org.pentaho.reporting.engine.classic.core.states.crosstab

Class CrosstabProcessorFunction

java.lang.Object

org.pentaho.reporting.engine.classic.core.function.AbstractExpression

org.pentaho.reporting.engine.classic.core.function.AbstractFunction

org.pentaho.reporting.engine.classic.core.states.crosstab.CrosstabProcessorFunction

All Implemented Interfaces:

Serializable, Cloneable, EventListener, ReportListener, Expression, Function, StructureFunction

public class CrosstabProcessorFunction
extends AbstractFunction
implements StructureFunction

Computes the column-axis values for all crosstabs in the current report.

Author:

Thomas Morgner

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CrosstabProcessorFunction()

Method Summary

Modifier and Type	Method and Description
Object	clone() Clones the expression.
int	getDependencyLevel() Returns the dependency level for the expression (controls evaluation order for expressions and functions).
Expression	getInstance() Return a completly separated copy of this function.
int	getProcessingPriority()
Object	getValue() Return the current expression value.
void	groupFinished(ReportEvent event) Receives notification that a group has finished.
void	groupStarted(ReportEvent event) Receives notification that a group has started.
void	itemsAdvanced(ReportEvent event) Receives notification that a row of data is being processed.

Methods inherited from class org.pentaho.reporting.engine.classic.core.function.AbstractFunction

itemsFinished, itemsStarted, reportDone, reportFinished, reportInitialized, reportStarted, summaryRowSelection

Methods inherited from class org.pentaho.reporting.engine.classic.core.function.AbstractExpression

getDataRow, getName, getReportConfiguration, getResourceBundleFactory, getRuntime, isActive, isDeepTraversing, isPreserve, setActive, setDependencyLevel, setName, setPreserve, setRuntime

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.pentaho.reporting.engine.classic.core.event.ReportListener

itemsFinished, itemsStarted, reportDone, reportFinished, reportInitialized, reportStarted, summaryRowSelection

Methods inherited from interface org.pentaho.reporting.engine.classic.core.function.Expression

getDataRow, getName, getReportConfiguration, getResourceBundleFactory, getRuntime, isActive, isDeepTraversing, isPreserve, setDependencyLevel, setName, setRuntime

Constructor Detail

CrosstabProcessorFunction

public CrosstabProcessorFunction()

Method Detail

getProcessingPriority

public int getProcessingPriority()

Specified by:

getProcessingPriority in interface StructureFunction

groupStarted

public void groupStarted(ReportEvent event)

Receives notification that a group has started.

Specified by:

groupStarted in interface ReportListener

Overrides:

groupStarted in class AbstractFunction

Parameters:

event - the event.

groupFinished

public void groupFinished(ReportEvent event)

Receives notification that a group has finished.

Specified by:

groupFinished in interface ReportListener

Overrides:

groupFinished in class AbstractFunction

Parameters:

event - the event.

itemsAdvanced

public void itemsAdvanced(ReportEvent event)

Receives notification that a row of data is being processed.

Specified by:

itemsAdvanced in interface ReportListener

Overrides:

itemsAdvanced in class AbstractFunction

Parameters:

event - the event.

getValue

public Object getValue()

Return the current expression value.

The value depends (obviously) on the expression implementation.

Specified by:

getValue in interface Expression

Returns:

the value of the function.

getDependencyLevel

public int getDependencyLevel()

Returns the dependency level for the expression (controls evaluation order for expressions and functions).

Specified by:

getDependencyLevel in interface Expression

Overrides:

getDependencyLevel in class AbstractExpression

Returns:

the level.

clone

public Object clone()
             throws CloneNotSupportedException

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

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

Specified by:

clone in interface Expression

Overrides:

clone in class AbstractExpression

Returns:

a clone of this expression.

Throws:

CloneNotSupportedException - this should never happen.

getInstance

public Expression getInstance()

Return a completly separated copy of this function. The copy does no longer share any changeable objects with the original function.

Specified by:

getInstance in interface Expression

Overrides:

getInstance in class AbstractExpression

Returns:

a copy of this function.