com.smartitengineering.cms.spi.impl.content.PersistentRepresentationProviderImpl.java Source code

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Here is the source code for com.smartitengineering.cms.spi.impl.content.PersistentRepresentationProviderImpl.java

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/*
 *
 * This is a simple Content Management System (CMS)
 * Copyright (C) 2010  Imran M Yousuf (imyousuf@smartitengineering.com)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.smartitengineering.cms.spi.impl.content;

import com.smartitengineering.cms.spi.impl.AbstractRepresentationProvider;
import com.smartitengineering.cms.spi.impl.content.template.persistent.PersistentRepresentation;
import com.google.inject.Inject;
import com.google.inject.name.Named;
import com.smartitengineering.cms.api.content.Content;
import com.smartitengineering.cms.api.content.ContentId;
import com.smartitengineering.cms.api.content.Representation;
import com.smartitengineering.cms.api.event.Event;
import com.smartitengineering.cms.api.event.Event.EventType;
import com.smartitengineering.cms.api.event.Event.Type;
import com.smartitengineering.cms.api.factory.SmartContentAPI;
import com.smartitengineering.cms.api.type.ContentType;
import com.smartitengineering.cms.api.type.ContentTypeId;
import com.smartitengineering.cms.api.workspace.RepresentationTemplate;
import com.smartitengineering.cms.spi.content.RepresentationProvider;
import com.smartitengineering.cms.spi.impl.content.template.persistent.TemplateId;
import com.smartitengineering.dao.common.CommonReadDao;
import com.smartitengineering.dao.common.CommonWriteDao;
import java.util.Date;
import org.apache.commons.lang.StringUtils;

/**
 *
 * @author imyousuf
 */
public class PersistentRepresentationProviderImpl extends AbstractRepresentationProvider
        implements RepresentationProvider {

    @Inject
    @Named("mainProvider")
    private RepresentationProvider mainProvider;
    @Inject
    private CommonReadDao<PersistentRepresentation, TemplateId> readDao;
    @Inject
    private CommonWriteDao<PersistentRepresentation> writeDao;

    @Override
    public Representation getRepresentation(String repName, ContentTypeId contentTypeId, ContentId contentId) {
        return getRepresentation(repName, contentTypeId,
                SmartContentAPI.getInstance().getContentLoader().loadContent(contentId));
    }

    @Override
    public Representation getRepresentation(String repName, ContentTypeId contentTypeId, Content content) {
        return getRepresentation(repName,
                SmartContentAPI.getInstance().getContentTypeLoader().loadContentType(contentTypeId), content);
    }

    @Override
    public Representation getRepresentation(String repName, ContentType contentType, Content content) {
        if (StringUtils.isBlank(repName) || contentType == null || content == null) {
            logger.info("Representation name or content type or content is null or blank!");
            return null;
        }
        final TemplateId id = new TemplateId();
        id.setId(new StringBuilder(content.getContentId().toString()).append(':').append(repName).toString());
        PersistentRepresentation cachedRep = readDao.getById(id);
        boolean update = false;
        if (cachedRep != null) {
            update = true;
            Date cachedDate = cachedRep.getRepresentation().getLastModifiedDate();
            RepresentationTemplate template = SmartContentAPI.getInstance().getWorkspaceApi()
                    .getRepresentationTemplate(content.getContentId().getWorkspaceId(), repName);
            Date lastModified = content.getLastModifiedDate();
            if (template != null) {
                final Date lastModifiedDate = template.getLastModifiedDate();
                if (lastModified.before(lastModifiedDate)) {
                    lastModified = lastModifiedDate;
                }
            }
            if (cachedDate.before(lastModified)) {
                cachedRep = null;
            }
        }
        if (cachedRep == null) {
            Representation rep = mainProvider.getRepresentation(repName, contentType, content);
            cachedRep = new PersistentRepresentation();
            cachedRep.setId(id);
            cachedRep.setRepresentation(rep);
            if (update) {
                writeDao.update(cachedRep);
                Event<Representation> event = SmartContentAPI.getInstance().getEventRegistrar()
                        .<Representation>createEvent(EventType.UPDATE, Type.REPRESENTATION, rep);
                SmartContentAPI.getInstance().getEventRegistrar().notifyEventAsynchronously(event);
            } else {
                writeDao.save(cachedRep);
                Event<Representation> event = SmartContentAPI.getInstance().getEventRegistrar()
                        .<Representation>createEvent(EventType.CREATE, Type.REPRESENTATION, rep);
                SmartContentAPI.getInstance().getEventRegistrar().notifyEventAsynchronously(event);
            }
        }
        return cachedRep.getRepresentation();
    }

    @Override
    public boolean isValidTemplate(RepresentationTemplate template) {
        return mainProvider.isValidTemplate(template);
    }
}