net.sf.saxon.s9api
Class QName

java.lang.Object
  net.sf.saxon.s9api.QName

public class QName
extends Object

The QName class represents an instance of xs:QName, as defined in the XPath 2.0 data model. Internally, it has three components, a namespace URI, a local name, and a prefix. The prefix is intended to be used only when converting the value back to a string.

This class also defines a number of QName-valued constants relating to built-in types in XML Schema

A QName is immutable.

Note that a QName is not itself an XdmItem in this model; however it can be wrapped in an XdmItem.

Field Summary

static QName	XS_ANY_ATOMIC_TYPE QName denoting the schema type xs:anyAtomicType
static QName	XS_ANY_URI QName denoting the schema type xs:anyURI
static QName	XS_BASE64_BINARY QName denoting the schema type xs:base64Binary
static QName	XS_BOOLEAN QName denoting the schema type xs:boolean
static QName	XS_BYTE QName denoting the schema type xs:byte
static QName	XS_DATE QName denoting the schema type xs:date
static QName	XS_DATE_TIME QName denoting the schema type xs:dateTime
static QName	XS_DAY_TIME_DURATION QName denoting the schema type xs:dayTimeDuration
static QName	XS_DECIMAL QName denoting the schema type xs:decimal
static QName	XS_DOUBLE QName denoting the schema type xs:double
static QName	XS_DURATION QName denoting the schema type xs:duration
static QName	XS_ENTITIES QName denoting the schema type xs:ENTITIES
static QName	XS_ENTITY QName denoting the schema type xs:ENTITY
static QName	XS_FLOAT QName denoting the schema type xs:float
static QName	XS_G_DAY QName denoting the schema type xs:gDay
static QName	XS_G_MONTH QName denoting the schema type xs:gMonth
static QName	XS_G_MONTH_DAY QName denoting the schema type xs:gMonthDay
static QName	XS_G_YEAR QName denoting the schema type xs:gYear
static QName	XS_G_YEAR_MONTH QName denoting the schema type xs:gYearMonth
static QName	XS_HEX_BINARY QName denoting the schema type xs:hexBinary
static QName	XS_ID QName denoting the schema type xs:ID
static QName	XS_IDREF QName denoting the schema type xs:IDREF
static QName	XS_IDREFS QName denoting the schema type xs:IDREFS
static QName	XS_INT QName denoting the schema type xs:int
static QName	XS_INTEGER QName denoting the schema type xs:integer
static QName	XS_LANGUAGE QName denoting the schema type xs:language
static QName	XS_LONG QName denoting the schema type xs:long
static QName	XS_NAME QName denoting the schema type xs:Name
static QName	XS_NCNAME QName denoting the schema type xs:NCName
static QName	XS_NEGATIVE_INTEGER QName denoting the schema type xs:negativeInteger
static QName	XS_NMTOKEN QName denoting the schema type xs:NMTOKEN
static QName	XS_NMTOKENS QName denoting the schema type xs:NMTOKENS
static QName	XS_NON_NEGATIVE_INTEGER QName denoting the schema type xs:nonNegativeInteger
static QName	XS_NON_POSITIVE_INTEGER QName denoting the schema type xs:nonPositiveInteger
static QName	XS_NORMALIZED_STRING QName denoting the schema type xs:normalizedString
static QName	XS_NOTATION QName denoting the schema type xs:NOTATION
static QName	XS_POSITIVE_INTEGER QName denoting the schema type xs:positiveInteger
static QName	XS_QNAME QName denoting the schema type xs:QName
static QName	XS_SHORT QName denoting the schema type xs:short
static QName	XS_STRING QName denoting the schema type xs:string
static QName	XS_TIME QName denoting the schema type xs:time
static QName	XS_TOKEN QName denoting the schema type xs:token
static QName	XS_UNSIGNED_BYTE QName denoting the schema type xs:unsignedByte
static QName	XS_UNSIGNED_INT QName denoting the schema type xs:unsignedInt
static QName	XS_UNSIGNED_LONG QName denoting the schema type xs:unsignedLong
static QName	XS_UNSIGNED_SHORT QName denoting the schema type xs:unsignedShort
static QName	XS_UNTYPED QName denoting the schema type xs:untyped
static QName	XS_UNTYPED_ATOMIC QName denoting the schema type xs:untypedAtomic
static QName	XS_YEAR_MONTH_DURATION QName denoting the schema type xs:yearMonthDuration

