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1 package org.hibernate.criterion;
3
4 import org.hibernate.Criteria;
5 import org.hibernate.HibernateException;
6 import org.hibernate.type.Type;
7 import org.hibernate.util.StringHelper;
8
9
13 public class IdentifierProjection extends SimpleProjection {
14
15 private boolean grouped;
16
17 protected IdentifierProjection(boolean grouped) {
18 this.grouped = grouped;
19 }
20
21 protected IdentifierProjection() {
22 this(false);
23 }
24
25 public String  toString() {
26 return "id";
27 }
28
29 public Type[] getTypes(Criteria criteria, CriteriaQuery criteriaQuery)
30 throws HibernateException {
31 return new Type[] { criteriaQuery.getIdentifierType(criteria) };
32 }
33
34 public String toSqlString(Criteria criteria, int position, CriteriaQuery criteriaQuery)
35 throws HibernateException {
36 StringBuffer buf = new StringBuffer ();
37 String [] cols = criteriaQuery.getIdentifierColumns(criteria);
38 for ( int i=0; i<cols.length; i++ ) {
39 buf.append( cols[i] )
40 .append(" as y")
41 .append(position + i)
42 .append('_');
43 }
44 return buf.toString();
45 }
46
47 public boolean isGrouped() {
48 return grouped;
49 }
50
51 public String toGroupSqlString(Criteria criteria, CriteriaQuery criteriaQuery)
52 throws HibernateException {
53 if (!grouped) {
54 return super.toGroupSqlString(criteria, criteriaQuery);
55 }
56 else {
57 return StringHelper.join( ", ", criteriaQuery.getIdentifierColumns(criteria) );
58 }
59 }
60
61 }
62 |
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