StateHelper.java

/**
 * Copyright (c) 2010-2016 by the respective copyright holders.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package org.openhab.persistence.jpa.internal;

import java.util.Locale;

import org.openhab.core.library.types.DateTimeType;
import org.openhab.core.library.types.DecimalType;
import org.openhab.core.library.types.PointType;
import org.openhab.core.types.State;

/**
 * Helper class for dealing with State
 * 
 * @author mbergmann
 *
 */
public class StateHelper {

    /**
     * Converts the given State to a string that can be persisted in db
     * 
     * @param state the state of the item to be persisted
     * @return state converted as string
     * @throws Exception
     */
    static public String toString(State state) throws Exception {
        if (state instanceof DateTimeType) {
            return String.valueOf(((DateTimeType) state).getCalendar().getTime().getTime());
        }
        if (state instanceof DecimalType) {
            return String.valueOf(((DecimalType) state).doubleValue());
        }
        if (state instanceof PointType) {
            PointType pType = (PointType) state;
            return String.format(Locale.ENGLISH, "%f;%f;%f", pType.getLatitude().doubleValue(),
                    pType.getLongitude().doubleValue(), pType.getAltitude().doubleValue());
        }

        return state.toString();
    }
}