| /* |
| * 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.naming; |
| |
| import static org.eclipse.xtext.util.SimpleAttributeResolver.NAME_RESOLVER; |
| |
| import static com.google.eclipse.protobuf.grammar.CommonKeyword.DEFAULT; |
| |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.emf.ecore.EStructuralFeature; |
| |
| import com.google.eclipse.protobuf.protobuf.DefaultValueFieldOption; |
| import com.google.inject.Singleton; |
| |
| /** |
| * Resolves names of elements in the protobuf grammar. |
| * |
| * @author alruiz@google.com (Alex Ruiz) |
| */ |
| @Singleton public class NameResolver { |
| /** |
| * Returns the name of the given element. |
| * @param o the given element. |
| * @return the name of the given element, or {@code null} if the given element does not have support for naming. |
| */ |
| public String nameOf(EObject o) { |
| if (o == null) { |
| return null; |
| } |
| if (o instanceof DefaultValueFieldOption) { |
| return DEFAULT.toString(); |
| } |
| Object value = nameFeatureOf(o); |
| return (String) value; |
| } |
| |
| private Object nameFeatureOf(EObject e) { |
| EStructuralFeature feature = NAME_RESOLVER.getAttribute(e); |
| return (feature != null) ? e.eGet(feature) : null; |
| } |
| } |