| /* |
| * 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.impl; |
| |
| import com.intellij.openapi.Disposable; |
| import com.intellij.openapi.application.ApplicationManager; |
| import com.intellij.openapi.application.impl.ApplicationInfoImpl; |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.util.InvalidDataException; |
| import com.intellij.openapi.util.TraceableDisposable; |
| import com.intellij.openapi.util.Trinity; |
| import com.intellij.openapi.vfs.VfsUtilCore; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import com.intellij.openapi.vfs.pointers.VirtualFilePointer; |
| import com.intellij.openapi.vfs.pointers.VirtualFilePointerContainer; |
| import com.intellij.openapi.vfs.pointers.VirtualFilePointerListener; |
| import com.intellij.openapi.vfs.pointers.VirtualFilePointerManager; |
| import com.intellij.util.ArrayUtil; |
| import com.intellij.util.containers.ContainerUtil; |
| import org.jdom.Element; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * @author dsl |
| */ |
| public class VirtualFilePointerContainerImpl extends TraceableDisposable implements VirtualFilePointerContainer, Disposable { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.vfs.pointers.VirtualFilePointerContainer"); |
| @NotNull private final List<VirtualFilePointer> myList = ContainerUtil.createLockFreeCopyOnWriteList(); |
| @NotNull private final VirtualFilePointerManager myVirtualFilePointerManager; |
| @NotNull private final Disposable myParent; |
| private final VirtualFilePointerListener myListener; |
| private volatile Trinity<String[], VirtualFile[], VirtualFile[]> myCachedThings; |
| private volatile long myTimeStampOfCachedThings = -1; |
| @NonNls public static final String URL_ATTR = "url"; |
| private boolean myDisposed; |
| private static final boolean TRACE_CREATION = LOG.isDebugEnabled() || ApplicationManager.getApplication().isUnitTestMode(); |
| public VirtualFilePointerContainerImpl(@NotNull VirtualFilePointerManager manager, |
| @NotNull Disposable parentDisposable, |
| @Nullable VirtualFilePointerListener listener) { |
| //noinspection HardCodedStringLiteral |
| super(TRACE_CREATION && !ApplicationInfoImpl.isInPerformanceTest() |
| ? new Throwable("parent = '" + parentDisposable + "' (" + parentDisposable.getClass() + "); listener=" + listener) |
| : null); |
| myVirtualFilePointerManager = manager; |
| myParent = parentDisposable; |
| myListener = listener; |
| } |
| |
| @Override |
| public void readExternal(@NotNull final Element rootChild, @NotNull final String childElements) throws InvalidDataException { |
| final List urls = rootChild.getChildren(childElements); |
| for (Object url : urls) { |
| Element pathElement = (Element)url; |
| final String urlAttribute = pathElement.getAttributeValue(URL_ATTR); |
| if (urlAttribute == null) throw new InvalidDataException("path element without url"); |
| add(urlAttribute); |
| } |
| } |
| |
| @Override |
| public void writeExternal(@NotNull final Element element, @NotNull final String childElementName) { |
| for (VirtualFilePointer pointer : myList) { |
| String url = pointer.getUrl(); |
| final Element rootPathElement = new Element(childElementName); |
| rootPathElement.setAttribute(URL_ATTR, url); |
| element.addContent(rootPathElement); |
| } |
| } |
| |
| @Override |
| public void moveUp(@NotNull String url) { |
| int index = indexOf(url); |
| if (index <= 0) return; |
| dropCaches(); |
| ContainerUtil.swapElements(myList, index - 1, index); |
| } |
| |
| @Override |
| public void moveDown(@NotNull String url) { |
| int index = indexOf(url); |
| if (index < 0 || index + 1 >= myList.size()) return; |
| dropCaches(); |
| ContainerUtil.swapElements(myList, index, index + 1); |
| } |
| |
| private int indexOf(@NotNull final String url) { |
| for (int i = 0; i < myList.size(); i++) { |
| final VirtualFilePointer pointer = myList.get(i); |
| if (url.equals(pointer.getUrl())) { |
| return i; |
| } |
| } |
| |
| return -1; |
| } |
| |
| @Override |
| public void killAll() { |
| myList.clear(); |
| } |
| |
| @Override |
| public void add(@NotNull VirtualFile file) { |
| assert !myDisposed; |
| dropCaches(); |
| final VirtualFilePointer pointer = create(file); |
| myList.add(pointer); |
| } |
| |
| @Override |
| public void add(@NotNull String url) { |
| assert !myDisposed; |
| dropCaches(); |
| final VirtualFilePointer pointer = create(url); |
| myList.add(pointer); |
| } |
| |
| @Override |
| public void remove(@NotNull VirtualFilePointer pointer) { |
| assert !myDisposed; |
| dropCaches(); |
| final boolean result = myList.remove(pointer); |
| LOG.assertTrue(result); |
| } |
| |
| @Override |
| @NotNull |
| public List<VirtualFilePointer> getList() { |
| assert !myDisposed; |
| return Collections.unmodifiableList(myList); |
