com.sonicle.webtop.core.app.ComponentsManager.java Source code

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Here is the source code for com.sonicle.webtop.core.app.ComponentsManager.java

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/*
 * WebTop Services is a Web Application framework developed by Sonicle S.r.l.
 * Copyright (C) 2014 Sonicle S.r.l.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by
 * the Free Software Foundation with the addition of the following permission
 * added to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED
 * WORK IN WHICH THE COPYRIGHT IS OWNED BY SONICLE, SONICLE DISCLAIMS THE
 * WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301 USA.
 *
 * You can contact Sonicle S.r.l. at email address sonicle@sonicle.com
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License
 * version 3, these Appropriate Legal Notices must retain the display of the
 * Sonicle logo and Sonicle copyright notice. If the display of the logo is not
 * reasonably feasible for technical reasons, the Appropriate Legal Notices must
 * display the words "Copyright (C) 2014 Sonicle S.r.l.".
 */
package com.sonicle.webtop.core.app;

import com.sonicle.webtop.core.app.provider.RecipientsProviderBase;
import com.sonicle.webtop.core.sdk.WTRuntimeException;
import com.sonicle.webtop.core.sdk.interfaces.IConnectionProvider;
import com.sonicle.webtop.core.sdk.interfaces.IServiceSettingReader;
import java.lang.reflect.Constructor;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import org.apache.commons.collections.map.MultiValueMap;
import org.slf4j.Logger;

/**
 *
 * @author malbinola
 */
public class ComponentsManager {
    private static final Logger logger = WT.getLogger(ServiceManager.class);
    private static boolean initialized = false;

    /**
     * Initialization method. This method should be called once.
     * 
     * @param wta WebTopApp instance.
     * @return The instance.
     */
    public static synchronized ComponentsManager initialize(WebTopApp wta) {
        if (initialized)
            throw new RuntimeException("Initialization already done");
        ComponentsManager comm = new ComponentsManager(wta);
        initialized = true;
        logger.info("ComponentsManager initialized");
        return comm;
    }

    private WebTopApp wta = null;

    /**
     * Private constructor.
     * Instances of this class must be created using static initialize method.
     * @param wta WebTopApp instance.
     */
    private ComponentsManager(WebTopApp wta) {
        this.wta = wta;
    }

    /**
     * Performs cleanup process.
     */
    public void cleanup() {
        wta = null;
    }

    private final HashSet<Class<?>> registeredClasses = new HashSet<>();
    private static final MultiValueMap recipientsProviderClasses = MultiValueMap
            .decorate(new LinkedHashMap<String, Class<RecipientsProviderBase>>());

    public static boolean canBeRegistered(final Class<?> clazz) {
        if (isAssignableTo(clazz, RecipientsProviderBase.class))
            return true;
        return false;
    }

    private static boolean isAssignableTo(Class clazz, Class baseClass) {
        if (clazz == null)
            return false;
        return baseClass.isAssignableFrom(clazz);
    }

    public void register(String providerId, Class clazz) {
        String className = clazz.getCanonicalName();
        synchronized (registeredClasses) {
            if (registeredClasses.contains(clazz))
                throw new WTRuntimeException("Class already registered [{0}]", clazz.getCanonicalName());
            if (canBeRegistered(clazz)) {
                registeredClasses.add(clazz);
            } else {
                throw new WTRuntimeException("Class cannot be registered [{0}]", clazz.getCanonicalName());
            }

            if (isAssignableTo(clazz, RecipientsProviderBase.class)) {
                recipientsProviderClasses.put(providerId, clazz);
            } else {
                throw new WTRuntimeException("Class cannot be registered [{0}]", className);
            }
        }
    }

    public List<Class<RecipientsProviderBase>> getRecipientsProviderClasses(String providerId) {
        synchronized (registeredClasses) {
            if (recipientsProviderClasses.containsKey(providerId)) {
                return new ArrayList<>(
                        (Collection<Class<RecipientsProviderBase>>) recipientsProviderClasses.get(providerId));
            } else {
                return null;
            }
        }
    }

    public RecipientsProviderBase instantiateRecipientsProvider(Class<RecipientsProviderBase> clazz) {
        try {
            //Constructor<RecipientsProviderBase> constructor = clazz.getConstructor(IConnectionProvider.class, IServiceSettingReader.class);
            //return constructor.newInstance(wta.getConnectionManager(), wta.getSettingsManager());
            return (RecipientsProviderBase) clazz.newInstance();
        } catch (Exception ex) {
            logger.error("Error instantiating RecipientsProvider [{}]", clazz.getCanonicalName(), ex);
            throw new WTRuntimeException("Error instantiating RecipientsProvider [{0}]", clazz.getCanonicalName());
        }
    }
}