org.deri.iris.terms.concrete
Class XmlDurationWorkAroundHelper

java.lang.Object
  org.deri.iris.terms.concrete.XmlDurationWorkAroundHelper

public class XmlDurationWorkAroundHelper
extends Object

IRIS duration objects are implemented using the javax.xml.datatype.Duration class. However, there are a number of problems/bugs in the implementation of this class, specifically with the add(), subtract(), equals() and compareTo() methods. These methods do not work correctly when created using BigDecimal seconds, even though the seconds component may be a whole number of seconds.

Constructor Summary

XmlDurationWorkAroundHelper()

Method Summary

static Duration	add(Duration d1, Duration d2) Add one Duration to another, avoiding the runtime library bug that gives incorrect results when using decimal seconds.
static int	compare(Duration d1, Duration d2) Special compare method that gets around the problem in java 1.5, where years and months are converted to days after arithmetic.
static int	computeHashCode(Duration duration)
static boolean	equals(Duration d1, Duration d2) Special equality method that gets around the problem in java 1.5, where years and months are converted to days after arithmetic.
static BigDecimal	getSeconds(XMLGregorianCalendar x)
static Duration	subtract(Duration d1, Duration d2) Subtract one Duration from another, avoiding the runtime library bug that gives incorrect results when using decimal seconds.
static Duration	subtract(XMLGregorianCalendar x1, XMLGregorianCalendar x2)
protected static String	toString(GregorianCalendar g1)

Methods inherited from class java.lang.Object

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

Constructor Detail

XmlDurationWorkAroundHelper

public XmlDurationWorkAroundHelper()

Method Detail

add

public static Duration add(Duration d1,
                           Duration d2)

Add one Duration to another, avoiding the runtime library bug that gives incorrect results when using decimal seconds.

Parameters:

d1 - The first duration

d2 - The second duration

Returns:

The result of adding d1 to d2

subtract

public static Duration subtract(Duration d1,
                                Duration d2)

Subtract one Duration from another, avoiding the runtime library bug that gives incorrect results when using decimal seconds.

Parameters:

d1 - The first duration

d2 - The second duration

Returns:

The result of subtracting d2 from d1

equals

public static boolean equals(Duration d1,
                             Duration d2)

Special equality method that gets around the problem in java 1.5, where years and months are converted to days after arithmetic.

Parameters:

d1 - First duration

d2 - Second duration

Returns:

true if the two duration objects are equal in either raw or day-normalised form.

compare

public static int compare(Duration d1,
                          Duration d2)

Special compare method that gets around the problem in java 1.5, where years and months are converted to days after arithmetic.

Parameters:

d1 - First duration

d2 - Second duration

Returns:

-1 if d1 < d2, 0 if d1 == d2 and +1 if d1 > d2

computeHashCode

public static int computeHashCode(Duration duration)

getSeconds

public static BigDecimal getSeconds(XMLGregorianCalendar x)

subtract

public static Duration subtract(XMLGregorianCalendar x1,
                                XMLGregorianCalendar x2)

toString

protected static String toString(GregorianCalendar g1)