it.tidalwave.metadata.text.ApertureFormat 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 javax.annotation.CheckForNull;
import javax.annotation.Nonnull;

/*******************************************************************************
 *
 * @author  Fabrizio Giudici
 * @version $Id$
 *
 ******************************************************************************/
public class ApertureFormat extends DecimalFormat
  {
    public static enum F
      {
        STANDARD("f"),
        UNICODE("\u0192");

        @Nonnull
        private final String text;
        
        private F (@Nonnull final String text)
          {
            this.text = text;    
          }

        @Nonnull
        public String getText()
          {
            return text;    
          }
      }
    
    private static final long serialVersionUID = 3453452345876458L;

    private F f;

    public ApertureFormat() 
      {
        this(F.STANDARD);
      }

    public ApertureFormat (@Nonnull final F f)
      {
        this.f = f;
      }

    @Nonnull
    public F getF() 
      {
        return f;
      }

    public void setF (@Nonnull final F f)
      {
        this.f = f;
      }
    
    @Override
    @Nonnull
    public StringBuffer format (double number, 
                                @Nonnull final StringBuffer toAppendTo,
                                @Nonnull final FieldPosition pos)
      {
        toAppendTo.append(String.format("%s/%.1f", f.getText(), number).replaceAll(".0$", ""));
        return toAppendTo;
      }

    @Override
    @Nonnull
    public Number parse (@CheckForNull String s)
      {
        if ((s == null) || s.trim().equals(""))
          {
            return Integer.valueOf(-1);
          }

        else
          {
            return Double.valueOf(s.replaceAll(String.format("^%s/", f.getText()), "").trim());
          }
      }
  }