ru.ksu.niimm.cll.mocassin.frontend.viewer.server.ViewerServiceImpl.java Source code

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/*******************************************************************************
 * Copyright (c) 2010-2012 Nikita Zhiltsov.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Nikita Zhiltsov - initial API and implementation
 *     Azat Khasanshin - implementation
 ******************************************************************************/
package ru.ksu.niimm.cll.mocassin.frontend.viewer.server;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import org.slf4j.Logger;

import ru.ksu.niimm.cll.mocassin.frontend.viewer.client.ArticleInfo;
import ru.ksu.niimm.cll.mocassin.frontend.viewer.client.Graph;
import ru.ksu.niimm.cll.mocassin.frontend.viewer.client.ViewerService;
import ru.ksu.niimm.cll.mocassin.frontend.viewer.server.util.OntologyElementConverter;
import ru.ksu.niimm.cll.mocassin.rdf.ontology.OntologyResource;
import ru.ksu.niimm.cll.mocassin.rdf.ontology.OntologyResourceFacade;
import ru.ksu.niimm.cll.mocassin.rdf.ontology.SGEdge;
import ru.ksu.niimm.cll.mocassin.util.inject.log.InjectLogger;
import ru.ksu.niimm.cll.mocassin.util.model.ArticleMetadata;
import ru.ksu.niimm.cll.mocassin.util.model.Author;
import ru.ksu.niimm.cll.mocassin.util.model.Link;

import com.google.common.collect.Iterables;
import com.google.inject.Inject;

public class ViewerServiceImpl implements ViewerService {
    @InjectLogger
    private Logger logger;
    @Inject
    private OntologyResourceFacade ontologyResourceFacade;
    @Inject
    private OntologyElementConverter ontologyElementConverter;

    @Override
    public ArticleInfo load(String uri) {
        ArticleMetadata metadata = ontologyResourceFacade.load(new OntologyResource(uri));
        if (metadata == null) {
            logger.warn("Not found metadata for URI='{}'. Stub will be returned", uri);
            metadata = new ArticleMetadata();
        }
        ArticleInfo info = new ArticleInfo();
        info.setKey(metadata.getCollectionId());
        info.setUri(metadata.getId());
        info.setTitle(metadata.getTitle());
        info.setCurrentSegmentUri(metadata.getCurrentSegmentUri());
        info.setCurrentPageNumber(metadata.getCurrentPageNumber());
        Set<Author> authors = metadata.getAuthors();
        List<String> authorNames = new ArrayList<String>();
        for (Author author : authors) {
            authorNames.add(author.getName());
        }
        info.setAuthors(authorNames);
        Link pdfLink = Iterables.find(metadata.getLinks(), new Link.PdfLinkPredicate(), Link.nullPdfLink());
        info.setPdfUri(pdfLink.getHref());
        return info;
    }

    @Override
    public Graph retrieveGraph(String uri) {
        List<SGEdge> triples = this.ontologyResourceFacade.retrieveStructureGraph(new OntologyResource(uri));
        return this.ontologyElementConverter.convert(triples);
    }

}