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

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Here is the source code for com.smartitengineering.cms.spi.impl.content.PersistentVariationProviderImpl.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.AbstractVariationProvider;
import com.smartitengineering.cms.api.content.Field;
import com.smartitengineering.cms.api.content.Variation;
import com.google.inject.Inject;
import com.google.inject.name.Named;
import com.smartitengineering.cms.api.content.Content;
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.workspace.VariationTemplate;
import com.smartitengineering.cms.spi.content.VariationProvider;
import com.smartitengineering.cms.spi.impl.content.template.persistent.PersistentVariation;
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 PersistentVariationProviderImpl extends AbstractVariationProvider implements VariationProvider {

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

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

    @Override
    public Variation getVariation(String varName, Content content, Field field) {
        if (StringUtils.isBlank(varName) || field == null || content == null) {
            logger.info("Variation name or field or content is null or blank!");
            return null;
        }
        final TemplateId id = new TemplateId();
        id.setId(new StringBuilder(content.getContentId().toString()).append(':').append(field.getName())
                .append(':').append(varName).toString());
        PersistentVariation cachedVar = readDao.getById(id);
        boolean update = false;
        if (cachedVar != null) {
            update = true;
            Date cachedDate = cachedVar.getVariation().getLastModifiedDate();
            VariationTemplate template = SmartContentAPI.getInstance().getWorkspaceApi()
                    .getVariationTemplate(content.getContentId().getWorkspaceId(), varName);
            Date lastModified = content.getLastModifiedDate();
            if (template != null) {
                final Date lastModifiedDate = template.getLastModifiedDate();
                if (lastModified.before(lastModifiedDate)) {
                    lastModified = lastModifiedDate;
                }
            }
            if (cachedDate.before(lastModified)) {
                cachedVar = null;
            }
        }
        if (cachedVar == null) {
            Variation var = mainProvider.getVariation(varName, content, field);
            cachedVar = new PersistentVariation();
            cachedVar.setId(id);
            cachedVar.setVariation(var);
            if (update) {
                writeDao.update(cachedVar);
                Event<Variation> event = SmartContentAPI.getInstance().getEventRegistrar()
                        .<Variation>createEvent(EventType.UPDATE, Type.VARIATION, var);
                SmartContentAPI.getInstance().getEventRegistrar().notifyEventAsynchronously(event);
            } else {
                writeDao.save(cachedVar);
                Event<Variation> event = SmartContentAPI.getInstance().getEventRegistrar()
                        .<Variation>createEvent(EventType.CREATE, Type.VARIATION, var);
                SmartContentAPI.getInstance().getEventRegistrar().notifyEventAsynchronously(event);
            }
        }
        return cachedVar.getVariation();
    }
}