LatestPersistentRepresentationVersionSelector.java

package eu.europeana.cloud.common.selectors;

import com.eaio.uuid.UUID;
import eu.europeana.cloud.common.model.Representation;

import java.util.List;

/**
 * Selects latest persistent representation from list of provided representations
 */
public class LatestPersistentRepresentationVersionSelector implements RepresentationSelector {

    @Override
    public Representation select(List<Representation> representations) {

        Representation representationToBeReturned = null;
        
        for (Representation representation : representations) {
            if (representation.isPersistent()) {
                if (representationToBeReturned != null) {
                    UUID uuid = new UUID(representation.getVersion());
                    UUID uuid_1 = new UUID(representationToBeReturned.getVersion());
                    if (uuid.compareTo(uuid_1) > 0) {
                        representationToBeReturned = representation;
                    }
                } else {
                    representationToBeReturned = representation;
                }
            }
        }
        return representationToBeReturned;
    }
}