/** Extracts reference metrics from a single instruction. */
public void extract(Instruction inst) {
String name = null;
if (inst == null) {
return;
}
if (!(inst instanceof RootInst)) {
refs.increment(inst);
}
switch (inst.getType()) {
case TEXT:
refs.textBytes += ((TextInst) inst).getView().length();
break;
case ALTERNATES_WITH:
AlternatesWithInst alternatesWith = (AlternatesWithInst) inst;
extractBlock(alternatesWith.getConsequent());
extract(alternatesWith.getAlternative());
break;
case IF:
{
BlockInstruction blockInst = (BlockInstruction) inst;
refs.addIfInstruction(blockInst);
if (inst instanceof IfInst) {
IfInst ifInst = (IfInst) inst;
for (Object[] var : ifInst.getVariables()) {
name = ReprEmitter.get(var);
refs.addVariable(name);
}
} else {
IfPredicateInst ifInst = (IfPredicateInst) inst;
refs.increment(ifInst.getPredicate());
}
extractBlock(blockInst.getConsequent());
extract(blockInst.getAlternative());
break;
}
case OR_PREDICATE:
case PREDICATE:
PredicateInst predicateInst = (PredicateInst) inst;
Predicate predicate = predicateInst.getPredicate();
if (predicate != null) {
refs.increment(predicate);
List<String> varRefs = predicate.getVariableNames(predicateInst.getArguments());
for (String varRef : varRefs) {
refs.addVariable(varRef);
}
}
extractBlock(predicateInst.getConsequent());
extract(predicateInst.getAlternative());
break;
case REPEATED:
RepeatedInst repeated = (RepeatedInst) inst;
name = ReprEmitter.get(repeated.getVariable());
refs.pushSection(name);
extractBlock(repeated.getConsequent());
extract(repeated.getAlternative());
extract(repeated.getAlternatesWith());
refs.popSection();
break;
case ROOT:
extractBlock(((RootInst) inst).getConsequent());
break;
case SECTION:
SectionInst section = (SectionInst) inst;
name = ReprEmitter.get(section.getVariable());
refs.pushSection(name);
extractBlock(section.getConsequent());
extract(section.getAlternative());
refs.popSection();
break;
case VARIABLE:
VariableInst variable = (VariableInst) inst;
name = ReprEmitter.get(variable.getVariable());
refs.addVariable(name);
for (FormatterCall call : variable.getFormatters()) {
refs.increment(call.getFormatter());
}
break;
default:
break;
}
}
