@Override
public Type getTypeUsingProjection(Criteria subcriteria, String propertyName)
throws HibernateException {
// first look for a reference to a projection alias
final Projection projection = rootCriteria.getProjection();
Type[] projectionTypes =
projection == null ? null : projection.getTypes(propertyName, subcriteria, this);
if (projectionTypes == null) {
try {
// it does not refer to an alias of a projection,
// look for a property
return getType(subcriteria, propertyName);
} catch (HibernateException he) {
// not found in inner query , try the outer query
if (outerQueryTranslator != null) {
return outerQueryTranslator.getType(subcriteria, propertyName);
} else {
throw he;
}
}
} else {
if (projectionTypes.length != 1) {
// should never happen, i think
throw new QueryException("not a single-length projection: " + propertyName);
}
return projectionTypes[0];
}
}
/** Get the names of the columns constrained by this criterion. */
@Override
public String[] getColumnsUsingProjection(Criteria subcriteria, String propertyName)
throws HibernateException {
// first look for a reference to a projection alias
final Projection projection = rootCriteria.getProjection();
String[] projectionColumns = null;
if (projection != null) {
projectionColumns =
(projection instanceof EnhancedProjection
? ((EnhancedProjection) projection)
.getColumnAliases(propertyName, 0, rootCriteria, this)
: projection.getColumnAliases(propertyName, 0));
}
if (projectionColumns == null) {
// it does not refer to an alias of a projection,
// look for a property
try {
return getColumns(propertyName, subcriteria);
} catch (HibernateException he) {
// not found in inner query , try the outer query
if (outerQueryTranslator != null) {
return outerQueryTranslator.getColumnsUsingProjection(subcriteria, propertyName);
} else {
throw he;
}
}
} else {
// it refers to an alias of a projection
return projectionColumns;
}
}
/**
* Determines the column name corresponding to the specified property path.
*
* @param propertyName The property path
* @param criteria The criteria
* @param criteriaQuery The criteria query
* @return The column name
* @throws HibernateException If the property could not be resolved, or more than one column is
* mapped by the property path.
*/
public static String findColumn(
String propertyName, Criteria criteria, CriteriaQuery criteriaQuery) {
final String[] columns = criteriaQuery.findColumns(propertyName, criteria);
if (columns.length != 1) {
throw new HibernateException(
"Spatial Expression may only be used with single-column properties");
}
return columns[0];
}
/**
* Get the names of the columns mapped by a property path; if the property path is not found in
* subcriteria, try the "outer" query. Projection aliases are ignored.
*/
public String[] findColumns(String propertyName, Criteria subcriteria) throws HibernateException {
try {
return getColumns(propertyName, subcriteria);
} catch (HibernateException he) {
// not found in inner query, try the outer query
if (outerQueryTranslator != null) {
return outerQueryTranslator.findColumns(propertyName, subcriteria);
} else {
throw he;
}
}
}
/**
* Determines the {@code SpatialDialect} for the specified {@code CriteriaQuery}, and checks if
* the specified function is supported.
*
* @param criteriaQuery The {@code CriteriaQuery} for which the dialect is sought
* @param function The function for which to check support
* @return The {@code SpatialDialect} associated with the specified {@code CriteriaQuery}
* @throws HibernateException If the dialect for the specified {@code CriteriaQuery} is not a
* {@code SpatialDialect}. or the specified {@code SpatialFunction} is not supported by the
* dialect.
*/
public static SpatialDialect getSpatialDialect(
CriteriaQuery criteriaQuery, SpatialFunction function) {
final Dialect dialect = criteriaQuery.getFactory().getDialect();
if (!(dialect instanceof SpatialDialect)) {
throw new HibernateException("A spatial expression requires a spatial dialect.");
}
final SpatialDialect spatialDialect = (SpatialDialect) dialect;
if (!spatialDialect.supports(function)) {
throw new HibernateException(function + " function not supported by this dialect");
}
return spatialDialect;
}
