/*
* 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 org.eclipse.emf.ecore.EObject;
import org.eclipse.xtext.scoping.impl.ImportUriResolver;
import com.google.eclipse.protobuf.protobuf.Import;
import com.google.inject.Inject;
/**
* This implementation mimics how protoc understands URIs of imported files. For example, the URI
* "platform:/resource/proto1.proto" is understood by EMF but not by protoc. The URI in the proto file needs to be
* simply "proto1.proto" for protoc to understand it.
* <p>
* This {@link ImportUriResolver} adds "platform:/resource" to any URI if is not specified, so EMF can find the imported
* resource.
* </p>
*
* @author alruiz@google.com (Alex Ruiz)
*/
public class ProtobufImportUriResolver extends ImportUriResolver {
@Inject private IFileUriResolver delegate;
/**
* If the given {@code EObject} is a <code>{@link Import}</code>, this method will add "platform:/resource" to the URI
* of such import if not specified already.
* @param from the given element to resolve.
* @return the {@code String} representation of the given object's {@code URI}.
*/
@Override public String apply(EObject from) {
if (from instanceof Import) {
Import anImport = (Import) from;
delegate.resolveAndUpdateUri(anImport);
}
return super.apply(from);
}
}