Package net.sf.saxon.value
Class DateTimeValue
- java.lang.Object
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- net.sf.saxon.value.Value<AtomicValue>
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- net.sf.saxon.value.AtomicValue
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- net.sf.saxon.value.CalendarValue
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- net.sf.saxon.value.DateTimeValue
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- All Implemented Interfaces:
java.lang.Comparable
,PullEvent
,GroundedValue<AtomicValue>
,Item<AtomicValue>
,ValueRepresentation<AtomicValue>
,ConversionResult
public final class DateTimeValue extends CalendarValue implements java.lang.Comparable
A value of type DateTime
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Field Summary
Fields Modifier and Type Field Description static DateTimeValue
EPOCH
Fixed date/time used by Java (and Unix) as the origin of the universe: 1970-01-01-
Fields inherited from class net.sf.saxon.value.CalendarValue
NO_TIMEZONE
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Fields inherited from class net.sf.saxon.value.AtomicValue
typeLabel
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Fields inherited from class net.sf.saxon.value.Value
INDETERMINATE_ORDERING
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Fields inherited from interface net.sf.saxon.om.ValueRepresentation
EMPTY_VALUE_ARRAY
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Constructor Summary
Constructors Constructor Description DateTimeValue(int year, byte month, byte day, byte hour, byte minute, byte second, int microsecond, int tz, boolean xsd10Check)
Constructor: construct a DateTimeValue from its components.DateTimeValue(java.util.Calendar calendar, boolean tzSpecified)
Constructor: create a dateTime value given a Java calendar object
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description CalendarValue
add(DurationValue duration)
Add a duration to a dateTimeCalendarValue
adjustTimezone(int timezone)
Return a new dateTime with the same normalized value, but in a different timezone.int
compareTo(java.lang.Object v2)
Context-free comparison of two DateTimeValue values.int
compareTo(CalendarValue other, XPathContext context)
Compare the value to another dateTime value, following the XPath comparison semanticsValidationFailure
convertToSubType(BuiltInAtomicType subtype)
Convert the value to a built-in subtype of xs:dateTimeAtomicValue
copyAsSubType(AtomicType typeLabel)
Make a copy of this date, time, or dateTime value, but with a new type labelboolean
equals(java.lang.Object o)
Context-free comparison of two dateTime valuesstatic DateTimeValue
fromJavaDate(java.util.Date suppliedDate)
Factory method: create a dateTime value given a Java Date object.static DateTimeValue
fromJulianInstant(java.math.BigDecimal instant)
Get the DateTimeValue corresponding to a given Julian instantjava.util.GregorianCalendar
getCalendar()
Get a Java Calendar object representing the value of this DateTime.java.lang.CharSequence
getCanonicalLexicalRepresentation()
Get the canonical lexical representation as defined in XML Schema.ComparisonKey
getComparisonKey(XPathContext context)
Get a comparison key for this value.AtomicValue
getComponent(int component)
Get a component of the value.static DateTimeValue
getCurrentDateTime(XPathContext context)
Get the dateTime value representing the nominal date/time of this transformation run.byte
getDay()
Get the day component, 1-31byte
getHour()
Get the hour component, 0-23int
getMicrosecond()
Get the microsecond component, 0-999999byte
getMinute()
Get the minute component, 0-59byte
getMonth()
Get the month component, 1-12java.lang.CharSequence
getPrimitiveStringValue()
Convert to stringBuiltInAtomicType
getPrimitiveType()
Determine the primitive type of the value.java.lang.Comparable
getSchemaComparable()
Get a Comparable value that implements the XML Schema ordering comparison semantics for this value.byte
getSecond()
Get the second component, 0-59int
getYear()
Get the year component, in its internal form (which allows a year zero)int
hashCode()
Hash code for context-free comparison of date time values.(package private) static int
hashCode(int year, byte month, byte day, byte hour, byte minute, byte second, int microsecond, int tzMinutes)
boolean
isXsd10Rules()
Ask whether this value uses the XSD 1.0 rules (which don't allow year zero) or the XSD 1.1 rules (which do).static ConversionResult
makeDateTimeValue(java.lang.CharSequence s, ConversionRules rules)
Factory method: create a dateTime value from a supplied string, in ISO 8601 formatstatic DateTimeValue
makeDateTimeValue(DateValue date, TimeValue time)
Factory method: create a dateTime value given a date and a time.DateTimeValue
normalize(XPathContext cc)
Normalize the date and time to be in timezone Z.DayTimeDurationValue
subtract(CalendarValue other, XPathContext context)
Determine the difference between two points in time, as a durationDateTimeValue
toDateTime()
Convert the value to a DateTime, retaining all the components that are actually present, and substituting conventional values for components that are missing.DateValue
