Expression[] actions = new Expression[entries];
int w = 0;
AxisIterator kids = iterateAxis(Axis.CHILD);
while(true) {
NodeInfo curr = (NodeInfo)kids.next();
if (curr == null) {
break;
}
if (curr instanceof XSLWhen) {
conditions[w] = ((XSLWhen)curr).getCondition();
Expression b = ((XSLWhen)curr).compileSequenceConstructor(
exec, curr.iterateAxis(Axis.CHILD), true);
if (b == null) {
b = Literal.makeEmptySequence();
}
try {
b = makeExpressionVisitor().simplify(b);
actions[w] = b;
} catch (XPathException e) {
compileError(e);
}
if (getPreparedStylesheet().isCompileWithTracing()) {
TraceWrapper trace = makeTraceInstruction((XSLWhen)curr, actions[w]);
actions[w] = trace;
}
// Optimize for constant conditions (true or false)
if (conditions[w] instanceof Literal && ((Literal)conditions[w]).getValue() instanceof BooleanValue) {
if (((BooleanValue)((Literal)conditions[w]).getValue()).getBooleanValue()) {
// constant true: truncate the tests here
entries = w+1;
break;
} else {
// constant false: omit this test
w--;
entries--;
}
}
w++;
} else if (curr instanceof XSLOtherwise) {
conditions[w] = Literal.makeLiteral(BooleanValue.TRUE);
Expression b = ((XSLOtherwise)curr).compileSequenceConstructor(
exec, curr.iterateAxis(Axis.CHILD), true);
if (b == null) {
b = Literal.makeEmptySequence();
}
try {
b = makeExpressionVisitor().simplify(b);