com.saxonica.bytecode
Class AxisExpressionCompiler

java.lang.Object
  com.saxonica.bytecode.ExpressionCompiler
      com.saxonica.bytecode.ToIteratorCompiler
          com.saxonica.bytecode.AxisExpressionCompiler

public class AxisExpressionCompiler
extends ToIteratorCompiler

Generate bytecode for evaluation of an AxisExpression

Constructor Summary

AxisExpressionCompiler()

Method Summary

void	compileToIterator(CompilerService compiler, Expression expression) Generate bytecode to evaluate the expression as a SequenceIterator Precondition: none.
static void	iterate(CompilerService compiler, ExpressionCompiler ec, NodeTest test, int axis) Generate code to iterate over the selected axis.

Methods inherited from class com.saxonica.bytecode.ToIteratorCompiler

compileToBoolean, compileToItem, compileToPush

Methods inherited from class com.saxonica.bytecode.ExpressionCompiler

allocateStatic, compileItemFromInt, compileItemFromString, compileToLoop, compileToPrimitive, generateMethod, getConfiguration, handleEmptyStringResult, setConfiguration, throwXPathException, throwXPathException, unboxItem, verify, visitAnnotation, visitLineNumber

Methods inherited from class java.lang.Object

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

Constructor Detail

AxisExpressionCompiler

public AxisExpressionCompiler()

Method Detail

compileToIterator

public void compileToIterator(CompilerService compiler,
                              Expression expression)
                       throws CannotCompileException

Description copied from class: ExpressionCompiler

Generate bytecode to evaluate the expression as a SequenceIterator Precondition: none. Postcondition: at execution time, the stack contains a SequenceIterator representing the result of the expression

Specified by:

compileToIterator in class ExpressionCompiler

Parameters:

compiler - the compiler service

expression - the expression to be compiled

Throws:

CannotCompileException

iterate

public static void iterate(CompilerService compiler,
                           ExpressionCompiler ec,
                           NodeTest test,
                           int axis)

Generate code to iterate over the selected axis. Entry condition: the node forming the origin for the iteration is on the bytecode stack Exit condition: the iterator for the axisExpression is on the bytecode stack

Parameters:

compiler -

ec -

test -

axis -