com.instantbank.common.utilcomponents
Class DAOUtil

java.lang.Object
  |
  +--com.instantbank.common.utilcomponents.DAOUtil

public final class DAOUtil

extends java.lang.Object

This utility class for EJB tier components.

Author:

Instant-bank (Consuelo Franky)

Constructor Summary

DAOUtil()

Method Summary

static void	closeCallableStatement(java.sql.CallableStatement cstmt) Close a CallableStatement
static void	closeConnection(java.sql.Connection dbConnection) Close database connection associated to dbConnection attribute
static void	closePreparedStatement(java.sql.PreparedStatement stmt) Close a PreparedStatement statement
static void	closeResultSet(java.sql.ResultSet result) Close a resultSet
static void	closeStatement(java.sql.Statement stmt) Close a statement
static byte[]	getBlobImage(java.sql.Blob blobRef, byte[] imageArray) Get BLOB image from DB
static java.sql.Blob	getBlobReference(java.sql.PreparedStatement ps, java.sql.ResultSet rs) Obtain reference to BLOB field in the DB
static java.lang.String	getBlobText(java.sql.Blob blobRef, byte[] textArray) Get BLOB text from DB
static javax.sql.DataSource	getDataSource(java.lang.String dsName) Get the DataSource associated to a JNDIName
static java.sql.Connection	getDBConnection(javax.sql.DataSource datasource) Get a database connection
static java.lang.String	getUserId(javax.ejb.SessionContext context) get the current user from the context
static int	inputStreamTobyte(java.io.InputStream is, byte[] array, byte[] buf) Get byte[] from InputStream
static boolean	isUserInRole(javax.ejb.SessionContext context, java.lang.String rol) determine if the current user belongs to a role
static CodeDescription[]	loadCodeDescription(java.sql.PreparedStatement ps, java.sql.ResultSet rs) Auxiliary for load a CodeDescription[] from DB
static void	showByteArray(byte[] array) Debug: Shows first and last bytes of a byte[]
static void	writeBlobData(java.sql.Blob blobRef, java.io.InputStream is) Write BLOB data on the DB

Methods inherited from class java.lang.Object

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

Constructor Detail

DAOUtil

public DAOUtil()

Method Detail

getUserId

public static java.lang.String getUserId(javax.ejb.SessionContext context)
                                  throws java.lang.Exception

get the current user from the context

Parameters:

context - is the context

Returns:

The userId value

Throws:

java.lang.Exception -

isUserInRole

public static boolean isUserInRole(javax.ejb.SessionContext context,
                                   java.lang.String rol)
                            throws java.lang.Exception

determine if the current user belongs to a role

Parameters:

context - is the context

rol - role of sistem

Returns:

The userInRole value

Throws:

java.lang.Exception -

getDataSource

public static javax.sql.DataSource getDataSource(java.lang.String dsName)
                                          throws DAOException

Get the DataSource associated to a JNDIName

Parameters:

dsName - Description of the Parameter

Returns:

The dataSource value

Throws:

DAOException -

getDBConnection

public static java.sql.Connection getDBConnection(javax.sql.DataSource datasource)
                                           throws DAOException

Get a database connection

Parameters:

datasource - Description of the Parameter

Returns:

The dBConnection value

Throws:

DAOException -

closeConnection

public static void closeConnection(java.sql.Connection dbConnection)
                            throws DAOException

Close database connection associated to dbConnection attribute

Parameters:

dbConnection - Description of the Parameter

Throws:

DAOException -

closeResultSet

public static void closeResultSet(java.sql.ResultSet result)
                           throws DAOException

Close a resultSet

Parameters:

result - is the ResultSet to close

Throws:

DAOException -

closeStatement

public static void closeStatement(java.sql.Statement stmt)
                           throws DAOException

Close a statement

Parameters:

stmt - is the Statement to close

Throws:

DAOException -

closePreparedStatement

public static void closePreparedStatement(java.sql.PreparedStatement stmt)
                                   throws DAOException

Close a PreparedStatement statement

Parameters:

stmt - is the PreparedStatement to close

Throws:

DAOException -

closeCallableStatement

public static void closeCallableStatement(java.sql.CallableStatement cstmt)
                                   throws DAOException

Close a CallableStatement

Parameters:

cstmt - is the PreparedStatement to close

Throws:

DAOException -

loadCodeDescription

public static CodeDescription[] loadCodeDescription(java.sql.PreparedStatement ps,
                                                    java.sql.ResultSet rs)
                                             throws java.lang.Exception

Auxiliary for load a CodeDescription[] from DB

Parameters:

ps - auxiliary PreparedStatement

rs - auxiliary ResultSet

Returns:

CodeDescription[]

Throws:

java.lang.Exception -

getBlobReference

public static java.sql.Blob getBlobReference(java.sql.PreparedStatement ps,
                                             java.sql.ResultSet rs)
                                      throws java.lang.Exception

Obtain reference to BLOB field in the DB

Parameters:

ps - auxiliary PreparedStatement

rs - auxiliary ResultSet

Returns:

Blob reference to a Blob field

Throws:

java.lang.Exception -

writeBlobData

public static void writeBlobData(java.sql.Blob blobRef,
                                 java.io.InputStream is)
                          throws java.lang.Exception

Write BLOB data on the DB

Parameters:

blobRef - reference to a Blob field

is - data (InputStream) to write in the Blob field

Throws:

java.lang.Exception -

getBlobText

public static java.lang.String getBlobText(java.sql.Blob blobRef,
                                           byte[] textArray)
                                    throws java.lang.Exception

Get BLOB text from DB

Parameters:

blobRef - reference to a Blob text field

textArray - is an auxiliary byte[] to receive the text from the Blob field

Returns:

String is the gotten text

Throws:

java.lang.Exception -

getBlobImage

public static byte[] getBlobImage(java.sql.Blob blobRef,
                                  byte[] imageArray)
                           throws java.lang.Exception

Get BLOB image from DB

Parameters:

blobRef - reference to a Blob text field

imageArray - is an auxiliary byte[] to receive the image from the Blob field

Returns:

byte[] bytes of image

Throws:

java.lang.Exception -

inputStreamTobyte

public static int inputStreamTobyte(java.io.InputStream is,
                                    byte[] array,
                                    byte[] buf)

Get byte[] from InputStream

Parameters:

is - InputStream

array - byte[] for storing all the bytes of is

buf - auxiliary byte[] for reading from is

Returns:

number of bytes of is (int)

showByteArray

public static void showByteArray(byte[] array)

Debug: Shows first and last bytes of a byte[]

Parameters:

array - array of bytes