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1 package org.hibernate.hql;
3
4 import java.lang.reflect.Constructor  ;
5 import java.util.Arrays ;
6 import java.util.HashMap ;
7 import java.util.Map ;
8
9 import org.hibernate.QueryException;
10
11
14 public final class HolderInstantiator {
15
16
18 private final Constructor constructor;
19 private final boolean returnMaps;
20 private final boolean returnLists;
21 private final String [] queryReturnAliases;
22
23 public HolderInstantiator(
24 Constructor constructor,
25 boolean returnMaps,
26 boolean returnLists,
27 String [] queryReturnAliases
28 ) {
29 this.constructor = constructor;
30 this.returnLists = returnLists;
31 this.returnMaps = returnMaps;
32 this.queryReturnAliases = queryReturnAliases;
33 }
34
35 public boolean isRequired() {
36 return constructor!=null || returnLists || returnMaps;
37 }
38
39 public Object instantiate(Object [] row) {
40 if ( constructor != null ) {
41 try {
42 return constructor.newInstance( row );
43 }
44 catch ( Exception e ) {
45 throw new QueryException(
46 "could not instantiate: " +
47 constructor.getDeclaringClass().getName(),
48 e );
49 }
50 }
51 else if ( returnMaps ) {
52 Map map = new HashMap ();
53 for ( int j = 0; j < row.length; j++ ) {
54 map.put( queryReturnAliases[j], row[j] );
55 }
56 return map;
57 }
58 else if ( returnLists ) {
59 return Arrays.asList(row);
60 }
61 else {
62 return row;
63 }
64 }
65
66 }
67 |
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