cn.lead2success.ddlutils.io.converters.TimeConverter Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of ddlutils Show documentation
Fork of Apache DdlUtils project without ant support.
There is a newer version: 1.0.0_21071202
package cn.lead2success.ddlutils.io.converters;

/*
 * 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.
 */

import java.sql.Time;
import java.sql.Types;
import java.util.Calendar;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;

import cn.lead2success.ddlutils.DdlUtilsException;

/**
 * Converts between {@link java.sql.Time} and {@link java.lang.String} using the standard
 * representation "hh:mm:ss".
 * 
 * @version $Revision: 289996 $
 */
public class TimeConverter implements SqlTypeConverter 
{
    /** The regular expression pattern for the parsing of ISO times. */
    private Pattern _timePattern;
	/** The calendar object to convert to/from times. */
	private Calendar _calendar;

	/**
	 * Creates a new time converter object.
	 */
	public TimeConverter()
	{
        try
        {
            _timePattern = Pattern.compile("(?:\\d{4}\\-\\d{2}\\-\\d{2}\\s)?(\\d{2})(?::(\\d{2}))?(?::(\\d{2}))?(?:\\..*)?");
        }
        catch (PatternSyntaxException ex)
        {
            throw new DdlUtilsException(ex);
        }

        _calendar = Calendar.getInstance();
		_calendar.setLenient(false);
	}

	/**
     * {@inheritDoc}
     */
    public Object convertFromString(String textRep, int sqlTypeCode) throws ConversionException
    {
        if (sqlTypeCode != Types.TIME)
        {
            return textRep;
        }
        else if (textRep != null) 
        {
            // we're not using {@link java.sql.Time#valueOf(String)} as this method is too strict
            // it only parses the full spec "hh:mm:ss"
            Matcher matcher = _timePattern.matcher(textRep);
            int     hours   = 0;
            int     minutes = 0;
            int     seconds = 0;

            if (matcher.matches())
            {
                int numGroups = matcher.groupCount();

                try
                {
                    hours = Integer.parseInt(matcher.group(1));
                    if ((numGroups >= 2) && (matcher.group(2) != null))
                    {
                        minutes = Integer.parseInt(matcher.group(2));
                    }
                    if ((numGroups >= 3) && (matcher.group(3) != null))
                    {
                        seconds = Integer.parseInt(matcher.group(3));
                    }
                }
                catch (NumberFormatException ex)
                {
                    throw new ConversionException("Not a valid time : " + textRep, ex);
                }
                _calendar.clear();
                try
                {
                    _calendar.set(Calendar.HOUR_OF_DAY, hours);
                    _calendar.set(Calendar.MINUTE, minutes);
                    _calendar.set(Calendar.SECOND, seconds);
                    return new Time(_calendar.getTimeInMillis());
                }
                catch (IllegalArgumentException ex)
                {
                    throw new ConversionException("Not a valid time : " + textRep, ex);
                }
            }
            else
            {
                throw new ConversionException("Not a valid time : " + textRep);
            }
        }
        else
        {
            return null;
        }
    }

    /**
     * {@inheritDoc}
     */
    public String convertToString(Object obj, int sqlTypeCode) throws ConversionException
    {
        String result = null;

        if (obj != null)
        {
            if (!(obj instanceof Time))
            {
                throw new ConversionException("Expected object of type java.sql.Time, but instead received " + obj.getClass().getName());
            }
            result = obj.toString();
        }
        return result;
    }
}