| /* |
| * 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.ui.scoping; |
| |
| import static org.eclipse.core.runtime.IPath.SEPARATOR; |
| import static org.eclipse.emf.common.util.URI.createURI; |
| |
| import org.eclipse.emf.common.util.URI; |
| |
| import com.google.eclipse.protobuf.ui.preferences.paths.PathsPreferences; |
| import com.google.eclipse.protobuf.util.Uris; |
| import com.google.inject.Inject; |
| |
| /** |
| * @author alruiz@google.com (Alex Ruiz) |
| */ |
| class SingleDirectoryFileResolverStrategy implements FileResolverStrategy { |
| @Inject private Uris uris; |
| |
| @Override |
| public String resolveUri(String importUri, URI declaringResourceUri, Iterable<PathsPreferences> allPathPreferences) { |
| return resolveUri(createURI(importUri), declaringResourceUri); |
| } |
| |
| private String resolveUri(URI importUri, URI declaringResourceUri) { |
| StringBuilder pathBuilder = new StringBuilder(); |
| String[] segments = importUri.segments(); |
| if (segments.length == 0) { |
| return null; |
| } |
| String firstSegment = segments[0]; |
| for (String segment : uris.segmentsWithoutFileName(declaringResourceUri)) { |
| if (segment.equals(firstSegment)) { |
| break; |
| } |
| pathBuilder.append(segment).append(SEPARATOR); |
| } |
| String resolved = createResolvedUri(pathBuilder.toString(), importUri, declaringResourceUri); |
| return uris.referredResourceExists(createURI(resolved)) ? resolved : null; |
| } |
| |
| private String createResolvedUri(String path, URI importUri, URI declaringResourceUri) { |
| StringBuilder uriBuilder = new StringBuilder(); |
| return uriBuilder.append(uris.prefixOf(declaringResourceUri)) |
| .append(SEPARATOR) |
| .append(path) |
| .append(importUri.toString()) |
| .toString(); |
| } |
| } |