net.sf.saxon.value
Class YearMonthDurationValue

java.lang.Object
  net.sf.saxon.value.Value
      net.sf.saxon.value.AtomicValue
          net.sf.saxon.value.DurationValue
              net.sf.saxon.value.YearMonthDurationValue

All Implemented Interfaces:

Serializable, Comparable, PullEvent, SequenceIterable, GroundedValue, Item, ValueRepresentation, ConversionResult

public final class YearMonthDurationValue
extends DurationValue
implements Comparable

A value of type xs:yearMonthDuration

See Also:

Serialized Form

Field Summary

Fields inherited from class net.sf.saxon.value.Value

EMPTY_CLASS_ARRAY, INDETERMINATE_ORDERING

Fields inherited from interface net.sf.saxon.om.ValueRepresentation

EMPTY_VALUE_ARRAY

Fields inherited from interface net.sf.saxon.om.ValueRepresentation

EMPTY_VALUE_ARRAY

Method Summary

DurationValue	add(DurationValue other) Add two year-month-durations
int	compareTo(Object other) Compare the value to another duration value
Object	convertToJava(Class target, XPathContext context) Convert to Java object (for passing to external functions)
AtomicValue	copyAsSubType(AtomicType typeLabel) Create a copy of this atomic value, with a different type label
DecimalValue	divide(DurationValue other) Find the ratio between two durations
static YearMonthDurationValue	fromMonths(int months) Construct a duration value as a number of months.
int	getLengthInMonths() Get the number of months in the duration
BuiltInAtomicType	getPrimitiveType() Determine the primitive type of the value.
CharSequence	getStringValueCS() Convert to string
Object	getXPathComparable(boolean ordered, StringCollator collator, XPathContext context) Get a Comparable value that implements the XPath ordering comparison semantics for this value.
static ConversionResult	makeYearMonthDurationValue(CharSequence s) Static factory: create a duration value from a supplied string, in ISO 8601 format [+|-]PnYnM
DurationValue	multiply(double n) Multiply duration by a number.
DurationValue	negate() Negate a duration (same as subtracting from zero, but it preserves the type of the original duration)
DurationValue	subtract(DurationValue other) Subtract two year-month-durations

Methods inherited from class net.sf.saxon.value.DurationValue

convertPrimitive, equals, getComponent, getDays, getHours, getLengthInSeconds, getMicroseconds, getMinutes, getMonths, getSchemaComparable, getSchemaComparable, getSeconds, getStringValue, getYears, hashCode, makeDuration, normalizeDuration, signum

Methods inherited from class net.sf.saxon.value.AtomicValue

asAtomic, checkPermittedContents, convert, convert, effectiveBooleanValue, getCardinality, getItemType, getLength, getTypedValue, getTypeLabel, isNaN, itemAt, iterate, process, setTypeLabel, subsequence, toString

Methods inherited from class net.sf.saxon.value.Value

asItem, asItem, asIterator, asValue, convertJavaObjectToXPath, convertToJava, fromItem, getCanonicalLexicalRepresentation, getIterator, iterate, makeQNameValue, reduce, stringToNumber

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Method Detail

makeYearMonthDurationValue

public static ConversionResult makeYearMonthDurationValue(CharSequence s)

Static factory: create a duration value from a supplied string, in ISO 8601 format [+|-]PnYnM

Parameters:

s - a string in the lexical space of xs:yearMonthDuration.

Returns:

either a YearMonthDurationValue, or a ValidationFailure if the string was not in the lexical space of xs:yearMonthDuration.

copyAsSubType

public AtomicValue copyAsSubType(AtomicType typeLabel)

Create a copy of this atomic value, with a different type label

Overrides:

copyAsSubType in class DurationValue

Parameters:

typeLabel - the type label of the new copy. The caller is responsible for checking that the value actually conforms to this type.

Returns:

the copied value

getPrimitiveType

public BuiltInAtomicType getPrimitiveType()

Determine the primitive type of the value. This delivers the same answer as getItemType().getPrimitiveItemType(). The primitive types are the 19 primitive types of XML Schema, plus xs:integer, xs:dayTimeDuration and xs:yearMonthDuration, and xs:untypedAtomic. For external objects, the result is AnyAtomicType.

Overrides:

getPrimitiveType in class DurationValue

Returns:

the primitive type

getStringValueCS

public CharSequence getStringValueCS()

Convert to string

Specified by:

getStringValueCS in interface Item

Specified by:

getStringValueCS in interface ValueRepresentation

Overrides:

getStringValueCS in class DurationValue

Returns:

ISO 8601 representation.

See Also:

Item.getStringValue()

getLengthInMonths

public int getLengthInMonths()

Get the number of months in the duration

Returns:

the number of months in the duration

fromMonths

public static YearMonthDurationValue fromMonths(int months)

Construct a duration value as a number of months.

Parameters:

months - the number of months (may be negative)

Returns:

the corresponding xs:yearMonthDuration value

multiply

public DurationValue multiply(double n)
                       throws XPathException

Multiply duration by a number. Also used when dividing a duration by a number

Overrides:

multiply in class DurationValue

Parameters:

n - the number to multiply by

Returns:

the result of the multiplication

Throws:

XPathException

divide

public DecimalValue divide(DurationValue other)
                    throws XPathException

Find the ratio between two durations

Overrides:

divide in class DurationValue

Parameters:

other - the dividend

Returns:

the ratio, as a decimal

Throws:

XPathException

add

public DurationValue add(DurationValue other)
                  throws XPathException

Add two year-month-durations

Overrides:

add in class DurationValue

Parameters:

other - the duration to be added to this one

Returns:

the sum of the two durations

Throws:

XPathException

subtract

public DurationValue subtract(DurationValue other)
                       throws XPathException

Subtract two year-month-durations

Overrides:

subtract in class DurationValue

Parameters:

other - the duration to be subtracted from this one

Returns:

the difference of the two durations

Throws:

XPathException

negate

public DurationValue negate()

Negate a duration (same as subtracting from zero, but it preserves the type of the original duration)

Overrides:

negate in class DurationValue

Returns:

the original duration with its sign reversed, retaining its type

convertToJava

public Object convertToJava(Class target,
                            XPathContext context)
                     throws XPathException

Convert to Java object (for passing to external functions)

Overrides:

convertToJava in class DurationValue

Parameters:

target - the required target class

context - the XPath dynamic evaluation context

Returns:

the (boxed) Java object that best represents the XPath value

Throws:

XPathException

compareTo

public int compareTo(Object other)

Compare the value to another duration value

Specified by:

compareTo in interface Comparable

Parameters:

other - The other dateTime value

Returns:

negative value if this one is the earler, 0 if they are chronologically equal, positive value if this one is the later. For this purpose, dateTime values with an unknown timezone are considered to be UTC values (the Comparable interface requires a total ordering).

Throws:

ClassCastException - if the other value is not a DateTimeValue (the parameter is declared as Object to satisfy the Comparable interface)

getXPathComparable

public Object getXPathComparable(boolean ordered,
                                 StringCollator collator,
                                 XPathContext context)

Get a Comparable value that implements the XPath ordering comparison semantics for this value. Returns null if the value is not comparable according to XPath rules. The default implementation returns the value itself. This is modified for types such as xs:duration which allow ordering comparisons in XML Schema, but not in XPath.

Overrides:

getXPathComparable in class DurationValue

Parameters:

ordered -

collator -

context -

Returns:

an Object whose equals() and hashCode() methods implement the XPath comparison semantics with respect to this atomic value. If ordered is specified, the result will either be null if no ordering is defined, or will be a Comparable