/*
 *  Copyright (C) 2010-2012 Stichting Akvo (Akvo Foundation)
 *
 *  This file is part of Akvo FLOW.
 *
 *  Akvo FLOW is free software: you can redistribute it and modify it under the terms of
 *  the GNU Affero General Public License (AGPL) as published by the Free Software Foundation,
 *  either version 3 of the License or any later version.
 *
 *  Akvo FLOW 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 Affero General Public License included below for more details.
 *
 *  The full license text can also be seen at <http://www.gnu.org/licenses/agpl.html>.
 */

package org.waterforpeople.mapping.app.util;

import org.apache.commons.beanutils.converters.AbstractConverter;

import com.google.appengine.api.datastore.Text;

/**
 * converts from datastore Text objects to strings & vice versa
 * 
 * @author Christopher Fagiani
 */
@SuppressWarnings("rawtypes")
public class DatastoreTextConverter extends AbstractConverter {

    @Override
    protected Object convertToType(Class type, Object value) throws Throwable {
        if (value != null) {
            if (type == String.class) {
                if (value instanceof Text) {
                    return ((Text) value).getValue();
                } else {
                    return value.toString();
                }
            } else if (type == Text.class) {
                if (value instanceof String) {
                    return new Text((String) value);
                } else if (value instanceof Text) {
                    return value;
                } else {
                    return new Text(value.toString());
                }
            }
        }
        return null;
    }

    @Override
    protected String convertToString(Object value) throws Throwable {
        return (String) convertToType(String.class, value);
    }

    @Override
    public Object handleMissing(Class type) {
        return null;
    }

    @Override
    protected Class getDefaultType() {
        return Text.class;
    }

}