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). Return false if this is a union type whose member types are not all known.
      • matches

        boolean matches(Item item,
                      TypeHierarchy th)
                        throws XPathException
        Test whether a given item conforms to this type
        Parameters:
        item - The item to be tested
        th - The type hierarchy cache. Currently used only when matching function items.
        Returns:
        true if the item is an instance of this type; false otherwise
        Throws:
        XPathException
      • 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
      • getUType

        UType getUType()
        Get the corresponding UType. A UType is a union of primitive item types.
        Returns:
        the smallest UType that subsumes this item 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

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