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The following commit(s) were added to refs/heads/master by this push: new 965e098 CAMEL-14933: Remove dependencies on spring in GenerateConfigurerMojo 965e098 is described below commit 965e098e2b0b369dec27c3e10aa889eae078888a Author: lburgazzoli <lburgazz...@gmail.com> AuthorDate: Mon Apr 20 14:32:21 2020 +0200 CAMEL-14933: Remove dependencies on spring in GenerateConfigurerMojo --- .../camel/tooling/util/ReflectionHelper.java | 215 +++++++++++++++++++++ tooling/maven/camel-package-maven-plugin/pom.xml | 4 - .../maven/packaging/GenerateConfigurerMojo.java | 5 +- 3 files changed, 218 insertions(+), 6 deletions(-) diff --git a/tooling/camel-tooling-util/src/main/java/org/apache/camel/tooling/util/ReflectionHelper.java b/tooling/camel-tooling-util/src/main/java/org/apache/camel/tooling/util/ReflectionHelper.java new file mode 100644 index 0000000..af0178f --- /dev/null +++ b/tooling/camel-tooling-util/src/main/java/org/apache/camel/tooling/util/ReflectionHelper.java @@ -0,0 +1,215 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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.apache.camel.tooling.util; + +import java.lang.reflect.Field; +import java.lang.reflect.Method; +import java.lang.reflect.Modifier; +import java.util.Arrays; +import java.util.Objects; + +/** + * Helper for working with reflection on classes. + * <p/> + * This code is a copy of org.apache.camel.util.ReflectionHelper to avoid cyclic dependencies between artifacts and + * camel maven plugins. + * This code is based on org.apache.camel.spring.util.ReflectionUtils class. + */ +public final class ReflectionHelper { + + private ReflectionHelper() { + // utility class + } + + /** + * Callback interface invoked on each field in the hierarchy. + */ + @FunctionalInterface + public interface FieldCallback { + + /** + * Perform an operation using the given field. + * + * @param field the field to operate on + */ + void doWith(Field field) throws IllegalArgumentException, IllegalAccessException; + } + + /** + * Action to take on each method. + */ + @FunctionalInterface + public interface MethodCallback { + + /** + * Perform an operation using the given method. + * + * @param method the method to operate on + */ + void doWith(Method method) throws IllegalArgumentException, IllegalAccessException; + } + + /** + * Action to take on each class. + */ + @FunctionalInterface + public interface ClassCallback { + + /** + * Perform an operation using the given class. + * + * @param clazz the class to operate on + */ + void doWith(Class clazz) throws IllegalArgumentException, IllegalAccessException; + } + + /** + * Perform the given callback operation on the nested (inner) classes. + * + * @param clazz class to start looking at + * @param cc the callback to invoke for each inner class (excluding the class itself) + */ + public static void doWithClasses(Class<?> clazz, ClassCallback cc) throws IllegalArgumentException { + // and then nested classes + Class[] classes = clazz.getDeclaredClasses(); + for (Class aClazz : classes) { + try { + cc.doWith(aClazz); + } catch (IllegalAccessException ex) { + throw new IllegalStateException("Shouldn't be illegal to access class '" + aClazz.getName() + "': " + ex); + } + } + } + + /** + * Invoke the given callback on all fields in the target class, going up the + * class hierarchy to get all declared fields. + * @param clazz the target class to analyze + * @param fc the callback to invoke for each field + */ + public static void doWithFields(Class<?> clazz, FieldCallback fc) throws IllegalArgumentException { + // Keep backing up the inheritance hierarchy. + Class<?> targetClass = clazz; + do { + Field[] fields = targetClass.getDeclaredFields(); + for (Field field : fields) { + try { + fc.doWith(field); + } catch (IllegalAccessException ex) { + throw new IllegalStateException("Shouldn't be illegal to access field '" + field.getName() + "': " + ex); + } + } + targetClass = targetClass.getSuperclass(); + } + while (targetClass != null && targetClass != Object.class); + } + + /** + * Perform the given callback operation on all matching methods of the given + * class and superclasses (or given interface and super-interfaces). + * <p/> + * <b>Important:</b> This method does not take the + * {@link java.lang.reflect.Method#isBridge() bridge methods} into account. + * + * @param clazz class to start looking at + * @param mc the callback to invoke for each method + */ + public static void doWithMethods(Class<?