maito.resource
Class ResourceLoader

java.lang.Object
  maito.resource.ResourceLoader

public class ResourceLoader
extends java.lang.Object

This class acts as a buffered stream for reading Resource objects from the database.

Author:

Antti Laitinen

Constructor Summary

ResourceLoader(java.sql.Connection con)

Method Summary

void	executeSQL(java.lang.String sql) Executes a query in the database.
Resource	nextResource() Fetches the next resource produced by the latest query.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResourceLoader

public ResourceLoader(java.sql.Connection con)

Method Detail

executeSQL

public void executeSQL(java.lang.String sql)
                throws java.sql.SQLException

Executes a query in the database. After this, the resources can be read using the method nextResource().

Parameters:

sql - The sql to be executed. It is executed as it is, so any validation on the query should be done outside this method.

Throws:

java.sql.SQLException - Thrown when the executed query produces an error.

nextResource

public Resource nextResource()
                      throws java.sql.SQLException

Fetches the next resource produced by the latest query.

Returns:

A Resource object representing the resource in the database. null if the query hasn't produced any resources or when all resources are read.

Throws:

java.sql.SQLException - Thrown if reading the database produces errors.