EMGenericBindingProvider.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.em.internal;

import org.openhab.binding.em.EMBindingProvider;
import org.openhab.binding.em.internal.EMBindingConfig.Datapoint;
import org.openhab.binding.em.internal.EMBindingConfig.EMType;
import org.openhab.core.binding.BindingConfig;
import org.openhab.core.items.Item;
import org.openhab.core.library.items.NumberItem;
import org.openhab.model.item.binding.AbstractGenericBindingProvider;
import org.openhab.model.item.binding.BindingConfigParseException;

/**
 * This class is responsible for parsing the binding configuration.
 *
 * @author Till Klocke
 * @since 1.4.0
 */
public class EMGenericBindingProvider extends AbstractGenericBindingProvider implements EMBindingProvider {

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

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

    /**
     * Binding config in the style {em=
     * "type=01|02|03;address=AA;datapoint=CUMULATED_VALUE;correctionFactor=NN"}
     * {@inheritDoc}
     */
    @Override
    public void processBindingConfiguration(String context, Item item, String bindingConfig)
            throws BindingConfigParseException {
        super.processBindingConfiguration(context, item, bindingConfig);
        String[] parts = bindingConfig.split(";");
        String address = null;
        EMType type = null;
        Datapoint datapoint = null;
        double correctionFactor = 0;
        for (String part : parts) {
            String[] keyValue = part.split("=");
            if ("type".equals(keyValue[0])) {
                type = EMType.getFromTypeValue(keyValue[1]);
            } else if ("address".equals(keyValue[0])) {
                address = keyValue[1];
            } else if ("datapoint".equals(keyValue[0])) {
                datapoint = Datapoint.valueOf(keyValue[1]);
            } else if ("correctionFactor".equals(keyValue[0])) {
                correctionFactor = Double.parseDouble(keyValue[1]);
            }
        }
        EMBindingConfig config = new EMBindingConfig(type, address, datapoint, item, correctionFactor);

        addBindingConfig(item, config);
    }

    @Override
    public EMBindingConfig getConfigByTypeAndAddressAndDatapoint(EMType type, String address, Datapoint datapoint) {
        for (BindingConfig config : super.bindingConfigs.values()) {
            EMBindingConfig emConfig = (EMBindingConfig) config;
            if (emConfig.getAddress().equals(address) && emConfig.getType() == type
                    && emConfig.getDatapoint() == datapoint) {
                return emConfig;
            }
        }
        return null;
    }

}