Class SlotManager

java.lang.Object
net.sf.saxon.instruct.SlotManager
All Implemented Interfaces:
Serializable

public class SlotManager extends Object implements 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:
  • Constructor Details

    • SlotManager

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

    • 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(int fingerprint)
      Allocate a slot number for a variable
    • getVariableMap

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