com.klg.jclass.datasource
Interface VirtualColumnModel

All Superinterfaces:

ColumnModel

All Known Implementing Classes:

BaseVirtualColumn

public interface VirtualColumnModel

extends ColumnModel

This is the interface for derived columns which can be added to DataSource. DataSource will call this interface's single method to determine what value to show in this cell.

Method Summary

Object

getResultData(com.klg.jclass.datasource.DataTableModel dtm, long bookmark) Return the value to be displayed in the cell

Methods inherited from interface com.klg.jclass.datasource.ColumnModel

getCatalogName, getColumnClassName, getColumnDisplaySize, getColumnLabel, getColumnName, getColumnType, getColumnTypeName, getIdentifier, getMetaColumnType, getPrecision, getScale, getSchemaName, getTableName, isAutoIncrement, isCaseSensitive, isCurrency, isDefinitelyWritable, isNullable, isReadOnly, isSearchable, isSigned, isTimeDate, isWritable, setAutoIncrement, setCaseSensitive, setCatalogName, setColumnClassName, setColumnDisplaySize, setColumnLabel, setColumnName, setColumnType, setColumnTypeName, setCurrency, setDefinitelyWritable, setIdentifier, setMetaColumnType, setMetaColumnTypeFromSqlType, setNullable, setPrecision, setReadOnly, setScale, setSchemaName, setSearchable, setSigned, setTableName, setWritable

Method Detail

getResultData

public Object getResultData(com.klg.jclass.datasource.DataTableModel dtm,
                            long bookmark)
                     throws DataModelException

Return the value to be displayed in the cell

Parameters:

bookmark - a unique long representing a row

Returns:

an Object which is the calculated value.

Throws:

DataModelException - If getResultData fails.