> clazz, MethodCallback mc) throws IllegalArgumentException { + // Keep backing up the inheritance hierarchy. + Method[] methods = clazz.getDeclaredMethods(); + for (Method method : methods) { + if (method.isBridge()) { + // skip the bridge methods which in Java 8 leads to problems with inheritance + // see https://bugs.openjdk.java.net/browse/JDK-6695379 + continue; + } + try { + mc.doWith(method); + } catch (IllegalAccessException ex) { + throw new IllegalStateException("Shouldn't be illegal to access method '" + method.getName() + "': " + ex); + } + } + if (clazz.getSuperclass() != null) { + doWithMethods(clazz.getSuperclass(), mc); + } else if (clazz.isInterface()) { + for (Class<?> superIfc : clazz.getInterfaces()) { + doWithMethods(superIfc, mc); + } + } + } + + /** + * Attempt to find a {@link Method} on the supplied class with the supplied name + * and parameter types. Searches all superclasses up to {@code Object}. + * <p>Returns {@code null} if no {@link Method} can be found. + * @param clazz the class to introspect + * @param name the name of the method + * @param paramTypes the parameter types of the method + * (may be {@code null} to indicate any signature) + * @return the Method object, or {@code null} if none found + */ + public static Method findMethod(Class<?> clazz, String name, Class<?>... paramTypes) { + Objects.requireNonNull(clazz, "Class must not be null"); + Objects.requireNonNull(name, "Method name must not be null"); + Class<?> searchType = clazz; + while (searchType != null) { + Method[] methods = searchType.isInterface() ? searchType.getMethods() : searchType.getDeclaredMethods(); + for (Method method : methods) { + if (name.equals(method.getName()) && (paramTypes == null || Arrays.equals(paramTypes, method.getParameterTypes()))) { + return method; + } + } + searchType = searchType.getSuperclass(); + } + return null; + } + + public static void setField(Field f, Object instance, Object value) { + try { + boolean oldAccessible = f.isAccessible(); + boolean shouldSetAccessible = !Modifier.isPublic(f.getModifiers()) && !oldAccessible; + if (shouldSetAccessible) { + f.setAccessible(true); + } + f.set(instance, value); + if (shouldSetAccessible) { + f.setAccessible(oldAccessible); + } + } catch (Exception ex) { + throw new UnsupportedOperationException("Cannot inject value of class: " + value.getClass() + " into: " + f); + } + } + + public static Object getField(Field f, Object instance) { + try { + boolean oldAccessible = f.isAccessible(); + boolean shouldSetAccessible = !Modifier.isPublic(f.getModifiers()) && !oldAccessible; + if (shouldSetAccessible) { + f.setAccessible(true); + } + Object answer = f.get(instance); + if (shouldSetAccessible) { + f.setAccessible(oldAccessible); + } + return answer; + } catch (Exception ex) { + // ignore + } + return null; + } + +} diff --git a/tooling/maven/camel-package-maven-plugin/pom.xml b/tooling/maven/camel-package-maven-plugin/pom.xml index cc96052..4d6a648 100644 --- a/tooling/maven/camel-package-maven-plugin/pom.xml +++ b/tooling/maven/camel-package-maven-plugin/pom.xml @@ -124,10 +124,6 @@ <artifactId>roaster-jdt</artifactId> <version>${roaster-version}</version> </dependency> - <dependency> - <groupId>org.springframework</groupId> - <artifactId>spring-core</artifactId> - </dependency> <!-- jandex for annotation processing --> <dependency> diff --git a/tooling/maven/camel-package-maven-plugin/src/main/java/org/apache/camel/maven/packaging/GenerateConfigurerMojo.java b/tooling/maven/camel-package-maven-plugin/src/main/java/org/apache/camel/maven/packaging/GenerateConfigurerMojo.java index a6d38f3..e1f941f 100644 --- a/tooling/maven/camel-package-maven-plugin/src/main/java/org/apache/camel/maven/packaging/GenerateConfigurerMojo.java +++ b/tooling/maven/camel-package-maven-plugin/src/main/java/org/apache/camel/maven/packaging/GenerateConfigurerMojo.java @@ -44,7 +44,8 @@ import org.jboss.jandex.ClassInfo; import org.jboss.jandex.DotName; import org.jboss.jandex.Index; import org.jboss.jandex.IndexReader; -import org.springframework.util.ReflectionUtils; + +import static org.apache.camel.tooling.util.ReflectionHelper.doWithMethods; /** * Generate configurer classes from @Configuer annotated classes. @@ -169,7 +170,7 @@ public class GenerateConfigurerMojo extends AbstractGeneratorMojo { Class clazz = projectClassLoader.loadClass(fqn); // find all public setters - ReflectionUtils.doWithMethods(clazz, m -> { + doWithMethods(clazz, m -> { boolean setter = m.getName().length() >= 4 && m.getName().startsWith("set") && Character.isUpperCase(m.getName().charAt(3)); setter &= Modifier.isPublic(m.getModifiers()) && m.getParameterCount() == 1; setter &= filterSetter(m);