com.saxonica.ee.stream

Class ComponentInversion

java.lang.Object

com.saxonica.ee.stream.ComponentInversion

public class ComponentInversion
extends java.lang.Object

This class represents the inversion of a template or function body

Constructor Summary

Constructors

Constructor and Description
ComponentInversion(Expression body) Create the Jackson inversion of a template or function, allowing the template or function to execute on a streamed input source.

Method Summary

Modifier and Type	Method and Description
void	explain(ExpressionPresenter presenter) Output diagnostic explanation to an ExpressionPresenter
Inversion	getInversion()
SlotManager	getStackFrame() Get the stackframe identifying the slots used for local variables
Watch	getWatch(WatchManager wm, Feed result, XPathContext context) Get a Watch associated with this template, if any.
void	invert(boolean isW3CStreamable) Invert the body of the template.
void	setStackFrame(SlotManager frame) Set the stackframe identifying the slots used for local variables

Methods inherited from class java.lang.Object

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

Constructor Detail

ComponentInversion

public ComponentInversion(Expression body)

Create the Jackson inversion of a template or function, allowing the template or function to execute on a streamed input source.

Parameters:

body - the body of the template to be inverted

Method Detail

getWatch

public Watch getWatch(WatchManager wm,
                      Feed result,
                      XPathContext context)
               throws XPathException

Get a Watch associated with this template, if any. This creates a watch to implement the "drill-down" instruction of the inverted template, for example if the drill-down instruction is CopyOfFeed with that expression as its selection.

Parameters:

wm - the WatchManager which keeps track of all active Watches

result - the destination for the output of this Watch

context - the stack of dynamic context objects for the active Watches

Returns:

the Watch if there is one, or null otherwise.

Throws:

XPathException - if an error occurs

invert

public void invert(boolean isW3CStreamable)
            throws XPathException

Invert the body of the template.

Throws:

XPathException - if the template is non-streamable

setStackFrame

public void setStackFrame(SlotManager frame)

Set the stackframe identifying the slots used for local variables

Parameters:

frame - the stack frame skeleton

getStackFrame

public SlotManager getStackFrame()

Get the stackframe identifying the slots used for local variables

Returns:

the stack frame skeleton

getInversion

public Inversion getInversion()

explain

public void explain(ExpressionPresenter presenter)
             throws XPathException

Output diagnostic explanation to an ExpressionPresenter

Parameters:

presenter - the destination for the output

Throws:

XPathException