com.saxonica.codegen
Class RootFunctionCompiler

java.lang.Object
  com.saxonica.codegen.ExpressionCompiler
      com.saxonica.codegen.SingletonExpressionCompiler
          com.saxonica.codegen.RootFunctionCompiler

public class RootFunctionCompiler
extends SingletonExpressionCompiler

Generate Java code to implement the expression "root()"

Constructor Summary

RootFunctionCompiler()

Method Summary

void	compilePush(CompilerService compiler, Expression expr) Generate Java code to execute the expression in push mode, that is, code to write events to the current output Receiver
String	compileToItem(CompilerService compiler, Expression expr) Generate Java code to evaluate the expression as an Item
String	compileToIterator(CompilerService compiler, Expression expr) Generate Java code to evaluate the expression as a SequenceIterator

Methods inherited from class com.saxonica.codegen.SingletonExpressionCompiler

compileToCharSequence, compileToEffectiveBooleanValue

Methods inherited from class com.saxonica.codegen.ExpressionCompiler

compileAsLoop, compileToValueRepresentation

Methods inherited from class java.lang.Object

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

Constructor Detail

RootFunctionCompiler

public RootFunctionCompiler()

Method Detail

compilePush

public void compilePush(CompilerService compiler,
                        Expression expr)

Description copied from class: ExpressionCompiler

Generate Java code to execute the expression in push mode, that is, code to write events to the current output Receiver

Overrides:

compilePush in class SingletonExpressionCompiler

Parameters:

compiler - the compiler service

expr - the expression to be compiled

compileToIterator

public String compileToIterator(CompilerService compiler,
                                Expression expr)

Description copied from class: ExpressionCompiler

Generate Java code to evaluate the expression as a SequenceIterator

Overrides:

compileToIterator in class SingletonExpressionCompiler

Parameters:

compiler - the compiler service

expr - the XPath expression to be compiled

Returns:

a simple Java expression (usually the name of a variable that has been declared) which will be of class SequenceIterator, and which at run-time will hold an iterator over the the value of the XPath expression

compileToItem

public String compileToItem(CompilerService compiler,
                            Expression expr)

Description copied from class: ExpressionCompiler

Generate Java code to evaluate the expression as an Item

Specified by:

compileToItem in class ExpressionCompiler

Parameters:

compiler - the compiler service

expr - the expression to be compiled

Returns:

a simple Java expression (usually the name of a variable that has been declared) which will be of class Item, and which will hold the value of the expression at run-time (or hold null, representing an empty sequence).