net.sf.saxon.type

Interface ItemType

    • Method Detail

      • isAtomicType

        boolean isAtomicType()
        Determine whether this item type is an atomic type
        Returns:
        true if this is ANY_ATOMIC_TYPE or a subtype thereof
      • isPlainType

        boolean isPlainType()
        Determine whether this item type is a plain type (that is, whether it can ONLY match atomic values)
        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)
      • matches

        boolean matches(Item item,
                      XPathContext context)
        Test whether a given item conforms to this type
        Parameters:
        item - The item to be tested
        context - the XPath dynamic evaluation context
        Returns:
        true if the item is an instance of this type; false otherwise
      • matchesItem

        boolean matchesItem(Item item,
                          boolean allowURIPromotion,
                          Configuration config)
        Test whether a given item conforms to this type
        Parameters:
        item - The item to be tested
        allowURIPromotion - if a URI value is to be treated as a string
        config - the Saxon configuration
        Returns:
        true if the item is an instance of this type; false otherwise
      • getSuperType

        ItemType getSuperType(TypeHierarchy th)
        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 xs: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 - the type hierarchy cache
        Returns:
        the supertype, or null if this type is item()
      • 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 and union types 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, xs:dayTimeDuration, and xs:yearMonthDuration are considered to be primitive types.
        Returns:
        the corresponding 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 BuiltInAtomicType.ANY_ATOMIC. 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.
        Returns:
        the integer fingerprint of the corresponding primitive type
      • getAtomizedItemType

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

        boolean isAtomizable()
        Ask whether values of this type are atomizable
        Returns:
        true unless it is known that these items will be elements with element-only content, or function items, in which case return false
      • visitNamedSchemaComponents

        void visitNamedSchemaComponents(SchemaComponentVisitor visitor)
                                        throws XPathException
        Visit all the schema components used in this ItemType definition
        Parameters:
        visitor - the visitor class to be called when each component is visited
        Throws:
        XPathException - if an error occurs

Copyright (c) 2004-2014 Saxonica Limited. All rights reserved.