org.jfree.report.expressions

Class FormulaExpression

java.lang.Object

org.jfree.report.expressions.AbstractExpression

org.jfree.report.expressions.FormulaExpression

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, Expression

public class FormulaExpression
extends AbstractExpression

Creation-Date: 04.11.2006, 19:24:04

Author:

Thomas Morgner

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
FormulaExpression()

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone() Clones the expression, expression should be reinitialized after the cloning.
java.lang.Object	computeValue() Return the current expression value.
org.pentaho.reporting.libraries.formula.Formula	getCompiledFormula() Returns the compiled formula.
java.lang.String	getFormula()
java.lang.String	getFormulaExpression()
java.lang.String	getFormulaNamespace()
void	setFormula(java.lang.String formula)

Methods inherited from class org.jfree.report.expressions.AbstractExpression

getDataRow, getInstance, getName, getParentLocale, getReportConfiguration, getResourceBundleFactory, getRuntime, isDeepTraversing, isPrecompute, isPreserve, setDeepTraversing, setName, setPrecompute, setPreserve, setRuntime

Methods inherited from class java.lang.Object

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

Constructor Detail

FormulaExpression

public FormulaExpression()

Method Detail

getFormula

public java.lang.String getFormula()

getFormulaNamespace

public java.lang.String getFormulaNamespace()

getFormulaExpression

public java.lang.String getFormulaExpression()

setFormula

public void setFormula(java.lang.String formula)

getCompiledFormula

public org.pentaho.reporting.libraries.formula.Formula getCompiledFormula()
                                                                   throws org.pentaho.reporting.libraries.formula.parser.ParseException

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

Returns:

the formula.

Throws:

org.pentaho.reporting.libraries.formula.parser.ParseException - if the formula contains syntax errors.

computeValue

public java.lang.Object computeValue()
                              throws DataSourceException

Return the current expression value.

The value depends (obviously) on the expression implementation.

Returns:

the value of the function.

Throws:

DataSourceException

clone

public java.lang.Object clone()
                       throws java.lang.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 class AbstractExpression

Returns:

A clone of this expression.

Throws:

java.lang.CloneNotSupportedException - this should never happen.