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org.jfree.data.time
Class TimeSeriesDataItem

java.lang.Object
  extended by org.jfree.data.time.TimeSeriesDataItem
All Implemented Interfaces:
java.io.Serializable, java.lang.Cloneable, java.lang.Comparable

public class TimeSeriesDataItem
extends java.lang.Object
implements java.lang.Cloneable, java.lang.Comparable, java.io.Serializable

Represents one data item in a time series.

The time period can be any of the following:

The time period is an immutable property of the data item. Data items will often be sorted within a list, and allowing the time period to be changed could destroy the sort order.

Implements the Comparable interface so that standard Java sorting can be used to keep the data items in order.

See Also:
Serialized Form

Constructor Summary
TimeSeriesDataItem(RegularTimePeriod period, double value)
          Constructs a new data item that associates a value with a time period.
TimeSeriesDataItem(RegularTimePeriod period, java.lang.Number value)
          Constructs a new data item that associates a value with a time period.
 
Method Summary
 java.lang.Object clone()
          Clones the data item.
 int compareTo(java.lang.Object o1)
          Returns an integer indicating the order of this data pair object relative to another object.
 boolean equals(java.lang.Object o)
          Tests this object for equality with an arbitrary object.
 RegularTimePeriod getPeriod()
          Returns the time period.
 java.lang.Number getValue()
          Returns the value.
 int hashCode()
          Returns a hash code.
 void setValue(java.lang.Number value)
          Sets the value for this data item.
 
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

TimeSeriesDataItem

public TimeSeriesDataItem(RegularTimePeriod period,
                          java.lang.Number value)
Constructs a new data item that associates a value with a time period.

Parameters:
period - the time period (null not permitted).
value - the value (null permitted).

TimeSeriesDataItem

public TimeSeriesDataItem(RegularTimePeriod period,
                          double value)
Constructs a new data item that associates a value with a time period.

Parameters:
period - the time period (null not permitted).
value - the value associated with the time period.
Method Detail

getPeriod

public RegularTimePeriod getPeriod()
Returns the time period.

Returns:
The time period (never null).

getValue

public java.lang.Number getValue()
Returns the value.

Returns:
The value (null possible).

setValue

public void setValue(java.lang.Number value)
Sets the value for this data item.

Parameters:
value - the value (null permitted).

equals

public boolean equals(java.lang.Object o)
Tests this object for equality with an arbitrary object.

Overrides:
equals in class java.lang.Object
Parameters:
o - the other object.
Returns:
A boolean.

hashCode

public int hashCode()
Returns a hash code.

Overrides:
hashCode in class java.lang.Object
Returns:
A hash code.

compareTo

public int compareTo(java.lang.Object o1)
Returns an integer indicating the order of this data pair object relative to another object.

For the order we consider only the timing: negative == before, zero == same, positive == after.

Specified by:
compareTo in interface java.lang.Comparable
Parameters:
o1 - The object being compared to.
Returns:
An integer indicating the order of the data item object relative to another object.

clone

public java.lang.Object clone()
Clones the data item. Note: there is no need to clone the period or value since they are immutable classes.

Overrides:
clone in class java.lang.Object
Returns:
A clone of the data item.

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