/**
* Copyright (c) 2008-2010 The Sakai 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.osedu.org/licenses/ECL-2.0
*
* 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.sakaiproject.roster.tool.entityprovider;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.sakaiproject.entitybroker.EntityReference;
import org.sakaiproject.entitybroker.EntityView;
import org.sakaiproject.entitybroker.entityprovider.annotations.EntityCustomAction;
import org.sakaiproject.entitybroker.entityprovider.capabilities.ActionsExecutable;
import org.sakaiproject.entitybroker.entityprovider.capabilities.AutoRegisterEntityProvider;
import org.sakaiproject.entitybroker.entityprovider.capabilities.Outputable;
import org.sakaiproject.entitybroker.entityprovider.extension.Formats;
import org.sakaiproject.entitybroker.exception.EntityException;
import org.sakaiproject.entitybroker.util.AbstractEntityProvider;
import org.sakaiproject.roster.api.RosterMember;
import org.sakaiproject.roster.api.RosterMemberComparator;
import org.sakaiproject.roster.api.SakaiProxy;
import org.sakaiproject.roster.impl.SakaiProxyImpl;
/**
* <code>EntityProvider</code> to allow Roster to access site, membership, and
* enrollment data for the current user. The provider respects Roster
* permissions, so shouldn't expose any data the current user should not have
* access to.
*
* @author d.b.robinson@lancaster.ac.uk
*/
public class RosterSiteEntityProvider extends AbstractEntityProvider implements
AutoRegisterEntityProvider, ActionsExecutable, Outputable {
@SuppressWarnings("unused")
private static final Log log = LogFactory.getLog(RosterSiteEntityProvider.class);
public final static String ENTITY_PREFIX = "roster-membership";
public final static String DEFAULT_ID = ":ID:";
public final static String ERROR_INVALID_SITE = "Invalid site ID";
// key passed as parameters
public final static String KEY_SORTED = "sorted";
public final static String KEY_SORT_FIELD = "sortField";
public final static String KEY_SORT_DIRECTION = "sortDirection";
public final static String KEY_GROUP_ID = "groupId";
public final static String KEY_ENROLLMENT_SET_ID = "enrollmentSetId";
public final static String KEY_INCLUDE_CONNECTION_STATUS = "includeConnectionStatus";
// defaults
public final static boolean DEFAULT_SORTED = false;
public final static String DEFAULT_SORT_FIELD = RosterMemberComparator.SORT_NAME;
public final static int DEFAULT_SORT_DIRECTION = RosterMemberComparator.SORT_ASCENDING;
private SakaiProxy sakaiProxy;
public RosterSiteEntityProvider() {
sakaiProxy = SakaiProxyImpl.instance();
}
/**
* {@inheritDoc}
*/
public String getEntityPrefix() {
return ENTITY_PREFIX;
}
@EntityCustomAction(action = "get-membership", viewKey = EntityView.VIEW_SHOW)
public Object getMembership(EntityReference reference, Map<String, Object> parameters) {
if (null == reference.getId() || DEFAULT_ID.equals(reference.getId())) {
throw new EntityException(ERROR_INVALID_SITE, reference.getReference());
}
String groupId = null;
if (parameters.containsKey(KEY_GROUP_ID)) {
groupId = parameters.get(KEY_GROUP_ID).toString();
}
Boolean includeConnectionStatus = false;
if (parameters.containsKey(KEY_INCLUDE_CONNECTION_STATUS)) {
includeConnectionStatus = Boolean.valueOf(parameters.get(
KEY_INCLUDE_CONNECTION_STATUS).toString());
}
List<RosterMember> membership = null;
// if no group ID specified, retrieve site membership, else retrieve group
if (null == groupId) {
membership = sakaiProxy.getSiteMembership(reference.getId(), includeConnectionStatus);
} else {
membership = sakaiProxy.getGroupMembership(reference.getId(), groupId);
}
if (null == membership) {
throw new EntityException("Unable to retrieve membership", reference.getReference());
}
if (true == getSortedValue(parameters)) {
Collections.sort(membership, new RosterMemberComparator(
getSortFieldValue(parameters),
getSortDirectionValue(parameters), sakaiProxy
.getFirstNameLastName()));
}
return membership;
}
@EntityCustomAction(action = "get-site", viewKey = EntityView.VIEW_SHOW)
public Object getSite(EntityReference reference) {
if (null == reference.getId() || DEFAULT_ID.equals(reference.getId())) {
throw new EntityException(ERROR_INVALID_SITE, reference.getReference());
}
return sakaiProxy.getRosterSite(reference.getId());
}
@EntityCustomAction(action = "get-enrollment", viewKey = EntityView.VIEW_SHOW)
public Object getEnrollment(EntityReference reference, Map<String, Object> parameters) {
if (null == reference.getId() || DEFAULT_ID.equals(reference.getId())) {
throw new EntityException(ERROR_INVALID_SITE, reference.getReference());
}
String enrollmentSetId = null;
if (parameters != null && parameters.containsKey(KEY_ENROLLMENT_SET_ID)) {
enrollmentSetId = parameters.get(KEY_ENROLLMENT_SET_ID).toString();
}
return sakaiProxy.getEnrollmentMembership(reference.getId(), enrollmentSetId);
}
/**
* {@inheritDoc}
*/
public String[] getHandledOutputFormats() {
return new String[] { Formats.JSON };
}
private Boolean getSortedValue(Map<String, Object> parameters) {
if (null != parameters.get(KEY_SORTED)) {
return Boolean.parseBoolean(parameters.get(KEY_SORTED).toString());
} else {
return DEFAULT_SORTED;
}
}
private int getSortDirectionValue(Map<String, Object> parameters) {
if (null != parameters.get(KEY_SORT_DIRECTION)) {
return Integer.parseInt(parameters.get(KEY_SORT_DIRECTION)
.toString());
} else {
return DEFAULT_SORT_DIRECTION;
}
}
private String getSortFieldValue(Map<String, Object> parameters) {
String sortField;
if (null != parameters.get(KEY_SORT_FIELD)) {
sortField = parameters.get(KEY_SORT_FIELD).toString();
} else {
sortField = DEFAULT_SORT_FIELD;
}
return sortField;
}
}