/* (c) 2015 - 2016 Open Source Geospatial Foundation - all rights reserved
 * This code is licensed under the GPL 2.0 license, available at the root
 * application directory.
 */
package org.geoserver.platform.resource;

import java.util.logging.Level;
import java.util.logging.Logger;

import org.geoserver.platform.GeoServerExtensions;
import org.geotools.util.logging.Logging;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * Factory for ResourceStore creation. Looks for a resourceStoreImpl bean before falling back
 * to the dataDirectoryResourceStore bean. Used to override ResourceStore implementation if
 * desired.
 */
public class ResourceStoreFactory implements FactoryBean<ResourceStore>, ApplicationContextAware {

    final Logger LOGGER = Logging.getLogger("org.geoserver.platform");

    private ApplicationContext applicationContext;

    @Override
    public ResourceStore getObject() throws Exception {

        ResourceStore resourceStore = null;
        try {
            resourceStore = (ResourceStore) GeoServerExtensions.bean(
                    "resourceStoreImpl", applicationContext);
        }
        catch (NoSuchBeanDefinitionException e) {
            LOGGER.log(Level.FINER, "No resourceStoreImpl beans found, "
                    + "falling back to DataDirectoryResourceStore");
        }
        if (resourceStore == null) {
            resourceStore = (ResourceStore) GeoServerExtensions.bean(
                    "dataDirectoryResourceStore", applicationContext);
        }

        return resourceStore;
    }

    @Override
    public Class<?> getObjectType() {
        return null;
    }

    @Override
    public boolean isSingleton() {
        return true;
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext)
            throws BeansException {
        this.applicationContext = applicationContext;
    }
}