Constructor Summary

QName(QName qName)
Construct a QName from a JAXP QName object

QName(String localName)
Construct a QName from a localName alone.

QName(String uri, String lexical)
Construct a QName using a namespace URI and a lexical representation.

QName(String prefix, String uri, String localName)
Construct a QName using a namespace prefix, a namespace URI, and a local name (in that order).

QName(String lexicalQName, XdmNode element)
Construct a QName from a lexical QName, supplying an element node whose in-scope namespaces are to be used to resolve any prefix contained in the QName.

Method Summary

boolean	equals(Object other) Test whether two QNames are equal.
static QName	fromClarkName(String expandedName) Factory method to construct a QName from a string containing the expanded QName in Clark notation, that is, {uri}local The prefix part of the QName will be set to an empty string.
String	getClarkName() The expanded name, as a string using the notation devised by James Clark.
String	getLocalName() The local part of the QName
String	getNamespaceURI() The namespace URI of the QName.
String	getPrefix() Get the prefix of the QName.
int	hashCode() Get a hash code for the QName, to support equality matching.
boolean	isValid(Processor processor) Validate the QName against the XML 1.0 or XML 1.1 rules for valid names.
String	toString() Convert the value to a string.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Field Detail

XS_STRING

public static final QName XS_STRING

QName denoting the schema type xs:string

XS_BOOLEAN

public static final QName XS_BOOLEAN

QName denoting the schema type xs:boolean

XS_DECIMAL

public static final QName XS_DECIMAL

QName denoting the schema type xs:decimal

XS_FLOAT

public static final QName XS_FLOAT

QName denoting the schema type xs:float

XS_DOUBLE

public static final QName XS_DOUBLE

QName denoting the schema type xs:double

XS_DURATION

public static final QName XS_DURATION

QName denoting the schema type xs:duration

XS_DATE_TIME

public static final QName XS_DATE_TIME

QName denoting the schema type xs:dateTime

XS_TIME

public static final QName XS_TIME

QName denoting the schema type xs:time

XS_DATE

public static final QName XS_DATE

QName denoting the schema type xs:date

XS_G_YEAR_MONTH

public static final QName XS_G_YEAR_MONTH

QName denoting the schema type xs:gYearMonth

XS_G_YEAR

public static final QName XS_G_YEAR

QName denoting the schema type xs:gYear

XS_G_MONTH_DAY

public static final QName XS_G_MONTH_DAY

QName denoting the schema type xs:gMonthDay

XS_G_DAY

public static final QName XS_G_DAY

QName denoting the schema type xs:gDay

XS_G_MONTH

public static final QName XS_G_MONTH

QName denoting the schema type xs:gMonth

XS_HEX_BINARY

public static final QName XS_HEX_BINARY

QName denoting the schema type xs:hexBinary

XS_BASE64_BINARY

public static final QName XS_BASE64_BINARY

QName denoting the schema type xs:base64Binary

XS_ANY_URI

public static final QName XS_ANY_URI

QName denoting the schema type xs:anyURI

XS_QNAME

public static final QName XS_QNAME

QName denoting the schema type xs:QName

XS_NOTATION

public static final QName XS_NOTATION

QName denoting the schema type xs:NOTATION

XS_INTEGER

public static final QName XS_INTEGER

QName denoting the schema type xs:integer

XS_NON_POSITIVE_INTEGER

public static final QName XS_NON_POSITIVE_INTEGER

QName denoting the schema type xs:nonPositiveInteger

XS_NEGATIVE_INTEGER

public static final QName XS_NEGATIVE_INTEGER

