Package net.sf.saxon.type
Interface ItemType
- All Superinterfaces:
Serializable
- All Known Subinterfaces:
AtomicType
- All Known Implementing Classes:
AnyChildNodePattern
,AnyItemType
,AnyNodeTest
,BuiltInAtomicType
,CombinedNodeTest
,ContentTypeTest
,DocumentNodeTest
,ExternalObjectType
,IdrefTest
,LocalNameTest
,NamespaceTest
,NameTest
,NodeKindTest
,NodeTest
,NoNodeTest
,SubstitutionGroupTest
ItemType is an interface that allows testing of whether an Item conforms to an
expected type. ItemType represents the types in the type hierarchy in the XPath model,
as distinct from the schema model: an item type is either item() (matches everything),
a node type (matches nodes), an atomic type (matches atomic values), or empty()
(matches nothing). Atomic types, represented by the class AtomicType, are also
instances of SimpleType in the schema type heirarchy. Node Types, represented by
the class NodeTest, are also Patterns as used in XSLT.
- See Also:
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Method Summary
Modifier and TypeMethodDescriptionGet the item type of the atomic values that will be produced when an item of this type is atomizedGet the primitive item type corresponding to this item type.int
Get the primitive type corresponding to this item type.Get the type from which this item type is derived by restriction.boolean
Determine whether this item type is atomic (that is, whether it can ONLY match atomic values)boolean
matchesItem
(Item item, boolean allowURIPromotion, Configuration config) Test whether a given item conforms to this typeProduce a representation of this type name for use in error messages.
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Method Details
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isAtomicType
boolean isAtomicType()Determine whether this item type is atomic (that is, whether it can ONLY match atomic values)- Returns:
- true if this is ANY_ATOMIC_TYPE or a subtype thereof
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matchesItem
Test whether a given item conforms to this type- Parameters:
item
- The item to be testedallowURIPromotion
-config
-- Returns:
- true if the item is an instance of this type; false otherwise
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getSuperType
Get the type from which this item type is derived by restriction. This is the supertype in the XPath type heirarchy, as distinct from the Schema base type: this means that the supertype of xs:boolean is xdt:anyAtomicType, whose supertype is item() (rather than xs:anySimpleType).In fact the concept of "supertype" is not really well-defined, because the types form a lattice rather than a hierarchy. The only real requirement on this function is that it returns a type that strictly subsumes this type, ideally as narrowly as possible.
- Parameters:
th
-- Returns:
- the supertype, or null if this type is item()
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getPrimitiveItemType
ItemType getPrimitiveItemType()Get the primitive item type corresponding to this item type. For item(), this is Type.ITEM. For node(), it is Type.NODE. For specific node kinds, it is the value representing the node kind, for example Type.ELEMENT. For anyAtomicValue it is Type.ATOMIC_VALUE. For numeric it is Type.NUMBER. For other atomic types it is the primitive type as defined in XML Schema, except that INTEGER is considered to be a primitive type. -
getPrimitiveType
int getPrimitiveType()Get the primitive type corresponding to this item type. For item(), this is Type.ITEM. For node(), it is Type.NODE. For specific node kinds, it is the value representing the node kind, for example Type.ELEMENT. For anyAtomicValue it is Type.ATOMIC_VALUE. For numeric it is Type.NUMBER. For other atomic types it is the primitive type as defined in XML Schema, except that INTEGER is considered to be a primitive type. -
toString
Produce a representation of this type name for use in error messages. Where this is a QName, it will use conventional prefixes -
getAtomizedItemType
AtomicType getAtomizedItemType()Get the item type of the atomic values that will be produced when an item of this type is atomized
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