/*
* 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.emptyList;
import static org.eclipse.xtext.resource.EObjectDescription.create;
import static com.google.common.collect.Sets.newHashSet;
import java.util.Collection;
import java.util.Set;
import org.eclipse.xtext.resource.IEObjectDescription;
import com.google.eclipse.protobuf.model.util.MessageFields;
import com.google.eclipse.protobuf.model.util.Messages;
import com.google.eclipse.protobuf.model.util.Options;
import com.google.eclipse.protobuf.naming.OptionNamingStrategy;
import com.google.eclipse.protobuf.protobuf.IndexedElement;
import com.google.eclipse.protobuf.protobuf.Message;
import com.google.eclipse.protobuf.protobuf.MessageElement;
import com.google.eclipse.protobuf.protobuf.MessageField;
import com.google.eclipse.protobuf.protobuf.TypeExtension;
import com.google.inject.Inject;
/**
* @author alruiz@google.com (Alex Ruiz)
*/
class ExtensionFieldFinderStrategy implements CustomOptionFieldFinder.FinderStrategy {
@Inject private MessageFields messageFields;
@Inject private Messages messages;
@Inject private OptionNamingStrategy namingStrategy;
@Inject private Options options;
@Inject private QualifiedNameDescriptions qualifiedNameDescriptions;
@Override public Collection<IEObjectDescription> findOptionFields(IndexedElement reference) {
if (!(reference instanceof MessageField)) {
return emptyList();
}
Message fieldType = messageFields.messageTypeOf((MessageField) reference);
if (fieldType == null) {
return emptyList();
}
Set<IEObjectDescription> descriptions = newHashSet();
for (TypeExtension extension : messages.localExtensionsOf(fieldType)) {
for (MessageElement element : extension.getElements()) {
if (!(element instanceof IndexedElement)) {
continue;
}
IndexedElement current = (IndexedElement) element;
descriptions.addAll(qualifiedNameDescriptions.qualifiedNames(current, namingStrategy));
String name = options.nameForOption(current);
descriptions.add(create(name, current));
}
}
return descriptions;
}
}