Package net.sf.saxon.expr.instruct

Class Fork

java.lang.Object
net.sf.saxon.expr.Expression
net.sf.saxon.expr.instruct.Instruction
net.sf.saxon.expr.instruct.Fork
All Implemented Interfaces:
ExportAgent, Locatable, IdentityComparable, Traceable
public class Fork extends Instruction
This class implements an xsl:fork expression.

  • Constructor Details

    • Fork

      public Fork(Operand[] prongs)
      Create a Fork instruction
      Parameters:
      prongs - the children of the xsl:fork instructions.

    • Fork

      public Fork(Expression[] prongs)

  • Method Details

    • operands

      public Iterable<Operand> operands()
      Description copied from class: Expression
      Get the immediate sub-expressions of this expression, with information about the relationship of each expression to its parent expression.

      If the expression is a Callable, then it is required that the order of the operands returned by this function is the same as the order of arguments supplied to the corresponding call() method.

      Specified by:
      operands in class Instruction
      Returns:
      an iterator containing the sub-expressions of this expression

    • getInstructionNameCode

      public int getInstructionNameCode()
      Get the namecode of the instruction for use in diagnostics
      Overrides:
      getInstructionNameCode in class Instruction
      Returns:
      a code identifying the instruction: typically but not always the fingerprint of a name in the XSLT namespace

    • getSize

      public int getSize()
      Get the number of prongs in the fork
      Returns:
      the number of xsl:sequence children

    • getProng

      public Expression getProng(int i)
      Get the n'th child expression of the xsl:fork (zero-based)
      Parameters:
      i - the index of the required subexpression
      Returns:
      the i'th subexpression if it exists
      Throws:
      IllegalArgumentException - if i is out of range

    • getItemType

      public ItemType getItemType()
      Determine the item type of the value returned by the function
      Overrides:
      getItemType in class Instruction
      Returns:
      the static item type of the instruction

    • getStreamerName

      public String getStreamerName()
      Get the (partial) name of a class that supports streaming of this kind of expression
      Overrides:
      getStreamerName in class Expression
      Returns:
      the partial name of a class that can be instantiated to provide streaming support in Saxon-EE, or null if there is no such class

    • copy

      public Expression copy(RebindingMap rebindings)
      Copy an expression. This makes a deep copy.
      Specified by:
      copy in class Expression
      Parameters:
      rebindings - the rebinding map
      Returns:
      the copy of the original expression

    • export

      public void export(ExpressionPresenter out) throws XPathException
      Diagnostic print of expression structure. The abstract expression tree is written to the supplied output destination.
      Specified by:
      export in interface ExportAgent
      Specified by:
      export in class Expression
      Parameters:
      out - the expression presenter used to display the structure
      Throws:
      XPathException - if the export fails, for example if an expression is found that won't work in the target environment.

    • getElaborator

      public Elaborator getElaborator()
      Description copied from class: Expression
      Make an elaborator for this expression
      Overrides:
      getElaborator in class Expression
      Returns:
      an appropriate Elaborator