Class FixedAttribute

All Implemented Interfaces:
Serializable, 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:
  • Constructor Details

    • 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 Details

    • 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.
    • getInstructionInfo

      public InstructionInfo getInstructionInfo()
      Description copied from class: ComputedExpression
      Get InstructionInfo for this expression
      Specified by:
      getInstructionInfo in interface InstructionInfoProvider
      Overrides:
      getInstructionInfo in class Instruction
    • getItemType

      public ItemType getItemType(TypeHierarchy th)
      Description copied from class: Instruction
      Get the item type of the items returned by evaluating this instruction
      Specified by:
      getItemType in interface Expression
      Overrides:
      getItemType in class Instruction
      Parameters:
      th -
      Returns:
      the static item type of the instruction
    • 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()
    • localTypeCheck

      public void localTypeCheck(StaticContext env, ItemType contextItemType)
      Specified by:
      localTypeCheck in class SimpleNodeConstructor
    • evaluateNameCode

      public int evaluateNameCode(XPathContext context)
      Overrides:
      evaluateNameCode in class SimpleNodeConstructor
    • 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
    • processLeavingTail

      public TailCall processLeavingTail(XPathContext context) throws XPathException
      Process this instruction
      Specified by:
      processLeavingTail in interface TailCallReturner
      Specified by:
      processLeavingTail in class Instruction
      Parameters:
      context - the dynamic context of the transformation
      Returns:
      a TailCall to be executed by the caller, always null for this instruction
      Throws:
      XPathException
    • 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, 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
      config -