com.saxonica.codegen
Class LocalVariableReferenceCompiler

java.lang.Object
  extended by com.saxonica.codegen.ExpressionCompiler
      extended by com.saxonica.codegen.SequenceExpressionCompiler
          extended by 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
 
Methods inherited from class java.lang.Object
equals, 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 SequenceExpressionCompiler
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


Copyright (C) Michael H. Kay. All rights reserved.