QName denoting the schema type xs:negativeInteger

XS_LONG

public static final QName XS_LONG

QName denoting the schema type xs:long

XS_INT

public static final QName XS_INT

QName denoting the schema type xs:int

XS_SHORT

public static final QName XS_SHORT

QName denoting the schema type xs:short

XS_BYTE

public static final QName XS_BYTE

QName denoting the schema type xs:byte

XS_NON_NEGATIVE_INTEGER

public static final QName XS_NON_NEGATIVE_INTEGER

QName denoting the schema type xs:nonNegativeInteger

XS_POSITIVE_INTEGER

public static final QName XS_POSITIVE_INTEGER

QName denoting the schema type xs:positiveInteger

XS_UNSIGNED_LONG

public static final QName XS_UNSIGNED_LONG

QName denoting the schema type xs:unsignedLong

XS_UNSIGNED_INT

public static final QName XS_UNSIGNED_INT

QName denoting the schema type xs:unsignedInt

XS_UNSIGNED_SHORT

public static final QName XS_UNSIGNED_SHORT

QName denoting the schema type xs:unsignedShort

XS_UNSIGNED_BYTE

public static final QName XS_UNSIGNED_BYTE

QName denoting the schema type xs:unsignedByte

XS_NORMALIZED_STRING

public static final QName XS_NORMALIZED_STRING

QName denoting the schema type xs:normalizedString

XS_TOKEN

public static final QName XS_TOKEN

QName denoting the schema type xs:token

XS_LANGUAGE

public static final QName XS_LANGUAGE

QName denoting the schema type xs:language

XS_NMTOKEN

public static final QName XS_NMTOKEN

QName denoting the schema type xs:NMTOKEN

XS_NMTOKENS

public static final QName XS_NMTOKENS

QName denoting the schema type xs:NMTOKENS

XS_NAME

public static final QName XS_NAME

QName denoting the schema type xs:Name

XS_NCNAME

public static final QName XS_NCNAME

QName denoting the schema type xs:NCName

XS_ID

public static final QName XS_ID

QName denoting the schema type xs:ID

XS_IDREF

public static final QName XS_IDREF

QName denoting the schema type xs:IDREF

XS_IDREFS

public static final QName XS_IDREFS

QName denoting the schema type xs:IDREFS

XS_ENTITY

public static final QName XS_ENTITY

QName denoting the schema type xs:ENTITY

XS_ENTITIES

public static final QName XS_ENTITIES

QName denoting the schema type xs:ENTITIES

XS_UNTYPED

public static final QName XS_UNTYPED

QName denoting the schema type xs:untyped

XS_UNTYPED_ATOMIC

public static final QName XS_UNTYPED_ATOMIC

QName denoting the schema type xs:untypedAtomic

XS_ANY_ATOMIC_TYPE

public static final QName XS_ANY_ATOMIC_TYPE

QName denoting the schema type xs:anyAtomicType

XS_YEAR_MONTH_DURATION

public static final QName XS_YEAR_MONTH_DURATION

QName denoting the schema type xs:yearMonthDuration

XS_DAY_TIME_DURATION

public static final QName XS_DAY_TIME_DURATION

QName denoting the schema type xs:dayTimeDuration

Constructor Detail

QName

public QName(String prefix,
             String uri,
             String localName)

Construct a QName using a namespace prefix, a namespace URI, and a local name (in that order).

This constructor does not check that the components of the QName are lexically valid.

Parameters:

prefix - The prefix of the name. Use either the string "" or null for names that have no prefix (that is, they are in the default namespace)

uri - The namespace URI. Use either the string "" or null for names that are not in any namespace.

localName - The local part of the name

QName

public QName(String uri,
             String lexical)

Construct a QName using a namespace URI and a lexical representation. The lexical representation may be a local name on its own, or it may be in the form prefix:local-name.

