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## net.sf.saxon.value
Class DurationValue

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

All Implemented Interfaces:
  Serializable, PullEvent, SequenceIterable, GroundedValue, Item, ValueRepresentation, ConversionResult

Direct Known Subclasses:
  DayTimeDurationValue, YearMonthDurationValue

    public class DurationValue

extends AtomicValue

A value of type xs:duration

See Also:
  Serialized Form

Field Summary
`protected int` | `microseconds`
`protected int` | `months`
`protected boolean` | `negative`
`protected long` | `seconds`

Fields inherited from class net.sf.saxon.value.AtomicValue
`typeLabel`

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

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

Constructor Summary
`protected` | `DurationValue()` Private constructor for internal use
`` | `DurationValue(boolean positive, int years, int months, int days, int hours, int minutes, long seconds, int microseconds)` Constructor for xs:duration taking the components of the duration.
`` | `DurationValue(boolean positive, int years, int months, int days, int hours, int minutes, long seconds, int microseconds, AtomicType type)` Constructor for xs:duration taking the components of the duration, plus a user-specified type which must be a subtype of xs:duration.

Method Summary
`DurationValue` | `add(DurationValue other)` Add two durations
`protected static ValidationFailure` | `badDuration(String msg, CharSequence s)`
`ConversionResult` | `convertPrimitive(BuiltInAtomicType requiredType, boolean validate, ConversionRules rules)` Convert to target data type
`AtomicValue` | `copyAsSubType(AtomicType typeLabel)` Create a copy of this atomic value, with a different type label
`DecimalValue` | `divide(DurationValue other)` Divide a duration by a another duration
`boolean` | `equals(Object other)` Test if the two durations are of equal length.
`AtomicValue` | `getComponent(int component)` Get a component of the normalized value
`int` | `getDays()` Get the days component
`int` | `getHours()` Get the hours component
`double` | `getLengthInSeconds()` Get length of duration in seconds, assuming an average length of month.
`int` | `getMicroseconds()` Get the microseconds component
`int` | `getMinutes()` Get the minutes component
`int` | `getMonths()` Get the months component
`CharSequence` | `getPrimitiveStringValue()` Convert to string
`BuiltInAtomicType` | `getPrimitiveType()` Determine the primitive type of the value.
`Comparable` | `getSchemaComparable()` Get a Comparable value that implements the XML Schema ordering comparison semantics for this value.
`static Comparable` | `getSchemaComparable(DurationValue value)` Get a Comparable value that implements the XML Schema ordering comparison semantics for this value.
`int` | `getSeconds()` Get the seconds component
`Object` | `getXPathComparable(boolean ordered, StringCollator collator, XPathContext context)` Get an object value that implements the XPath equality and ordering comparison semantics for this value.
`int` | `getYears()` Get the year component
`int` | `hashCode()`
`static ConversionResult` | `makeDuration(CharSequence s)` Static factory method: create a duration value from a supplied string, in ISO 8601 format [-]PnYnMnDTnHnMnS
`DurationValue` | `multiply(double factor)` Multiply a duration by a number
`DurationValue` | `negate()` Negate a duration (same as subtracting from zero, but it preserves the type of the original duration)
`DurationValue` | `normalizeDuration()` Deprecated. since 9.0 - the method does nothing
`protected void` | `normalizeZeroDuration()` Ensure that a zero duration is considered positive
`int` | `signum()` Return the signum of the value
`protected static int` | `simpleInteger(String s)` Parse a simple unsigned integer
`DurationValue` | `subtract(DurationValue other)` Subtract two durations

Methods inherited from class net.sf.saxon.value.AtomicValue
`asAtomic, checkPermittedContents, convert, convert, convert, effectiveBooleanValue, getCardinality, getItemType, getLength, getStringValue, getStringValueCS, getTypedValue, getTypeLabel, isIdentical, isNaN, itemAt, iterate, process, setTypeLabel, subsequence, toString`

Methods inherited from class net.sf.saxon.value.Value
`asItem, asItem, asIterator, asValue, convertToJava, fromItem, getCanonicalLexicalRepresentation, getIterator, iterate, reduce`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

Field Detail

### negative

    protected boolean negative

### months

    protected int months

### seconds

    protected long seconds

### microseconds

    protected int microseconds

Constructor Detail

### DurationValue

    protected DurationValue()

  Private constructor for internal use

### DurationValue

    public DurationValue(boolean positive,
                         int years,
                         int months,
                         int days,
                         int hours,
                         int minutes,
                         long seconds,
                         int microseconds)
                  throws IllegalArgumentException

  Constructor for xs:duration taking the components of the duration. There is no requirement that the values are normalized, for example it is acceptable to specify months=18. The values of the individual components must all be non-negative.

