SysteminfoGenericBindingProvider.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.systeminfo.internal;

import org.openhab.binding.systeminfo.SysteminfoBindingProvider;
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;

/**
 * This class is responsible for parsing the binding configuration.
 *
 * @author Pauli Anttila
 * @since 1.3.0
 */
public class SysteminfoGenericBindingProvider extends AbstractGenericBindingProvider
        implements SysteminfoBindingProvider {

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

    /**
     * @{inheritDoc
     */
    @Override
    public void validateItemType(Item item, String bindingConfig) throws BindingConfigParseException {
        if (item == null) {
            throw new BindingConfigParseException(
                    "item is not permitted to be null.  item must be a non-null NumberItem or StringItem - please check your *.items configuration");
        } else if (!(item instanceof NumberItem || item instanceof StringItem)) {
            throw new BindingConfigParseException("item '" + item.getName() + "' is of type '"
                    + item.getClass().getSimpleName()
                    + "', only NumberItem and StringItem are allowed - please check your *.items configuration");
        }
    }

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

        if (item == null) {
            throw new BindingConfigParseException("item is not permitted to be null");
        } else if (bindingConfig == null) {
            throw new BindingConfigParseException("bindingConfig is not permitted to be null");
        }

        SysteminfoBindingConfig config = new SysteminfoBindingConfig();

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

        if (configParts.length < 2) {
            throw new BindingConfigParseException("Systeminfo binding must contain at least 2 parts separated by ':'");
        }

        String commandType = configParts[0].trim();
        if (configParts.length > 3) {
            try {
                int index1 = bindingConfig.indexOf(":");
                int index2 = bindingConfig.indexOf(":", index1 + 1);
                if (index1 > 0 && index2 > index1 + 1) {
                    config.target = bindingConfig.substring(index2 + 1);
                } else {
                    throw new BindingConfigParseException("Systeminfo binding must contain 2-3 parts separated by ':'");
                }
            } catch (Exception e) {
                throw new BindingConfigParseException("Systeminfo binding must contain 2-3 parts separated by ':'");
            }
        }

        try {
            config.commandType = SysteminfoCommandType.getCommandType(commandType);
        } catch (IllegalArgumentException e) {
            throw new BindingConfigParseException("'" + commandType + "' is not a valid command type");
        }

        try {
            config.refreshInterval = Integer.valueOf(configParts[1]);
        } catch (NumberFormatException e) {
            throw new BindingConfigParseException("'" + configParts[1] + "' is not a valid refresh interval");
        }

        if (config.target == null) {
            if (configParts.length > 2) {
                config.target = configParts[2].trim();
            }
        }

        addBindingConfig(item, config);
    }

    @Override
    public SysteminfoCommandType getCommandType(String itemName) {
        if (itemName == null) {
            return null;
        }

        SysteminfoBindingConfig config = (SysteminfoBindingConfig) bindingConfigs.get(itemName);
        return config != null ? config.commandType : null;
    }

    @Override
    public Class<? extends Item> getItemType(String itemName) {
        if (itemName == null) {
            return null;
        }

        SysteminfoBindingConfig config = (SysteminfoBindingConfig) bindingConfigs.get(itemName);
        return config != null ? config.itemType : null;
    }

    @Override
    public int getRefreshInterval(String itemName) {
        if (itemName == null) {
            return 0;
        }

        SysteminfoBindingConfig config = (SysteminfoBindingConfig) bindingConfigs.get(itemName);
        return config != null ? config.refreshInterval : 0;
    }

    @Override
    public String getTarget(String itemName) {
        if (itemName == null) {
            return null;
        }

        SysteminfoBindingConfig config = (SysteminfoBindingConfig) bindingConfigs.get(itemName);
        return config != null ? config.target : null;
    }

    class SysteminfoBindingConfig implements BindingConfig {

        public Class<? extends Item> itemType = null;
        public SysteminfoCommandType commandType;
        public int refreshInterval = 0;
        public String target = null;

        @Override
        public String toString() {
            return "SysteminfoBindingConfigElement [" + ", itemType=" + itemType + ", commandType=" + commandType
                    + ", refreshInterval=" + refreshInterval + ", target=" + target + "]";
        }

    }

}