| } |
| |
| @Override |
| public void addAll(@NotNull VirtualFilePointerContainer that) { |
| assert !myDisposed; |
| dropCaches(); |
| |
| List<VirtualFilePointer> thatList = ((VirtualFilePointerContainerImpl)that).myList; |
| for (final VirtualFilePointer pointer : thatList) { |
| myList.add(duplicate(pointer)); |
| } |
| } |
| |
| private void dropCaches() { |
| myTimeStampOfCachedThings = -1; // make it never equal to myVirtualFilePointerManager.getModificationCount() |
| myCachedThings = EMPTY; |
| } |
| |
| @Override |
| @NotNull |
| public String[] getUrls() { |
| return getOrCache().first; |
| } |
| |
| @NotNull |
| private Trinity<String[], VirtualFile[], VirtualFile[]> getOrCache() { |
| assert !myDisposed; |
| long timeStamp = myTimeStampOfCachedThings; |
| Trinity<String[], VirtualFile[], VirtualFile[]> cached = myCachedThings; |
| return timeStamp == myVirtualFilePointerManager.getModificationCount() ? cached : cacheThings(); |
| } |
| |
| private static final Trinity<String[], VirtualFile[], VirtualFile[]> EMPTY = |
| Trinity.create(ArrayUtil.EMPTY_STRING_ARRAY, VirtualFile.EMPTY_ARRAY, VirtualFile.EMPTY_ARRAY); |
| |
| @NotNull |
| private Trinity<String[], VirtualFile[], VirtualFile[]> cacheThings() { |
| Trinity<String[], VirtualFile[], VirtualFile[]> result; |
| if (myList.isEmpty()) { |
| result = EMPTY; |
| } |
| else { |
| VirtualFilePointer[] vf = myList.toArray(new VirtualFilePointer[myList.size()]); |
| List<VirtualFile> cachedFiles = new ArrayList<VirtualFile>(vf.length); |
| List<String> cachedUrls = new ArrayList<String>(vf.length); |
| List<VirtualFile> cachedDirectories = new ArrayList<VirtualFile>(vf.length / 3); |
| boolean allFilesAreDirs = true; |
| for (VirtualFilePointer v : vf) { |
| VirtualFile file = v.getFile(); |
| String url = v.getUrl(); |
| cachedUrls.add(url); |
| if (file != null) { |
| cachedFiles.add(file); |
| if (file.isDirectory()) { |
| cachedDirectories.add(file); |
| } |
| else { |
| allFilesAreDirs = false; |
| } |
| } |
| } |
| VirtualFile[] directories = VfsUtilCore.toVirtualFileArray(cachedDirectories); |
| VirtualFile[] files = allFilesAreDirs ? directories : VfsUtilCore.toVirtualFileArray(cachedFiles); |
| String[] urlsArray = ArrayUtil.toStringArray(cachedUrls); |
| result = Trinity.create(urlsArray, files, directories); |
| } |
| myCachedThings = result; |
| myTimeStampOfCachedThings = myVirtualFilePointerManager.getModificationCount(); |
| return result; |
| } |
| |
| @Override |
| @NotNull |
| public VirtualFile[] getFiles() { |
| return getOrCache().second; |
| } |
| |
| @Override |
| @NotNull |
| public VirtualFile[] getDirectories() { |
| return getOrCache().third; |
| } |
| |
| @Override |
| @Nullable |
| public VirtualFilePointer findByUrl(@NotNull String url) { |
| assert !myDisposed; |
| for (VirtualFilePointer pointer : myList) { |
| if (url.equals(pointer.getUrl())) return pointer; |
| } |
| return null; |
| } |
| |
| @Override |
| public void clear() { |
| dropCaches(); |
| killAll(); |
| } |
| |
| @Override |
| public int size() { |
| return myList.size(); |
| } |
| |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (!(o instanceof VirtualFilePointerContainerImpl)) return false; |
| |
| final VirtualFilePointerContainerImpl virtualFilePointerContainer = (VirtualFilePointerContainerImpl)o; |
| |
| return myList.equals(virtualFilePointerContainer.myList); |
| } |
| |
| public int hashCode() { |
| return myList.hashCode(); |
| } |
| |
| protected VirtualFilePointer create(@NotNull VirtualFile file) { |
| return myVirtualFilePointerManager.create(file, myParent, myListener); |
| } |
| |
| protected VirtualFilePointer create(@NotNull String url) { |
| return myVirtualFilePointerManager.create(url, myParent, myListener); |
| } |
| |
| protected VirtualFilePointer duplicate(@NotNull VirtualFilePointer virtualFilePointer) { |
| return myVirtualFilePointerManager.duplicate(virtualFilePointer, myParent, myListener); |
| } |
| |
| @NotNull |
| @NonNls |
| @Override |
| public String toString() { |
| return "VFPContainer: " + myList/*+"; parent:"+myParent*/; |
| } |
| |
| @Override |
| @NotNull |
| public VirtualFilePointerContainer clone(@NotNull Disposable parent) { |
| return clone(parent, null); |
| } |
| |
| @Override |
| @NotNull |
| public VirtualFilePointerContainer clone(@NotNull Disposable parent, @Nullable VirtualFilePointerListener listener) { |
| assert !myDisposed; |
| VirtualFilePointerContainer clone = myVirtualFilePointerManager.createContainer(parent, listener); |
| for (VirtualFilePointer pointer : myList) { |
| clone.add(pointer.getUrl()); |
| } |
| return clone; |
| } |
| |
| @Override |
| public void dispose() { |
| assert !myDisposed; |
| myDisposed = true; |
| kill(null); |
| } |
| } |