public <T> T newObj(Class<T> c) {
try {
return newObj(c.getConstructor().newInstance());
} catch (Exception e) {
LOG.warning(e);
}
return null;
}
public <T> T saveObj(T obj) {
PersistenceManager pm = pmf.getPersistenceManager();
try {
return pm.makePersistent(obj);
} catch (Throwable e) {
LOG.warning(e);
} finally {
pm.close();
}
return obj;
}
public <T> T getArbitrary(Class<T> classObj) {
PersistenceManager pm = pmf.getPersistenceManager();
try {
Extent<T> result = pm.getExtent(classObj, false);
return result.iterator().next();
} catch (Throwable e) {
LOG.warning(e);
} finally {
pm.close();
}
return null;
}
public <T> List<T> getAll(Class<T> c) {
PersistenceManager pm = pmf.getPersistenceManager();
try {
Extent<T> result = pm.getExtent(c, false);
List<T> buffer = new ArrayList<T>();
for (T t : result) {
buffer.add(t);
}
return buffer;
} catch (Throwable e) {
LOG.warning(e);
} finally {
pm.close();
}
return new ArrayList<T>();
}
public <T> List<T> getQuery(
Class<T> c, String queryString, String parameterDeclaration, Object... parameters) {
PersistenceManager pm = pmf.getPersistenceManager();
try {
Query query = pm.newQuery(c, queryString);
query.declareParameters(parameterDeclaration);
List<T> list = (List<T>) query.executeWithArray(parameters);
List<T> buffer = new ArrayList<T>();
for (T t : list) {
buffer.add(t);
}
query.closeAll();
return buffer;
} catch (Throwable e) {
LOG.warning(e);
} finally {
pm.close();
}
return new ArrayList<T>();
}