org.gcube.vremanagement.softwarerepository.db
Class SQLDBManager

java.lang.Object
  org.gcube.vremanagement.softwarerepository.db.SQLDBManager

public class SQLDBManager
extends java.lang.Object

This class is used for submitting query on db.

Author:

Luca Frosini (ISTI-CNR)

Nested Class Summary

static interface

SQLDBManager.BaseConsumer Describe the Consumer of ResultSet returned quering the db

Constructor Summary

SQLDBManager()
Constructor for SQLDBManager

SQLDBManager(java.lang.String dbFileName, java.lang.String username, java.lang.String password, java.io.File queriesFile)
Constructor for SQLDBManager

Method Summary

void	close() Shutdown the db and close the connection to the db.
void	open() Load the HSQL Database Engine JDBC driver and open the connection to the db.
void	queryAndConsume(java.lang.String expression, SQLDBManager.BaseConsumer consumer) Executes SQL command SELECT and invokes the given consumer.
void	runSQLQuery(java.lang.String expression) Executes SQL commands CREATE, DROP, INSERT and UPDATE.
java.sql.ResultSet	runSQLSelect(java.lang.String expression) Executes SQL command SELECT and invokes the given consumer.

Methods inherited from class java.lang.Object

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

Constructor Detail

SQLDBManager

public SQLDBManager()

Constructor for SQLDBManager

SQLDBManager

public SQLDBManager(java.lang.String dbFileName,
                    java.lang.String username,
                    java.lang.String password,
                    java.io.File queriesFile)

Constructor for SQLDBManager

Parameters:

dbFileName - file name of the db

username - username

password - password

queriesFile - query file for db initialization

Method Detail

open

public void open()
          throws java.lang.ClassNotFoundException,
                 java.sql.SQLException,
                 java.lang.Exception

Load the HSQL Database Engine JDBC driver and open the connection to the db.

Throws:

java.lang.ClassNotFoundException - if the HSQL Database Engine JDBC driver is not loaded

java.sql.SQLException - if the connection to the db fails

java.lang.Exception - if the tables creation fails

close

public void close()
           throws java.sql.SQLException

Shutdown the db and close the connection to the db.

Throws:

java.sql.SQLException - if the SHUTDOWN query fails

queryAndConsume

public void queryAndConsume(java.lang.String expression,
                            SQLDBManager.BaseConsumer consumer)
                     throws java.sql.SQLException,
                            java.lang.Exception

Executes SQL command SELECT and invokes the given consumer.

Parameters:

expression - the SQL expression to evaluate

consumer - the resultset consumer to invoke

Throws:

java.sql.SQLException - if the query fails

java.lang.Exception - if the given resultset consumer fails

runSQLSelect

public java.sql.ResultSet runSQLSelect(java.lang.String expression)
                                throws java.sql.SQLException,
                                       java.lang.Exception

Executes SQL command SELECT and invokes the given consumer.

Parameters:

expression - the SQL expression to evaluate

Returns:

Result Set

Throws:

java.sql.SQLException - if the query fails

java.lang.Exception - if the given resultset consumer fails

runSQLQuery

public void runSQLQuery(java.lang.String expression)
                 throws java.sql.SQLException

Executes SQL commands CREATE, DROP, INSERT and UPDATE.

Parameters:

expression - the SQL expression to modify the db

Throws:

java.sql.SQLException - if the query fails