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| java.lang.Object
 org.jfree.report.filter.DataRowDataSource
| DataRowDataSource | | public class DataRowDataSource implements DataSource(Code) | | A DataSource that can access values from the 'data-row'. The data-row contains all values from the current row of the
report's TableModel, plus the current values of the defined expressions and functions for the report.
The DataRowDataSource can either query the data-row directly using the specified field name or it can evaluate a
given formula (which must be compatible to the OpenFormula specifications) to compute the value.
Fields and formulas are mutually exclusive; defining a field name autmatically undefines the formula and vice versa.
author:
Thomas Morgner
See Also: org.jfree.report.DataRow |
| Method Summary | |
| public Object | clone()
Clones the data source. | | public String | getDataSourceColumnName()
Returns the data source column name. | | public String | getFormula()
Returns the formula used to compute the value of the data source. | | public Object | getValue(ExpressionRuntime runtime)
Returns the current value of the data source, obtained from a particular column in the data-row.
Parameters:
runtime - the expression runtime that is used to evaluate formulas and expressions when computing the value ofthis filter. | | public void | setDataSourceColumnName(String dataSourceColumnName)
Defines the name of the column in the datarow to be queried. | | public void | setFormula(String formula)
Defines the formula used to compute the value of this data source. |
| DataRowDataSource | | public DataRowDataSource()(Code) | | Default constructor.
The expression name is empty ("", not null), the value initially null.
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| DataRowDataSource | | public DataRowDataSource(String column)(Code) | | Constructs a new data source.
Parameters:
column - the name of the field, function or expression in the data-row. |
| getDataSourceColumnName | | public String getDataSourceColumnName()(Code) | | Returns the data source column name.
the column name. |
| getFormula | | public String getFormula()(Code) | | Returns the formula used to compute the value of the data source.
the formula. |
| getValue | | public Object getValue(ExpressionRuntime runtime)(Code) | | Returns the current value of the data source, obtained from a particular column in the data-row.
Parameters:
runtime - the expression runtime that is used to evaluate formulas and expressions when computing the value ofthis filter. the value. |
| setDataSourceColumnName | | public void setDataSourceColumnName(String dataSourceColumnName)(Code) | | Defines the name of the column in the datarow to be queried.
Parameters:
dataSourceColumnName - the name of the column in the datarow to be queried.
throws:
NullPointerException - if the name is null.
See Also: org.jfree.report.DataRow.get |
| setFormula | | public void setFormula(String formula)(Code) | | Defines the formula used to compute the value of this data source.
Parameters:
formula - the formula for the data source. |
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