Class FormulaFunction

public FormulaFunction()

public Function advance()
            throws DataSourceException

When the advance method is called, the function is asked to perform the next step of its computation.

The original function must not be altered during that step (or more correctly, calling advance on the original expression again must not return a different result).

Specified by:

advance in interface Function

Returns:

a copy of the function containing the new state.

public Object clone()
            throws CloneNotSupportedException

Clones the expression, expression should be reinitialized after the cloning.

Expression maintain no state, cloning is done at the beginning of the report processing to disconnect the used expression from any other object space.

Specified by:

clone in interface Expression

Overrides:

clone in interface AbstractExpression

Returns:

A clone of this expression.

public Object computeValue()
            throws DataSourceException

Return the current expression value.

The value depends (obviously) on the expression implementation.

Specified by:

computeValue in interface Expression

Returns:

the value of the function.

public Formula getCompiledFormula()
            throws ParseException

Returns the compiled formula. The formula is not connected to a formula context.

Returns:

the formula.

public String getFormula()

public String getFormulaExpression()

public String getFormulaNamespace()

public String getInitial()

public String getInitialExpression()

public String getInitialNamespace()

public void setFormula(String formula)

public void setInitial(String initial)