FloatType.java :  » UnTagged » preflect » com » ryanm » preflect » imp » Android Open Source

package com.ryanm.preflect.imp;

import android.content.Context;
import android.preference.EditTextPreference;
import android.preference.Preference;
import android.text.method.DigitsKeyListener;

import com.ryanm.preflect.ParseException;
import com.ryanm.preflect.VariableType;

/**
 * @author ryanm
 */
public class FloatType extends VariableType<Number>
{
  /***/
  public FloatType()
  {
    super( float.class );
  }

  @Override
  public String encode( Number value )
  {
    return value.toString();
  }

  @Override
  public Number decode( String encoded, Class type ) throws ParseException
  {
    try
    {
      return new Float( encoded );
    }
    catch( NumberFormatException nfe )
    {
      throw new ParseException( nfe );
    }
  }

  @Override
  protected Preference buildPreference( Context context, Class type, String value )
  {
    EditTextPreference pref = new EditTextPreference( context );
    pref.setText( value );
    pref.getEditText().setKeyListener( new DigitsKeyListener( true, true ) );
    pref.getEditText().setSelectAllOnFocus( true );

    return pref;
  }

  @Override
  protected String formatInput( Object input )
  {
    try
    {
      return String.valueOf( Float.parseFloat( ( String ) input ) );
    }
    catch( NumberFormatException nfe )
    { // not very descriptive by default
      throw new NumberFormatException( "Could not parse \"" + input
          + "\" as an decimal" );
    }
  }
}