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AliasToBeanResultTransformer.javaAPI DocHibernate 3.2.52438Sat Feb 12 00:19:50 GMT 2005org.hibernate.transform

AliasToBeanResultTransformer

public class AliasToBeanResultTransformer extends Object implements ResultTransformer
Result transformer that allows to transform a result to a user specified class which will be populated via setter methods or fields matching the alias names. 
List resultWithAliasedBean = s.createCriteria(Enrolment.class)
.createAlias("student", "st")
.createAlias("course", "co")
.setProjection( Projections.projectionList()
.add( Projections.property("co.description"), "courseDescription" )
)
.setResultTransformer( new AliasToBeanResultTransformer(StudentDTO.class) )
.list();

StudentDTO dto = (StudentDTO)resultWithAliasedBean.get(0);
author
max

Fields Summary
private final Class
resultClass
private org.hibernate.property.Setter[]
setters
private org.hibernate.property.PropertyAccessor
propertyAccessor
Constructors Summary
public AliasToBeanResultTransformer(Class resultClass)

		if(resultClass==null) throw new IllegalArgumentException("resultClass cannot be null");
		this.resultClass = resultClass;
		propertyAccessor = new ChainedPropertyAccessor(new PropertyAccessor[] { PropertyAccessorFactory.getPropertyAccessor(resultClass,null), PropertyAccessorFactory.getPropertyAccessor("field")});
Methods Summary
public java.util.ListtransformList(java.util.List collection)

		return collection;
public java.lang.ObjecttransformTuple(java.lang.Object[] tuple, java.lang.String[] aliases)

		Object result;
		
		try {
			if(setters==null) {
				setters = new Setter[aliases.length];
				for (int i = 0; i < aliases.length; i++) {
					String alias = aliases[i];
					if(alias != null) {
						setters[i] = propertyAccessor.getSetter(resultClass, alias);
					}
				}
			}
			result = resultClass.newInstance();
			
			for (int i = 0; i < aliases.length; i++) {
				if(setters[i]!=null) {
					setters[i].set(result, tuple[i], null);
				}
			}
		} catch (InstantiationException e) {
			throw new HibernateException("Could not instantiate resultclass: " + resultClass.getName());
		} catch (IllegalAccessException e) {
			throw new HibernateException("Could not instantiate resultclass: " + resultClass.getName());
		}
		
		return result;