/**
* Creates a new Extended Resolver
*
* @param servers An array of server names for which SimpleResolver contexts should be
* initialized.
* @see SimpleResolver
* @exception UnknownHostException Failure occured initializing SimpleResolvers
*/
public ExtendedResolver(String[] servers) throws UnknownHostException {
init();
for (int i = 0; i < servers.length; i++) {
Resolver r = new SimpleResolver(servers[i]);
r.setTimeout(quantum);
resolvers.add(r);
}
}
/**
* Creates a new Extended Resolver. The default ResolverConfig is used to determine the servers
* for which SimpleResolver contexts should be initialized.
*
* @see SimpleResolver
* @see ResolverConfig
* @exception UnknownHostException Failure occured initializing SimpleResolvers
*/
public ExtendedResolver() throws UnknownHostException {
init();
String[] servers = ResolverConfig.getCurrentConfig().servers();
if (servers != null) {
for (int i = 0; i < servers.length; i++) {
Resolver r = new SimpleResolver(servers[i]);
r.setTimeout(quantum);
resolvers.add(r);
}
} else resolvers.add(new SimpleResolver());
}
public static void load(
Resolver loader,
String file,
SimpleDirectedGraph<GraphClass, Inclusion> graph,
Vector problems) {
ISGCIReader gcr = new ISGCIReader(graph, problems);
XMLParser xml = new XMLParser(loader.openInputSource(file), gcr, loader.getEntityResolver());
xml.parse();
date = gcr.getDate();
nodecount = gcr.getNodeCount();
edgecount = gcr.getEdgeCount();
relations = gcr.getRelations();
}
/**
* Creates a Zone by performing a zone transfer to the specified host. All records that do not
* belong in the Zone are added to the specified Cache.
*
* @see Cache
* @see Master
*/
public Zone(Name zone, short dclass, String remote, Cache cache) throws IOException {
super(false);
origin = zone;
this.dclass = dclass;
type = SECONDARY;
Resolver res = new SimpleResolver(remote);
Record rec = Record.newRecord(zone, Type.AXFR, dclass);
Message query = Message.newQuery(rec);
Message response = res.send(query);
Record[] recs = response.getSectionArray(Section.ANSWER);
for (int i = 0; i < recs.length; i++) {
if (!recs[i].getName().subdomain(origin)) {
if (Options.check("verbose"))
System.err.println(recs[i].getName() + "is not in zone " + origin);
continue;
}
addRecord(recs[i]);
}
if (cache != null) {
recs = response.getSectionArray(Section.ADDITIONAL);
for (int i = 0; i < recs.length; i++) cache.addRecord(recs[i], Credibility.GLUE, recs);
}
validate();
}
/**
* Find a type object in the context of the class.
*
* @param name The name to search for.
*/
public Named find(Matcher<Named> matcher, Context context) throws SemanticException {
Name name = matcher.name();
if (Report.should_report(TOPICS, 2)) Report.report(2, "Looking for " + name + " in " + this);
if (!(type instanceof ClassType)) {
throw new NoClassException(name.toString(), type);
}
ClassType type = (ClassType) this.type;
Named m = null;
QName fullName = null;
QName rawName = null;
if (type.isGloballyAccessible()) {
fullName = QName.make(type.fullName(), name);
QName q = ts.getTransformedClassName(type.def());
rawName = QName.make(q.qualifier(), Name.make(q.name() + "$" + name));
}
if (fullName != null) {
// First check the system resolver.
m = ts.systemResolver().check(fullName);
// Try the raw class file name.
if (m == null) {
m = ts.systemResolver().check(rawName);
}
if (m == null) {
// Go to disk, but only if there is no job for the type.
// If there is a job, all members should be in the resolver
// already.
boolean useLoadedResolver = true;
if (type instanceof ParsedTypeObject) {
ParsedTypeObject pto = (ParsedTypeObject) type;
if (pto.job() != null) {
useLoadedResolver = false;
}
}
if (useLoadedResolver) {
try {
m = ts.systemResolver().find(rawName);
} catch (SemanticException e) {
// Not found; will fall through to error handling code
}
}
}
// If we found something, verify that it matches.
if (m != null) {
try {
m = matcher.instantiate(m);
} catch (SemanticException e) {
// Doesn't match; try again.
m = null;
}
}
}
// Check if the member was explicitly declared.
if (m == null) {
m = type.memberTypeMatching(matcher);
}
// If we found something, make sure it's accessible.
