Class SlotManager

  • All Implemented Interfaces:
    java.io.Serializable

    public class SlotManager
    extends java.lang.Object
    implements java.io.Serializable
    A SlotManager supports functions, templates, etc: specifically, any executable code that requires a stack frame containing local variables. In XSLT a SlotManager underpins any top-level element that can contain local variable declarations, specifically, a top-level xsl:template, xsl:variable, xsl:param, or xsl:function element or an xsl:attribute-set element or xsl:key element. In XQuery it underpins functions and global variables. The purpose of the SlotManager is to allocate slot numbers to variables in the stack, and to record how many slots are needed. A Debugger may define a subclass with additional functionality.
    See Also:
    Serialized Form
    • Field Summary

      Fields 
      Modifier and Type Field Description
      static SlotManager EMPTY
      An empty SlotManager
    • Constructor Summary

      Constructors 
      Constructor Description
      SlotManager()
      The constructor should not be called directly.
      SlotManager​(int n)
      Create a SlotManager with a given number of slots
    • Field Detail

      • EMPTY

        public static SlotManager EMPTY
        An empty SlotManager
    • Constructor Detail

      • SlotManager

        public SlotManager()
        The constructor should not be called directly. A new SlotManager should be obtained using the factory method Configuration.makeSlotManager().
      • SlotManager

        public SlotManager​(int n)
        Create a SlotManager with a given number of slots
    • Method Detail

      • getNumberOfVariables

        public int getNumberOfVariables()
        Get number of variables (size of stack frame)
      • setNumberOfVariables

        public void setNumberOfVariables​(int numberOfVariables)
        Set the number of variables
        Parameters:
        numberOfVariables -
      • allocateSlotNumber

        public int allocateSlotNumber​(StructuredQName qName)
        Allocate a slot number for a variable
      • getVariableMap

        public java.util.List getVariableMap()
        Get the variable map (simply a list of variable names as structured QNames). Note that it is possible for several variables to have the same name.

        Changed in Saxon 9.0 to return a list of StructuredQName values rather than integers