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/*
* Copyright 2000-2014 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.openapi.vfs.ex.dummy;
import com.intellij.openapi.Disposable;
import com.intellij.openapi.application.Application;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.project.ProjectManager;
import com.intellij.openapi.project.ProjectManagerAdapter;
import com.intellij.openapi.util.Disposer;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.util.containers.BidirectionalMap;
import com.intellij.util.containers.ConcurrentFactoryMap;
import com.intellij.util.containers.FactoryMap;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.annotations.TestOnly;
import java.io.IOException;
import java.util.Collection;
import java.util.List;
/**
* @author gregsh
*/
public abstract class DummyCachingFileSystem<T extends VirtualFile> extends DummyFileSystem {
private static final Logger LOG = Logger.getInstance("com.intellij.openapi.vfs.ex.dummy.DummyCachingFileSystem");
private final String myProtocol;
private final BidirectionalMap<Project, String> myProject2Id = new BidirectionalMap<Project, String>();
private final FactoryMap<String, T> myCachedFiles = new ConcurrentFactoryMap<String, T>() {
@Override
protected T create(String key) {
if (ApplicationManager.getApplication().isUnitTestMode()) {
//noinspection TestOnlyProblems
cleanup();
initProjectMap();
}
return findFileByPathInner(key);
}
@Override
public T get(Object key) {
T file = super.get(key);
if (file != null && !file.isValid()) {
remove(key);
return super.get(key);
}
return file;
}
};
public DummyCachingFileSystem(String protocol) {
myProtocol = protocol;
final Application application = ApplicationManager.getApplication();
application.getMessageBus().connect(application).subscribe(ProjectManager.TOPIC, new ProjectManagerAdapter() {
@Override
public void projectOpened(final Project project) {
onProjectOpened(project);
}
});
initProjectMap();
}
@NotNull
@Override
public final String getProtocol() {
return myProtocol;
}
@Override
@Nullable
public final VirtualFile createRoot(String name) {
return null;
}
@Override
public final T findFileByPath(@NotNull String path) {
return myCachedFiles.get(path);
}
@Override
@NotNull
public String extractPresentableUrl(@NotNull String path) {
VirtualFile file = findFileByPath(path);
return file != null ? getPresentableUrl(file) : super.extractPresentableUrl(path);
}
protected String getPresentableUrl(@NotNull VirtualFile file) {
return file.getPresentableName();
}
protected abstract T findFileByPathInner(@NotNull String path);
protected void doRenameFile(VirtualFile vFile, String newName) {
throw new UnsupportedOperationException("not implemented");
}
@Nullable
public Project getProject(String projectId) {
List<Project> list = myProject2Id.getKeysByValue(projectId);
return list == null || list.size() > 1 ? null : list.get(0);
}
@NotNull
public Collection<T> getCachedFiles() {
return myCachedFiles.notNullValues();
}
public void onProjectClosed(Project project) {
myProject2Id.remove(project);
clearCache();
}
public void onProjectOpened(final Project project) {
// use Disposer instead of ProjectManagerListener#projectClosed() because Disposer.dispose(project)
// is called later and some cached files should stay valid till the last moment
Disposer.register(project, new Disposable() {
@Override
public void dispose() {
onProjectClosed(project);
}
});
clearCache();
String projectId = project.getLocationHash();
myProject2Id.put(project, projectId);
List<Project> projects = myProject2Id.getKeysByValue(projectId);
if (projects != null && projects.size() > 1) {
LOG.error("project " + projectId + " already registered: " + projects);
}
}
private void initProjectMap() {
for (Project project : ProjectManager.getInstance().getOpenProjects()) {
if (project.isOpen()) onProjectOpened(project);
}
}
protected void clearCache() {
clearInvalidFiles();
}
protected void clearInvalidFiles() {
for (T t : myCachedFiles.notNullValues()) {
if (!t.isValid()) myCachedFiles.removeValue(t);
}
//noinspection StatementWithEmptyBody
while (myCachedFiles.removeValue(null)) ;
}
@TestOnly
public void cleanup() {
myCachedFiles.clear();
myProject2Id.clear();
}
@Override
public void renameFile(Object requestor, @NotNull VirtualFile vFile, @NotNull String newName) throws IOException {
String oldName = vFile.getName();
beforeFileRename(vFile, requestor, oldName, newName);
try {
doRenameFile(vFile, newName);
}
finally {
fileRenamed(vFile, requestor, oldName, newName);
}
}
protected void beforeFileRename(@NotNull VirtualFile file, Object requestor, @NotNull String oldName, @NotNull String newName) {
fireBeforePropertyChange(requestor, file, VirtualFile.PROP_NAME, oldName, newName);
myCachedFiles.remove(file.getPath());
}
protected void fileRenamed(@NotNull VirtualFile file, Object requestor, String oldName, String newName) {
//noinspection unchecked
myCachedFiles.put(file.getPath(), (T)file);
firePropertyChanged(requestor, file, VirtualFile.PROP_NAME, oldName, newName);
}
protected static String escapeSlash(String name) {
return name == null ? "" : StringUtil.replace(name, "/", "&slash;");
}
protected static String unescapeSlash(String name) {
return name == null ? "" : StringUtil.replace(name, "&slash;", "/");
}
}
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