com.github.quintans.ezSQL.transformers

Class MapBeanTransformer<T>

java.lang.Object

com.github.quintans.ezSQL.transformers.MapBeanTransformer<T>

All Implemented Interfaces:

QueryMapper

public class MapBeanTransformer<T>
extends Object
implements QueryMapper

Constructor Summary

Constructors

Constructor and Description
MapBeanTransformer(Class<T> clazz, Driver driver)

Method Summary

Modifier and Type	Method and Description
void	apply(Object instance, String name, Object value)
Object	createFrom(Object parentInstance, String name) Method called to get domain instance (POJO) when calling the property() method.
boolean	map(ResultSetWrapper rsw, Object instance, List<MapColumn> mapColumns) collecting the data from the database and put in the domain instance.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MapBeanTransformer

public MapBeanTransformer(Class<T> clazz,
                          Driver driver)

Method Detail

createFrom

public Object createFrom(Object parentInstance,
                         String name)

Description copied from interface: QueryMapper

Method called to get domain instance (POJO) when calling the property() method. This method is only called when there is a need to create a new instance. If the parent instance is null, it means we are asking for the root object to be instantiated. Otherwise we are asking an instance of the type defined by the property defined in 'name' in the parent instance. Override this method to provide your own implementation for a different domain object. We defer the setting of the instance, by returning a lambda, because we may wish not to set the value. e.g: in an outer join, all related fields came as null, therefore it is a empty entity

Specified by:

createFrom in interface QueryMapper

Parameters:

parentInstance - parent instance

name - name of the parent property that we want to instantiate for

Returns:

lambda where we apply the the instance value to the parent instance

apply

public void apply(Object instance,
                  String name,
                  Object value)

Specified by:

apply in interface QueryMapper

map

public boolean map(ResultSetWrapper rsw,
                   Object instance,
                   List<MapColumn> mapColumns)

Description copied from interface: QueryMapper

collecting the data from the database and put in the domain instance. The value from a column is always put in an domain instance.

Specified by:

map in interface QueryMapper

Parameters:

rsw - resultset wrapper

instance - domain instance to return

mapColumns - column mapping info

Returns:

true if the instance was populated with data