com.gridsystems.storage
Interface DAO<T>

Type Parameters:

T - Class to store/load.

public interface DAO<T>

Data Access Object.

Version:

1.0

Author:

Rodrigo Ruiz Aguayo, Xmas (Generics)

Method Summary

java.lang.String[]	getFileNames(java.util.Map<java.lang.String,java.lang.String> initData) Gets the list of file names from where to load an object from the specified Map.
java.lang.String[]	getFileNames(T obj) Gets the list of file names where an object must be stored, from the object itself.
T	load(java.lang.String[] fileNames) Loads an object from the speficied file list.
void	store(java.lang.String[] fileNames, T obj) Stores an object in the specified file list.

Method Detail

load

T load(java.lang.String[] fileNames)
       throws java.lang.Exception

Loads an object from the speficied file list.

Parameters:

fileNames - The names of the files where the object data is stored

Returns:

The loaded object instance

Throws:

java.lang.Exception - in case of error

store

void store(java.lang.String[] fileNames,
           T obj)
           throws java.lang.Exception

Stores an object in the specified file list.

Parameters:

fileNames - The names of the files where the object data must be stored

obj - The object to store

Throws:

java.lang.Exception - In case of error

getFileNames

java.lang.String[] getFileNames(java.util.Map<java.lang.String,java.lang.String> initData)

Gets the list of file names from where to load an object from the specified Map.

Parameters:

initData - A map containing data that can be used to find out the file names from where to load an object

Returns:

The list of file names

getFileNames

java.lang.String[] getFileNames(T obj)

Gets the list of file names where an object must be stored, from the object itself.

It can also be used to obtain the list of files to delete on object removal.

Parameters:

obj - The object to store

Returns:

The list of file names