/*
* Copyright (c) 2011 Google Inc.
*
* All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse
* Public License v1.0 which accompanies this distribution, and is available at
*
* http://www.eclipse.org/legal/epl-v10.html
*/
package com.google.eclipse.protobuf.scoping;
import static java.util.Collections.emptySet;
import static org.eclipse.xtext.resource.EObjectDescription.create;
import static com.google.common.collect.Sets.newHashSet;
import java.util.Collection;
import java.util.List;
import java.util.Set;
import org.eclipse.xtext.naming.QualifiedName;
import org.eclipse.xtext.resource.IEObjectDescription;
import com.google.eclipse.protobuf.model.util.TypeExtensions;
import com.google.eclipse.protobuf.naming.LocalNamesProvider;
import com.google.eclipse.protobuf.naming.OptionNamingStrategy;
import com.google.eclipse.protobuf.protobuf.Import;
import com.google.eclipse.protobuf.protobuf.Message;
import com.google.eclipse.protobuf.protobuf.MessageElement;
import com.google.eclipse.protobuf.protobuf.Package;
import com.google.eclipse.protobuf.protobuf.TypeExtension;
import com.google.inject.Inject;
/**
* @author alruiz@google.com (Alex Ruiz)
*/
class CustomOptionFinderStrategy implements ModelElementFinder.FinderStrategy<OptionType> {
@Inject private LocalNamesProvider localNamesProvider;
@Inject private OptionNamingStrategy namingStrategy;
@Inject private QualifiedNameDescriptions qualifiedNamesDescriptions;
@Inject private TypeExtensions typeExtensions;
@Override public Collection<IEObjectDescription> imported(Package fromImporter, Package fromImported, Object target,
OptionType optionType) {
if (!isExtendingOptionMessage(target, optionType)) {
return emptySet();
}
Set<IEObjectDescription> descriptions = newHashSet();
TypeExtension extension = (TypeExtension) target;
for (MessageElement e : extension.getElements()) {
descriptions.addAll(qualifiedNamesDescriptions.qualifiedNames(e, namingStrategy));
}
return descriptions;
}
@Override public Collection<IEObjectDescription> inDescriptor(Import anImport, OptionType criteria) {
return emptySet();
}
@Override public Collection<IEObjectDescription> local(Object target, OptionType optionType, int level) {
if (!isExtendingOptionMessage(target, optionType)) {
return emptySet();
}
Set<IEObjectDescription> descriptions = newHashSet();
TypeExtension extension = (TypeExtension) target;
for (MessageElement e : extension.getElements()) {
List<QualifiedName> names = localNamesProvider.localNames(e, namingStrategy);
int nameCount = names.size();
for (int i = level; i < nameCount; i++) {
descriptions.add(create(names.get(i), e));
}
descriptions.addAll(qualifiedNamesDescriptions.qualifiedNames(e, namingStrategy));
}
return descriptions;
}
private boolean isExtendingOptionMessage(Object o, OptionType optionType) {
if (!(o instanceof TypeExtension)) {
return false;
}
Message message = typeExtensions.messageFrom((TypeExtension) o);
if (message == null) {
return false;
}
String name = message.getName();
return optionType.messageName().equals(name);
}
}