Package net.sf.saxon.instruct

Class FixedElement

java.lang.Object
net.sf.saxon.expr.ComputedExpression
net.sf.saxon.instruct.Instruction
net.sf.saxon.instruct.ParentNodeConstructor
net.sf.saxon.instruct.ElementCreator
net.sf.saxon.instruct.FixedElement
All Implemented Interfaces:
Serializable, SourceLocator, Container, Expression, TailCallReturner, InstructionInfoProvider
public class FixedElement extends ElementCreator
An instruction that creates an element node whose name is known statically. Used for literal results elements in XSLT, for direct element constructors in XQuery, and for xsl:element in cases where the name and namespace are known statically.
See Also:

  • Field Details

    • namespaceCodes

      protected int[] namespaceCodes

  • Constructor Details

    • FixedElement

      public FixedElement(int nameCode, int[] namespaceCodes, boolean inheritNamespaces, SchemaType schemaType, int validation)
      Create an instruction that creates a new element node
      Parameters:
      nameCode - Represents the name of the element node
      namespaceCodes - List of namespaces to be added to the element node. May be null if none are required.
      inheritNamespaces - true if the children of this element are to inherit its namespaces
      schemaType - Type annotation for the new element node

  • Method Details

    • 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

    • simplify

      public Expression simplify(StaticContext env) throws XPathException
      Simplify an expression. This performs any static optimization (by rewriting the expression as a different expression).
      Specified by:
      simplify in interface Expression
      Overrides:
      simplify in class ParentNodeConstructor
      Parameters:
      env - the static context
      Returns:
      the simplified expression
      Throws:
      XPathException - if an error is discovered during expression rewriting

    • getItemType

      public ItemType getItemType(TypeHierarchy th)
      Get the type of the item returned by this instruction
      Specified by:
      getItemType in interface Expression
      Overrides:
      getItemType in class ElementCreator
      Parameters:
      th -
      Returns:
      the item type

    • getNameCode

      public int getNameCode(XPathContext context)
      Callback from the superclass ElementCreator to get the nameCode for the element name
      Specified by:
      getNameCode in class ElementCreator
      Parameters:
      context - The evaluation context (not used)
      Returns:
      the name code for the element name

    • getNewBaseURI

      public String getNewBaseURI(XPathContext context)
      Description copied from class: ElementCreator
      Get the base URI for the element being constructed
      Specified by:
      getNewBaseURI in class ElementCreator
      Parameters:
      context -

    • 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

    • outputNamespaceNodes

      protected void outputNamespaceNodes(XPathContext context, Receiver out) throws XPathException
      Callback from the superclass ElementCreator to output the namespace nodes
      Specified by:
      outputNamespaceNodes in class ElementCreator
      Parameters:
      context - The evaluation context (not used)
      out - The receiver to handle the output
      Throws:
      XPathException

    • getActiveNamespaces

      public int[] getActiveNamespaces()
      Callback to get a list of the intrinsic namespaces that need to be generated for the element. The result is an array of namespace codes, the codes either occupy the whole array or are terminated by a -1 entry. A result of null is equivalent to a zero-length array.
      Overrides:
      getActiveNamespaces in class ElementCreator

    • display

      public void display(int level, PrintStream out, Configuration config)
      Display this instruction as an expression, for diagnostics
      Parameters:
      level - indentation level for this expression
      out - Output destination
      config -