/**
* Returns the live methods of a program whose root methods are the <tt>main</tt> method of a set
* of classes.
*
* @param classes Names of classes containing root methods
* @param context Repository for accessing BLOAT stuff
* @return The <tt>MemberRef</tt>s of the live methods
*/
private static Collection liveMethods(final Collection classes, final BloatContext context) {
// Determine the roots of the call graph
final Set roots = new HashSet();
Iterator iter = classes.iterator();
while (iter.hasNext()) {
final String className = (String) iter.next();
try {
final ClassEditor ce = context.editClass(className);
final MethodInfo[] methods = ce.methods();
for (int i = 0; i < methods.length; i++) {
final MethodEditor me = context.editMethod(methods[i]);
if (!me.name().equals("main")) {
continue;
}
BloatBenchmark.tr(" Root " + ce.name() + "." + me.name() + me.type());
roots.add(me.memberRef());
}
} catch (final ClassNotFoundException ex1) {
BloatBenchmark.err.println("** Could not find class: " + ex1.getMessage());
System.exit(1);
}
}
if (roots.isEmpty()) {
BloatBenchmark.err.print("** No main method found in classes: ");
iter = classes.iterator();
while (iter.hasNext()) {
final String name = (String) iter.next();
BloatBenchmark.err.print(name);
if (iter.hasNext()) {
BloatBenchmark.err.print(", ");
}
}
BloatBenchmark.err.println("");
}
context.setRootMethods(roots);
final CallGraph cg = context.getCallGraph();
final Set liveMethods = new TreeSet(new MemberRefComparator());
liveMethods.addAll(cg.liveMethods());
return (liveMethods);
}
