content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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 com.alibaba.druid.support.spring.stat;
  
  import java.lang.reflect.Method;
  
  public class SpringMethodInfo {
      private String signature;
  
      private Class<?> instanceClass;
      private Method method;
  
      public SpringMethodInfo(Class<?> instanceClass, Method method) {
          this.instanceClass = instanceClass;
          this.method = method;
      }
  
      public String getClassName() {
          return instanceClass.getName();
      }
  
      public String getMethodName() {
          return method.getName();
      }
  
      @Override
      public int hashCode() {
          final int prime = 31;
          int result = 1;
          result = prime * result + instanceClass.getName().hashCode();
          result = prime * result + method.getName().hashCode();
          return result;
      }
  
      @Override
      public boolean equals(Object obj) {
          if (this == obj) {
              return true;
          }
  
          if (obj == null || !(obj instanceof SpringMethodInfo)) {
              return false;
          }
  
          SpringMethodInfo other = (SpringMethodInfo) obj;
  
          if (!instanceClass.getName().equals(other.instanceClass.getName())) {
              return false;
          }
  
          if (!method.getName().equals(other.method.getName())) {
              return false;
          }
  
          if (method.getParameterTypes().length != other.method.getParameterTypes().length) {
              return false;
          }
  
          for (int i = 0; i < method.getParameterTypes().length; ++i) {
              if (!method.getParameterTypes()[i].getName().equals(other.method.getParameterTypes()[i].getName())) {
                  return false;
              }
          }
  
          return true;
      }
  
      public static String getMethodSignature(Method method) {
          StringBuilder sb = new StringBuilder();
  
          sb.append(method.getName());
          sb.append('(');
          Class<?>[] params = method.getParameterTypes();
          for (int j = 0; j < params.length; j++) {
              sb.append(params[j].getName());
              if (j < (params.length - 1)) {
                  sb.append(',');
              }
          }
          sb.append(')');
  
          return sb.toString();
      }
  
      public String getSignature() {
          if (signature == null) {
              signature = getMethodSignature(method);
          }
          return signature;
      }
  }
  