com.saxonica.codegen
Class ItemAtCompiler

java.lang.Object
  com.saxonica.codegen.IntegratedFunctionCompiler
      com.saxonica.codegen.ItemAtCompiler

public class ItemAtCompiler
extends IntegratedFunctionCompiler

Generate Java code to implement a saxon:item-at() expression

Constructor Summary

ItemAtCompiler()

Method Summary

String

compile(CompilerService compiler, ExtensionFunctionCall expr, Expression[] arguments, String[] variables) Generate Java code to evaluate the expression as a SequenceIterator

Methods inherited from class java.lang.Object

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

Constructor Detail

ItemAtCompiler

public ItemAtCompiler()

Method Detail

compile

public String compile(CompilerService compiler,
                      ExtensionFunctionCall expr,
                      Expression[] arguments,
                      String[] variables)

Description copied from class: IntegratedFunctionCompiler

Generate Java code to evaluate the expression as a SequenceIterator

Specified by:

compile in class IntegratedFunctionCompiler

Parameters:

compiler - the compiler service

expr - the integrated function call to be compiled

arguments - the arguments supplied to the function call

variables - an array of strings each being the Java name of a variable that holds the value of the corresponding argument, either as a SequenceIterator in the case of an argument that allows more than one value, or as an Item if the argument only allows a singleton

Returns:

a simple Java expression (usually the name of a variable that has been declared). If the result type of the function is boolean, this variable will hold a Java boolean. If the result type is an optional item, it will hold an Item (using null to represent an empty sequence). If it is any other type, the variable will hold a SequenceIterator, In each case the Java variable will at run-time hold the value of the XPath expression