- }
- }
- }
-
- aClass = aClass.getSuperclass();
- }
-
- return list;
- }
-
- /**
- * Get a certain annotation of a {@link TypeElement}.
- * See <a href="https://stackoverflow.com/a/10167558">stackoverflow.com</a> for more information.
- *
- * @param typeElement the type element, that contains the requested annotation
- * @param annotationClass the class of the requested annotation
- * @return the requested annotation or null, if no annotation of the provided class was found
- * @throws NullPointerException if <code>typeElement</code> or <code>annotationClass</code> is null
- */
- public static AnnotationMirror getAnnotationMirror(TypeElement typeElement, Class<?> annotationClass) {
- String annotationClassName = annotationClass.getName();
- for (AnnotationMirror m : typeElement.getAnnotationMirrors()) {
- if (m.getAnnotationType().toString().equals(annotationClassName)) {
- return m;
- }
- }
-
- return null;
- }
-
- /**
- * Get a certain parameter of an {@link AnnotationMirror}.
- * See <a href="https://stackoverflow.com/a/10167558">stackoverflow.com</a> for more information.
- *
- * @param annotationMirror the annotation, that contains the requested parameter
- * @param annotationParameter the name of the requested annotation parameter
- * @return the requested parameter or null, if no parameter of the provided name was found
- * @throws NullPointerException if <code>annotationMirror</code> is null
- */
- public static AnnotationValue getAnnotationValue(AnnotationMirror annotationMirror, String annotationParameter) {
- for (Map.Entry<? extends ExecutableElement, ? extends AnnotationValue> entry : annotationMirror.getElementValues().entrySet()) {
- if (entry.getKey().getSimpleName().toString().equals(annotationParameter)) {
- return entry.getValue();
- }
- }
-
- return null;
- }
-
- /**
- * Get a certain annotation parameter of a {@link TypeElement}.
- * See <a href="https://stackoverflow.com/a/10167558">stackoverflow.com</a> for more information.
- *
- * @param typeElement the type element, that contains the requested annotation
- * @param annotationClass the class of the requested annotation
- * @param annotationParameter the name of the requested annotation parameter
- * @return the requested parameter or null, if no annotation for the provided class was found or no annotation parameter was found
- * @throws NullPointerException if <code>typeElement</code> or <code>annotationClass</code> is null
- */
- public static AnnotationValue getAnnotationValue(TypeElement typeElement, Class<?> annotationClass, String annotationParameter) {
- AnnotationMirror annotationMirror = getAnnotationMirror(typeElement, annotationClass);
- return annotationMirror != null ? getAnnotationValue(annotationMirror, annotationParameter) : null;
- }
-
- /**
- * Uses {@link Class#getSimpleName()} to convert from {@link Class} to {@link String}.
- */
- private static List<String> toString(List<Class<?>> classes) {
- List<String> list = new ArrayList<>();
-
- for (Class<?> aClass : classes) {
- list.add(aClass.getSimpleName());
- }
-
- return list;
- }
-
- }
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