hivemall.utils.hadoop.SerdeUtils Maven / Gradle / Ivy
The newest version!
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 hivemall.utils.hadoop;
import hivemall.utils.io.FastByteArrayInputStream;
import hivemall.utils.io.FastByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.Objects;
import javax.annotation.CheckForNull;
import javax.annotation.Nonnull;
import org.roaringbitmap.RoaringBitmap;
public final class SerdeUtils {
@Nonnull
public static byte[] serializeRoaring(@Nonnull final RoaringBitmap r) {
r.runOptimize(); // might improve compression
// next we create the ByteBuffer where the data will be stored
final byte[] buf = new byte[r.serializedSizeInBytes()];
// then we can serialize on a custom OutputStream
try {
r.serialize(new DataOutputStream(new FastByteArrayOutputStream(buf)));
} catch (IOException e) {
throw new IllegalStateException("Failed to serialize RoaringBitmap", e);
}
return buf;
}
@Nonnull
public static RoaringBitmap deserializeRoaring(@CheckForNull final byte[] b) {
final RoaringBitmap bitmap = new RoaringBitmap();
try {
bitmap.deserialize(
new DataInputStream(new FastByteArrayInputStream(Objects.requireNonNull(b))));
} catch (IOException e) {
throw new IllegalStateException("Failed to deserialize RoaringBitmap", e);
}
return bitmap;
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy