org.pentaho.reporting.engine.classic.core.states
Class QueryDataRowWrapper

java.lang.Object
  org.pentaho.reporting.engine.classic.core.states.QueryDataRowWrapper

All Implemented Interfaces:

DataRow

public class QueryDataRowWrapper
extends Object
implements DataRow

A data-row wrapper that adds a new artificial parameter to the original datarow that holds the query-limit.

Author:

Thomas Morgner

Constructor Summary

QueryDataRowWrapper(DataRow backend, Integer queryTimeout, Integer queryLimit)

QueryDataRowWrapper(DataRow backend, int queryLimit, int queryTimeout)

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.

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryDataRowWrapper

public QueryDataRowWrapper(DataRow backend,
                           Integer queryTimeout,
                           Integer queryLimit)

QueryDataRowWrapper

public QueryDataRowWrapper(DataRow backend,
                           int queryLimit,
                           int queryTimeout)

Method Detail

get

public 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.

Specified by:

get in interface DataRow

Parameters:

col - the item index.

Returns:

the value.

getColumnNames

public String[] getColumnNames()

Description copied from interface: DataRow

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.

Specified by:

getColumnNames in interface DataRow

Returns:

the column names as array.

isChanged

public boolean isChanged(String name)

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

Specified by:

isChanged in interface DataRow

Parameters:

name - the name of the column.

Returns:

true, if the value has changed, false otherwise.