/**
    * Copyright 2005-2012 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.opensource.org/licenses/ecl2.php
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.kuali.rice.kns.document.authorization;
  
  import org.kuali.rice.kim.api.KimConstants;
  import org.kuali.rice.kim.api.identity.Person;
  import org.kuali.rice.krad.document.Document;
  import org.kuali.rice.krad.util.KRADConstants;
  
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  
  /**
   * Base class for all TransactionalDocumentAuthorizers.
   */
  public class TransactionalDocumentAuthorizerBase extends DocumentAuthorizerBase
  		implements TransactionalDocumentAuthorizer {
  	public final Set<String> getEditModes(Document document, Person user,
  			Set<String> editModes) {
  		Set<String> unauthorizedEditModes = new HashSet<String>();
  		for (String editMode : editModes) {
  			Map<String, String> additionalPermissionDetails = new HashMap<String, String>();
  			additionalPermissionDetails.put(KimConstants.AttributeConstants.EDIT_MODE, editMode);
  			if (permissionExistsByTemplate(
  					document,
  					KRADConstants.KRAD_NAMESPACE,
  					KimConstants.PermissionTemplateNames.USE_TRANSACTIONAL_DOCUMENT,
  					additionalPermissionDetails)
  					&& !isAuthorizedByTemplate(
  							document,
  							KRADConstants.KRAD_NAMESPACE,
  							KimConstants.PermissionTemplateNames.USE_TRANSACTIONAL_DOCUMENT,
  							user.getPrincipalId(), additionalPermissionDetails,
  							null)) {
  				unauthorizedEditModes.add(editMode);
  			}
  		}
  		editModes.removeAll(unauthorizedEditModes);
  		return editModes;
  	}
  }