/*
    * 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.commons.pool2.impl;
  
  import java.io.PrintWriter;
  import java.io.StringWriter;
  import java.text.SimpleDateFormat;
  import java.util.Objects;
  
  import org.apache.commons.pool2.PooledObject;
  
  /**
   * Implements providing information on pooled
   * objects via JMX.
   *
   * @since 2.0
   */
  public class DefaultPooledObjectInfo implements DefaultPooledObjectInfoMBean {
  
      private static final String PATTERN = "yyyy-MM-dd HH:mm:ss Z";
  
      private final PooledObject<?> pooledObject;
  
      /**
       * Constructs a new instance for the given pooled object.
       *
       * @param pooledObject The pooled object that this instance will represent
       * @throws NullPointerException if {@code obj} is {@code null}
       */
      public DefaultPooledObjectInfo(final PooledObject<?> pooledObject) {
          this.pooledObject = Objects.requireNonNull(pooledObject, "pooledObject");
      }
  
      @Override
      public long getBorrowedCount() {
          return pooledObject.getBorrowedCount();
      }
  
      @Override
      public long getCreateTime() {
          return pooledObject.getCreateInstant().toEpochMilli();
      }
  
      @Override
      public String getCreateTimeFormatted() {
          return getTimeMillisFormatted(getCreateTime());
      }
  
      @Override
      public long getLastBorrowTime() {
          return pooledObject.getLastBorrowInstant().toEpochMilli();
      }
  
      @Override
      public String getLastBorrowTimeFormatted() {
          return getTimeMillisFormatted(getLastBorrowTime());
      }
  
      @Override
      public String getLastBorrowTrace() {
          final StringWriter sw = new StringWriter();
          pooledObject.printStackTrace(new PrintWriter(sw));
          return sw.toString();
      }
  
      @Override
      public long getLastReturnTime() {
          return pooledObject.getLastReturnInstant().toEpochMilli();
      }
  
      @Override
      public String getLastReturnTimeFormatted() {
          return getTimeMillisFormatted(getLastReturnTime());
      }
  
      @Override
      public String getPooledObjectToString() {
          return Objects.toString(pooledObject.getObject(), null);
      }
  
      @Override
      public String getPooledObjectType() {
          final Object object = pooledObject.getObject();
          return object != null ? object.getClass().getName() : null;
      }
 
     private String getTimeMillisFormatted(final long millis) {
         return new SimpleDateFormat(PATTERN).format(Long.valueOf(millis));
     }
 
     /**
      * @since 2.4.3
      */
     @Override
     public String toString() {
         final StringBuilder builder = new StringBuilder();
         builder.append("DefaultPooledObjectInfo [pooledObject=");
         builder.append(pooledObject);
         builder.append("]");
         return builder.toString();
     }
 }