This constructor does not check that the components of the QName are lexically valid.

Parameters:

uri - The namespace URI. Use either the string "" or null for names that are not in any namespace.

lexical - Either the local part of the name, or the prefix and local part in the format prefix:local

QName

public QName(String localName)

Construct a QName from a localName alone. The localName must not contain a colon. The resulting QName represents a name in no namespace (which therefore has no prefix)

Parameters:

localName - The local name. This must be a valid NCName, in particular it must contain no colon

QName

public QName(String lexicalQName,
             XdmNode element)

Construct a QName from a lexical QName, supplying an element node whose in-scope namespaces are to be used to resolve any prefix contained in the QName.

This constructor checks that the components of the QName are lexically valid.

If the lexical QName has no prefix, the name is considered to be in the default namespace, as defined by xmlns="...".

If the prefix of the lexical QName is not in scope, returns null.

Parameters:

lexicalQName - The lexical QName, in the form prefix:local or simply local.

element - The element node whose in-scope namespaces are to be used to resolve the prefix part of the lexical QName.

Throws:

IllegalArgumentException - If the prefix of the lexical QName is not in scope or if the lexical QName is invalid (for example, if it contains invalid characters)

QName

public QName(QName qName)

Construct a QName from a JAXP QName object

Parameters:

qName - the JAXP QName object

Method Detail

fromClarkName

public static QName fromClarkName(String expandedName)

Factory method to construct a QName from a string containing the expanded QName in Clark notation, that is, {uri}local

The prefix part of the QName will be set to an empty string.

Parameters:

expandedName - The URI in Clark notation: {uri}local if the name is in a namespace, or simply local if not.

Returns:

the QName corresponding to the supplied name in Clark notation. This will always have an empty prefix.

isValid

public boolean isValid(Processor processor)

Validate the QName against the XML 1.0 or XML 1.1 rules for valid names.

Parameters:

processor - The Processor in which the name is to be validated. This determines whether the XML 1.0 or XML 1.1 rules for forming names are used.

Returns:

true if the name is valid, false if not

getPrefix

public String getPrefix()

Get the prefix of the QName. This plays no role in operations such as comparison of QNames for equality, but is retained (as specified in XPath) so that a string representation can be reconstructed.

Returns the zero-length string in the case of a QName that has no prefix.

Returns:

the prefix part of the QName, or "" if the name has no known prefix

getNamespaceURI

public String getNamespaceURI()

The namespace URI of the QName. Returns "" (the zero-length string) if the QName is not in a namespace.

Returns:

the namespace part of the QName, or "" for a name in no namespace

getLocalName

public String getLocalName()

The local part of the QName

Returns:

the local part of the QName

getClarkName

public String getClarkName()

The expanded name, as a string using the notation devised by James Clark. If the name is in a namespace, the resulting string takes the form {uri}local. Otherwise, the value is the local part of the name.

Returns:

the name in Clark notation. If the name is not in a namespace, returns the local part of the name. Otherwise returns the concatenation of "{", the namespace part of the QName, "}", and the local part of the QName.

toString

public String toString()

Convert the value to a string. The resulting string is the lexical form of the QName, using the original prefix if there was one.

Overrides:

toString in class Object

hashCode

public int hashCode()

Get a hash code for the QName, to support equality matching. This supports the semantics of equality, which considers only the namespace URI and local name, and not the prefix.

Overrides:

hashCode in class Object

Returns:

a hashCode for the QName

equals

public boolean equals(Object other)

Test whether two QNames are equal. This supports the semantics of equality, which considers only the namespace URI and local name, and not the prefix.

Overrides:

equals in class Object

Returns:

true if the namespace URIs are equal and the local parts are equal, when compared character-by-character.