/*
    * 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.logging.log4j.message;
  
  import org.apache.logging.log4j.util.PerformanceSensitive;
  import org.apache.logging.log4j.util.StringBuilderFormattable;
  
  /**
   * Mutable Message wrapper around an Object message.
   * @since 2.6
   */
  @PerformanceSensitive("allocation")
  public class ReusableObjectMessage implements ReusableMessage {
      private static final long serialVersionUID = 6922476812535519960L;
  
      private transient Object obj;
      private transient String objectString;
  
      public void set(final Object object) {
          this.obj = object;
      }
  
      /**
       * Returns the formatted object message.
       *
       * @return the formatted object message.
       */
      @Override
      public String getFormattedMessage() {
          return String.valueOf(obj);
      }
  
      @Override
      public void formatTo(final StringBuilder buffer) {
          if (obj == null || obj instanceof String) {
              buffer.append((String) obj);
          } else if (obj instanceof StringBuilderFormattable) {
              ((StringBuilderFormattable) obj).formatTo(buffer);
          } else if (obj instanceof CharSequence) {
              buffer.append((CharSequence) obj);
          } else if (obj instanceof Integer) { // LOG4J2-1437 unbox auto-boxed primitives to avoid calling toString()
              buffer.append(((Integer) obj).intValue());
          } else if (obj instanceof Long) {
              buffer.append(((Long) obj).longValue());
          } else if (obj instanceof Double) {
              buffer.append(((Double) obj).doubleValue());
          } else if (obj instanceof Boolean) {
              buffer.append(((Boolean) obj).booleanValue());
          } else if (obj instanceof Character) {
              buffer.append(((Character) obj).charValue());
          } else if (obj instanceof Short) {
              buffer.append(((Short) obj).shortValue());
          } else if (obj instanceof Float) {
              buffer.append(((Float) obj).floatValue());
          } else {
              buffer.append(obj);
          }
      }
  
      /**
       * Returns the object formatted using its toString method.
       *
       * @return the String representation of the object.
       */
      @Override
      public String getFormat() {
          return getFormattedMessage();
      }
  
      /**
       * Returns the object parameter.
       *
       * @return The object.
       * @since 2.7
       */
      public Object getParameter() {
          return obj;
      }
  
      /**
       * Returns the object as if it were a parameter.
       *
       * @return The object.
       */
      @Override
     public Object[] getParameters() {
         return new Object[] {obj};
     }
 
     @Override
     public String toString() {
         return getFormattedMessage();
     }
 
     /**
      * Gets the message if it is a throwable.
      *
      * @return the message if it is a throwable.
      */
     @Override
     public Throwable getThrowable() {
         return obj instanceof Throwable ? (Throwable) obj : null;
     }
 
     /**
      * This message does not have any parameters, so this method returns the specified array.
      * @param emptyReplacement the parameter array to return
      * @return the specified array
      */
     @Override
     public Object[] swapParameters(final Object[] emptyReplacement) {
         return emptyReplacement;
     }
 
     /**
      * This message does not have any parameters so this method always returns zero.
      * @return 0 (zero)
      */
     @Override
     public short getParameterCount() {
         return 0;
     }
 
     @Override
     public Message memento() {
         return new ObjectMessage(obj);
     }
 }