Class AnyURIValue

All Implemented Interfaces:
Serializable, PullEvent, SequenceIterable, GroundedValue, Item, ValueRepresentation, ConversionResult

public final class AnyURIValue extends StringValue
An XPath value of type xs:anyURI.

This is implemented as a subtype of StringValue even though xs:anyURI is not a subtype of xs:string in the XPath type hierarchy. This enables type promotion from URI to String to happen automatically in most cases where it is appropriate.

This implementation of xs:anyURI allows any string to be contained in the value space. It is possible to validate that the string is a "valid URI" in the sense of XML Schema Part 2 (which refers to the XLink specification and to RFC 2396); however, this validation is optional, and is not carried out by default. In particular, there is no constraint that namespace URIs, collation URIs, and the like should be valid URIs. However, casting from strings to xs:anyURI does invoke validation.

See Also:
  • Field Details

    • EMPTY_URI

      public static final AnyURIValue EMPTY_URI
  • Constructor Details

    • AnyURIValue

      public AnyURIValue(CharSequence value)
      Constructor
      Parameters:
      value - the String value. Null is taken as equivalent to "". This constructor does not check that the value is a valid anyURI instance.
    • AnyURIValue

      public AnyURIValue(CharSequence value, AtomicType type)
      Constructor for a user-defined subtype of anyURI
      Parameters:
      value - the String value. Null is taken as equivalent to "".
      type - a user-defined subtype of anyURI. It is the caller's responsibility to ensure that this is actually a subtype of anyURI, and that the value conforms to the definition of this type.
  • Method Details

    • copyAsSubType

      public AtomicValue copyAsSubType(AtomicType typeLabel)
      Create a copy of this atomic value, with a different type label
      Overrides:
      copyAsSubType in class StringValue
      Parameters:
      typeLabel - the type label of the new copy. The caller is responsible for checking that the value actually conforms to this type.
      Returns:
      the copied value
    • isValidURI

      public static boolean isValidURI(CharSequence value)
      Check whether a string consititutes a valid URI
      Parameters:
      value - the string to be tested
      Returns:
      true if the string is a valid URI
    • getPrimitiveType

      public BuiltInAtomicType getPrimitiveType()
      Description copied from class: StringValue
      Determine the primitive type of the value. This delivers the same answer as getItemType().getPrimitiveItemType(). The primitive types are the 19 primitive types of XML Schema, plus xs:integer, xs:dayTimeDuration and xs:yearMonthDuration, and xs:untypedAtomic. For external objects, the result is AnyAtomicType.
      Overrides:
      getPrimitiveType in class StringValue
      Returns:
      the primitive type
    • convertPrimitive

      public ConversionResult convertPrimitive(BuiltInAtomicType requiredType, boolean validate, XPathContext context)
      Convert to target data type
      Overrides:
      convertPrimitive in class StringValue
      Parameters:
      requiredType - integer code representing the item type required
      validate - true if validation is required. If set to false, the caller guarantees that the value is valid for the target data type, and that further validation is therefore not required. Note that a validation failure may be reported even if validation was not requested.
      context - the XPath dynamic evaluation context
      Returns:
      the result of the conversion, or an ErrorValue