Package net.sf.saxon.trace

Class ContextStackIterator

  • All Implemented Interfaces:
    java.util.Iterator<ContextStackFrame>
    public class ContextStackIterator
extends java.lang.Object
implements java.util.Iterator<ContextStackFrame>
    This class provides a representation of the current runtime call stack, as represented by the stack of XPathContext objects.

    • Constructor Summary

      Constructors 
      Constructor Description
      ContextStackIterator​(XPathContext context)
      Create an iterator over the stack of XPath dynamic context objects, starting with the top-most stackframe and working down.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean hasNext()
      Returns true if the iteration has more elements.
      ContextStackFrame next()
      Returns the next element in the iteration.
      void remove()
      Removes from the underlying collection the last element returned by the iterator (optional operation).

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

      • Methods inherited from interface java.util.Iterator

        forEachRemaining

    • Constructor Detail

      • ContextStackIterator

        public ContextStackIterator​(XPathContext context)
        Create an iterator over the stack of XPath dynamic context objects, starting with the top-most stackframe and working down. The objects returned by this iterator will be of class ContextStackFrame. Note that only "major" context objects are considered - those that have a stack frame of their own.
        Parameters:
        context - the current context

    • Method Detail

      • hasNext

        public boolean hasNext()
        Returns true if the iteration has more elements. (In other words, returns true if next would return an element rather than throwing an exception.)
        Specified by:
        hasNext in interface java.util.Iterator<ContextStackFrame>
        Returns:
        true if the iterator has more elements.

      • next

        public ContextStackFrame next()
        Returns the next element in the iteration. Calling this method repeatedly until the hasNext() method returns false will return each element in the underlying collection exactly once.
        Specified by:
        next in interface java.util.Iterator<ContextStackFrame>
        Returns:
        the next element in the iteration, which will always be an instance of ContextStackFrame
        Throws:
        java.util.NoSuchElementException - iteration has no more elements.

      • remove

        public void remove()
        Removes from the underlying collection the last element returned by the iterator (optional operation).
        Specified by:
        remove in interface java.util.Iterator<ContextStackFrame>
        Throws:
        java.lang.UnsupportedOperationException - as the remove operation is not supported by this Iterator.