Class ItemAtCompiler

  extended by com.saxonica.codegen.IntegratedFunctionCompiler
      extended by com.saxonica.codegen.ItemAtCompiler

public class ItemAtCompiler
extends IntegratedFunctionCompiler

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

Constructor Summary
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


public ItemAtCompiler()
Method Detail


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
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
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

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