| /* |
| * Copyright 2016 The Bazel Authors. All rights reserved. |
| * |
| * 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.google.idea.blaze.base.util; |
| |
| import com.google.common.io.Closeables; |
| import com.intellij.CommonBundle; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.ObjectStreamClass; |
| import java.io.Serializable; |
| import javax.annotation.Nullable; |
| |
| /** Utils for serialization. */ |
| public class SerializationUtil { |
| |
| /** |
| * Write {@link Serializable} to disk. |
| * |
| * @throws IOException if serialization fails. |
| */ |
| public static void saveToDisk(File file, Serializable serializable) throws IOException { |
| ensureExists(file.getParentFile()); |
| FileOutputStream fos = null; |
| try { |
| fos = new FileOutputStream(file); |
| ObjectOutputStream oos = new ObjectOutputStream(fos); |
| try { |
| oos.writeObject(serializable); |
| } finally { |
| Closeables.close(oos, false); |
| } |
| } finally { |
| Closeables.close(fos, false); |
| } |
| } |
| |
| /** |
| * Read the serialized objects from disk. Returns null if the file doesn't exist or is empty. |
| * |
| * @throws IOException if deserialization fails. |
| */ |
| @Nullable |
| public static Object loadFromDisk(File file, final Iterable<ClassLoader> classLoaders) |
| throws IOException { |
| if (!file.exists()) { |
| return null; |
| } |
| try (FileInputStream fin = new FileInputStream(file)) { |
| ObjectInputStream ois = |
| new ObjectInputStream(fin) { |
| @Override |
| protected Class<?> resolveClass(ObjectStreamClass desc) |
| throws IOException, ClassNotFoundException { |
| String name = desc.getName(); |
| for (ClassLoader loader : classLoaders) { |
| try { |
| return Class.forName(name, false, loader); |
| } catch (ClassNotFoundException e) { |
| // Ignore - will throw eventually in super |
| } |
| } |
| return super.resolveClass(desc); |
| } |
| }; |
| try { |
| return ois.readObject(); |
| } finally { |
| Closeables.close(ois, false); |
| } |
| } catch (ClassNotFoundException | ClassCastException | IllegalStateException e) { |
| // rethrow as an IOException, handled by callers |
| throw new IOException(e); |
| } |
| } |
| |
| private static void ensureExists(File dir) throws IOException { |
| if (!dir.exists() && !dir.mkdirs()) { |
| throw new IOException( |
| CommonBundle.message("exception.directory.can.not.create", dir.getPath())); |
| } |
| } |
| } |