com.saxonica.bytecode
Class ElementCreatorCompiler

java.lang.Object
  com.saxonica.bytecode.ExpressionCompiler
      com.saxonica.bytecode.ToIteratorCompiler
          com.saxonica.bytecode.ToPushCompiler
              com.saxonica.bytecode.ElementCreatorCompiler

Direct Known Subclasses:

ComputedElementCompiler, FixedElementCompiler

public abstract class ElementCreatorCompiler
extends ToPushCompiler

Generate bytecode. An instruction that creates an element node. There are two subtypes, FixedElement for use where the name is known statically, and Element where it is computed dynamically.

Constructor Summary

ElementCreatorCompiler()

Method Summary

protected static void	addTypeStripper(CompilerService compiler) Add a filter to the output pipeline that removes type annotations.
void	compileToPush(CompilerService compiler, Expression expression) Generate bytecode to evaluate the expression in push mode Precondition: none.
abstract void	identifyExpression(CompilerService compiler, Expression expression, String evalMode)
protected void	outputNamespaceNodes(CompilerService compiler, Expression expression) Callback for subclasses to implement: generate code to output namespace nodes
protected abstract void	pushNodeName(CompilerService compiler, Expression expression) Callback from the superclass ElementCreatorCompiler to get the nameCode.

Methods inherited from class com.saxonica.bytecode.ToPushCompiler

compileToItem, compileToIterator

Methods inherited from class com.saxonica.bytecode.ToIteratorCompiler

compileToBoolean

Methods inherited from class com.saxonica.bytecode.ExpressionCompiler

allocateStatic, compileItemFromInt, compileItemFromString, compileToLoop, compileToPrimitive, generateMethod, getConfiguration, handleEmptyStringResult, setConfiguration, throwXPathException, throwXPathException, unboxItem, verify, visitAnnotation, visitLineNumber

Methods inherited from class java.lang.Object

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

Constructor Detail

ElementCreatorCompiler

public ElementCreatorCompiler()

Method Detail

compileToPush

public void compileToPush(CompilerService compiler,
                          Expression expression)
                   throws CannotCompileException

Description copied from class: ExpressionCompiler

Generate bytecode to evaluate the expression in push mode Precondition: none. Postcondition: at execution time, the stack is unchanged, and the value of the expression has been written to the current receiver

Overrides:

compileToPush in class ToIteratorCompiler

Parameters:

compiler - the compiler service

expression - the expression to be compiled

Throws:

CannotCompileException

outputNamespaceNodes

protected void outputNamespaceNodes(CompilerService compiler,
                                    Expression expression)

Callback for subclasses to implement: generate code to output namespace nodes

Parameters:

compiler -

expression -

pushNodeName

protected abstract void pushNodeName(CompilerService compiler,
                                     Expression expression)
                              throws CannotCompileException

Callback from the superclass ElementCreatorCompiler to get the nameCode. Leaves the name code for the element name on the stack for the element name

Parameters:

compiler -

expression -

Throws:

CannotCompileException

addTypeStripper

protected static void addTypeStripper(CompilerService compiler)

Add a filter to the output pipeline that removes type annotations. This method adds a new entry to the receiver stack, whether it creates a new filter or not.

Parameters:

compiler - the compiler service

identifyExpression

public abstract void identifyExpression(CompilerService compiler,
                                        Expression expression,
                                        String evalMode)