com.saxonica.bytecode
Class ValueOfCompiler

java.lang.Object
  com.saxonica.bytecode.ExpressionCompiler
      com.saxonica.bytecode.ToIteratorCompiler
          com.saxonica.bytecode.ToPushCompiler
              com.saxonica.bytecode.SimpleNodeConstructorCompiler
                  com.saxonica.bytecode.ValueOfCompiler

public class ValueOfCompiler
extends SimpleNodeConstructorCompiler

Generate code for a ValueOf instruction

Constructor Summary

ValueOfCompiler()

Method Summary

void	compileToItem(CompilerService compiler, Expression expression) Generate bytecode to get the ValueOf text from the instruction Precondition: none.
protected boolean	isNoNodeIfEmpty(Expression expr) Overridable method to ask whether no node should be produced in the case that the content is empty
protected void	pushNode(CompilerService compiler, Expression expression) Generate code to write the node to the current receiver.

Methods inherited from class com.saxonica.bytecode.SimpleNodeConstructorCompiler

checkContent, compileNodeName, compileToPush, isNamedNodeKind

Methods inherited from class com.saxonica.bytecode.ToPushCompiler

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

ValueOfCompiler

public ValueOfCompiler()

Method Detail

compileToItem

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

Generate bytecode to get the ValueOf text from the instruction Precondition: none. Postcondition: the stack contains an item from evaluating this instruction

Overrides:

compileToItem in class SimpleNodeConstructorCompiler

Parameters:

compiler - the compiler service

expression - the expression to be compiled

Throws:

CannotCompileException

isNoNodeIfEmpty

protected boolean isNoNodeIfEmpty(Expression expr)

Overridable method to ask whether no node should be produced in the case that the content is empty

Overrides:

isNoNodeIfEmpty in class SimpleNodeConstructorCompiler

Returns:

true if the rules for this instruction are that when the content is empty, no node is generated

pushNode

protected void pushNode(CompilerService compiler,
                        Expression expression)

Generate code to write the node to the current receiver. On entry the stack holds the current receiver, the node name (for named node kinds only) and the content (for all nodes)

Specified by:

pushNode in class SimpleNodeConstructorCompiler

Parameters:

compiler -

expression -