com.saxonica.ee.bytecode

Class AxisExpressionCompiler

java.lang.Object

com.saxonica.ee.bytecode.ExpressionCompiler

com.saxonica.ee.bytecode.ToIteratorCompiler

com.saxonica.ee.bytecode.AxisExpressionCompiler

public class AxisExpressionCompiler
extends ToIteratorCompiler

Generate bytecode for evaluation of an AxisExpression

Constructor Summary

Constructors

Constructor and Description
AxisExpressionCompiler()

Method Summary

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

Methods inherited from class com.saxonica.ee.bytecode.ToIteratorCompiler

compileToBoolean, compileToItem, compileToPush

Methods inherited from class com.saxonica.ee.bytecode.ExpressionCompiler

allocateStatic, compileItemFromInt, compileToPrimitive, generateMethod, handleEmptyStringResult, printStackTop, 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 - if the expression cannot be compiled to bytecode

iterate

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

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 - the compiler service

axis - the axis to be iterated over

test - the node test to be satisfied; possibly null if all nodes are selected