Application: gvSIG desktop

package org.gvsig.timesupport.impl.coercion;

import java.text.DateFormat;

import java.text.ParseException;

import java.util.Date;

import org.apache.commons.lang3.math.NumberUtils;

import org.gvsig.timesupport.RelativeInstant;

import org.gvsig.timesupport.TimeSupportLocator;

import org.gvsig.timesupport.TimeSupportManager;

import org.gvsig.tools.dataTypes.AbstractCoercion;

import org.gvsig.tools.dataTypes.CoercionException;

import org.gvsig.tools.dataTypes.DataTypeUtils;

import org.gvsig.tools.dataTypes.CoercionContext;

import org.gvsig.tools.dataTypes.CoercionContextLocale;

/**

 *

 * @author jjdelcerro

 */

public class CoerceToInstant extends AbstractCoercion {

  public CoerceToInstant() {

  }

  @Override

  public Object coerce(Object value, CoercionContext context) throws CoercionException {

    if (value == null || value instanceof RelativeInstant) {

      return value;

    }

    TimeSupportManager manager = TimeSupportLocator.getManager();

    if (value instanceof Date) {

      RelativeInstant instant = manager.createRelativeInstant((Date) value);

      return instant;

    }

    if (value instanceof Number) {

      RelativeInstant instant = manager.createRelativeInstant(((Number) value).longValue());

      return instant;

    }

    if (value instanceof String) {

      long milis_l = NumberUtils.toLong((String) value, Long.MIN_VALUE);

      if (milis_l != Long.MIN_VALUE) {

        RelativeInstant instant = manager.createRelativeInstant(milis_l);

        return instant;

      }

      double milis_d = NumberUtils.toDouble((String) value, Double.NaN);

      if (milis_d != Double.NaN) {

        RelativeInstant instant = manager.createRelativeInstant((long) milis_d);

        return instant;

      }

      CoercionContextLocale theContext;

      if (context instanceof CoercionContextLocale) {

        theContext = (CoercionContextLocale) context;

      } else {

        theContext = DataTypeUtils.coerceContextDefaultLocale();

      }

      DateFormat df = DateFormat.getDateTimeInstance(

              DateFormat.DEFAULT,

              DateFormat.DEFAULT,

              theContext.locale()

      );

      try {

        Date date = df.parse((String) value);

        RelativeInstant instant = manager.createRelativeInstant(date);

        return instant;

      } catch (ParseException ex) {

      }

    }

    throw new CoercionException("Can't coerce (" + value.getClass().getSimpleName() + ") '" + value.toString() + "' to Instant.");

  }

}