org.pentaho.reporting.engine.classic.core
Interface DataRow

All Known Implementing Classes:

CompoundDataRow, DataRowConnector, FastGlobalView, ImportedVariablesDataRow, ParameterDataRow, QueryDataRowWrapper, ReportEnvironmentDataRow, ReportParameterValues, StaticDataRow, StaticDataRow

public interface DataRow

The datarow is used to access the current row in the TableModel, Expressions and Functions using a generic interface.

The Engine assumes, that the tablemodels given for reporting are immutable and do not change during the report processing.

Author:

Thomas Morgner

See Also:

Expression, Function, TableModel

Method Summary

Object	get(String col) Returns the value of the function, expression or column using its specific name.
String[]	getColumnNames() Returns the known column names, this data-row understands.
boolean	isChanged(String name) Checks whether the value contained in the column has changed since the last advance-operation.

Method Detail

get

Object get(String col)

Returns the value of the function, expression or column using its specific name. The given name is translated into a valid column number and the the column is queried. For functions and expressions, the getValue() method is called and for columns from the tablemodel the tablemodel method getValueAt(row, column) gets called.

Parameters:

col - the item index.

Returns:

the value.

getColumnNames

String[] getColumnNames()

Returns the known column names, this data-row understands. The column names may change over time but do not change while a event is processed by a function. The array returned is a copy of the internal data-storage and can be safely modified.

Returns:

the column names as array.

isChanged

boolean isChanged(String name)

Checks whether the value contained in the column has changed since the last advance-operation.

Parameters:

name - the name of the column.

Returns:

true, if the value has changed, false otherwise.