if (m instanceof ClassType) {
ClassType mt = (ClassType) m;
if (!mt.isMember()) {
throw new SemanticException(
"Class " + mt + " is not a member class, " + " but was found in " + type + ".");
}
if (!mt.outer().equals((Object) type)) {
throw new SemanticException(
"Class " + mt + " is not a member class " + " of " + type + ".");
}
return mt;
}
if (m instanceof MemberInstance) {
MemberInstance<?> mi = (MemberInstance<?>) m;
if (!mi.container().equals((Object) type)) {
throw new SemanticException("Type " + mi + " is not a member " + " of " + type + ".");
}
}
if (m != null) {
if (!canAccess(m, context.currentClassDef(), context)) {
throw new SemanticException("Cannot access member type \"" + m + "\".");
}
return m;
}
// If we struck out, try the super types.
// Collect all members of the super types.
// Use a Set to eliminate duplicates.
Set<Named> acceptable = new HashSet<Named>();
if (type.superClass() != null) {
Type sup = type.superClass();
if (sup instanceof ClassType) {
Resolver r = ts.classContextResolver((ClassType) sup, context);
try {
Named n = r.find(matcher);
acceptable.add(n);
} catch (SemanticException e) {
}
}
}
for (Iterator<Type> i = type.interfaces().iterator(); i.hasNext(); ) {
Type sup = (Type) i.next();
if (sup instanceof ClassType) {
Resolver r = ts.classContextResolver((ClassType) sup, context);
try {
Named n = r.find(matcher);
acceptable.add(n);
} catch (SemanticException e) {
}
}
}
if (acceptable.size() == 0) {
throw new NoClassException(name.toString(), type);
} else if (acceptable.size() > 1) {
Set<Type> containers = new HashSet<Type>(acceptable.size());
for (Named n : acceptable) {
if (n instanceof MemberInstance) {
MemberInstance<?> mi = (MemberInstance<?>) n;
containers.add(mi.container());
}
}
if (containers.size() == 2) {
Iterator<Type> i = containers.iterator();
Type t1 = (Type) i.next();
Type t2 = (Type) i.next();
throw new SemanticException(
"Member \""
+ name
+ "\" of "
+ type
+ " is ambiguous; it is defined in both "
+ t1
+ " and "
+ t2
+ ".");
} else if (containers.size() == 0) {
throw new SemanticException("Member \"" + name + "\" of " + type + " is ambiguous.");
} else {
throw new SemanticException(
"Member \""
+ name
+ "\" of "
+ type
+ " is ambiguous; it is defined in "
+ CollectionUtil.listToString(new ArrayList<Type>(containers))
+ ".");
}
}
assert acceptable.size() == 1;
Named t = acceptable.iterator().next();
if (Report.should_report(TOPICS, 2)) Report.report(2, "Found member type " + t);
return t;
}
public static Record[] getRecords(String namestr, short type, short dclass, byte cred) {
Message query;
Message response;
Record question;
Record[] answers;
int answerCount = 0, i = 0;
Enumeration e;
Name name = new Name(namestr);
/*System.out.println("lookup of " + name + " " + Type.string(type));*/
if (!Type.isRR(type) && type != Type.ANY) return null;
if (res == null) {
try {
eres = new ExtendedResolver();
} catch (UnknownHostException uhe) {
System.out.println("Failed to initialize resolver");
System.exit(-1);
}
}
if (cache == null) cache = new Cache();
CacheResponse cached = cache.lookupRecords(name, type, dclass, cred);
/*System.out.println(cached);*/
if (cached.isSuccessful()) {
RRset rrset = cached.answer();
answerCount = rrset.size();
e = rrset.rrs();
} else if (cached.isNegative()) {
answerCount = 0;
e = null;
} else {
question = Record.newRecord(name, type, dclass);
query = Message.newQuery(question);
if (res != null) response = res.send(query);
else response = eres.send(query);
short rcode = response.getHeader().getRcode();
if (rcode == Rcode.NOERROR || rcode == Rcode.NXDOMAIN) cache.addMessage(response);
if (rcode != Rcode.NOERROR) return null;
e = response.getSection(Section.ANSWER);
while (e.hasMoreElements()) {
Record r = (Record) e.nextElement();
if (matchType(r.getType(), type)) answerCount++;
}
e = response.getSection(Section.ANSWER);
}
if (answerCount == 0) return null;
answers = new Record[answerCount];
while (e.hasMoreElements()) {
Record r = (Record) e.nextElement();
if (matchType(r.getType(), type)) answers[i++] = r;
}
return answers;
}
