net.sf.saxon.value

Class UntypedAtomicValue

java.lang.Object

net.sf.saxon.om.AbstractItem

net.sf.saxon.value.AtomicValue

net.sf.saxon.value.StringValue

net.sf.saxon.value.UntypedAtomicValue

All Implemented Interfaces:

Iterable<AtomicValue>, PullEvent, AtomicSequence, GroundedValue, IdentityComparable, Item, Sequence, ConversionResult

public class UntypedAtomicValue
extends StringValue

An Untyped Atomic value. This inherits from StringValue for implementation convenience, even though an untypedAtomic value is not a String in the data model type hierarchy.

Nested Class Summary

Nested classes/interfaces inherited from class net.sf.saxon.value.StringValue

StringValue.CharacterIterator, StringValue.UnicodeCharacterIterator

Field Summary

Fields

Modifier and Type	Field and Description
static UntypedAtomicValue	ZERO_LENGTH_UNTYPED

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

EMPTY_STRING, FALSE, SINGLE_SPACE, TRUE, value

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

NaN_MATCH_KEY, typeLabel

Constructor Summary

Constructors

Constructor and Description
UntypedAtomicValue(CharSequence value) Constructor

Method Summary

Methods

Modifier and Type	Method and Description
int	compareTo(AtomicValue other, StringCollator collator, XPathContext context) Compare an untypedAtomic value with another value, using a given collator to perform any string comparisons.
AtomicValue	copyAsSubType(AtomicType typeLabel) Create a copy of this atomic value, with a different type label
DoubleValue	getDoubleValueIfKnown() Get the result of converting this untyped atomic value to a double, if this is already known.
BuiltInAtomicType	getPrimitiveType() Determine the primitive type of the value.
void	setDoubleValue(DoubleValue value) Set the equivalent double value

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

asString, codepointEquals, containsSurrogatePairs, contract, diagnosticDisplay, effectiveBooleanValue, equals, expand, getPrimitiveStringValue, getSchemaComparable, getStringLength, getStringLength, getStringLengthUpperBound, getUnicodeString, getXPathComparable, hashCode, isIdentical, isKnownToContainNoSurrogates, isZeroLength, iterateCharacters, makeStringValue, setContainsNoSurrogates, setStringValueCS, toString

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

asAtomic, checkPermittedContents, getCanonicalLexicalRepresentation, getCardinality, getComponent, getItemType, getStringValue, getStringValueCS, head, identityHashCode, isIdentical, isNaN, itemAt, iterate, iterator, process, setTypeLabel

Methods inherited from class net.sf.saxon.om.AbstractItem

getLength, reduce, subsequence

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface net.sf.saxon.om.AtomicSequence

getLength

Methods inherited from interface net.sf.saxon.om.GroundedValue

reduce, subsequence

Field Detail

ZERO_LENGTH_UNTYPED

public static final UntypedAtomicValue ZERO_LENGTH_UNTYPED

Constructor Detail

UntypedAtomicValue

public UntypedAtomicValue(CharSequence value)

Constructor

Parameters:

value - the String value. Null is taken as equivalent to "".

Method Detail

copyAsSubType

public AtomicValue copyAsSubType(AtomicType typeLabel)

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

Overrides:

copyAsSubType in class StringValue

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 StringValue

Returns:

the primitive type

compareTo

public int compareTo(AtomicValue other,
            StringCollator collator,
            XPathContext context)

Compare an untypedAtomic value with another value, using a given collator to perform any string comparisons. This works by converting the untypedAtomic value to the type of the other operand, which is the correct behavior for operators like "=" and "!=", but not for "eq" and "ne": in the latter case, the untypedAtomic value is converted to a string and this method is therefore not used.

Parameters:

other - the value to compare this value with

collator - the collation to be used for comparing strings

context - the XPath dynamic context

Returns:

-1 if the this value is less than the other, 0 if they are equal, +1 if this value is greater.

Throws:

ClassCastException - if the value cannot be cast to the type of the other operand

getDoubleValueIfKnown

public DoubleValue getDoubleValueIfKnown()

Get the result of converting this untyped atomic value to a double, if this is already known.

Returns:

the equivalent double value, if it has already been computed, or null if it is not known

setDoubleValue

public void setDoubleValue(DoubleValue value)

Set the equivalent double value

Parameters:

value - the DoubleValue that is equivalent to this untyped atomic value