org.gcube.portlets.user.tdw.server.datasource.jdbc
Class JDBCDataSource

java.lang.Object
  org.gcube.portlets.user.tdw.server.datasource.jdbc.JDBCDataSource

All Implemented Interfaces:

DataSource

public class JDBCDataSource
extends Object
implements DataSource

Author:

"Federico De Faveri defaveri@isti.cnr.it"

Field Summary

protected ColumnDefinition	autogeneratePrimaryColumn
protected Connection	connection
protected String	dataSourceFactoryId
protected SQLDialect	dialect
static String	JSON_OFFSET_FIELD
static String	JSON_ROWS_FIELD
static String	JSON_TOTAL_LENGTH_FIELD
protected TableJSonBuilder	jsonBuilder
protected org.apache.log4j.Logger	logger
protected Map<String,PreparedStatement>	preparedStatementCache
protected TableDefinition	tableDefinition
protected String	tableName
protected int	tableSize

Constructor Summary

JDBCDataSource(String dataSourceFactoryId, Connection connection, String tableName)

JDBCDataSource(String dataSourceFactoryId, String jdbcConnectionUrl, String tableName)

Method Summary

protected int	calculateTableSize()
void	close() Close this DataSource releasing all the allocated resources.
protected ColumnDefinition	createPrimaryKeyColumn(List<ColumnDefinition> columns)
protected TableDefinition	extractTableDefinition()
protected TableJSonBuilder	getBuilder()
protected ColumnDefinition	getColumnDefinition(ResultSet columns)
protected List<ColumnDefinition>	getColumnDefinitions()
String	getDataAsJSon(int start, int limit, String sortingColumn, Direction direction) Retrieves the table data as JSON object.
String	getDataSourceFactoryId() Returns the id of the DataSourceFactory that have generated it.
protected String	getJSon(ResultSet resultSet, int start)
protected PreparedStatement	getPreparedStatement(String sortingColumn, Direction sortingDirection, int start, int limit)
protected String	getPrimaryKey()
TableDefinition	getTableDefinition() Returns the table definition.
protected int	getTableSize()
protected ValueType	getValueType(int sqlType)

Methods inherited from class java.lang.Object

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

Field Detail

JSON_ROWS_FIELD

public static final String JSON_ROWS_FIELD

See Also:

Constant Field Values

JSON_TOTAL_LENGTH_FIELD

public static final String JSON_TOTAL_LENGTH_FIELD

See Also:

Constant Field Values

JSON_OFFSET_FIELD

public static final String JSON_OFFSET_FIELD

See Also:

Constant Field Values

logger

protected org.apache.log4j.Logger logger

dataSourceFactoryId

protected String dataSourceFactoryId

connection

protected Connection connection

dialect

protected SQLDialect dialect

tableName

protected String tableName

tableDefinition

protected TableDefinition tableDefinition

tableSize

protected int tableSize

preparedStatementCache

protected Map<String,PreparedStatement> preparedStatementCache

autogeneratePrimaryColumn

protected ColumnDefinition autogeneratePrimaryColumn

jsonBuilder

protected TableJSonBuilder jsonBuilder

Constructor Detail

JDBCDataSource

public JDBCDataSource(String dataSourceFactoryId,
                      Connection connection,
                      String tableName)
               throws DataSourceException

Throws:

DataSourceException

JDBCDataSource

public JDBCDataSource(String dataSourceFactoryId,
                      String jdbcConnectionUrl,
                      String tableName)
               throws DataSourceException

Throws:

DataSourceException

Method Detail

getDataSourceFactoryId

public String getDataSourceFactoryId()

Returns the id of the DataSourceFactory that have generated it.

Specified by:

getDataSourceFactoryId in interface DataSource

Returns:

the DataSourceFactory id.

close

public void close()
           throws DataSourceException

Close this DataSource releasing all the allocated resources.

Throws:

DataSourceException

getTableDefinition

public TableDefinition getTableDefinition()
                                   throws DataSourceException

Returns the table definition.

Specified by:

getTableDefinition in interface DataSource

Returns:

a table definition.

Throws:

DataSourceException - if an error occurred retrieving the table definition.

extractTableDefinition

protected TableDefinition extractTableDefinition()
                                          throws DataSourceException

Throws:

DataSourceException

getColumnDefinitions

protected List<ColumnDefinition> getColumnDefinitions()
                                               throws SQLException,
                                                      DataSourceException

Throws:

SQLException

DataSourceException

getColumnDefinition

protected ColumnDefinition getColumnDefinition(ResultSet columns)
                                        throws SQLException

Throws:

SQLException

getPrimaryKey

protected String getPrimaryKey()
                        throws SQLException,
                               DataSourceException

Throws:

SQLException

DataSourceException

createPrimaryKeyColumn

protected ColumnDefinition createPrimaryKeyColumn(List<ColumnDefinition> columns)

getValueType

protected ValueType getValueType(int sqlType)

getDataAsJSon

public String getDataAsJSon(int start,
                            int limit,
                            String sortingColumn,
                            Direction direction)
                     throws DataSourceException

Retrieves the table data as JSON object.

Specified by:

getDataAsJSon in interface DataSource

Parameters:

start - the starting row index.

limit - the number of rows after the starting index to retrieve.

sortingColumn - the column used for sorting.

direction - the sorting direction.

Returns:

the JSON object as String.

Throws:

DataSourceException - if an error occurred retrieving the table data.

getPreparedStatement

protected PreparedStatement getPreparedStatement(String sortingColumn,
                                                 Direction sortingDirection,
                                                 int start,
                                                 int limit)
                                          throws DataSourceException,
                                                 SQLException

Throws:

DataSourceException

SQLException

getJSon

protected String getJSon(ResultSet resultSet,
                         int start)
                  throws SQLException,
                         DataSourceException

Throws:

SQLException

DataSourceException

getBuilder

protected TableJSonBuilder getBuilder()
                               throws DataSourceException

Throws:

DataSourceException

getTableSize

protected int getTableSize()
                    throws DataSourceException

Throws:

DataSourceException

calculateTableSize

protected int calculateTableSize()
                          throws DataSourceException

Throws:

DataSourceException