content: /*
   * Copyright 1999-2101 Alibaba Group.
   *
   * 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.fastjson.serializer;
  
  import java.io.IOException;
  import java.lang.reflect.Type;
  
  /**
   * @author wenshao<szujobs@hotmail.com>
   */
  public class ObjectArraySerializer implements ObjectSerializer {
  
      public static final ObjectArraySerializer instance = new ObjectArraySerializer();
  
      public ObjectArraySerializer(){
      }
  
      public final void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType) throws IOException {
          SerializeWriter out = serializer.getWriter();
  
          Object[] array = (Object[]) object;
          
          if (object == null) {
              if (out.isEnabled(SerializerFeature.WriteNullListAsEmpty)) {
                  out.write("[]");
              } else {
                  out.writeNull();
              }
              return;
          }
          
          int size = array.length;
  
          int end = size - 1;
  
          if (end == -1) {
              out.append("[]");
              return;
          }
  
          SerialContext context = serializer.getContext();
          serializer.setContext(context, object, fieldName);
          
          try {
              Class<?> preClazz = null;
              ObjectSerializer preWriter = null;
              out.append('[');
              
              if (out.isEnabled(SerializerFeature.PrettyFormat)) {
                  serializer.incrementIndent();
                  serializer.println();
                  for (int i = 0; i < size; ++i) {
                      if (i != 0) {
                          out.write(',');
                          serializer.println();
                      }
                      serializer.write(array[i]);
                  }
                  serializer.decrementIdent();
                  serializer.println();
                  out.write(']');
                  return;
              }
              
              for (int i = 0; i < end; ++i) {
                  Object item = array[i];
      
                  if (item == null) {
                      out.append("null,");
                  } else {
                      Class<?> clazz = item.getClass();
      
                      if (clazz == preClazz) {
                          preWriter.write(serializer, item, null, null);
                      } else {
                          preClazz = clazz;
                          preWriter = serializer.getObjectWriter(clazz);
      
                          preWriter.write(serializer, item, null, null);
                      }
      
                      out.append(',');
                  }
              }
      
              Object item = array[end];
      
              if (item == null) {
                  out.append("null]");
              } else {
                  serializer.write(item);
                  out.append(']');
              }
          } finally {
              serializer.setContext(context);
          }
      }
  }
  