/*
    * 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
    *
    *      https://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.commons.pool2;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  import java.util.Objects;
  
  /**
   * Holds method names, parameters, and return values for tracing method calls.
   */
  public class MethodCall {
      private final String name;
      private final List<Object> params;
      private Object returned;
  
      public MethodCall(final String name) {
          this(name, null);
      }
  
      public MethodCall(final String name, final List<Object> params) {
          if (name == null) {
              throw new IllegalArgumentException("name must not be null.");
          }
          this.name = name;
          if (params != null) {
              this.params = params;
          } else {
              this.params = Collections.emptyList();
          }
      }
  
      public MethodCall(final String name, final Object param) {
          this(name, Collections.singletonList(param));
      }
  
      public MethodCall(final String name, final Object param1, final Object param2) {
          this(name, Arrays.asList(param1, param2));
      }
  
      @Override
      public boolean equals(final Object o) {
          if (this == o) {
              return true;
          }
          if (o == null || getClass() != o.getClass()) {
              return false;
          }
          final MethodCall that = (MethodCall) o;
          if (!Objects.equals(name, that.name) || !Objects.equals(params, that.params)) {
              return false;
          }
          return Objects.equals(returned, that.returned);
      }
  
      public String getName() {
          return name;
      }
  
      public List<Object> getParams() {
          return params;
      }
  
      public Object getReturned() {
          return returned;
      }
  
      @Override
      public int hashCode() {
          int result;
          result = name != null ? name.hashCode() : 0;
          result = 29 * result + (params != null ? params.hashCode() : 0);
          result = 29 * result + (returned != null ? returned.hashCode() : 0);
          return result;
      }
  
      public MethodCall returned(final Object obj) {
          setReturned(obj);
          return this;
      }
  
      public void setReturned(final Object returned) {
          this.returned = returned;
     }
 
     @Override
     public String toString() {
         final StringBuilder sb = new StringBuilder();
         sb.append("MethodCall");
         sb.append("{name='").append(name).append('\'');
         if (!params.isEmpty()) {
             sb.append(", params=").append(params);
         }
         if (returned != null) {
             sb.append(", returned=").append(returned);
         }
         sb.append('}');
         return sb.toString();
     }
 }