ModStatusRelays.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.binding.lcn.input;

import java.util.Collection;
import java.util.LinkedList;
import java.util.regex.Matcher;

import org.openhab.binding.lcn.common.LcnAddrMod;
import org.openhab.binding.lcn.common.PckParser;
import org.openhab.binding.lcn.connection.Connection;
import org.openhab.binding.lcn.connection.ModInfo;
import org.openhab.core.events.EventPublisher;
import org.openhab.core.items.Item;
import org.openhab.core.types.Command;

/**
 * Status of 8 relays received from an LCN module.
 *
 * @author Tobias J�ttner
 */
public class ModStatusRelays extends Mod {

    /** 8 relay states. */
    private final boolean[] states;

    /**
     * Constructor.
     * 
     * @param physicalSourceAddr the source address
     * @param states the 8 relay states
     */
    ModStatusRelays(LcnAddrMod physicalSourceAddr, boolean[] states) {
        super(physicalSourceAddr);
        this.states = states;
    }

    /**
     * Gets the state of a single relay.
     * 
     * @param relayId 0..7
     * @return the relay's state
     */
    public boolean getState(int relayId) {
        return this.states[relayId];
    }

    /**
     * Tries to parse the given input received from LCN-PCHK.
     * 
     * @param input the input
     * @return list of {@link ModStatusRelays} (might be empty, but not null}
     */
    static Collection<Input> tryParseInput(String input) {
        LinkedList<Input> ret = new LinkedList<Input>();
        try {
            Matcher matcher = PckParser.PATTERN_STATUS_RELAYS.matcher(input);
            if (matcher.matches()) {
                ret.add(new ModStatusRelays(
                        new LcnAddrMod(Integer.parseInt(matcher.group("segId")),
                                Integer.parseInt(matcher.group("modId"))),
                        PckParser.getBooleanValue(Integer.parseInt(matcher.group("byteValue")))));
            }
        } catch (IllegalArgumentException ex) {
        }
        return ret;
    }

    /**
     * Notifies the connection about the received relays status.
     * {@inheritDoc}
     */
    @Override
    public void process(Connection conn) {
        super.process(conn); // Will replace source segment 0 with the local segment id
        ModInfo info = conn.getModInfo(this.logicalSourceAddr);
        if (info != null) {
            info.requestStatusRelays.onResponseReceived();
        }
    }

    /** {@inheritDoc} */
    @Override
    public boolean tryVisualization(Input.VisualizationVisitor handler, Connection conn, Command cmd, Item item,
            EventPublisher eventPublisher) {
        return handler.visualizationHandleRelaysStatus(this, cmd, item, eventPublisher);
    }

}