com.google.idea.blaze.base.util.SerializationUtil.java Source code

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Here is the source code for com.google.idea.blaze.base.util.SerializationUtil.java

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/*
 * 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 com.intellij.openapi.diagnostic.Logger;
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 org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/** Utils for serialization. */
public class SerializationUtil {
    private static final Logger LOG = Logger.getInstance(SerializationUtil.class.getName());

    public static void saveToDisk(@NotNull File file, @NotNull 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);
        }
    }

    @Nullable
    public static Object loadFromDisk(@NotNull File file, @NotNull final Iterable<ClassLoader> classLoaders)
            throws IOException {
        try {
            FileInputStream fin = null;
            try {
                if (!file.exists()) {
                    return null;
                }
                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 (Object) ois.readObject();
                } finally {
                    Closeables.close(ois, false);
                }
            } finally {
                Closeables.close(fin, false);
            }
        } catch (ClassNotFoundException e) {
            throw new IOException(e);
        } catch (ClassCastException e) {
            throw new IOException(e);
        }
    }

    private static void ensureExists(@NotNull File dir) throws IOException {
        if (!dir.exists() && !dir.mkdirs()) {
            throw new IOException(CommonBundle.message("exception.directory.can.not.create", dir.getPath()));
        }
    }
}