com.day.cq.wcm.core.contentfinder.ContentFinderListInfoProviderHelper Maven / Gradle / Ivy

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 *  Copyright 2012 Adobe Systems Incorporated
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package com.day.cq.wcm.core.contentfinder;

import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;

import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.ReferenceCardinality;
import org.apache.felix.scr.annotations.ReferencePolicy;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.commons.json.JSONException;
import org.apache.sling.commons.json.JSONObject;
import org.osgi.framework.ServiceReference;
import org.osgi.service.component.ComponentContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.day.cq.commons.ListInfoProvider;
import com.day.cq.commons.servlets.AbstractPredicateServlet;

/**
 */
@Component(componentAbstract = true)
@Reference(
        referenceInterface = ListInfoProvider.class,
        name = "listInfoProvider",
        policy = ReferencePolicy.DYNAMIC,
        cardinality = ReferenceCardinality.OPTIONAL_MULTIPLE
)
public abstract class ContentFinderListInfoProviderHelper extends AbstractPredicateServlet {
    
    private static final Logger LOG = LoggerFactory.getLogger(ContentFinderListInfoProviderHelper.class);

    private static final long serialVersionUID = 7018564321415615254L;
    private ComponentContext componentContext;
    private List listInfoProviders = new CopyOnWriteArrayList();

    protected void pingCallbacksWithItem(SlingHttpServletRequest request, JSONObject jsonObject, Resource resource) {
        for (ServiceReference ref : listInfoProviders) {
            ListInfoProvider listInfoProvider = (ListInfoProvider) componentContext.locateService("listInfoProvider", ref);
            if (listInfoProvider != null) {
                try {
                    listInfoProvider.updateListItemInfo(request, jsonObject, resource);
                } catch (JSONException e) {
                    LOG.error("Unable to update jsonObject", e);
                }
            }
        }
    }
    
    // OSGi ################################################################################################################################
    protected void activate(ComponentContext componentContext) {
        this.componentContext = componentContext;    
    }
    
    protected void deactivate(ComponentContext componentContext) {
        this.componentContext = null;
    }
    
    protected void bindListInfoProvider(ServiceReference ref) {
        listInfoProviders.add(ref);
    }
    
    protected void unbindListInfoProvider(ServiceReference ref) {
        listInfoProviders.remove(ref);
    }
}