public FortunePage() {
Session session = HibernateUtil.getSessionFactory().openSession();
Query query = session.createQuery("from Fortune");
query.setReadOnly(true);
List list = query.list();
List<Fortune> fortunes = new ArrayList<Fortune>(list);
session.close();
Fortune newFortune = new Fortune();
newFortune.message = "Additional fortune added at request time.";
fortunes.add(newFortune);
sort(fortunes);
ListView<Fortune> listView =
new ListView<Fortune>("fortunes", fortunes) {
@Override
protected void populateItem(ListItem<Fortune> item) {
Fortune fortune = item.getModelObject();
item.add(new Label("id", fortune.id));
item.add(new Label("message", fortune.message));
}
};
add(listView);
}
private <T> List<T> executeQuery(
Query query, int numColumns, LastModificationDateFactory<T> lastModificationDateFactory) {
query.setReadOnly(true);
query.setCacheable(false);
ScrollableResults scrollableResults = query.scroll(ScrollMode.FORWARD_ONLY);
final List<T> dates = new ArrayList<>();
int resultsCount = 0;
int datesCount = 0;
while (scrollableResults.next()) {
resultsCount++;
Object[] row = scrollableResults.get();
T date = extractLastModificationDate(row, numColumns, lastModificationDateFactory);
if (date != null) {
dates.add(date);
datesCount++;
}
}
if (resultsCount > datesCount) {
LOGGER.warn(
"Got {} in result set and {} dates. query= {}",
resultsCount,
datesCount,
query.getQueryString());
} else {
LOGGER.debug("Got {} in result set and {} dates.", resultsCount, datesCount);
}
return dates;
}
private Query createQuery(
String queryString, @Nullable QueryModifiers modifiers, boolean forCount) {
Query query = session.createQuery(queryString);
HibernateUtil.setConstants(query, getConstants(), getMetadata().getParams());
if (fetchSize > 0) {
query.setFetchSize(fetchSize);
}
if (timeout > 0) {
query.setTimeout(timeout);
}
if (cacheable != null) {
query.setCacheable(cacheable);
}
if (cacheRegion != null) {
query.setCacheRegion(cacheRegion);
}
if (comment != null) {
query.setComment(comment);
}
if (readOnly != null) {
query.setReadOnly(readOnly);
}
for (Map.Entry<Path<?>, LockMode> entry : lockModes.entrySet()) {
query.setLockMode(entry.getKey().toString(), entry.getValue());
}
if (flushMode != null) {
query.setFlushMode(flushMode);
}
if (modifiers != null && modifiers.isRestricting()) {
if (modifiers.getLimit() != null) {
query.setMaxResults(modifiers.getLimit().intValue());
}
if (modifiers.getOffset() != null) {
query.setFirstResult(modifiers.getOffset().intValue());
}
}
// set transformer, if necessary
List<? extends Expression<?>> projection = getMetadata().getProjection();
if (projection.size() == 1 && !forCount) {
Expression<?> expr = projection.get(0);
if (expr instanceof FactoryExpression<?>) {
query.setResultTransformer(
new FactoryExpressionTransformer((FactoryExpression<?>) projection.get(0)));
}
} else if (!forCount) {
FactoryExpression<?> proj = FactoryExpressionUtils.wrap(projection);
if (proj != null) {
query.setResultTransformer(new FactoryExpressionTransformer(proj));
}
}
return query;
}
@Override
public void open() {
currentRecordNumber = 0;
Query hibernateQuery = session.createQuery(query);
hibernateQuery.setReadOnly(true);
if (maxResults >= 1) {
hibernateQuery.setMaxResults(maxResults);
}
if (fetchSize >= 1) {
hibernateQuery.setFetchSize(fetchSize);
}
scrollableResults = hibernateQuery.scroll(ScrollMode.FORWARD_ONLY);
}
/**
* Creates the Hibernate query object.
*
* <p>If the value of the {@link
* JRHibernateQueryExecuterFactory#PARAMETER_HIBERNATE_FILTER_COLLECTION
* PARAMETER_HIBERNATE_FILTER_COLLECTION} is not null, then a filter query is created using the
* value of the parameter as the collection.
*
* @param queryString the query string
*/
protected synchronized void createQuery(String queryString) {
if (log.isDebugEnabled()) {
log.debug("HQL query: " + queryString);
}
Object filterCollection =
getParameterValue(JRHibernateQueryExecuterFactory.PARAMETER_HIBERNATE_FILTER_COLLECTION);
if (filterCollection == null) {
query = session.createQuery(queryString);
} else {
query = session.createFilter(filterCollection, queryString);
}
query.setReadOnly(true);
int fetchSize =
JRProperties.getIntegerProperty(
dataset, JRJdbcQueryExecuterFactory.PROPERTY_JDBC_FETCH_SIZE, 0);
if (fetchSize != 0) {
query.setFetchSize(fetchSize);
}
setParameters();
}
protected void applyReadOnly(boolean isReadOnly) {
query.setReadOnly(isReadOnly);
}
