RoleImportResource.java

/*
 * Copyright (C) 2003-2017 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.exoplatform.management.organization.role;

import java.io.InputStream;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

import org.exoplatform.management.common.AbstractOperationHandler;
import org.exoplatform.management.organization.OrganizationManagementExtension;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import org.exoplatform.services.organization.MembershipType;
import org.exoplatform.services.organization.OrganizationService;
import org.exoplatform.services.organization.impl.MembershipTypeImpl;
import org.gatein.management.api.exceptions.OperationException;
import org.gatein.management.api.operation.OperationAttachment;
import org.gatein.management.api.operation.OperationAttributes;
import org.gatein.management.api.operation.OperationContext;
import org.gatein.management.api.operation.OperationNames;
import org.gatein.management.api.operation.ResultHandler;
import org.gatein.management.api.operation.model.NoResultModel;

import com.thoughtworks.xstream.XStream;

/**
 * The Class RoleImportResource.
 *
 * @author <a href="mailto:boubaker.khanfir@exoplatform.com">Boubaker
 *         Khanfir</a>
 */
public class RoleImportResource extends AbstractOperationHandler {
  
  /** The Constant log. */
  private static final Log log = ExoLogger.getLogger(RoleImportResource.class);
  
  /** The organization service. */
  private OrganizationService organizationService = null;

  /**
   * {@inheritDoc}
   */
  @Override
  public void execute(OperationContext operationContext, ResultHandler resultHandler) throws OperationException {
    if (organizationService == null) {
      organizationService = operationContext.getRuntimeContext().getRuntimeComponent(OrganizationService.class);
    }

    InputStream attachmentInputStream = null;

    OperationAttributes attributes = operationContext.getAttributes();
    List<String> filters = attributes.getValues("filter");

    // "replace-existing" attribute. Defaults to false.
    boolean replaceExisting = filters.contains("replace-existing:true");

    // get attachement input stream
    OperationAttachment attachment = operationContext.getAttachment(false);
    attachmentInputStream = attachment.getStream();

    final ZipInputStream zin = new ZipInputStream(attachmentInputStream);
    try {
      ZipEntry entry;
      try {
        while ((entry = zin.getNextEntry()) != null) {
          try {
            String filePath = entry.getName();
            if (!filePath.startsWith(OrganizationManagementExtension.PATH_ORGANIZATION + "/" + OrganizationManagementExtension.PATH_ORGANIZATION_ROLE + "/")) {
              continue;
            }
            if (entry.isDirectory() || filePath.trim().isEmpty() || !filePath.endsWith(".xml")) {
              continue;
            }
            if (filePath.endsWith("_role.xml")) {
              log.debug("Parsing : " + filePath);
              createRole(zin, replaceExisting);
            }
          } finally {
            try {
              zin.closeEntry();
            } catch (Exception e) {
              // Already closed, expected
            }
          }
        }
      } finally {
        zin.close();
      }
      resultHandler.completed(NoResultModel.INSTANCE);
    } catch (Exception e) {
      throw new OperationException(OperationNames.IMPORT_RESOURCE, "Error while reading group from Stream.", e);
    }
  }

  /**
   * Creates the role.
   *
   * @param zin the zin
   * @param replaceExisting the replace existing
   * @throws Exception the exception
   */
  private void createRole(final ZipInputStream zin, Boolean replaceExisting) throws Exception {
    MembershipType membershipType = deserializeObject(zin, MembershipTypeImpl.class);
    MembershipType oldMembershipType = organizationService.getMembershipTypeHandler().findMembershipType(membershipType.getName());
    boolean alreadyExists = (oldMembershipType != null);
    if (alreadyExists && replaceExisting) {
      log.info("ReplaceExisting is On: Deleting role '" + membershipType.getName() + "'");
      organizationService.getMembershipTypeHandler().removeMembershipType(membershipType.getName(), true);
      oldMembershipType = null;
    }
    if (oldMembershipType == null) {
      organizationService.getMembershipTypeHandler().createMembershipType(membershipType, true);
    } else {
      log.info("ReplaceExisting is Off: Ignoring role '" + membershipType.getName() + "'");
    }
  }

  /**
   * Deserialize object.
   *
   * @param <T> the generic type
   * @param zin the zin
   * @param objectClass the object class
   * @return the t
   */
  private <T> T deserializeObject(final ZipInputStream zin, Class<T> objectClass) {
    XStream xStream = new XStream();
    xStream.alias("organization", objectClass);
    @SuppressWarnings("unchecked")
    T object = (T) xStream.fromXML(zin);
    return object;
  }
}