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 IntegerSerializer implements ObjectSerializer {
  
      public static IntegerSerializer instance = new IntegerSerializer();
  
      public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType) throws IOException {
          SerializeWriter out = serializer.getWriter();
  
          Number value = (Number) object;
          
          if (value == null) {
              if (out.isEnabled(SerializerFeature.WriteNullNumberAsZero)) {
                  out.write('0');
              } else {
                  out.writeNull();
              }
              return;
          }
          
          out.writeInt(value.intValue());
      }
  }
  