| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.intellij.psi.impl.source.resolve.reference.impl.providers; |
| |
| import com.intellij.openapi.module.Module; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.roots.ModuleRootManager; |
| import com.intellij.openapi.roots.ProjectFileIndex; |
| import com.intellij.openapi.roots.ProjectRootManager; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import com.intellij.psi.PsiFileSystemItem; |
| import com.intellij.psi.PsiManager; |
| import com.intellij.util.Function; |
| import com.intellij.util.containers.ContainerUtil; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| |
| public class NullFileReferenceHelper extends FileReferenceHelper { |
| |
| public static final NullFileReferenceHelper INSTANCE = new NullFileReferenceHelper(); |
| |
| @Override |
| public PsiFileSystemItem findRoot(final Project project, @NotNull final VirtualFile file) { |
| final ProjectFileIndex index = ProjectRootManager.getInstance(project).getFileIndex(); |
| VirtualFile contentRootForFile = index.getContentRootForFile(file); |
| |
| return contentRootForFile != null ? PsiManager.getInstance(project).findDirectory(contentRootForFile) : null; |
| } |
| |
| @Override |
| @NotNull |
| public Collection<PsiFileSystemItem> getRoots(@NotNull final Module module) { |
| return ContainerUtil.mapNotNull(ModuleRootManager.getInstance(module).getContentRoots(), new Function<VirtualFile, PsiFileSystemItem>() { |
| @Override |
| public PsiFileSystemItem fun(VirtualFile virtualFile) { |
| return PsiManager.getInstance(module.getProject()).findDirectory(virtualFile); |
| } |
| }); |
| } |
| |
| @Override |
| @NotNull |
| public Collection<PsiFileSystemItem> getContexts(final Project project, @NotNull final VirtualFile file) { |
| final PsiFileSystemItem item = getPsiFileSystemItem(project, file); |
| if (item != null) { |
| final PsiFileSystemItem parent = item.getParent(); |
| if (parent != null) { |
| return Collections.singleton(parent); |
| } |
| } |
| return Collections.emptyList(); |
| } |
| |
| @Override |
| public boolean isMine(final Project project, @NotNull final VirtualFile file) { |
| return ProjectRootManager.getInstance(project).getFileIndex().isInContent(file); |
| } |
| |
| @Override |
| public boolean isFallback() { |
| return true; |
| } |
| } |