Iec6205621MeterGenericBindingProvider.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.iec6205621meter.internal;

import java.util.StringTokenizer;

import org.openhab.binding.iec6205621meter.Iec6205621MeterBindingProvider;
import org.openhab.core.binding.BindingConfig;
import org.openhab.core.items.Item;
import org.openhab.core.library.items.NumberItem;
import org.openhab.core.library.items.StringItem;
import org.openhab.model.item.binding.AbstractGenericBindingProvider;
import org.openhab.model.item.binding.BindingConfigParseException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * <p>
 * This class is responsible for parsing the binding configuration.
 *
 * <p>
 * Here are some examples for valid binding configuration strings:
 *
 * <ul>
 * <li><code>{ iec6205621meter="meter1;1.8.1" }</code> - shows the tarif 1 counter value of 'meter1'</li>
 * <li><code>{ iec6205621meter="meter1;1.8.2" }</code> - shows the tarif 1 counter value of 'meter1'</li>
 * <li><code>{ iec6205621meter="meter2;16.7" }</code> - shows the current power usage value of 'meter2'</li>
 * </ul>
 * 
 * @author Peter Kreutzer
 * @author Günter Speckhofer
 * @since 1.5.0
 */
public class Iec6205621MeterGenericBindingProvider extends AbstractGenericBindingProvider
        implements Iec6205621MeterBindingProvider {

    private static final Logger logger = LoggerFactory.getLogger(Iec6205621MeterGenericBindingProvider.class);

    /**
     * {@inheritDoc}
     */
    @Override
    public String getBindingType() {
        return "iec6205621meter";
    }

    /**
     * @{inheritDoc
     */
    @Override
    public void validateItemType(Item item, String bindingConfig) throws BindingConfigParseException {
        if (!(item instanceof NumberItem || item instanceof StringItem)) {
            throw new BindingConfigParseException(
                    "item '" + item.getName() + "' is of type '" + item.getClass().getSimpleName()
                            + "', only Number- and StringItems are allowed - please check your *.items configuration");
        }
        logger.debug(bindingConfig);

    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void processBindingConfiguration(String context, Item item, String bindingConfig)
            throws BindingConfigParseException {
        super.processBindingConfiguration(context, item, bindingConfig);
        Iec6205621MeterBindingConfig config = new Iec6205621MeterBindingConfig();
        StringTokenizer tokenizer = new StringTokenizer(bindingConfig.trim(), ";");
        String[] tokens = new String[tokenizer.countTokens()];
        for (int i = 0; i < tokens.length; i++) {
            tokens[i] = tokenizer.nextToken();
        }
        config.meterName = tokens[0].trim();
        config.obis = tokens[1].trim();
        config.itemType = item.getClass();
        addBindingConfig(item, config);
    }

    @Override
    public String getObis(String itemName) {
        Iec6205621MeterBindingConfig config = (Iec6205621MeterBindingConfig) bindingConfigs.get(itemName);
        return config != null ? config.obis : null;
    }

    @Override
    public String getMeterName(String itemName) {
        Iec6205621MeterBindingConfig config = (Iec6205621MeterBindingConfig) bindingConfigs.get(itemName);
        return config != null ? config.meterName : null;
    }

    /**
     * @{inheritDoc
     */
    @Override
    public Class<? extends Item> getItemType(String itemName) {
        Iec6205621MeterBindingConfig config = (Iec6205621MeterBindingConfig) bindingConfigs.get(itemName);
        return config != null ? config.itemType : null;
    }

    class Iec6205621MeterBindingConfig implements BindingConfig {
        public String obis;
        public String meterName;
        public Class<? extends Item> itemType;
    }
}