/*
* 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 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.emf.ecore.EObject;
import org.eclipse.xtext.resource.IEObjectDescription;
import com.google.eclipse.protobuf.model.util.MessageFields;
import com.google.eclipse.protobuf.model.util.Options;
import com.google.eclipse.protobuf.protobuf.Group;
import com.google.eclipse.protobuf.protobuf.GroupElement;
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.inject.Inject;
/**
* @author alruiz@google.com (Alex Ruiz)
*/
class MessageFieldFinderStrategy implements CustomOptionFieldFinder.FinderStrategy {
@Inject private MessageFields messageFields;
@Inject private Options options;
@Override public Collection<IEObjectDescription> findOptionFields(IndexedElement reference) {
Set<IEObjectDescription> descriptions = newHashSet();
if (reference instanceof MessageField) {
Message fieldType = messageFields.messageTypeOf((MessageField) reference);
for (MessageElement element : fieldType.getElements()) {
IEObjectDescription d = describe(element);
if (d != null) {
descriptions.add(d);
}
}
}
if (reference instanceof Group) {
for (GroupElement element : ((Group) reference).getElements()) {
IEObjectDescription d = describe(element);
if (d != null) {
descriptions.add(d);
}
}
}
return descriptions;
}
private IEObjectDescription describe(EObject e) {
if (!(e instanceof IndexedElement)) {
return null;
}
String name = options.nameForOption((IndexedElement) e);
return create(name, e);
}
}