content: /*
   * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
   *
   * 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.otter.node.etl.common.db.utils;
  
  import java.sql.Timestamp;
  import java.text.ParseException;
  import java.text.ParsePosition;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  import java.util.Locale;
  
  import org.apache.commons.beanutils.ConversionException;
  import org.apache.commons.beanutils.Converter;
  import org.apache.commons.lang.time.DateFormatUtils;
  
  public class SqlTimestampConverter implements Converter {
  
      /** Field description */
      public static final String[]  DATE_FORMATS  = new String[] { "yyyy-MM-dd", "HH:mm:ss", "yyyy-MM-dd HH:mm:ss",
              "yyyy-MM-dd hh:mm:ss.fffffffff", "EEE MMM dd HH:mm:ss zzz yyyy",
              DateFormatUtils.ISO_DATETIME_FORMAT.getPattern(),
              DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT.getPattern(),
              DateFormatUtils.SMTP_DATETIME_FORMAT.getPattern(), };
  
      public static final Converter SQL_TIMESTAMP = new SqlTimestampConverter(null);
  
      /**
       * The default value specified to our Constructor, if any.
       */
      private final Object          defaultValue;
  
      /**
       * Should we return the default value on conversion errors?
       */
      private final boolean         useDefault;
  
      /**
       * Create a {@link Converter} that will throw a {@link ConversionException} if a conversion error occurs.
       */
      public SqlTimestampConverter(){
          this.defaultValue = null;
          this.useDefault = false;
      }
  
      /**
       * Create a {@link Converter} that will return the specified default value if a conversion error occurs.
       * 
       * @param defaultValue The default value to be returned
       */
      public SqlTimestampConverter(Object defaultValue){
          this.defaultValue = defaultValue;
          this.useDefault = true;
      }
  
      /**
       * Convert the specified input object into an output object of the specified type.
       * 
       * @param type Data type to which this value should be converted
       * @param value The input value to be converted
       * @exception ConversionException if conversion cannot be performed successfully
       */
      public Object convert(Class type, Object value) {
          if (value == null) {
              if (useDefault) {
                  return (defaultValue);
              } else {
                  throw new ConversionException("No value specified");
              }
          }
  
          if (value instanceof java.sql.Date && java.sql.Date.class.equals(type)) {
              return value;
          } else if (value instanceof java.sql.Time && java.sql.Time.class.equals(type)) {
              return value;
          } else if (value instanceof java.sql.Timestamp && java.sql.Timestamp.class.equals(type)) {
              return value;
          } else {
              try {
                  if (java.sql.Date.class.equals(type)) {
                      return new java.sql.Date(convertTimestamp2TimeMillis(value.toString()));
                  } else if (java.sql.Time.class.equals(type)) {
                      return new java.sql.Time(convertTimestamp2TimeMillis(value.toString()));
                  } else if (java.sql.Timestamp.class.equals(type)) {
                      return new java.sql.Timestamp(convertTimestamp2TimeMillis(value.toString()));
                  } else {
                      return new Timestamp(convertTimestamp2TimeMillis(value.toString()));
                  }
              } catch (Exception e) {
                  throw new ConversionException("Value format invalid: " + e.getMessage(), e);
              }
          }
  
      }
  
      private Long convertTimestamp2TimeMillis(String input) {
          if (input == null) {
              return null;
          }
  
          try {
              // 先处理Timestamp类型
              return java.sql.Timestamp.valueOf(input).getTime();
          } catch (Exception nfe) {
              try {
                  try {
                      return parseDate(input, DATE_FORMATS, Locale.ENGLISH).getTime();
                  } catch (Exception err) {
                      return parseDate(input, DATE_FORMATS, Locale.getDefault()).getTime();
                  }
              } catch (Exception err) {
                  // 最后处理long time的情况
                  return Long.parseLong(input);
              }
          }
      }
  
      private Date parseDate(String str, String[] parsePatterns, Locale locale) throws ParseException {
          if ((str == null) || (parsePatterns == null)) {
              throw new IllegalArgumentException("Date and Patterns must not be null");
          }
  
          SimpleDateFormat parser = null;
          ParsePosition pos = new ParsePosition(0);
  
          for (int i = 0; i < parsePatterns.length; i++) {
              if (i == 0) {
                  parser = new SimpleDateFormat(parsePatterns[0], locale);
              } else {
                  parser.applyPattern(parsePatterns[i]);
              }
              pos.setIndex(0);
              Date date = parser.parse(str, pos);
              if ((date != null) && (pos.getIndex() == str.length())) {
                  return date;
              }
          }
  
          throw new ParseException("Unable to parse the date: " + str, -1);
      }
  }
  