@Override
@SuppressWarnings("rawtypes")
public int getCount(String jpql, T entity) throws DaoExceptions {
if (jpql == null || jpql.length() <= 0) {
jpql = "select count(o) from " + this.entityName + " o";
}
final Map map = JPAHelper.buildReflectJpql(jpql, entity);
final Object[] params = JPAHelper.getParams(map);
String JPQL = JPAHelper.getJpql(map);
JPQL = JPQL.substring(0, JPQL.lastIndexOf("order"));
final Query query = this.entityManager.createQuery(JPQL);
if ((null != params) && (params.length > 0)) {
for (int i = 0; i < params.length; i++) {
query.setParameter(i + 1, params[i]);
}
}
return Integer.parseInt(query.getSingleResult() + "");
}
@Override
@SuppressWarnings({"rawtypes", "unchecked"})
public List<T> getCollection(String jpql, T entity, String[] attributes, boolean pageFlag)
throws DaoExceptions {
if (jpql == null || jpql.length() <= 0) {
jpql = "select o from " + this.entityName + " o";
}
if (!JPAHelper.validJpql(jpql)) {
throw new DaoExceptions("JPQL语句不合法,请核实!");
}
final Map map = JPAHelper.buildReflectJpql(jpql, entity);
String JPQL = JPAHelper.getJpql(map);
Object[] params = JPAHelper.getParams(map);
if (attributes != null && attributes.length > 0) {
StringBuilder builder = new StringBuilder();
builder.append(" order by");
for (String attribute : attributes) {
builder.append(" o." + attribute + " ,");
}
String orderString = builder.substring(0, builder.lastIndexOf(",")) + " desc";
JPQL = JPQL.substring(0, JPQL.lastIndexOf("order")) + orderString;
}
final Query query = entityManager.createQuery(JPQL);
if (null != params && params.length > 0) {
for (int i = 0; i < params.length; i++) {
query.setParameter(i + 1, params[i]);
}
}
List<T> entities = new ArrayList<T>();
if (pageFlag) {
entities =
query
.setFirstResult(entity.getEndSize())
.setMaxResults(entity.getPageSize())
.getResultList();
} else {
entities = query.getResultList();
}
return entities;
}