com.saxonica.codegen
Class DistinctValuesCompiler

java.lang.Object
  extended by com.saxonica.codegen.ExpressionCompiler
      extended by com.saxonica.codegen.SequenceExpressionCompiler
          extended by com.saxonica.codegen.DistinctValuesCompiler

public class DistinctValuesCompiler
extends SequenceExpressionCompiler

Compile code to implement the distinct-values() function.


Constructor Summary
DistinctValuesCompiler()
           
 
Method Summary
 void compileAsLoop(CompilerService compiler, Expression expr, LoopAction action)
          Compile an expression in the form of a loop.
 String compileToIterator(CompilerService compiler, Expression expr)
          Generate Java code to evaluate the expression as a SequenceIterator
 
Methods inherited from class com.saxonica.codegen.SequenceExpressionCompiler
compilePush, compileToCharSequence, compileToEffectiveBooleanValue, compileToItem
 
Methods inherited from class com.saxonica.codegen.ExpressionCompiler
compileToValueRepresentation
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DistinctValuesCompiler

public DistinctValuesCompiler()
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

compileAsLoop

public void compileAsLoop(CompilerService compiler,
                          Expression expr,
                          LoopAction action)
Compile an expression in the form of a loop. Default implementation.

Overrides:
compileAsLoop in class ExpressionCompiler
Parameters:
compiler - the CompilerService
expr - the expression to be compiled
action - the action to be taken to process each item in the sequence returned by the expression


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