com.saxonica.codegen
Class FirstItemExpressionCompiler

java.lang.Object
  extended by com.saxonica.codegen.ExpressionCompiler
      extended by com.saxonica.codegen.SingletonExpressionCompiler
          extended by com.saxonica.codegen.FirstItemExpressionCompiler

public class FirstItemExpressionCompiler
extends SingletonExpressionCompiler

Compiler for a FirstItemExpression.


Constructor Summary
FirstItemExpressionCompiler()
           
 
Method Summary
 String compileToItem(CompilerService compiler, Expression expr)
          Generate Java code to evaluate the expression as an Item
 
Methods inherited from class com.saxonica.codegen.SingletonExpressionCompiler
compilePush, compileToCharSequence, compileToEffectiveBooleanValue, compileToIterator
 
Methods inherited from class com.saxonica.codegen.ExpressionCompiler
compileAsLoop, compileToValueRepresentation, getConfiguration, makeExpressionCompiler, setConfiguration
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

FirstItemExpressionCompiler

public FirstItemExpressionCompiler()
Method Detail

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).


Copyright (c) 2004-2010 Saxonica Limited. All rights reserved.