Class FixedAttribute

  • All Implemented Interfaces:
    java.io.Serializable, javax.xml.transform.SourceLocator, Container, Expression, TailCallReturner, InstructionInfoProvider

    public final class FixedAttribute
    extends SimpleNodeConstructor
    An instruction derived from an xsl:attribute element in stylesheet, or from an attribute constructor in XQuery. This version deals only with attributes whose name is known at compile time. It is also used for attributes of literal result elements. The value of the attribute is in general computed at run-time.
    See Also:
    Serialized Form
    • Constructor Detail

      • FixedAttribute

        public FixedAttribute​(int nameCode,
                              int validationAction,
                              SimpleType schemaType,
                              int annotation)
        Construct an Attribute instruction
        Parameters:
        nameCode - Represents the attribute name
        annotation - Integer code identifying the type named in the type attribute of the instruction - zero if the attribute was not present
    • Method Detail

      • getInstructionNameCode

        public int getInstructionNameCode()
        Get the name of this instruction (return 'xsl:attribute')
        Overrides:
        getInstructionNameCode in class Instruction
      • setRejectDuplicates

        public void setRejectDuplicates()
        Indicate that two attributes with the same name are not acceptable. (This option is set in XQuery, but not in XSLT)
      • setNoSpecialChars

        public void setNoSpecialChars()
        Indicate that the attribute value contains no special characters that might need escaping
      • setSelect

        public void setSelect​(Expression select,
                              Configuration config)
                       throws StaticError
        Set the expression defining the value of the attribute. If this is a constant, and if validation against a schema type was requested, the validation is done immediately.
        Overrides:
        setSelect in class SimpleNodeConstructor
        Parameters:
        select - The expression defining the content of the attribute
        config -
        Throws:
        StaticError - if the expression is a constant, and validation is requested, and the constant doesn't match the required type.
      • getCardinality

        public int getCardinality()
        Description copied from class: ComputedExpression
        Determine the static cardinality of the expression. This establishes how many items there will be in the result of the expression, at compile time (i.e., without actually evaluating the result.
        Specified by:
        getCardinality in interface Expression
        Overrides:
        getCardinality in class ComputedExpression
        Returns:
        one of the values Cardinality.ONE_OR_MORE, Cardinality.ZERO_OR_MORE, Cardinality.EXACTLY_ONE, Cardinality.ZERO_OR_ONE, Cardinality.EMPTY. This default implementation returns ZERO_OR_MORE (which effectively gives no information).
      • getValidationAction

        public int getValidationAction()
      • checkPermittedContents

        public void checkPermittedContents​(SchemaType parentType,
                                           StaticContext env,
                                           boolean whole)
                                    throws XPathException
        Check that any elements and attributes constructed or returned by this expression are acceptable in the content model of a given complex type. It's always OK to say yes, since the check will be repeated at run-time. The process of checking element and attribute constructors against the content model of a complex type also registers the type of content expected of those constructors, so the static validation can continue recursively.
        Specified by:
        checkPermittedContents in interface Expression
        Overrides:
        checkPermittedContents in class ComputedExpression
        Parameters:
        parentType - The schema type
        env - the static context
        whole - true if this expression is expected to make the whole content of the type, false if it is expected to make up only a part
        Throws:
        XPathException - if the expression doesn't match the required content type
      • evaluateItem

        public Item evaluateItem​(XPathContext context)
                          throws XPathException
        Description copied from class: SimpleNodeConstructor
        Evaluate as an expression. We rely on the fact that when these instructions are generated by XQuery, there will always be a valueExpression to evaluate the content
        Specified by:
        evaluateItem in interface Expression
        Overrides:
        evaluateItem in class SimpleNodeConstructor
        Parameters:
        context - The context in which the expression is to be evaluated
        Returns:
        the node or atomic value that results from evaluating the expression; or null to indicate that the result is an empty sequence
        Throws:
        XPathException - if any dynamic error occurs evaluating the expression
      • display

        public void display​(int level,
                            java.io.PrintStream out,
                            Configuration config)
        Display this instruction as an expression, for diagnostics
        Specified by:
        display in interface Expression
        Overrides:
        display in class SimpleNodeConstructor
        Parameters:
        level - indentation level for this expression
        out - Output destination