Class AnyURIValue

All Implemented Interfaces:
Serializable, Expression, Item, ValueRepresentation

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 "".
  • Method Details

    • isValidURI

      public static boolean isValidURI(CharSequence value)
      Check whether a string consititutes a valid URI
    • convertPrimitive

      public AtomicValue 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 -
      Returns:
      the result of the conversion, or an ErrorValue
    • getItemType

      public ItemType getItemType(TypeHierarchy th)
      Return the type of the expression
      Specified by:
      getItemType in interface Expression
      Overrides:
      getItemType in class StringValue
      Parameters:
      th -
      Returns:
      Type.ANY_URI_TYPE (always)
    • equals

      public boolean equals(Object other)
      Determine if two AnyURIValues are equal, according to XML Schema rules. (This method is not used for XPath comparisons, which are always under the control of a collation.)
      Overrides:
      equals in class StringValue
      Throws:
      ClassCastException - if the values are not comparable
    • convertToJava

      public Object convertToJava(Class target, XPathContext context) throws XPathException
      Convert to Java object (for passing to external functions)
      Overrides:
      convertToJava in class StringValue
      Parameters:
      target - the Java class to which conversion is required
      Returns:
      the result of the conversion
      Throws:
      XPathException - if conversion to this target type is not possible