toDateValue()
Extract the Date partjava.math.BigDecimal
toJulianInstant()
Get the Julian instant: a decimal value whose integer part is the Julian day number multiplied by the number of seconds per day, and whose fractional part is the fraction of the second.TimeValue
toTimeValue()
Extract the Time part-
Methods inherited from class net.sf.saxon.value.CalendarValue
adjustTimezone, appendString, appendTimezone, appendTimezone, appendTwoDigits, getTimezoneInMinutes, getXPathComparable, hasTimezone, isIdentical, makeCalendarValue, removeTimezone, setTimezoneInMinutes
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Methods inherited from class net.sf.saxon.value.AtomicValue
asAtomic, checkPermittedContents, effectiveBooleanValue, getCardinality, getItemType, getLength, getStringValue, getStringValueCS, getTypedValue, getTypeLabel, isNaN, itemAt, iterate, process, setTypeLabel, subsequence, toString
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Methods inherited from class net.sf.saxon.value.Value
asItem, asItem, asIterator, asValue, convertToJava, fromItem, getIterator, getSequenceLength, reduce
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Field Detail
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EPOCH
public static final DateTimeValue EPOCH
Fixed date/time used by Java (and Unix) as the origin of the universe: 1970-01-01
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Constructor Detail
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DateTimeValue
public DateTimeValue(java.util.Calendar calendar, boolean tzSpecified)
Constructor: create a dateTime value given a Java calendar object- Parameters:
calendar
- holds the date and timetzSpecified
- indicates whether the timezone is specified
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DateTimeValue
public DateTimeValue(int year, byte month, byte day, byte hour, byte minute, byte second, int microsecond, int tz, boolean xsd10Check)
Constructor: construct a DateTimeValue from its components. This constructor performs no validation.- Parameters:
year
- The year as held internally (note that the year before 1AD is 0)month
- The month, 1-12day
- The day 1-31hour
- the hour value, 0-23minute
- the minutes value, 0-59second
- the seconds value, 0-59microsecond
- the number of microseconds, 0-999999tz
- the timezone displacement in minutes from UTC. Supply the valueCalendarValue.NO_TIMEZONE
if there is no timezone component.xsd10Check
- true if the dateTime value should behave under XSD 1.0 rules, that is, negative dates assume there is no year zero. (Not that regardless of this setting, the year argument is set on the basis that the year before +1 is supplied as zero; but if the xsd10Check flag is set, this value will be displayed with a year of -1.)
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Method Detail
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getCurrentDateTime
public static DateTimeValue getCurrentDateTime(XPathContext context)
Get the dateTime value representing the nominal date/time of this transformation run. Two calls within the same query or transformation will always return the same answer.- Parameters:
context
- the XPath dynamic context. May be null, in which case the current date and time are taken directly from the system clock- Returns:
- the current xs:dateTime
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fromJavaDate
public static DateTimeValue fromJavaDate(java.util.Date suppliedDate) throws XPathException
Factory method: create a dateTime value given a Java Date object. The returned dateTime value will always have a timezone, which will always be UTC.- Parameters:
suppliedDate
- holds the date and time- Returns:
- the corresponding xs:dateTime value
- Throws:
XPathException
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makeDateTimeValue
public static DateTimeValue makeDateTimeValue(DateValue date, TimeValue time) throws XPathException
Factory method: create a dateTime value given a date and a time.- Parameters:
date
- the datetime
- the time- Returns:
- the dateTime with the given components. If either component is null, returns null
- Throws:
XPathException
- if the timezones are both present and inconsistent
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makeDateTimeValue
public static ConversionResult makeDateTimeValue(java.lang.CharSequence s, ConversionRules rules)
Factory method: create a dateTime value from a supplied string, in ISO 8601 format- Parameters:
s
- a string in the lexical space of xs:dateTimerules
- the conversion rules to be used (determining whether year zero is allowed)- Returns:
- either a DateTimeValue representing the xs:dateTime supplied, or a ValidationFailure if the lexical value was invalid
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convertToSubType
public ValidationFailure convertToSubType(BuiltInAtomicType subtype)
Convert the value to a built-in subtype of xs:dateTime- Parameters:
subtype
- the target subtype- Returns:
- null if the conversion succeeds; a ValidationFailure describing the failure if it fails.
