[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2991) Non public constructors cannot be used whith 'select new Object(...)' in HQL

Non public constructors cannot be used whith 'select new Object(...)' in HQL ---------------------------------------------------------------------------- Key: HHH-2991 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2991 Project: Hibernate3 Issue Type: Bug Components: query-hql Affects Versions: 3.2.5 Environment: Hibernate 3.2.5 Reporter: Jaime Porras Priority: Minor Attachments: ReflectHelper.java Original Estimate: 10 minutes Remaining Estimate: 10 minutes Using following HQL <query name="family"> <![CDATA[ select new Family(mother, mate, offspr) from DomesticCat as mother join mother.mate as mate left join mother.kittens as offspr ]]> </query> with public class Family { protected Family(String mother, String mate, String offspr) { // code } } Note: assuming Family constructor is correct (argument types are correct) During hql analyzing process, Hibernate produces the following error: SEVERE: Error in named query: family org.hibernate.hql.ast.QuerySyntaxException: Unable to locate appropriate constructor on class [Family] [ select new Family(mother, mate, offspr) from DomesticCat as mother join mother.mate as mate left join mother.kittens as offspr ] This error is produced because Family constructor is protected (may be private). org.hibernate.util.ReflectHelper is the class used to find the appropriate constructor. But the code used to do it calls clazz.getConstructors(), getting only the public contructors: public static Constructor getConstructor(Class clazz, Type[] types) throws PropertyNotFoundException { final Constructor[] candidates = clazz.getDeclaredConstructors(); // Get all constructors (public and not public) for ( int i=0; i<candidates.length; i++ ) { final Constructor constructor = candidates[i]; final Class[] params = constructor.getParameterTypes(); if ( params.length==types.length ) { boolean found = true; for ( int j=0; j<params.length; j++ ) { final boolean ok = params[j].isAssignableFrom( types[j].getReturnedClass() ) || ( types[j] instanceof PrimitiveType && params[j] == ( (PrimitiveType) types[j] ).getPrimitiveClass() ); if (!ok) { found = false; break; } } if (found) { if ( !isPublic(clazz, constructor) ) constructor.setAccessible(true); return constructor; } } } throw new PropertyNotFoundException( "no appropriate constructor in class: " + clazz.getName() ); } The only thing to do is change the first line by: final Constructor[] candidates = clazz.getDeclaredConstructors(); PD: If only public constructors will be used the this code has no sense: if (found) { if ( !isPublic(clazz, constructor) ) constructor.setAccessible(true); return constructor; }