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/* TimeType.java --

   Copyright (C) 2006  Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

GNU Classpath is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

You should have received a copy of the GNU General Public License

along with GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

package gnu.xml.validation.datatype;

import java.util.TimeZone;

import javax.xml.XMLConstants;

import javax.xml.namespace.QName;

import org.relaxng.datatype.DatatypeException;

import org.relaxng.datatype.ValidationContext;

/**

 * The XML Schema time type.

 *

 * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>

 */

final class TimeType

  extends AtomicSimpleType

{

  static class Time

    implements Comparable

  {

    int minutes;

    float seconds;

    public int hashCode()

    {

      return minutes * 31 + new Float(seconds).hashCode();

    }

    public boolean equals(Object other)

    {

      if (other instanceof Time)

        {

          Time time = (Time) other;

          return time.minutes == minutes && time.seconds == seconds;

        }

      return false;

    }

    public int compareTo(Object other)

    {

      if (other instanceof Time)

        {

          Time time = (Time) other;

          if (time.minutes != minutes)

            return minutes - time.minutes;

          if (time.seconds == seconds)

            return 0;

          return (seconds < time.seconds) ? -1 : 1;

        }

      return 0;

    }

  }

  static final int[] CONSTRAINING_FACETS = {

    Facet.PATTERN,

    Facet.ENUMERATION,

    Facet.WHITESPACE,

    Facet.MAX_INCLUSIVE,

    Facet.MAX_EXCLUSIVE,

    Facet.MIN_INCLUSIVE,

    Facet.MIN_EXCLUSIVE

  };

  TimeType()

  {

    super(new QName(XMLConstants.W3C_XML_SCHEMA_NS_URI, "time"),

          TypeLibrary.ANY_SIMPLE_TYPE);

  }

  public int[] getConstrainingFacets()

  {

    return CONSTRAINING_FACETS;

  }

  public void checkValid(String value, ValidationContext context)

    throws DatatypeException

  {

    super.checkValid(value, context);

    int len = value.length();

    int state = 3;

    int start = 0;

    for (int i = 0; i < len; i++)

      {

        char c = value.charAt(i);

        if (c == '-' && state == 0)

          {

            start++;

            continue;

          }

        if (c >= 0x30 && c <= 0x39)

          continue;

        switch (state)

          {

          case 3: // hour

            if (c == ':')

              {

                if (i - start != 2)

                  throw new DatatypeException(i, "invalid time value");

                state = 4;

                start = i + 1;

                continue;

              }

            break;

          case 4: // minute

            if (c == ':')

              {

                if (i - start != 2)

                  throw new DatatypeException(i, "invalid time value");

                state = 5;

                start = i + 1;

                continue;

              }

            break;

          case 5: // second

            if (c == '.')

              {

                if (i - start != 2)

                  throw new DatatypeException(i, "invalid time value");

                state = 6;

                start = i + 1;

                continue;

              }

            else if (c == ' ')

              {

                if (i - start != 2)

                  throw new DatatypeException(i, "invalid time value");

                state = 7;

                start = i + 1;

                continue;

              }

            break;

          case 6: // second fraction

            if (c == ' ')

              {

                state = 7;

                start = i + 1;

                continue;

              }

            break;

          case 7: // timezone 1

            if (start == i)

              {

                if (c == '+' || c == '-')

                  continue;

                else if (c == 'Z')

                  {

                    state = 9;

                    start = i + 1;

                    continue;

                  }

              }

            if (c == ':')

              {

                if (i - start != 2)

                  throw new DatatypeException(i, "invalid time value");

                state = 8;

                start = i + 1;

                continue;

              }

            break;

          }

        throw new DatatypeException(i, "invalid time value");

      }

    switch (state)

      {

      case 5: // second

        if (len - start != 2)

          throw new DatatypeException(len, "invalid time value");

        break;

      case 6: // second fraction

        break;

      case 8: // timezone 2

        if (len - start != 2)

          throw new DatatypeException(len, "invalid time value");

        break;

      case 9: // post Z

        break;

      default:

        throw new DatatypeException(len, "invalid time value");

      }

  }

  public Object createValue(String value, ValidationContext context) {

    int len = value.length();

    int state = 3;

    int start = 0;

    Time time = new Time();

    try

      {

        for (int i = 0; i < len; i++)

          {

            char c = value.charAt(i);

            if (c >= 0x30 && c <= 0x39)

              continue;

            switch (state)

              {

              case 3: // hour

                if (c == ':')

                  {

                    time.minutes =

                      Integer.parseInt(value.substring(start, i)) * 60;

                    state = 4;

                    start = i + 1;

                    continue;

                  }

                break;

              case 4: // minute

                if (c == ':')

                  {

                    time.minutes +=

                      Integer.parseInt(value.substring(start, i));

                    state = 5;

                    start = i + 1;

                    continue;

                  }

                break;

              case 5: // second

                if (c == ' ')

                  {

                    time.seconds =

                      Float.parseFloat(value.substring(start, i));

                    state = 7;

                    start = i + 1;

                    continue;

                  }

                break;

              }

          }

        // end of input

        if (len - start > 0 && state == 7)

          {

            // Timezone

            String timezone = value.substring(len - start);

            int i = timezone.indexOf(':');

            if (i == -1)

              {

                if ("Z".equals(timezone))

                  timezone = "UTC";

                TimeZone tz = TimeZone.getTimeZone(timezone);

                if (tz == null)

                  return null;

                time.minutes += tz.getRawOffset();

              }

            else

              {

                String tzh = timezone.substring(0, i);

                String tzm = timezone.substring(i + 1);

                int offset = Integer.parseInt(tzh) * 60;

                if (offset < 0)

                  offset -= Integer.parseInt(tzm);

                else

                  offset += Integer.parseInt(tzm);

                time.minutes += offset;

              }

          }

        return time;

      }

    catch (NumberFormatException e)

      {

        return null;

      }

  }

}