org.gcube.dataaccess.databases.utils

Class DatabaseManagement

java.lang.Object

org.gcube.dataaccess.databases.utils.DatabaseManagement

public class DatabaseManagement
extends Object

Class that allows to manage a database offering several functionalities

Field Summary

Fields

Modifier and Type	Field and Description
static int	MYSQLDialect
static int	POSTGRESQLDialect

Constructor Summary

Constructors

Constructor and Description
DatabaseManagement(String configPath)

Method Summary

Methods

Modifier and Type	Method and Description
void	closeConnection()
org.hibernate.SessionFactory	createConnection(String cfgDir, String SourceFile)
org.hibernate.SessionFactory	createConnection(String DatabaseUserName, String DatabasePassword, String DatabaseDriver, String DatabaseDialect, String DatabaseURL, String DatabaseName)
String	getCreateTable(String tablename, String schemaName) Get the "Create Table" statement.
List<String>	getListColumnNamesTable()
HashMap<String,String>	getMapQueryResult()
HashMap<String,String>	getMapSampleTableResult()
long	getNumberOfRows(String tablename, String schemaName)
List<String>	getSchemas() Get the schema's name for the database Postgresql.
List<String>	getTables(String databaseName, String schemaName) Get the table's names for a database.
void	randomSampleOnTable(String tableName, String schemaName, String pathFile) Retrieve 100 rows of a table in a random manner.
void	sampleOnTable(String tableName, String schemaName, String pathFile) Retrieve the first 100 rows of a table.
String	smartCorrectionOnQuery(String OriginalQuery, int dialect)
void	smartSampleOnTable(String tableName, String schemaName, String pathFile) retrieve 100 rows of a table randomly that have the maximum number of columns not null
List<Object>	submitQuery(String query, Connection conn) method that allows to submit a query.

Methods inherited from class java.lang.Object

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

Field Detail

POSTGRESQLDialect

public static final int POSTGRESQLDialect

See Also:

Constant Field Values

MYSQLDialect

public static final int MYSQLDialect

See Also:

Constant Field Values

Constructor Detail

DatabaseManagement

public DatabaseManagement(String configPath)

Method Detail

createConnection

public org.hibernate.SessionFactory createConnection(String DatabaseUserName,
                                            String DatabasePassword,
                                            String DatabaseDriver,
                                            String DatabaseDialect,
                                            String DatabaseURL,
                                            String DatabaseName)
                                              throws IOException

Throws:

IOException

createConnection

public org.hibernate.SessionFactory createConnection(String cfgDir,
                                            String SourceFile)
                                              throws Exception

Throws:

Exception

closeConnection

public void closeConnection()

submitQuery

public List<Object> submitQuery(String query,
                       Connection conn)
                         throws Exception

method that allows to submit a query.

Parameters:

schemaName - : the schema's name of the database postgres. For database mysql this parameter is null.

Returns:

query result

Throws:

Exception

getTables

public List<String> getTables(String databaseName,
                     String schemaName)
                       throws Exception

Get the table's names for a database.

Parameters:

schemaName - : the schema's name of the database postgres. For database mysql this parameter is null.

Returns:

List listTables: a list tables' names.

Throws:

Exception

getSchemas

public List<String> getSchemas()
                        throws Exception

Get the schema's name for the database Postgresql.

Returns:

listSchemas: the list of the schemas' names

Throws:

Exception

getCreateTable

public String getCreateTable(String tablename,
                    String schemaName)
                      throws Exception

Get the "Create Table" statement.

Parameters:

schemaName - : the schema's name of the database postgres. For database mysql this parameter is null.

Returns:

String: the create statement .

Throws:

Exception

getNumberOfRows

public long getNumberOfRows(String tablename,
                   String schemaName)
                     throws Exception

Throws:

Exception

smartSampleOnTable

public void smartSampleOnTable(String tableName,
                      String schemaName,
                      String pathFile)
                        throws Exception

retrieve 100 rows of a table randomly that have the maximum number of columns not null

Parameters:

tableName - : the table's name

schemaName - : the schema's name of the database postgres. For database mysql this parameter is the database name.

Throws:

Exception

sampleOnTable

public void sampleOnTable(String tableName,
                 String schemaName,
                 String pathFile)
                   throws Exception

Retrieve the first 100 rows of a table.

Parameters:

tableName - : the table's name

schemaName - : the schema's name of the database postgres. For database mysql this parameter is the database name.

Throws:

Exception

randomSampleOnTable

public void randomSampleOnTable(String tableName,
                       String schemaName,
                       String pathFile)
                         throws Exception

Retrieve 100 rows of a table in a random manner.

Parameters:

tableName - : the table's name

schemaName - : the schema's name of the database postgres. For database mysql this parameter is the database name.

Throws:

Exception

getListColumnNamesTable

public List<String> getListColumnNamesTable()

getMapSampleTableResult

public HashMap<String,String> getMapSampleTableResult()

getMapQueryResult

public HashMap<String,String> getMapQueryResult()

smartCorrectionOnQuery

public String smartCorrectionOnQuery(String OriginalQuery,
                            int dialect)
                              throws com.adventnet.swissqlapi.sql.parser.ParseException,
                                     com.adventnet.swissqlapi.sql.exception.ConvertException

Throws:

com.adventnet.swissqlapi.sql.parser.ParseException

com.adventnet.swissqlapi.sql.exception.ConvertException