org.jfree.report.data

Class ExpressionDataRow

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

ExpressionDataRow(GlobalMasterRow masterRow, ReportContext reportContext, int capacity)

Method Summary

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)
Object
get(String col)
Returns the value of the function, expressions or column using its specific name.
Object
get(int col)
Returns the value of the expressions or column in the tablemodel using the given column number as index.
int
getColumnCount()
Returns the number of columns, expressions and functions and marked ReportProperties in the report.
String
getColumnName(int col)
Returns the name of the column, expressions or function.
DataFlags
getFlags(String col)
Queries lowlevel meta-data for the current value of the specified column.
DataFlags
getFlags(int 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)

Constructor Details

ExpressionDataRow

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

Method Details

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:

derive

public ExpressionDataRow derive(GlobalMasterRow master)
            throws DataSourceException

get

public Object get(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.

get

public 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
get in interface DataSet
Parameters:
col - the item index.
Returns:
the value.

getColumnCount

public int getColumnCount()
Returns the number of columns, expressions and functions and marked ReportProperties in the report.
Specified by:
getColumnCount in interface DataRow
getColumnCount in interface DataSet
Returns:
the item count.

getColumnName

public 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
getColumnName in interface DataSet
Parameters:
col - the item index.
Returns:
the name.

getFlags

public DataFlags getFlags(String col)
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)
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

getSlots

public ExpressionSlot[] getSlots()

popExpression

public void popExpression()
            throws DataSourceException

popExpressions

public void popExpressions(int counter)
            throws DataSourceException

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:

pushExpressions

public void pushExpressions(ExpressionSlot[] expressionSlots)
            throws DataSourceException