WithingsGenericBindingProvider.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.withings.internal;

import org.openhab.binding.withings.WithingsBindingConfig;
import org.openhab.binding.withings.WithingsBindingProvider;
import org.openhab.binding.withings.internal.model.MeasureType;
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;

/**
 * {@link WithingsGenericBindingProvider} is responsible for parsing the binding
 * configuration.
 *
 * @author Dennis Nobel
 * @since 1.5.0
 */
public class WithingsGenericBindingProvider extends AbstractGenericBindingProvider implements WithingsBindingProvider {

    @Override
    public String getBindingType() {
        return "withings";
    }

    @Override
    public WithingsBindingConfig getItemConfig(String itemName) {
        return (WithingsBindingConfig) bindingConfigs.get(itemName);
    }

    @Override
    public void processBindingConfiguration(String context, Item item, String bindingConfig)
            throws BindingConfigParseException {
        super.processBindingConfiguration(context, item, bindingConfig);

        String[] configElements = bindingConfig.split(":");

        String accountId = null;
        MeasureType measureType = null;

        if (configElements.length == 1) {
            measureType = MeasureType.valueOf(configElements[0].toUpperCase());
        } else if (configElements.length == 2) {
            accountId = configElements[0];
            measureType = MeasureType.valueOf(configElements[1].toUpperCase());
        } else {
            throw new BindingConfigParseException("Unknown Binding configuration '{}'. The Binding "
                    + "configuration should consists of either one or two elements.");
        }

        if (measureType == null) {
            throw new BindingConfigParseException(
                    "Could not convert string '" + bindingConfig + "' to according measure type.");
        }

        WithingsBindingConfig config = new WithingsBindingConfig(accountId, measureType);

        addBindingConfig(item, config);
    }

    @Override
    public void validateItemType(Item item, String bindingConfig) throws BindingConfigParseException {
        if (!(item instanceof NumberItem)) {
            throw new BindingConfigParseException(getConfigParseExcpetionMessage(item));
        }
    }

    private String getConfigParseExcpetionMessage(Item item) {
        return "item '" + item.getName() + "' is of type '" + item.getClass().getSimpleName()
                + "', only NumberItems are allowed - please check your *.items configuration";
    }

}