MondrianLookupMapUserRoleListMapper.java

package org.pentaho.platform.plugin.action.mondrian.mapper;
/*
 * This program is free software; you can redistribute it and/or modify it under the 
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software 
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this 
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html 
 * or from the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 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 Lesser General Public License for more details.
 *
 * Copyright 2005 - 2009 Pentaho Corporation.  All rights reserved.
 *
 *
 * Created December 12, 2009
 * @author Marc Batchelor
 */

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Map;

import org.springframework.beans.factory.InitializingBean;
import org.springframework.util.Assert;

public class MondrianLookupMapUserRoleListMapper extends MondrianAbstractPlatformUserRoleMapper implements InitializingBean {

  private Map<String, String> lookupMap;

  /**
   * This version of the mapper uses a map that would be supplied in the spring configuration
   * file. For every platform role that the user has, it looks into the supplied map for
   * the corresponding role name. Then, the resulting role gets bounced against the roles
   * in the given catalog and only those roles are returned.
   * 
   * Example:
   * Platform Role        Mondrian Role     Mondrian Catalog(s)
   * Sales                M_SALES           Accting_Cat, Sales_Cat
   * Marketing            M_MKTING          Sales_Cat
   * CEO
   * CTO
   * Engineering          M_ENG             Eng_Cat, Presales_Cat
   * Support              M_ENG             Presales_Cat, Services_Cat
   * Services             M_SVCS            Presales_Cat
   * 
   * If user Joe has Sales , and CEO as roles, he connects to the Accting_Cat, or Sales_Cat catalogs,
   * he will be connected with the mondrian role M_SALES.
   * 
   * If user Tiffany is in the Engineering and Services roles, and connects to the Presales_Cat catalog, 
   * she will receive the role M_ENG,M_SVCS (which mondrian will resolve additively).
   * 
   */
  protected String[] mapRoles(String[] mondrianRoles, String[] platformRoles) {
    String[] rtn = null;
    // This mapper doesn't need the mondrian catalog to do the mapping
    if ( (mondrianRoles != null) && (platformRoles != null) ) {
      ArrayList<String> mappedRolesList = new ArrayList<String>();
      String aRole = null;
      for (int i=0; i<platformRoles.length; i++) {
        aRole = lookupMap.get(platformRoles[i]); // Find what the platform role maps to in all of mondrian
        if (aRole != null) { // OK, we found it.
          int foundIdx = Arrays.binarySearch(mondrianRoles, aRole); // For this model, does the mapped entity exist?
          if (foundIdx >=0) { // >=0 means we have it.
            mappedRolesList.add(aRole);
          }
        }
      }
      if (mappedRolesList.size() > 0) {
        // We were able to map the roles - return the mappings.
        rtn = mappedRolesList.toArray(new String[mappedRolesList.size()]);
      }
    }
    return rtn;
  }
  
  public void setLookupMap(Map<String, String> value) {
    this.lookupMap = value;
  }
  
  public Map<String, String> getLookupMap() {
    return this.lookupMap;
  }

  public void afterPropertiesSet() throws Exception {
    Assert.notNull(this.lookupMap);
  }
  
}