|
||||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | |||||||||
This is the base interface for all data access collectors. A data-row adds a certain order to the elements in the dataset. It also allows statefull comparisions and data attributes using DataFlags.
The data-row is an internal concept of JFreeReport. The report engine will be responsible for creating and maintaining these implementations. Authors of functions and expressions usually dont have to care where a datarow comes from or at which particular instance they are looking right now. Note: Do not attempt to cache the datarow outside the core engine. This can have funny sideeffects and might trigger the end of the world.
| Method Summary | |
java.lang.Object |
get(int col)
Returns the value of the expression 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, expression 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, expression 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. |
| Method Detail |
public java.lang.Object get(int col)
throws DataSourceException
getValue() method is called and for columns from the
tablemodel the tablemodel method getValueAt(row, column) gets
called.
get in interface DataSetcol - the item index.
java.lang.IllegalStateException - if the datarow detected a deadlock.
DataSourceException - if an error occured.
public java.lang.Object get(java.lang.String col)
throws DataSourceException
getValue() method is called and for columns from the
tablemodel the tablemodel method getValueAt(row, column) gets
called.
col - the item index.
java.lang.IllegalStateException - if the datarow detected a deadlock.
DataSourceException - if an error occured.
public java.lang.String getColumnName(int col)
throws DataSourceException
getColumnName method is
called. For functions, expressions and report properties the assigned name
is returned.
getColumnName in interface DataSetcol - the item index.
DataSourceException - if an error occured.
public int getColumnCount()
throws DataSourceException
getColumnCount in interface DataSetDataSourceException - if an error occured.
public DataFlags getFlags(java.lang.String col)
throws DataSourceException
col - the colum for which to query the meta-data flags
DataSourceException - if an error occured.
public DataFlags getFlags(int col)
throws DataSourceException
col - the colum for which to query the meta-data flags
DataSourceException - if an error occured.
|
||||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | |||||||||