  Parameters:
    `positive` - true if the duration is positive, false if negative. For a negative duration the components are all supplied as positive integers (or zero).
    `years` - the number of years
    `months` - the number of months
    `days` - the number of days
    `hours` - the number of hours
    `minutes` - the number of minutes
    `seconds` - the number of seconds
    `microseconds` - the number of microseconds
  Throws:
    `IllegalArgumentException` - if the size of the duration exceeds implementation-defined limits: specifically, if the total number of months exceeds 2^31, or if the total number of seconds exceeds 2^63.

### DurationValue

    public DurationValue(boolean positive,
                         int years,
                         int months,
                         int days,
                         int hours,
                         int minutes,
                         long seconds,
                         int microseconds,
                         AtomicType type)

  Constructor for xs:duration taking the components of the duration, plus a user-specified type which must be a subtype of xs:duration. There is no requirement that the values are normalized, for example it is acceptable to specify months=18. The values of the individual components must all be non-negative.

  Parameters:
    `positive` - true if the duration is positive, false if negative. For a negative duration the components are all supplied as positive integers (or zero).
    `years` - the number of years
    `months` - the number of months
    `days` - the number of days
    `hours` - the number of hours
    `minutes` - the number of minutes
    `seconds` - the number of seconds (long to allow copying)
    `microseconds` - the number of microseconds
    `type` - the user-defined subtype of xs:duration. Note that this constructor cannot be used to create an instance of xs:dayTimeDuration or xs:yearMonthDuration.
  Throws:
    `IllegalArgumentException` - if the size of the duration exceeds implementation-defined limits: specifically, if the total number of months exceeds 2^31, or if the total number of seconds exceeds 2^63.

Method Detail

### normalizeZeroDuration

    protected void normalizeZeroDuration()

  Ensure that a zero duration is considered positive

### makeDuration

    public static ConversionResult makeDuration(CharSequence s)

  Static factory method: create a duration value from a supplied string, in ISO 8601 format [-]PnYnMnDTnHnMnS

  Parameters:
    `s` - a string in the lexical space of xs:duration
  Returns:
    the constructed xs:duration value, or a `ValidationFailure` if the supplied string is lexically invalid.

### badDuration

    protected static ValidationFailure badDuration(String msg,
                                                   CharSequence s)

### simpleInteger

    protected static int simpleInteger(String s)

  Parse a simple unsigned integer

  Parameters:
    `s` - the string containing the sequence of digits. No sign or whitespace is allowed.
  Returns:
    the integer. Return -1 if the string is not a sequence of digits or exceeds 2^31

### copyAsSubType

    public AtomicValue copyAsSubType(AtomicType typeLabel)

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

  Specified by:
    `copyAsSubType` in class `AtomicValue`
  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.

  Specified by:
    `getPrimitiveType` in class `AtomicValue`
  Returns:
    the primitive type

### convertPrimitive

    public ConversionResult convertPrimitive(BuiltInAtomicType requiredType,
                                             boolean validate,
                                             ConversionRules rules)

  Convert to target data type

  Specified by:
    `convertPrimitive` in class `AtomicValue`
  Parameters:
    `requiredType` - an integer identifying the required atomic type
    `validate` - if set to false, the caller asserts that the value is known to be valid
    `rules` -
  Returns:
    an AtomicValue, a value of the required type; or a `ValidationFailure` if the value cannot be converted.

### normalizeDuration

    public DurationValue normalizeDuration()

  Deprecated. since 9.0 - the method does nothing

  Normalize the duration, so that months<12, hours<24, minutes<60, seconds<60. Since durations are now always normalized, this method has become a no-op, but is retained for backwards compatibility

  Returns:
    the duration unchanged

### signum

    public int signum()

  Return the signum of the value

  Returns:
    -1 if the duration is negative, zero if it is zero-length, +1 if it is positive

### getYears

    public int getYears()

  Get the year component

  Returns:
    the number of years in the normalized duration; always positive

### getMonths

    public int getMonths()

  Get the months component

  Returns:
    the number of months in the normalized duration; always positive

### getDays

    public int getDays()

