Package net.sf.saxon.type

Class LocalUnionType

java.lang.Object

net.sf.saxon.type.LocalUnionType

All Implemented Interfaces:

CastingTarget, HyperType, ItemType, PlainType, UnionType

Direct Known Subclasses:

NumericType

public class LocalUnionType
extends Object
implements PlainType, UnionType

A class that represents a union type declared locally, for example using the (Saxon-extension) item-type syntax union(a,b,c), or internally in Java code.

Constructor Summary

Constructors

Constructor	Description
LocalUnionType(List<AtomicType> memberTypes)	Creates a new Union type.
LocalUnionType(AtomicType... memberTypes)

Method Summary

Modifier and Type	Method	Description
ValidationFailure	checkAgainstFacets(AtomicValue value, ConversionRules rules)	Validate an atomic value, which is known to be an instance of one of the member types of the union, against any facets (pattern facets or enumeration facets) defined at the level of the union itself.
boolean	containsListType()	Ask whether this union type includes any list types among its members
PlainType	getAtomizedItemType()	Get the item type of the atomic values that will be produced when an item of this type is atomized
String	getBasicAlphaCode()	Get an alphabetic code representing the type, or at any rate, the nearest built-in type from which this type is derived.
double	getDefaultPriority()	Get the default priority when this ItemType is used as an XSLT pattern
String	getDescription()
Genre	getGenre()	Get the genre of this item
List<? extends AtomicType>	getMemberTypes()
List<? extends PlainType>	getPlainMemberTypes()	Get the list of plain types that are subsumed by this type
AtomicType	getPrimitiveItemType()	Method defined in ItemType: get a primitive supertype in the ItemType type hierarchy
int	getPrimitiveType()	Method defined in ItemType: get a primitive supertype in the ItemType type hierarchy
SequenceType	getResultTypeOfCast()	Get the SequenceType that most accurately describes the result of casting a value to this union type
AtomicValue	getTypedValue(UnicodeString value, NamespaceResolver resolver, ConversionRules rules)	Get the typed value corresponding to a given string value, assuming it is valid against this type
StructuredQName	getTypeName()	Get the name of this type as a structured QName
UType	getUType()	Get the corresponding UType.
boolean	isAtomicType()	Ask whether this Simple Type is an atomic type
boolean	isAtomizable(TypeHierarchy th)	Ask whether values of this type are atomizable
boolean	isBuiltInType()	Determine whether this is a built-in type or a user-defined type
boolean	isIdRefType()	Ask whether this type is an IDREF or IDREFS type.
boolean	isIdType()	Ask whether this type is an ID type.
boolean	isListType()	Determine whether this is a list type
boolean	isNamespaceSensitive()	Test whether this type is namespace sensitive, that is, if a namespace context is needed to translate between the lexical space and the value space.
boolean	isPlainType()	Ask whether this Union type is a "plain type", defined as a union type whose member types are all atomic types or plain unions.
boolean	isUnionType()	Return true if this type is a union type (that is, if its variety is union)
boolean	matches(Item item, TypeHierarchy th)	Test whether a given item conforms to this type
String	toExportString()	Return a string representation of this ItemType suitable for use in stylesheet export files.
String	toString()	Produce a string representation of the type name.
ValidationFailure	validateContent(UnicodeString value, NamespaceResolver nsResolver, ConversionRules rules)	Check whether a given input string is valid according to this SimpleType

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface net.sf.saxon.type.ItemType

getFullAlphaCode, getNormalizedDefaultPriority

Methods inherited from interface net.sf.saxon.type.UnionType

explainMismatch, getStructuredQName

Constructor Details

LocalUnionType

public LocalUnionType(List<AtomicType> memberTypes)

Creates a new Union type.

