net.sf.shineframework.server.dal.dao.impl
Class DaoInvocationHandler

java.lang.Object
  net.sf.shineframework.server.dal.dao.impl.DaoInvocationHandler

All Implemented Interfaces:

java.lang.reflect.InvocationHandler

public class DaoInvocationHandler
extends java.lang.Object
implements java.lang.reflect.InvocationHandler

Constructor Summary

DaoInvocationHandler(java.lang.Object daoEngine, java.lang.Class<? extends DalObject> managedClass)

Method Summary

java.lang.Object

invoke(java.lang.Object proxy, java.lang.reflect.Method method, java.lang.Object[] args) The virtual method that implements all non-concrete methods.

Methods inherited from class java.lang.Object

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

Constructor Detail

DaoInvocationHandler

public DaoInvocationHandler(java.lang.Object daoEngine,
                            java.lang.Class<? extends DalObject> managedClass)

Method Detail

invoke

public java.lang.Object invoke(java.lang.Object proxy,
                               java.lang.reflect.Method method,
                               java.lang.Object[] args)
                        throws java.lang.Throwable

The virtual method that implements all non-concrete methods. If the requested method exist in the internal dao engine, then this method is used. Otherwise an attempt is made to "guess" the query to run. The guessing mechanism works as follows:

• if a named query exist in the format: ClassShortName.PropertyName, for example: Employee.ByMinSalary - this named query is invoked
• otherwise the query is assumed to be a property-based query, the name of the query is broken down into a property name, if this property is available in the managed class, then a simple query of the following form is invoked:
  from ManagedClass as mc where mc.thePropery=?
  The argument is then bound to the single argument accepted by the original get method.
• if no other gussing mechanism works then an UnsupportedOperationException is thrown

Specified by:

invoke in interface java.lang.reflect.InvocationHandler

Throws:

java.lang.UnsupportedOperationException - when the operation cannot be implemented at runtime

java.lang.Throwable