blob: 7bba7665a0bb2490587b45beff9656e82f2dbdd7 [file] [log] [blame]
/*
* 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 ml.dmlc.mxnet
import java.io._
import java.nio.ByteBuffer
import java.nio.charset.Charset
import org.apache.commons.codec.binary.Base64
import scala.reflect.ClassTag
/**
* Serialize & deserialize Java/Scala [[Serializable]] objects
*/
private[mxnet] abstract class Serializer {
def serialize[T: ClassTag](t: T): ByteBuffer
def deserialize[T: ClassTag](bytes: ByteBuffer): T
}
private[mxnet] object Serializer {
val UTF8 = Charset.forName("UTF-8")
def getSerializer: Serializer = getSerializer(None)
def getSerializer(serializer: Serializer): Serializer = {
// TODO: dynamically get from mxnet env to support other serializers like Kyro
if (serializer == null) new JavaSerializer else serializer
}
def getSerializer(serializer: Option[Serializer]): Serializer = {
// TODO: dynamically get from mxnet env to support other serializers like Kyro
serializer.getOrElse(new JavaSerializer)
}
def encodeBase64String(bytes: ByteBuffer): String = {
new String(Base64.encodeBase64(bytes.array), UTF8)
}
def decodeBase64String(str: String): ByteBuffer = {
ByteBuffer.wrap(Base64.decodeBase64(str.getBytes(UTF8)))
}
}
private[mxnet] class JavaSerializer extends Serializer {
override def serialize[T: ClassTag](t: T): ByteBuffer = {
val bos = new ByteArrayOutputStream()
val out = new ObjectOutputStream(bos)
out.writeObject(t)
out.close()
ByteBuffer.wrap(bos.toByteArray)
}
override def deserialize[T: ClassTag](bytes: ByteBuffer): T = {
val byteArray = bytes.array()
val bis = new ByteArrayInputStream(byteArray)
val in = new ObjectInputStream(bis)
in.readObject().asInstanceOf[T]
}
}