net.sf.saxon.type
Class AnyItemType

java.lang.Object
  net.sf.saxon.type.AnyItemType

All Implemented Interfaces:

ItemType, java.io.Serializable

public class AnyItemType

extends java.lang.Object

implements ItemType, java.io.Serializable

An implementation of ItemType that matches any item (node or atomic value)

See Also:

Serialized Form

Method Summary

AtomicType	getAtomizedItemType() Get the item type of the atomic values that will be produced when an item of this type is atomized
static AnyItemType	getInstance() Factory method to get the singleton instance
ItemType	getPrimitiveItemType() Get the primitive item type corresponding to this item type.
int	getPrimitiveType() Get the primitive type corresponding to this item type.
ItemType	getSuperType(TypeHierarchy th) Get the type from which this item type is derived by restriction.
int	hashCode() Returns a hash code value for the object.
boolean	isAtomicType() Determine whether this item type is atomic (that is, whether it can ONLY match atomic values)
boolean	matchesItem(Item item, XPathContext context, boolean allowURIPromotion) Test whether a given item conforms to this type
java.lang.String	toString()
java.lang.String	toString(NamePool pool) Produce a representation of this type name for use in error messages.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static AnyItemType getInstance()

Factory method to get the singleton instance

isAtomicType

public boolean isAtomicType()

Determine whether this item type is atomic (that is, whether it can ONLY match atomic values)

Specified by:

isAtomicType in interface ItemType

Returns:

false: this type can match nodes or atomic values

matchesItem

public boolean matchesItem(Item item,
                           XPathContext context,
                           boolean allowURIPromotion)

Test whether a given item conforms to this type

Specified by:

matchesItem in interface ItemType

Parameters:

item - The item to be tested

context -

allowURIPromotion -

Returns:

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

getSuperType

public ItemType getSuperType(TypeHierarchy th)

Description copied from interface: ItemType

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.

Specified by:

getSuperType in interface ItemType

Parameters:

th -

Returns:

the supertype, or null if this type is item()

getPrimitiveItemType

public 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.

Specified by:

getPrimitiveItemType in interface ItemType

getPrimitiveType

public int getPrimitiveType()

Description copied from interface: ItemType

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.

Specified by:

getPrimitiveType in interface ItemType

getAtomizedItemType

public AtomicType 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

toString

public java.lang.String toString()

toString

public java.lang.String toString(NamePool pool)

Description copied from interface: ItemType

Produce a representation of this type name for use in error messages. Where this is a QName, it will use conventional prefixes

Specified by:

toString in interface ItemType

hashCode

public int hashCode()

Returns a hash code value for the object.