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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 classAtomicValue
- Returns:
- the primitive type
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getYear
public int getYear()
Get the year component, in its internal form (which allows a year zero)- Returns:
- the year component
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getMonth
public byte getMonth()
Get the month component, 1-12- Returns:
- the month component
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getDay
public byte getDay()
Get the day component, 1-31- Returns:
- the day component
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getHour
public byte getHour()
Get the hour component, 0-23- Returns:
- the hour component (never 24, even if the input was specified as 24:00:00)
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getMinute
public byte getMinute()
Get the minute component, 0-59- Returns:
- the minute component
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getSecond
public byte getSecond()
Get the second component, 0-59- Returns:
- the second component
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getMicrosecond
public int getMicrosecond()
Get the microsecond component, 0-999999- Returns:
- the microsecond component
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toDateTime
public DateTimeValue toDateTime()
Convert the value to a DateTime, retaining all the components that are actually present, and substituting conventional values for components that are missing. (This method does nothing in the case of xs:dateTime, but is there to implement a method in theCalendarValue
interface).- Specified by:
toDateTime
in classCalendarValue
- Returns:
- the value as an xs:dateTime
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isXsd10Rules
public boolean isXsd10Rules()
Ask whether this value uses the XSD 1.0 rules (which don't allow year zero) or the XSD 1.1 rules (which do).- Returns:
- true if the value uses the XSD 1.0 rules
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normalize
public DateTimeValue normalize(XPathContext cc) throws NoDynamicContextException
Normalize the date and time to be in timezone Z.- Parameters:
cc
- used to supply the implicit timezone, used when the value has no explicit timezone- Returns:
- in general, a new DateTimeValue in timezone Z, representing the same instant in time. Returns the original DateTimeValue if this is already in timezone Z.
- Throws:
NoDynamicContextException
- if the implicit timezone is needed and is not available
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getComparisonKey
public ComparisonKey getComparisonKey(XPathContext context) throws NoDynamicContextException
Get a comparison key for this value. Two values are equal if and only if they their comparison keys are equal- Specified by:
getComparisonKey
in classCalendarValue
- Parameters:
context
- XPath dynamic context- Returns:
- a comparison key
- Throws:
NoDynamicContextException
- if the implicit timezone is needed and is not available
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toJulianInstant
public java.math.BigDecimal toJulianInstant()
Get the Julian instant: a decimal value whose integer part is the Julian day number multiplied by the number of seconds per day, and whose fractional part is the fraction of the second. This method operates on the local time, ignoring the timezone. The caller should call normalize() before calling this method to get a normalized time.- Returns:
- the Julian instant corresponding to this xs:dateTime value
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fromJulianInstant
public static DateTimeValue fromJulianInstant(java.math.BigDecimal instant)
Get the DateTimeValue corresponding to a given Julian instant- Parameters:
instant
- the Julian instant: a decimal value whose integer part is the Julian day number multiplied by the number of seconds per day, and whose fractional part is the fraction of the second.- Returns:
- the xs:dateTime value corresponding to the Julian instant. This will always be in timezone Z.
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getCalendar
public java.util.GregorianCalendar getCalendar()
Get a Java Calendar object representing the value of this DateTime. This will respect the timezone if there is one, or be in GMT otherwise.- Specified by:
getCalendar
in classCalendarValue
- Returns:
- a Java GregorianCalendar object representing the value of this xs:dateTime value.
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getPrimitiveStringValue
public java.lang.CharSequence getPrimitiveStringValue()
Convert to string- Specified by:
getPrimitiveStringValue
in classAtomicValue
- Returns:
- ISO 8601 representation. The value returned is the localized representation, that is it uses the timezone contained within the value itself.
