private ArrayList<StudentPersonalType> fetchStudents(
HashMap<String, StudentPersonalType> studentMap, PagingInfo pagingInfo) {
ArrayList<StudentPersonalType> studentList = new ArrayList<StudentPersonalType>();
if (pagingInfo == null) // return all
{
studentList.addAll(studentMap.values());
} else {
pagingInfo.setTotalObjects(studentMap.size());
if ((pagingInfo.getPageSize() * (pagingInfo.getCurrentPageNo())) > studentMap.size()) {
return null; // Requested page outside of limits.
}
// retrieve applicable students
Collection<StudentPersonalType> allStudent = studentMap.values();
int i = 0;
int startPos = pagingInfo.getPageSize() * pagingInfo.getCurrentPageNo();
int endPos = startPos + pagingInfo.getPageSize();
for (Iterator<StudentPersonalType> iter = allStudent.iterator(); iter.hasNext(); ) {
StudentPersonalType student = iter.next();
if ((i >= startPos) && (i < endPos)) {
studentList.add(student);
}
i++;
}
// Set the number of object that are returned in the paging info. Will ensure HTTP headers are
// set correctly.
pagingInfo.setPageSize(studentList.size());
}
return studentList;
}
/* (non-Javadoc)
* @see sif3.common.interfaces.Provider#retrive(sif3.common.model.SIFZone, sif3.common.model.SIFContext, sif3.common.model.PagingInfo)
*/
@Override
public Object retrieve(
SIFZone zone,
SIFContext context,
PagingInfo pagingInfo,
RequestMetadata metadata,
ResponseParameters customResponseParams)
throws PersistenceException, UnsupportedQueryException, DataTooLargeException {
logger.debug(
"Retrieve Students for "
+ getZoneAndContext(zone, context)
+ " and RequestMetadata = "
+ metadata);
logger.debug("ChangedSince Date: " + metadata.getRequestParameter("ChangedSince"));
logger.debug("Custom HTTP Header (customHdr): " + metadata.getHTTPParameter("customHdr"));
// Should go all the way to consumer
customResponseParams.addHTTPHeaderParameter("testHTTPResponseParam", "testValue");
// Should override a default from the provider properties file.
customResponseParams.addHTTPHeaderParameter("test", "providerPropertyFileOverride");
// Should be overridden by framework
customResponseParams.addHTTPHeaderParameter(
ResponseHeaderConstants.HDR_DATE_TIME, "ignore this date/time");
if (pagingInfo == null) {
throw new DataTooLargeException(
"No paging info is provided. Please provide navigationPage and navigationPageSize.");
} else {
// We may want to set the navigationID! Here we set it as a GUID but only if we are on the
// first page because it is expected that in subsequent
// paged calls that the consumer would provide that id.
if (pagingInfo.getCurrentPageNo() == CommonConstants.FIRST_PAGE) {
// pagingInfo.setNavigationId(UUIDGenerator.getUUID());
}
}
ArrayList<StudentPersonalType> studentList = fetchStudents(students, pagingInfo);
StudentPersonalCollectionType studentCollection =
dmObjectFactory.createStudentPersonalCollectionType();
if (studentList != null) {
studentCollection.getStudentPersonal().addAll(studentList);
return studentCollection;
} else {
return null;
}
}
