com.googlecode.genericdao.dao
Class BaseDAODispatcher

java.lang.Object
  com.googlecode.genericdao.dao.BaseDAODispatcher

Direct Known Subclasses:

DAODispatcher

public class BaseDAODispatcher
extends Object

This class has some helpful properties and methods for use in making DAODispatchers for various DAO implementations.

Author:

dwolverton

Field Summary

protected Map<String,Object>

specificDAOs

Constructor Summary

BaseDAODispatcher()

Method Summary

protected Object	callMethod(Object specificDAO, String methodName, Class<?>[] paramTypes, Object... args)
protected Object	callMethod(Object specificDAO, String methodName, Object... args)
protected Object	getSpecificDAO(String className)
protected static Class<?>	getTypeFromArray(Object[] array) Get the type of an array's elements.
protected static Class<?>	getUniformArrayType(Object[] array) If array is null, empty or has no non-null elements, return null If array contains all elements of the same type, return that type If array contains several different element types, return Object.class
void	setSpecificDAOs(Map<String,Object> specificDAOs) In practice some DAOs could be put into this map using Spring.

Methods inherited from class java.lang.Object

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

Field Detail

specificDAOs

protected Map<String,Object> specificDAOs

Constructor Detail

BaseDAODispatcher

public BaseDAODispatcher()

Method Detail

setSpecificDAOs

public void setSpecificDAOs(Map<String,Object> specificDAOs)

In practice some DAOs could be put into this map using Spring. If a DAO is in this map, it will be used instead of the general DAO. This provides a way to override the default implementation for objects with special considerations.

getSpecificDAO

protected Object getSpecificDAO(String className)

callMethod

protected Object callMethod(Object specificDAO,
                            String methodName,
                            Object... args)

callMethod

protected Object callMethod(Object specificDAO,
                            String methodName,
                            Class<?>[] paramTypes,
                            Object... args)

getTypeFromArray

protected static Class<?> getTypeFromArray(Object[] array)

Get the type of an array's elements. If the type of the array is more specific than "Object", the array type will be returned. Otherwise the most general of the types of the elements will be returned.

getUniformArrayType

protected static Class<?> getUniformArrayType(Object[] array)

• If array is null, empty or has no non-null elements, return null
• If array contains all elements of the same type, return that type
• If array contains several different element types, return Object.class