com.saxonica.codegen
Class DistinctValuesCompiler

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