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.util.Map;
  
  import org.apache.camel.CamelContext;
  import org.apache.camel.support.LRUCacheFactory;
  
  /**
   * Represents a cache of {@link MethodInfo} objects to avoid the expense of introspection for each invocation of a
   * method via a proxy.
   */
  public class MethodInfoCache {
      private final CamelContext camelContext;
      private final Map<Method, MethodInfo> methodCache;
      private final Map<Class<?>, BeanInfo> classCache;
  
      public MethodInfoCache(CamelContext camelContext) {
          this(camelContext, 1000, 10000);
      }
  
      public MethodInfoCache(CamelContext camelContext, int classCacheSize, int methodCacheSize) {
          this(camelContext, createClassCache(classCacheSize), createMethodCache(methodCacheSize));
      }
  
      public MethodInfoCache(CamelContext camelContext, Map<Class<?>, BeanInfo> classCache, Map<Method, MethodInfo> methodCache) {
          this.camelContext = camelContext;
          this.classCache = classCache;
          this.methodCache = methodCache;
      }
  
      public MethodInfo getMethodInfo(Method method) {
          return methodCache.computeIfAbsent(method, this::createMethodInfo);
      }
  
      protected MethodInfo createMethodInfo(Method method) {
          Class<?> declaringClass = method.getDeclaringClass();
          BeanInfo info = getBeanInfo(declaringClass);
          return info.getMethodInfo(method);
      }
  
      protected BeanInfo getBeanInfo(Class<?> declaringClass) {
          return classCache.computeIfAbsent(declaringClass, this::createBeanInfo);
      }
  
      protected BeanInfo createBeanInfo(Class<?> declaringClass) {
          return new BeanInfo(camelContext, declaringClass);
      }
  
      @SuppressWarnings("unchecked")
      protected static <K, V> Map<K, V> createLruCache(int size) {
          // use a soft cache
          return LRUCacheFactory.newLRUSoftCache(size);
      }
  
      private static Map<Class<?>, BeanInfo> createClassCache(int size) {
          return createLruCache(size);
      }
  
      private static Map<Method, MethodInfo> createMethodCache(int size) {
          return createLruCache(size);
      }
  }
  