com.saxonica.codegen
Class LocalVariableReferenceCompiler

java.lang.Object
  com.saxonica.codegen.ExpressionCompiler
      com.saxonica.codegen.SequenceExpressionCompiler
          com.saxonica.codegen.LocalVariableReferenceCompiler

public class LocalVariableReferenceCompiler
extends SequenceExpressionCompiler

Generate Java code to implement an XPath local variable reference

Constructor Summary

LocalVariableReferenceCompiler()

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	compileToCharSequence(CompilerService compiler, Expression expr) Generate Java code to evaluate the expression as a CharSequence
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
String	compileToValueRepresentation(CompilerService compiler, Expression expr) Generate Java code to evaluate the expression as a ValueRepresentation

Methods inherited from class com.saxonica.codegen.SequenceExpressionCompiler

compileToEffectiveBooleanValue

Methods inherited from class com.saxonica.codegen.ExpressionCompiler

compileAsLoop, getConfiguration, makeExpressionCompiler, setConfiguration

Methods inherited from class java.lang.Object

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

Constructor Detail

LocalVariableReferenceCompiler

public LocalVariableReferenceCompiler()

Method Detail

compileToIterator

public String compileToIterator(CompilerService compiler,
                                Expression expr)

Description copied from class: ExpressionCompiler

Generate Java code to evaluate the expression as a SequenceIterator

Specified by:

compileToIterator in class ExpressionCompiler

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

compileToValueRepresentation

public String compileToValueRepresentation(CompilerService compiler,
                                           Expression expr)

Description copied from class: ExpressionCompiler

Generate Java code to evaluate the expression as a ValueRepresentation

Overrides:

compileToValueRepresentation 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 ValueRepresentation, and which at run-time will hold the value of the expression

compileToItem

public String compileToItem(CompilerService compiler,
                            Expression expr)

Description copied from class: ExpressionCompiler

Generate Java code to evaluate the expression as an Item

Overrides:

compileToItem in class SequenceExpressionCompiler

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).

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 SequenceExpressionCompiler

Parameters:

compiler - the compiler service

expr - the expression to be compiled

compileToCharSequence

public String compileToCharSequence(CompilerService compiler,
                                    Expression expr)

Description copied from class: ExpressionCompiler

Generate Java code to evaluate the expression as a CharSequence

Overrides:

compileToCharSequence in class ExpressionCompiler

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, or a string literal) which will be of class CharSequence, and which will hold the string value of the XPath expression at run-time