net.sf.saxon.value
public final class AnyURIValue extends StringValue
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.
Field Summary | |
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static AnyURIValue | EMPTY_URI |
Constructor Summary | |
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AnyURIValue(CharSequence value)
Constructor | |
AnyURIValue(CharSequence value, AtomicType type)
Constructor for a user-defined subtype of anyURI |
Method Summary | |
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ConversionResult | convertPrimitive(BuiltInAtomicType requiredType, boolean validate, XPathContext context)
Convert to target data type |
AtomicValue | copyAsSubType(AtomicType typeLabel)
Create a copy of this atomic value, with a different type label
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BuiltInAtomicType | getPrimitiveType() |
static boolean | isValidURI(CharSequence value)
Check whether a string consititutes a valid URI |
Parameters: value the String value. Null is taken as equivalent to "". This constructor does not check that the value is a valid anyURI instance.
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.
Parameters: requiredType integer code representing the item type required context the XPath dynamic evaluation context
Returns: the result of the conversion, or an ErrorValue
Parameters: typeLabel the type label of the new copy. The caller is responsible for checking that the value actually conforms to this type.
Parameters: value the string to be tested
Returns: true if the string is a valid URI