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;
  import java.text.DateFormat;
  import java.util.Calendar;
  import java.util.Date;
  
  import com.alibaba.fastjson.util.IOUtils;
  
  /**
   * @author wenshao<szujobs@hotmail.com>
   */
  public class DateSerializer implements ObjectSerializer {
  
      public final static DateSerializer instance = new DateSerializer();
  
      public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType) throws IOException {
          SerializeWriter out = serializer.getWriter();
  
          if (object == null) {
              out.writeNull();
              return;
          }
  
          if (out.isEnabled(SerializerFeature.WriteClassName)) {
              if (object.getClass() != fieldType) {
                  if (object.getClass() == java.util.Date.class) {
                      out.write("new Date(");
                      out.writeLongAndChar(((Date) object).getTime(), ')');
                  } else {
                      out.write('{');
                      out.writeFieldName("@type");
                      serializer.write(object.getClass().getName());
                      out.writeFieldValue(',', "val", ((Date) object).getTime());
                      out.write('}');
                  }
                  return;
              }
          }
          
          Date date = (Date) object;
          
          if (out.isEnabled(SerializerFeature.WriteDateUseDateFormat)) {
              DateFormat format = serializer.getDateFormat();
              String text = format.format(date);
              out.writeString(text);
              return;
          }
  
          long time = date.getTime();
          if (serializer.isEnabled(SerializerFeature.UseISO8601DateFormat)) {
              if (serializer.isEnabled(SerializerFeature.UseSingleQuotes)) {
                  out.append('\'');
              } else {
                  out.append('\"');
              }
  
              Calendar calendar = Calendar.getInstance();
              calendar.setTimeInMillis(time);
  
              int year = calendar.get(Calendar.YEAR);
              int month = calendar.get(Calendar.MONTH) + 1;
              int day = calendar.get(Calendar.DAY_OF_MONTH);
              int hour = calendar.get(Calendar.HOUR_OF_DAY);
              int minute = calendar.get(Calendar.MINUTE);
              int second = calendar.get(Calendar.SECOND);
              int millis = calendar.get(Calendar.MILLISECOND);
  
              char[] buf;
              if (millis != 0) {
                  buf = "0000-00-00T00:00:00.000".toCharArray();
                  IOUtils.getChars(millis, 23, buf);
                  IOUtils.getChars(second, 19, buf);
                  IOUtils.getChars(minute, 16, buf);
                  IOUtils.getChars(hour, 13, buf);
                  IOUtils.getChars(day, 10, buf);
                  IOUtils.getChars(month, 7, buf);
                  IOUtils.getChars(year, 4, buf);
  
              } else {
                  if (second == 0 && minute == 0 && hour == 0) {
                      buf = "0000-00-00".toCharArray();
                      IOUtils.getChars(day, 10, buf);
                      IOUtils.getChars(month, 7, buf);
                      IOUtils.getChars(year, 4, buf);
                  } else {
                      buf = "0000-00-00T00:00:00".toCharArray();
                      IOUtils.getChars(second, 19, buf);
                      IOUtils.getChars(minute, 16, buf);
                      IOUtils.getChars(hour, 13, buf);
                      IOUtils.getChars(day, 10, buf);
                      IOUtils.getChars(month, 7, buf);
                      IOUtils.getChars(year, 4, buf);
                  }
              }
  
              out.write(buf);
  
              if (serializer.isEnabled(SerializerFeature.UseSingleQuotes)) {
                  out.append('\'');
              } else {
                  out.append('\"');
              }
          } else {
              out.writeLong(time);
          }
      }
  }
  