net.sf.statcvs.reportmodel
Class TimeLine

java.lang.Object
  net.sf.statcvs.reportmodel.TimeLine

public class TimeLine
extends java.lang.Object

Contains time line data for an integer value. The semantics is that at every data point, the time line's value changed from the previous point's value to the current point's value. Time points may be specified either by an absolute value using addTimePoint, or by a value relative to the previous time point using addChange(java.util.Date, int). If all points are specified using addChange, an initial value must be given using setInitialValue(int).

Version:

$Id: TimeLine.java,v 1.5 2008/04/02 11:52:02 benoitx Exp $

Author:

Richard Cyganiak

Constructor Summary

TimeLine(java.lang.String title, java.lang.String rangeLabel)
Creates a new time line.

Method Summary

void	addChange(java.util.Date date, int delta) Specifies that the time line's value changed at a given date.
void	addTimePoint(java.util.Date date, int value) Adds a data point to the time line.
java.util.List	getDataPoints() Returns a List of data points, ordered by date.
java.lang.String	getRangeLabel() Returns the range label (axis label) of the values
java.lang.String	getTitle() Returns the title of the time line
boolean	isEmpty() Checks if the time series is empty.
void	setInitialValue(int initialValue) Sets the initial value of the time line, that is the value just before the first data point.

Methods inherited from class java.lang.Object

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

Constructor Detail

TimeLine

public TimeLine(java.lang.String title,
                java.lang.String rangeLabel)

Creates a new time line.

Parameters:

title - the time line's title

rangeLabel - a range label (axis label) for the values

Method Detail

setInitialValue

public void setInitialValue(int initialValue)

Sets the initial value of the time line, that is the value just before the first data point.

Parameters:

initialValue - the time line's initial value

addTimePoint

public void addTimePoint(java.util.Date date,
                         int value)

Adds a data point to the time line. Data points may be added in any order.

Parameters:

date - the data point's date

value - the data point's value

addChange

public void addChange(java.util.Date date,
                      int delta)

Specifies that the time line's value changed at a given date. Data points may be added in any order.

Parameters:

date - the data point's date

delta - the value change at this time

isEmpty

public boolean isEmpty()

Checks if the time series is empty. A series is considered empty if it has zero or one time points. It takes two distinct time points to actually make it a series.

Returns:

true if the time series is empty

getDataPoints

public java.util.List getDataPoints()

Returns a List of data points, ordered by date.

Returns:

a List of TimePoints

getRangeLabel

public java.lang.String getRangeLabel()

Returns the range label (axis label) of the values

Returns:

an axis label for the values

getTitle

public java.lang.String getTitle()

Returns the title of the time line

Returns:

the title