IdentifierProjection does not work with composite keys
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Key: HHH-1088
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1088
Project: Hibernate3
Type: Bug
Versions: 3.1 rc2
Reporter: Max Muermann
Priority: Minor
When working with Criteria queries, the IdentifierProjection breaks if the entity has a composite key.
In IdentifierProjection.java:
public String toSqlString(Criteria criteria, int position, CriteriaQuery criteriaQuery)
throws HibernateException {
StringBuffer buf = new StringBuffer();
String[] cols = criteriaQuery.getIdentifierColumns(criteria);
for ( int i=0; i<cols.length; i++ ) {
buf.append( cols[i] )
.append(" as y")
.append(position + i)
.append('_');
}
return buf.toString();
}
This method does not add commas as separators between the column names. Easily fixed by adding
if (i<col.length-1)
buf.append(",");
as the last statement inside the loop.
However, this leads to another problem:
the type returned by IdentifierProjection.geType is the (single) type of the composite id component. The query will however return the property values of the id component without a mapping step.
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