content: /*
   * 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.component.bean;
  
  import java.lang.reflect.Method;
  import java.lang.reflect.Modifier;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  
  import org.apache.camel.util.ObjectHelper;
  
  /**
   * This class aims at retaining the right methods while parsing a given {@link java.lang.Class}.
   */
  class MethodsFilter {
  
      private final List<Method> methods = new ArrayList<>();
      private final Class<?> inheritingClass;
  
      /**
       * Creates a <code>MethodsFilter</code> for a given {@link java.lang.Class}.
       *
       * @param clazz The {@link java.lang.Class} whose methods are to be filtered.
       */
      public MethodsFilter(Class<?> clazz) {
          this.inheritingClass = clazz;
      }
  
      /**
       * Retains methods, preferring those from public classes in case of overrides.
       *
       * @param proposedMethod The method proposed to the filter.
       */
      void filterMethod(Method proposedMethod) {
          if (proposedMethod.isBridge()) {
              return;
          }
  
          for (int i = 0; i < methods.size(); i++) {
              Method alreadyRegistered = methods.get(i);
  
              if (Modifier.isPublic(proposedMethod.getDeclaringClass().getModifiers())) {
                  boolean overridden = ObjectHelper.isOverridingMethod(inheritingClass, proposedMethod, alreadyRegistered, false);
                  boolean overridding
                          = ObjectHelper.isOverridingMethod(inheritingClass, alreadyRegistered, proposedMethod, false);
  
                  boolean registeredMethodIsPublic = Modifier.isPublic(alreadyRegistered.getDeclaringClass().getModifiers());
  
                  if (overridden && !registeredMethodIsPublic) {
                      // Retain the overridden method from a public class
                      methods.set(i, proposedMethod);
                      return;
                  } else if (overridding) {
                      // Retain the override from a public class
                      methods.set(i, proposedMethod);
                      return;
                  }
              }
          }
  
          methods.add(proposedMethod);
      }
  
      List<Method> asReadOnlyList() {
          return Collections.unmodifiableList(methods);
      }
  }
  