content: /*
   * Copyright 1999-2018 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 com.alibaba.fastjson.util.TypeUtils;
  
  import java.io.IOException;
  import java.lang.reflect.Type;
  import java.util.List;
  
  /**
   * @author wenshao[szujobs@hotmail.com]
   */
  public final class ListSerializer implements ObjectSerializer {
  
      public static final ListSerializer instance = new ListSerializer();
  
      public final void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features)
                                                                                                         throws IOException {
  
          boolean writeClassName = serializer.out.isEnabled(SerializerFeature.WriteClassName)
                  || SerializerFeature.isEnabled(features, SerializerFeature.WriteClassName);
  
          SerializeWriter out = serializer.out;
  
          Type elementType = null;
          if (writeClassName) {
              elementType = TypeUtils.getCollectionItemType(fieldType);
          }
  
          if (object == null) {
              out.writeNull(SerializerFeature.WriteNullListAsEmpty);
              return;
          }
  
          List<?> list = (List<?>) object;
  
          if (list.size() == 0) {
              out.append("[]");
              return;
          }
  
          SerialContext context = serializer.context;
          serializer.setContext(context, object, fieldName, 0);
  
          ObjectSerializer itemSerializer = null;
          try {
              if (out.isEnabled(SerializerFeature.PrettyFormat)) {
                  out.append('[');
                  serializer.incrementIndent();
  
                  int i = 0;
                  for (Object item : list) {
                      if (i != 0) {
                          out.append(',');
                      }
  
                      serializer.println();
                      if (item != null) {
                          if (serializer.containsReference(item)) {
                              serializer.writeReference(item);
                          } else {
                              itemSerializer = serializer.getObjectWriter(item.getClass());
                              SerialContext itemContext = new SerialContext(context, object, fieldName, 0, 0);
                              serializer.context = itemContext;
                              itemSerializer.write(serializer, item, i, elementType, features);
                          }
                      } else {
                          serializer.out.writeNull();
                      }
                      i++;
                  }
  
                  serializer.decrementIdent();
                  serializer.println();
                  out.append(']');
                  return;
              }
  
              out.append('[');
              for (int i = 0, size = list.size(); i < size; ++i) {
                  Object item = list.get(i);
                  if (i != 0) {
                      out.append(',');
                  }
                  
                  if (item == null) {
                      out.append("null");
                  } else {
                      Class<?> clazz = item.getClass();
  
                      if (clazz == Integer.class) {
                          out.writeInt(((Integer) item).intValue());
                      } else if (clazz == Long.class) {
                          long val = ((Long) item).longValue();
                          if (writeClassName) {
                              out.writeLong(val);
                              out.write('L');
                          } else {
                              out.writeLong(val);
                          }
                      } else {
                          if ((SerializerFeature.DisableCircularReferenceDetect.mask & features) != 0){
                              itemSerializer = serializer.getObjectWriter(item.getClass());
                              itemSerializer.write(serializer, item, i, elementType, features);
                          }else {
                              if (!out.disableCircularReferenceDetect) {
                                  SerialContext itemContext = new SerialContext(context, object, fieldName, 0, 0);
                                  serializer.context = itemContext;
                              }
  
                              if (serializer.containsReference(item)) {
                                  serializer.writeReference(item);
                              } else {
                                  itemSerializer = serializer.getObjectWriter(item.getClass());
                                  if ((SerializerFeature.WriteClassName.mask & features) != 0
                                          && itemSerializer instanceof JavaBeanSerializer)
                                  {
                                      JavaBeanSerializer javaBeanSerializer = (JavaBeanSerializer) itemSerializer;
                                      javaBeanSerializer.writeNoneASM(serializer, item, i, elementType, features);
                                  } else {
                                      itemSerializer.write(serializer, item, i, elementType, features);
                                  }
                              }
                          }
                      }
                  }
              }
              out.append(']');
          } finally {
              serializer.context = context;
          }
      }
  
  }
  