com.day.cq.search.eval.CollectionPredicateEvaluator Maven / Gradle / Ivy

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package com.day.cq.search.eval;

import javax.jcr.query.Row;

import org.apache.felix.scr.annotations.Component;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.resource.collection.ResourceCollection;

import com.day.cq.search.Predicate;

/**
 * Finds items that are member of a specific
 * 
 * sling resource collection.
 *
 * 
 * This is a filtering-only predicate and cannot leverage a search index.
 * Does not support facet extraction.
 *
 * 
Name:
 * memberOf
 *
 * Properties:
 * 
 * memberOf
 * path of sling resource collection
 * 
 *
 * @since 6.0
 */
@Component(metatype = false, factory = "com.day.cq.search.eval.PredicateEvaluator/memberOf")
public class CollectionPredicateEvaluator extends AbstractPredicateEvaluator {
    public static final String COLLECTION = "memberOf";


    @Override
    public boolean includes(Predicate p, Row row, EvaluationContext context) {
        if (!p.hasNonEmptyValue(COLLECTION)) {
            return true;
        }
        Resource colRes = context.getResourceResolver().getResource(p.get(COLLECTION));
        if (colRes != null) {
            ResourceCollection collection = colRes.adaptTo(ResourceCollection.class);

            final Resource resource = context.getResource(row);
            return collection.contains(resource);
        }

        //return false if the collection does not exist now.
        return false;
    }



    @Override
    public boolean canXpath(Predicate predicate, EvaluationContext context) {
        return false;
    }

    @Override
    public boolean canFilter(Predicate predicate, EvaluationContext context) {
        return true;
    }

}