it.tidalwave.metadata.text.ShutterFormat Maven / Gradle / Ivy

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/***********************************************************************************************************************
 *
 * blueMarine Metadata - open source media workflow
 * Copyright (C) 2007-2011 by Tidalwave s.a.s. (http://www.tidalwave.it)
 *
 ***********************************************************************************************************************
 *
 * 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.
 *
 ***********************************************************************************************************************
 *
 * WWW: http://bluemarine.tidalwave.it
 * SCM: https://kenai.com/hg/bluemarine~metadata-src
 *
 **********************************************************************************************************************/
package it.tidalwave.metadata.text;

import java.text.DecimalFormat;
import java.text.FieldPosition;
import java.text.ParseException;
import javax.annotation.CheckForNull;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;

/*******************************************************************************
 *
 * @author  Fabrizio Giudici
 * @version $Id$
 *
 ******************************************************************************/
public class ShutterFormat extends DecimalFormat
  {
    private static final long serialVersionUID = 674556562345876458L;

    @Override
    @Nonnull
    public StringBuffer format (@Nonnegative double d,
                                @Nonnull final StringBuffer toAppendTo,
                                @Nonnull final FieldPosition pos)
      {
        String s;

        if (d < 0)
          { 
            s = "";
          }

        else if (d >= 1)
          {
            s = Double.toString(d).replaceAll("\\.0$", "");
          }
        
//        else if (d > 0.5)
//          {
//            int numerator = 0;
//            
//            for (int denominator = 10; ; denominator *= 10)
//              {
//                double n = d * denominator;
//                numerator = (int)n;
//                
//                if (numerator == n)
//                  {
//                    s = Long.toString(numerator) + "/" + Long.toString(denominator);
//                    break;  
//                  }
//              }  
//          }

        else
          {
            final double x = 100;
            final double d2 = Math.round(x / d) / x;
            s = "1/" + Double.toString(d2).replaceAll("\\.0$", "");
          }

        toAppendTo.append(s + " sec");

        return toAppendTo;
      }

    @Override
    @Nonnull
    public Number parse (@CheckForNull String s)
      throws ParseException
      {
        if (s != null)
          {
            s = s.replaceAll(" sec$", "").trim();
          }
        
        if ((s == null) || s.equals(""))
          {
            return Double.valueOf(-1); // FIXME
          }

        if (s.startsWith("1/"))
          {
            return Double.valueOf(1 / Double.parseDouble(s.substring(2)));
          }

        else
          {
            return Double.valueOf(s);
          }
      }
  }