com.saxonica.codegen
Class VariableReferenceCompiler

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

public class VariableReferenceCompiler
extends SequenceExpressionCompiler

Generate Java code to implement an XPath variable reference

Constructor Summary

VariableReferenceCompiler()

Method Summary

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
static String	getJavaVariableName(CompilerService compiler, VariableReference ref)

Methods inherited from class com.saxonica.codegen.SequenceExpressionCompiler

compilePush, compileToEffectiveBooleanValue

Methods inherited from class com.saxonica.codegen.ExpressionCompiler

compileAsLoop, compileToCharSequence, compileToValueRepresentation

Methods inherited from class java.lang.Object

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

Constructor Detail

VariableReferenceCompiler

public VariableReferenceCompiler()

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

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).

getJavaVariableName

public static String getJavaVariableName(CompilerService compiler,
                                         VariableReference ref)