Package net.sf.saxon.expr

Class PositionVariable

java.lang.Object
net.sf.saxon.expr.PositionVariable
All Implemented Interfaces:
Binding
public class PositionVariable extends Object implements Binding
Represents the defining occurrence of the position variable in a for expression within an expression, for example the $p in "for $x at $p in ...".

  • Constructor Details

    • PositionVariable

      public PositionVariable()
      Create a RangeVariable

  • Method Details

    • getVariableQName

      public StructuredQName getVariableQName()
      Get the name of the variable, as a namepool name code
      Specified by:
      getVariableQName in interface Binding
      Returns:
      the nameCode

    • getRequiredType

      public SequenceType getRequiredType()
      Get the required type (declared type) of the variable
      Specified by:
      getRequiredType in interface Binding
      Returns:
      the required type

    • setVariableQName

      public void setVariableQName(StructuredQName variableName)
      Set the name of the variable
      Parameters:
      variableName - the name of the variable

    • setSlotNumber

      public void setSlotNumber(int nr)
      Set the slot number for the range variable
      Parameters:
      nr - the slot number to be used

    • getLocalSlotNumber

      public int getLocalSlotNumber()
      If this is a local variable held on the local stack frame, return the corresponding slot number. In other cases, return -1.
      Specified by:
      getLocalSlotNumber in interface Binding
      Returns:
      the slot number on the local stack frame

    • evaluateVariable

      public ValueRepresentation evaluateVariable(XPathContext context) throws XPathException
      Get the value of the range variable
      Specified by:
      evaluateVariable in interface Binding
      Parameters:
      context - the XPath dynamic evaluation context
      Returns:
      the result of evaluating the variable
      Throws:
      XPathException

    • isAssignable

      public boolean isAssignable()
      Test whether it is permitted to assign to the variable using the saxon:assign extension element. This will only be for an XSLT global variable where the extra attribute saxon:assignable="yes" is present.
      Specified by:
      isAssignable in interface Binding
      Returns:
      true if the binding is assignable

    • isGlobal

      public boolean isGlobal()
      Indicate whether the binding is local or global. A global binding is one that has a fixed value for the life of a query or transformation; any other binding is local.
      Specified by:
      isGlobal in interface Binding
      Returns:
      true if the binding is global