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package pl.edu.mimuw.cloudatlas.agent;
import java.io.PrintStream;
import java.rmi.RemoteException;
import java.util.List;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
import pl.edu.mimuw.cloudatlas.interpreter.Interpreter;
import pl.edu.mimuw.cloudatlas.interpreter.InterpreterException;
import pl.edu.mimuw.cloudatlas.interpreter.Main;
import pl.edu.mimuw.cloudatlas.interpreter.QueryResult;
import pl.edu.mimuw.cloudatlas.model.Attribute;
import pl.edu.mimuw.cloudatlas.model.AttributesMap;
import pl.edu.mimuw.cloudatlas.model.PathName;
import pl.edu.mimuw.cloudatlas.model.ValueContact;
import pl.edu.mimuw.cloudatlas.model.Value;
import pl.edu.mimuw.cloudatlas.model.ValueQuery;
import pl.edu.mimuw.cloudatlas.model.ValueSet;
import pl.edu.mimuw.cloudatlas.model.ValueNull;
import pl.edu.mimuw.cloudatlas.model.Type;
import pl.edu.mimuw.cloudatlas.model.TypePrimitive;
import pl.edu.mimuw.cloudatlas.model.ZMI;
import pl.edu.mimuw.cloudatlas.api.Api;
public class ApiImplementation implements Api {
ZMI root;
Set<ValueContact> contacts;
public ApiImplementation(ZMI root) {
this.root = root;
this.contacts = new HashSet<ValueContact>();
}
public Set<String> getZoneSet() throws RemoteException {
Set<String> zones = new HashSet<String>();
collectZoneNames(root, zones);
return zones;
}
private void collectZoneNames(ZMI zone, Set<String> names) {
names.add(zone.getPathName().toString());
for (ZMI son : zone.getSons()) {
collectZoneNames(son, names);
}
}
public AttributesMap getZoneAttributeValues(String zoneName) throws RemoteException {
try {
ZMI zmi = root.findDescendant(new PathName(zoneName));
return zmi.getAttributes();
} catch (ZMI.NoSuchZoneException e) {
throw new RemoteException("Zone not found", e);
}
}
public void installQuery(String name, String queryCode) throws RemoteException {
Pattern queryNamePattern = Pattern.compile("&[a-zA-Z][\\w_]*");
Matcher matcher = queryNamePattern.matcher(name);
if (!matcher.matches()) {
throw new RemoteException("Invalid query identifier");
}
try {
ValueQuery query = new ValueQuery(queryCode);
Attribute attributeName = new Attribute(name);
installQueryInHierarchy(root, attributeName, query);
executeAllQueries(root);
} catch (Exception e) {
throw new RemoteException("Failed to install query", e);
}
}
private void installQueryInHierarchy(ZMI zmi, Attribute queryName, ValueQuery query) {
if (!zmi.getSons().isEmpty()) {
zmi.getAttributes().addOrChange(queryName, query);
for (ZMI son : zmi.getSons()) {
installQueryInHierarchy(son, queryName, query);
}
}
}
public void uninstallQuery(String queryName) throws RemoteException {
uninstallQueryInHierarchy(root, new Attribute(queryName));
}
private void uninstallQueryInHierarchy(ZMI zmi, Attribute queryName) {
if (!zmi.getSons().isEmpty()) {
zmi.getAttributes().remove(queryName);
for (ZMI son : zmi.getSons()) {
uninstallQueryInHierarchy(son, queryName);
}
}
}
public void setAttributeValue(String zoneName, String attributeName, Value value) throws RemoteException {
try {
ZMI zmi = root.findDescendant(new PathName(zoneName));
zmi.getAttributes().addOrChange(new Attribute(attributeName), value);
executeAllQueries(root);
} catch (ZMI.NoSuchZoneException e) {
throw new RemoteException("Zone not found", e);
}
}
private void executeAllQueries(ZMI zmi) {
if(!zmi.getSons().isEmpty()) {
for(ZMI son : zmi.getSons()) {
executeAllQueries(son);
}
Interpreter interpreter = new Interpreter(zmi);
for (ValueQuery query : getQueries(zmi)) {
try {
List<QueryResult> result = interpreter.interpretProgram(query.getQuery());
for(QueryResult r : result) {
zmi.getAttributes().addOrChange(r.getName(), r.getValue());
}
} catch(InterpreterException exception) {}
}
}
}
private Set<ValueQuery> getQueries(ZMI zmi) {
Set<ValueQuery> querySet = new HashSet<ValueQuery>();
for (Map.Entry<Attribute, Value> attribute : zmi.getAttributes()) {
if (attribute.getValue().getType().getPrimaryType() == Type.PrimaryType.QUERY) {
querySet.add((ValueQuery) attribute.getValue());
}
}
return querySet;
}
public void setFallbackContacts(Set<ValueContact> contacts) throws RemoteException {
this.contacts = contacts;
}
}
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