com.saxonica.codegen
Class IntegratedFunctionCallCompiler

java.lang.Object
  extended by com.saxonica.codegen.ExpressionCompiler
      extended by com.saxonica.codegen.IntegratedFunctionCallCompiler

public class IntegratedFunctionCallCompiler
extends ExpressionCompiler

Generate Java code to implement a call on an "integrated extension function"


Constructor Summary
IntegratedFunctionCallCompiler()
           
 
Method Summary
 void compilePush(CompilerService compiler, Expression expression)
          Generate Java code to execute the expression in push mode, that is, code to write events to the current output Receiver
 String compileToEffectiveBooleanValue(CompilerService compiler, Expression expression, ReturnAction options)
          Generate Java code to evaluate the effective boolean value of the expression
 String compileToItem(CompilerService compiler, Expression expression)
          Generate Java code to evaluate the expression as an Item
 String compileToIterator(CompilerService compiler, Expression expression)
          Generate Java code to evaluate the expression as a SequenceIterator
 
Methods inherited from class com.saxonica.codegen.ExpressionCompiler
compileAsLoop, compileToCharSequence, compileToValueRepresentation, getConfiguration, makeExpressionCompiler, setConfiguration
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

IntegratedFunctionCallCompiler

public IntegratedFunctionCallCompiler()
Method Detail

compilePush

public void compilePush(CompilerService compiler,
                        Expression expression)
Generate Java code to execute the expression in push mode, that is, code to write events to the current output Receiver

Specified by:
compilePush in class ExpressionCompiler
Parameters:
compiler - the compiler service
expression - the expression to be compiled

compileToItem

public String compileToItem(CompilerService compiler,
                            Expression expression)
Generate Java code to evaluate the expression as an Item

Specified by:
compileToItem in class ExpressionCompiler
Parameters:
compiler - the compiler service
expression - 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).

compileToIterator

public String compileToIterator(CompilerService compiler,
                                Expression expression)
Generate Java code to evaluate the expression as a SequenceIterator

Specified by:
compileToIterator in class ExpressionCompiler
Parameters:
compiler - the compiler service
expression - 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

compileToEffectiveBooleanValue

public String compileToEffectiveBooleanValue(CompilerService compiler,
                                             Expression expression,
                                             ReturnAction options)
Generate Java code to evaluate the effective boolean value of the expression

Specified by:
compileToEffectiveBooleanValue in class ExpressionCompiler
Parameters:
compiler - the compiler service
expression - the XPath expression to be compiled
options - indicates how the boolean result is to be returned
Returns:
the result depends on the supplied value of the options argument. If options is a JavaDeclaration, the code must declare a Java variable and return the name of this variable. If options is a JavaAssignment, the code must assign the value to an existing Java variable. If options is a Return, the code must generate a return statement that returns the value of the boolean (in which case the result of this method is null).


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