/*
    *  Licensed to the Apache Software Foundation (ASF) under one
    *  or more contributor license agreements.  See the NOTICE file
    *  distributed with this work for additional information
    *  regarding copyright ownership.  The ASF licenses this file
    *  to you 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 org.apache.mina.integration.beans;
  
  import java.beans.PropertyEditor;
  import java.text.DateFormat;
  import java.text.ParseException;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  import java.util.Locale;
  import java.util.regex.Pattern;
  
  /**
   * A {@link PropertyEditor} which converts a {@link String} into
   * a {@link Date} and vice versa.
   *
   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
   */
  public class DateEditor extends AbstractPropertyEditor {
      private static final Pattern MILLIS = Pattern.compile("[0-9][0-9]*");
  
      private final DateFormat[] formats = new DateFormat[] {
              new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy", Locale.ENGLISH),
              new SimpleDateFormat("yyyy-MM-dd HH:mm:ss Z", Locale.ENGLISH),
              new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.ENGLISH),
              new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH), new SimpleDateFormat("yyyy-MM", Locale.ENGLISH),
              new SimpleDateFormat("yyyy", Locale.ENGLISH), };
  
      /**
       * Creates a new DateEditor instance
       */
      public DateEditor() {
          for (DateFormat f : formats) {
              f.setLenient(true);
          }
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      protected String toText(Object value) {
          if (value instanceof Number) {
              long time = ((Number) value).longValue();
              
              if (time <= 0) {
                  return null;
              }
              
              value = new Date(time);
          }
          
          return formats[0].format((Date) value);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      protected Object toValue(String text) {
          if (MILLIS.matcher(text).matches()) {
              long time = Long.parseLong(text);
              
              if (time <= 0) {
                  return null;
              }
              
              return new Date(time);
          }
  
          for (DateFormat f : formats) {
              try {
                  return f.parse(text);
              } catch (ParseException e) {
                  throw new IllegalArgumentException("Wrong date: " + text);
              }
          }
  
          throw new IllegalArgumentException("Wrong date: " + text);
      }
  }