org.jfree.report.data

Class ExpressionDataRow

java.lang.Object

org.jfree.report.data.ExpressionDataRow

All Implemented Interfaces:

DataRow, DataSet

public final class ExpressionDataRow
extends java.lang.Object
implements DataRow

A datarow for all expressions encountered in the report. This datarow is a stack-like structure, which allows easy adding and removing of expressions, even if these expressions have been cloned and or otherwisely modified.

Author:

Thomas Morgner

Constructor Summary

Constructors

Constructor and Description
ExpressionDataRow(GlobalMasterRow masterRow, ReportContext reportContext, int capacity)

Method Summary

Modifier and Type	Method and Description
ExpressionDataRow	advance(GlobalMasterRow master, boolean deepTraversing) Advances to the next row and attaches the given master row to the objects contained in that client data row.
ExpressionDataRow	derive(GlobalMasterRow master)
java.lang.Object	get(int col) Returns the value of the expressions or column in the tablemodel using the given column number as index.
java.lang.Object	get(java.lang.String col) Returns the value of the function, expressions or column using its specific name.
int	getColumnCount() Returns the number of columns, expressions and functions and marked ReportProperties in the report.
java.lang.String	getColumnName(int col) Returns the name of the column, expressions or function.
DataFlags	getFlags(int col) Queries lowlevel meta-data for the current value of the specified column.
DataFlags	getFlags(java.lang.String col) Queries lowlevel meta-data for the current value of the specified column.
ExpressionSlot[]	getSlots()
void	popExpression()
void	popExpressions(int counter)
void	pushExpression(ExpressionSlot expressionSlot) This adds the expression to the data-row and queries the expression for the first time.
void	pushExpressions(ExpressionSlot[] expressionSlots)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionDataRow

public ExpressionDataRow(GlobalMasterRow masterRow,
                         ReportContext reportContext,
                         int capacity)

Method Detail

pushExpression

public void pushExpression(ExpressionSlot expressionSlot)
                    throws DataSourceException

This adds the expression to the data-row and queries the expression for the first time.

Parameters:

ex -

rd -

Throws:

DataSourceException

pushExpressions

public void pushExpressions(ExpressionSlot[] expressionSlots)
                     throws DataSourceException

Throws:

DataSourceException

popExpressions

public void popExpressions(int counter)
                    throws DataSourceException

Throws:

DataSourceException

popExpression

public void popExpression()
                   throws DataSourceException

Throws:

DataSourceException

get

public java.lang.Object get(int col)
                     throws DataSourceException

Returns the value of the expressions or column in the tablemodel using the given column number as index. 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

Specified by:

get in interface DataSet

Parameters:

col - the item index.

Returns:

the value.

Throws:

java.lang.IllegalStateException - if the datarow detected a deadlock.

DataSourceException - if an error occured.

get

public java.lang.Object get(java.lang.String col)
                     throws DataSourceException

Returns the value of the function, expressions 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.

Throws:

java.lang.IllegalStateException - if the datarow detected a deadlock.

DataSourceException - if an error occured.

getColumnName

public java.lang.String getColumnName(int col)

Returns the name of the column, expressions or function. For columns from the tablemodel, the tablemodels getColumnName method is called. For functions, expressions and report properties the assigned name is returned.

Specified by:

getColumnName in interface DataRow

Specified by:

getColumnName in interface DataSet

Parameters:

col - the item index.

Returns:

the name.

getColumnCount

public int getColumnCount()

Returns the number of columns, expressions and functions and marked ReportProperties in the report.

Specified by:

getColumnCount in interface DataRow

Specified by:

getColumnCount in interface DataSet

Returns:

the item count.

getFlags

public DataFlags getFlags(java.lang.String col)

Description copied from interface: DataRow

Queries lowlevel meta-data for the current value of the specified column.

Specified by:

getFlags in interface DataRow

Parameters:

col - the colum for which to query the meta-data flags

Returns:

the dataflag collection for the value in the named column

getFlags

public DataFlags getFlags(int col)

Description copied from interface: DataRow

Queries lowlevel meta-data for the current value of the specified column.

Specified by:

getFlags in interface DataRow

Parameters:

col - the colum for which to query the meta-data flags

Returns:

the dataflag collection for the value in the specified column

advance

public ExpressionDataRow advance(GlobalMasterRow master,
                                 boolean deepTraversing)
                          throws DataSourceException

Advances to the next row and attaches the given master row to the objects contained in that client data row.

Parameters:

master -

deepTraversing - only advance expressions that have been marked as deeply traversing

Returns:

Throws:

DataSourceException

derive

public ExpressionDataRow derive(GlobalMasterRow master)
                         throws DataSourceException

Throws:

DataSourceException

getSlots

public ExpressionSlot[] getSlots()