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toDateValue
public DateValue toDateValue()
Extract the Date part- Returns:
- a DateValue representing the date part of the dateTime, retaining the timezone or its absence
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toTimeValue
public TimeValue toTimeValue()
Extract the Time part- Returns:
- a TimeValue representing the date part of the dateTime, retaining the timezone or its absence
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getCanonicalLexicalRepresentation
public java.lang.CharSequence getCanonicalLexicalRepresentation()
Get the canonical lexical representation as defined in XML Schema. This is not always the same as the result of casting to a string according to the XPath rules. For an xs:dateTime it is the date/time adjusted to UTC.- Overrides:
getCanonicalLexicalRepresentation
in classValue<AtomicValue>
- Returns:
- the canonical lexical representation as defined in XML Schema
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copyAsSubType
public AtomicValue copyAsSubType(AtomicType typeLabel)
Make a copy of this date, time, or dateTime value, but with a new type label- Specified by:
copyAsSubType
in classAtomicValue
- Parameters:
typeLabel
- the type label to be attached to the new copy. It is the caller's responsibility to ensure that the value actually conforms to the rules for this type.- Returns:
- the copied value
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adjustTimezone
public CalendarValue adjustTimezone(int timezone)
Return a new dateTime with the same normalized value, but in a different timezone.- Specified by:
adjustTimezone
in classCalendarValue
- Parameters:
timezone
- the new timezone offset, in minutes- Returns:
- the date/time in the new timezone. This will be a new DateTimeValue unless no change was required to the original value
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add
public CalendarValue add(DurationValue duration) throws XPathException
Add a duration to a dateTime- Specified by:
add
in classCalendarValue
- Parameters:
duration
- the duration to be added (may be negative)- Returns:
- the new date
- Throws:
XPathException
- if the duration is an xs:duration, as distinct from a subclass thereof
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subtract
public DayTimeDurationValue subtract(CalendarValue other, XPathContext context) throws XPathException
Determine the difference between two points in time, as a duration- Overrides:
subtract
in classCalendarValue
- Parameters:
other
- the other point in timecontext
- the XPath dynamic context- Returns:
- the duration as an xs:dayTimeDuration
- Throws:
XPathException
- for example if one value is a date and the other is a time
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getComponent
public AtomicValue getComponent(int component) throws XPathException
Get a component of the value. Returns null if the timezone component is requested and is not present.- Overrides:
getComponent
in classAtomicValue
- Parameters:
component
- identifies the required component, as a constant defined in classComponent
, for exampleComponent.HOURS
- Returns:
- the value of the requested component of this value
- Throws:
XPathException
- if a dynamic error occurs
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compareTo
public int compareTo(CalendarValue other, XPathContext context) throws NoDynamicContextException
Compare the value to another dateTime value, following the XPath comparison semantics- Specified by:
compareTo
in classCalendarValue
- Parameters:
other
- The other dateTime valuecontext
- XPath dynamic evaluation context- 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 values in the implicit timezone (the Comparable interface requires a total ordering).
- Throws:
java.lang.ClassCastException
- if the other value is not a DateTimeValue (the parameter is declared as CalendarValue to satisfy the interface)NoDynamicContextException
- if the implicit timezone is needed and is not available
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compareTo
public int compareTo(java.lang.Object v2)
Context-free comparison of two DateTimeValue values. For this to work, the two values must either both have a timezone or both have none.- Specified by:
compareTo
in interfacejava.lang.Comparable
- Parameters:
v2
- the other value- Returns:
- the result of the comparison: -1 if the first is earlier, 0 if they are equal, +1 if the first is later
- Throws:
java.lang.ClassCastException
- if the values are not comparable (which might be because no timezone is available)
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getSchemaComparable
public java.lang.Comparable getSchemaComparable()
Description copied from class:AtomicValue
Get a Comparable value that implements the XML Schema ordering comparison semantics for this value. An implementation must be provided for all atomic types.In the case of data types that are partially ordered, the returned Comparable extends the standard semantics of the compareTo() method by returning the value
Value.INDETERMINATE_ORDERING
when there is no defined order relationship between two given values. This value is also returned when two values of different types are compared.- Specified by:
getSchemaComparable
in classAtomicValue
- Returns:
- a Comparable that follows XML Schema comparison rules
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equals
public boolean equals(java.lang.Object o)
Context-free comparison of two dateTime values- Specified by:
equals
in classAtomicValue
- Parameters:
o
- the other date time value- Returns:
- true if the two values represent the same instant in time
- Throws:
java.lang.ClassCastException
- if one of the values has a timezone and the other does not
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hashCode
public int hashCode()
Hash code for context-free comparison of date time values. Note that equality testing and therefore hashCode() works only for values with a timezone- Overrides:
hashCode
in classValue<AtomicValue>
- Returns:
- a hash code
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hashCode
static int hashCode(int year, byte month, byte day, byte hour, byte minute, byte second, int microsecond, int tzMinutes)
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