| /* |
| * Copyright 2000-2010 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.roots.impl; |
| |
| import com.intellij.openapi.Disposable; |
| import com.intellij.openapi.roots.OrderRootType; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import com.intellij.openapi.vfs.pointers.VirtualFilePointerContainer; |
| import com.intellij.openapi.vfs.pointers.VirtualFilePointerManager; |
| import com.intellij.util.containers.StripedLockConcurrentHashMap; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.Collection; |
| import java.util.Map; |
| |
| /** |
| * @author nik |
| */ |
| public class OrderRootsCache { |
| private final Map<CacheKey, VirtualFilePointerContainer> myRoots = new StripedLockConcurrentHashMap<CacheKey, VirtualFilePointerContainer>(); |
| private final Disposable myParentDisposable; |
| |
| public OrderRootsCache(@NotNull Disposable parentDisposable) { |
| myParentDisposable = parentDisposable; |
| } |
| |
| public VirtualFilePointerContainer setCachedRoots(OrderRootType rootType, int flags, Collection<String> urls) { |
| final VirtualFilePointerContainer container = VirtualFilePointerManager.getInstance().createContainer(myParentDisposable); |
| for (String url : urls) { |
| container.add(url); |
| } |
| myRoots.put(new CacheKey(rootType, flags), container); |
| return container; |
| } |
| |
| @Nullable |
| public VirtualFile[] getCachedRoots(OrderRootType rootType, int flags) { |
| final VirtualFilePointerContainer cached = myRoots.get(new CacheKey(rootType, flags)); |
| return cached == null ? null : cached.getFiles(); |
| } |
| |
| @Nullable |
| public String[] getCachedUrls(OrderRootType rootType, int flags) { |
| final VirtualFilePointerContainer cached = myRoots.get(new CacheKey(rootType, flags)); |
| return cached != null ? cached.getUrls() : null; |
| } |
| |
| public void clearCache() { |
| for (VirtualFilePointerContainer container : myRoots.values()) { |
| container.killAll(); |
| } |
| myRoots.clear(); |
| } |
| |
| private static final class CacheKey { |
| private final OrderRootType myRootType; |
| private final int myFlags; |
| |
| private CacheKey(OrderRootType rootType, int flags) { |
| myRootType = rootType; |
| myFlags = flags; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| |
| CacheKey cacheKey = (CacheKey)o; |
| return myFlags == cacheKey.myFlags && myRootType.equals(cacheKey.myRootType); |
| |
| } |
| |
| @Override |
| public int hashCode() { |
| return 31 * myRootType.hashCode() + myFlags; |
| } |
| } |
| } |