/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2002-2011, Open Source Geospatial Foundation (OSGeo)
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library 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
 *    Lesser General Public License for more details.
 */
package org.geotools.gml3.bindings;

import java.sql.Timestamp;
import java.util.Calendar;
import java.util.Date;

import javax.xml.namespace.QName;

import org.geotools.gml3.GML;
import org.geotools.temporal.object.DefaultPosition;
import org.geotools.xml.AbstractSimpleBinding;
import org.geotools.xml.InstanceComponent;
import org.geotools.xs.bindings.XSDateBinding;
import org.geotools.xs.bindings.XSDateTimeBinding;
import org.opengis.temporal.Position;

/**
 * Binding object for the type http://www.opengis.net/gml:TimePositionUnion.
 * 
 * <p>
 * 
 * <pre>
 *  <code>
 *  <simpleType name="TimePositionUnion">
 *      <annotation>
 *          <documentation xml:lang="en">The ISO 19108:2002 hierarchy of subtypes for temporal position are collapsed 
 *        by defining a union of XML Schema simple types for indicating temporal position relative 
 *        to a specific reference system. 
 *        
 *        Dates and dateTime may be indicated with varying degrees of precision.  
 *        dateTime by itself does not allow right-truncation, except for fractions of seconds. 
 *        When used with non-Gregorian calendars based on years, months, days, 
 *        the same lexical representation should still be used, with leading zeros added if the 
 *        year value would otherwise have fewer than four digits.  
 *        
 *        An ordinal position may be referenced via URI identifying the definition of an ordinal era.  
 *        
 *        A time coordinate value is indicated as a decimal (e.g. UNIX time, GPS calendar).</documentation>
 *      </annotation>
 *      <union memberTypes="gml:CalDate time dateTime anyURI decimal"/>
 *  </simpleType> 
 * 	
 *   </code>
 * </pre>
 * 
 * </p>
 * 
 * @generated
 */
public class TimePositionUnionBinding extends AbstractSimpleBinding {

    /**
     * @generated
     */
    public QName getTarget() {
        return GML.TimePositionUnion;
    }

    /**
     * <!-- begin-user-doc --> <!-- end-user-doc -->
     * 
     * @generated modifiable
     */
    public Class getType() {
        return Position.class;
    }

    /**
     * <!-- begin-user-doc --> <!-- end-user-doc -->
     * 
     * @generated modifiable
     */
    public Object parse(InstanceComponent instance, Object value) throws Exception {
        //JD: for the moment we will just handle the easy ones of date and datetime
        Date date = null;
        try {
            Timestamp c = new XSDateTimeBinding().parse(instance, value);
            if (c != null) {
                date = new Date(c.getTime());
            }
        }
        catch(Exception e) {}

        if (date == null) {
            try {
                date = (Date) new XSDateBinding().parse(instance, value); 
            }
            catch(Exception e) {
                e.printStackTrace();
            };
        }
        
        if (date == null) {
            throw new IllegalArgumentException("Unable to parse " + value);
        }

        return new DefaultPosition(date);
    }

}