Parameters:

memberTypes - the atomic member types of the union

LocalUnionType

public LocalUnionType(AtomicType... memberTypes)

Method Details

getGenre

public Genre getGenre()

Get the genre of this item

Specified by:

getGenre in interface ItemType

Returns:

the genre

getTypeName

public StructuredQName getTypeName()

Description copied from interface: PlainType

Get the name of this type as a structured QName

Specified by:

getTypeName in interface PlainType

Specified by:

getTypeName in interface UnionType

Returns:

the name of this type. If the type is anonymous, an internally-generated type name is returned

getDescription

public String getDescription()

Specified by:

getDescription in interface UnionType

getMemberTypes

public List<? extends AtomicType> getMemberTypes()

isAtomicType

public boolean isAtomicType()

Ask whether this Simple Type is an atomic type

Specified by:

isAtomicType in interface ItemType

Returns:

false, this is not an atomic type

containsListType

public boolean containsListType()

Ask whether this union type includes any list types among its members

Specified by:

containsListType in interface UnionType

Returns:

true of one of the member types is a list type

isPlainType

public boolean isPlainType()

Ask whether this Union type is a "plain type", defined as a union type whose member types are all atomic types or plain unions. That is, it disallows unions that are derived by restriction from another union. The significance of this is that an atomic value will never match a non-plain union type

Specified by:

isPlainType in interface ItemType

Returns:

true if this is ANY_ATOMIC_TYPE or a subtype thereof, or a "plain" union type (that is, unions of atomic types that impose no further restrictions). Return false if this is a union type whose member types are not all known.

getResultTypeOfCast

public SequenceType getResultTypeOfCast()

Get the SequenceType that most accurately describes the result of casting a value to this union type

Specified by:

getResultTypeOfCast in interface UnionType

Returns:

the most precise SequenceType for the result of casting

isIdType

public boolean isIdType()

Ask whether this type is an ID type. This is defined to be any simple type who typed value may contain atomic values of type xs:ID: that is, it includes types derived from ID by restriction, list, or union. Note that for a node to be treated as an ID in XSD 1.0, its typed value must be a *single* atomic value of type ID; the type of the node, however, can still allow a list or union. This changes in XSD 1.1, where a list of IDs is allowed.

isIdRefType

public boolean isIdRefType()

Ask whether this type is an IDREF or IDREFS type. This is defined to be any simple type who typed value may contain atomic values of type xs:IDREF: that is, it includes types derived from IDREF or IDREFS by restriction, list, or union

isBuiltInType

public boolean isBuiltInType()

Determine whether this is a built-in type or a user-defined type

isListType

public boolean isListType()

Determine whether this is a list type

isUnionType

public boolean isUnionType()

Return true if this type is a union type (that is, if its variety is union)

Returns:

true for a union type

getUType

public UType getUType()

Get the corresponding UType. A UType is a union of primitive item types.

Specified by:

getUType in interface ItemType

Returns:

the smallest UType that subsumes this item type

getBasicAlphaCode

public String getBasicAlphaCode()

Get an alphabetic code representing the type, or at any rate, the nearest built-in type from which this type is derived. The codes are designed so that for any two built-in types A and B, alphaCode(A) is a prefix of alphaCode(B) if and only if A is a supertype of B.

Specified by:

getBasicAlphaCode in interface ItemType

Returns:

the alphacode for the nearest containing built-in type

isNamespaceSensitive

public boolean isNamespaceSensitive()

Test whether this type is namespace sensitive, that is, if a namespace context is needed to translate between the lexical space and the value space. This is true for types derived from, or containing, QNames and NOTATIONs

Specified by:

isNamespaceSensitive in interface HyperType

Returns:

true if any of the member types is namespace-sensitive, or if namespace sensitivity cannot be determined because there are components missing from the schema.

validateContent

public ValidationFailure validateContent(UnicodeString value,
 NamespaceResolver nsResolver,
 ConversionRules rules)

Check whether a given input string is valid according to this SimpleType

Parameters:

value - the input string to be checked

nsResolver - a namespace resolver used to resolve namespace prefixes if the type is namespace sensitive. The value supplied may be null; in this case any namespace-sensitive content will throw an UnsupportedOperationException.

rules - the configuration-wide conversion rules

Returns:

null if validation succeeds; return a ValidationFailure describing the validation failure if validation fails

Throws:

UnsupportedOperationException - if the type is namespace-sensitive and no namespace resolver is supplied

checkAgainstFacets

public ValidationFailure checkAgainstFacets(AtomicValue value,
 ConversionRules rules)

Validate an atomic value, which is known to be an instance of one of the member types of the union, against any facets (pattern facets or enumeration facets) defined at the level of the union itself.