  Get the days component

  Returns:
    the number of days in the normalized duration; always positive

### getHours

    public int getHours()

  Get the hours component

  Returns:
    the number of hours in the normalized duration; always positive

### getMinutes

    public int getMinutes()

  Get the minutes component

  Returns:
    the number of minutes in the normalized duration; always positive

### getSeconds

    public int getSeconds()

  Get the seconds component

  Returns:
    the number of whole seconds in the normalized duration; always positive

### getMicroseconds

    public int getMicroseconds()

  Get the microseconds component

  Returns:
    the number of microseconds in the normalized duration; always positive

### getPrimitiveStringValue

    public CharSequence getPrimitiveStringValue()

  Convert to string

  Specified by:
    `getPrimitiveStringValue` in class `AtomicValue`
  Returns:
    ISO 8601 representation.

### getLengthInSeconds

    public double getLengthInSeconds()

  Get length of duration in seconds, assuming an average length of month. (Note, this defines a total ordering on durations which is different from the partial order defined in XML Schema; XPath 2.0 currently avoids defining an ordering at all. But the ordering here is consistent with the ordering of the two duration subtypes in XPath 2.0.)

  Returns:
    the duration in seconds, as a double

### getComponent

    public AtomicValue getComponent(int component)
                             throws XPathException

  Get a component of the normalized value

  Overrides:
    `getComponent` in class `AtomicValue`
  Parameters:
    `component` - identifies the required component, as a constant defined in class `Component`, for example `Component.HOURS`
  Returns:
    the value of the requested component of this value
  Throws:
    `XPathException`

### getXPathComparable

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

  Get an object value that implements the XPath equality and ordering comparison semantics for this value. If the ordered parameter is set to true, the result will be a Comparable and will support a compareTo() method with the semantics of the XPath lt/gt operator, provided that the other operand is also obtained using the getXPathComparable() method. In all cases the result will support equals() and hashCode() methods that support the semantics of the XPath eq operator, again provided that the other operand is also obtained using the getXPathComparable() method. A context argument is supplied for use in cases where the comparison semantics are context-sensitive, for example where they depend on the implicit timezone or the default collation.

  Specified by:
    `getXPathComparable` in class `AtomicValue`
  Parameters:
    `ordered` - true if an ordered comparison is required. In this case the result is null if the type is unordered; in other cases the returned value will be a Comparable.
    `collator` - collation used for comparing string values
    `context` - the XPath dynamic evaluation context, used in cases where the comparison is context sensitive @return an Object whose equals() and hashCode() methods implement the XPath comparison semantics
  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

### equals

    public boolean equals(Object other)

  Test if the two durations are of equal length.

  Specified by:
    `equals` in class `AtomicValue`
  Parameters:
    `other` - the other value
  Returns:
    true if the other operand is an atomic value and the two values are equal as defined by the XPath eq operator
  Throws:
    `ClassCastException` - if the other value is not an xs:duration or subtype thereof

### hashCode

    public int hashCode()

  Overrides:
    `hashCode` in class `Value`

### add

    public DurationValue add(DurationValue other)
                      throws XPathException

  Add two durations

  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 durations

  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)

  Returns:
    the original duration with its sign reversed, retaining its type

### multiply

    public DurationValue multiply(double factor)
                           throws XPathException

  Multiply a duration by a number

  Parameters:
    `factor` - the number to multiply by
  Returns:
    the result of the multiplication
  Throws:
    `XPathException`

### divide

    public DecimalValue divide(DurationValue other)
                        throws XPathException

  Divide a duration by a another duration

  Parameters:
    `other` - the duration to divide by
  Returns:
    the result of the division
  Throws:
    `XPathException`

### getSchemaComparable

    public Comparable getSchemaComparable()

  Get a Comparable value that implements the XML Schema ordering comparison semantics for this value. This implementation handles the ordering rules for durations in XML Schema. It is overridden for the two subtypes DayTimeDuration and YearMonthDuration.

  Specified by:
    `getSchemaComparable` in class `AtomicValue`
  Returns:
    a suitable Comparable

### getSchemaComparable

    public static Comparable getSchemaComparable(DurationValue value)

  Get a Comparable value that implements the XML Schema ordering comparison semantics for this value. This implementation handles the ordering rules for durations in XML Schema.

  Parameters:
    `value` - the duration for which a comparison key is required
  Returns:
    a suitable Comparable

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Copyright (c) 2004-2010 Saxonica Limited. All rights reserved.