Specified by:

checkAgainstFacets in interface UnionType

Parameters:

value - the Atomic Value to be checked. This must be an instance of a member type of the union

rules - the ConversionRules for the Configuration

Returns:

a ValidationFailure if the value is not valid; null if it is valid.

getTypedValue

public AtomicValue getTypedValue(UnicodeString value,
 NamespaceResolver resolver,
 ConversionRules rules)
                          throws ValidationException

Description copied from interface: UnionType

Get the typed value corresponding to a given string value, assuming it is valid against this type

Specified by:

getTypedValue in interface UnionType

Parameters:

value - the string value

resolver - a namespace resolver used to resolve any namespace prefixes appearing in the content of values. Can supply null, in which case any namespace-sensitive content will be rejected.

rules - the conversion rules from the configuration

Returns:

the atomic sequence comprising the typed value. The objects returned by this SequenceIterator will all be of type AtomicValue,

Throws:

ValidationException - if the supplied value is not in the lexical space of the data type

matches

public boolean matches(Item item,
 TypeHierarchy th)

Test whether a given item conforms to this type

Specified by:

matches in interface ItemType

Specified by:

matches in interface PlainType

Parameters:

item - The item to be tested

th - The type hierarchy

Returns:

true if the item is an instance of this type; false otherwise

getPrimitiveItemType

public AtomicType getPrimitiveItemType()

Method defined in ItemType: get a primitive supertype in the ItemType type hierarchy

Specified by:

getPrimitiveItemType in interface ItemType

Specified by:

getPrimitiveItemType in interface PlainType

Returns:

BuiltInAtomicType.ANY_ATOMIC

getPrimitiveType

public int getPrimitiveType()

Method defined in ItemType: get a primitive supertype in the ItemType type hierarchy

Specified by:

getPrimitiveType in interface ItemType

Returns:

StandardNames.XS_ANY_ATOMIC_TYPE

getAtomizedItemType

public PlainType getAtomizedItemType()

Description copied from interface: ItemType

Get the item type of the atomic values that will be produced when an item of this type is atomized

Specified by:

getAtomizedItemType in interface ItemType

Returns:

the best available item type of the atomic values that will be produced when an item of this type is atomized, or null if it is known that atomization will throw an error.

isAtomizable

public boolean isAtomizable(TypeHierarchy th)

Description copied from interface: ItemType

Ask whether values of this type are atomizable

Specified by:

isAtomizable in interface ItemType

Parameters:

th - the type hierarchy cache

Returns:

true if some or all instances of this type can be successfully atomized; false if no instances of this type can be atomized

getPlainMemberTypes

public List<? extends PlainType> getPlainMemberTypes()

Get the list of plain types that are subsumed by this type

Specified by:

getPlainMemberTypes in interface PlainType

Specified by:

getPlainMemberTypes in interface UnionType

Returns:

for an atomic type, the type itself; for a plain union type, the list of plain types in its transitive membership, in declaration order

getDefaultPriority

public double getDefaultPriority()

Get the default priority when this ItemType is used as an XSLT pattern

Specified by:

getDefaultPriority in interface ItemType

Returns:

the default priority. For a union type this is defined as the product of the default priorities of the member types. Because the priorities of member types are in the range 0 to 1, their product is also in the range 0 to 1.

toString

public String toString()

Produce a string representation of the type name. If the type is anonymous, an internally-allocated type name will be returned.

Overrides:

toString in class Object

Returns:

the name of the atomic type in the form Q{uri}local

toExportString

public String toExportString()

Description copied from interface: ItemType

Return a string representation of this ItemType suitable for use in stylesheet export files. This differs from the result of toString() in that it will not contain any references to anonymous types. Note that it may also use the Saxon extended syntax for union types and tuple types. The default implementation returns the result of calling toString().

Specified by:

toExportString in interface ItemType

Returns:

the string representation as an instance of the XPath SequenceType construct