org.nd4j.linalg.api.ndarray.BaseNDArrayProxy Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://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.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
package org.nd4j.linalg.api.ndarray;
import org.nd4j.linalg.api.buffer.DataBuffer;
import org.nd4j.linalg.factory.Nd4j;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
/**
* @author Susan Eraly
*/
public class BaseNDArrayProxy implements java.io.Serializable {
/**
* This is a proxy class so that ndarrays can be serialized and deserialized independent of the backend
* Be it cpu or gpu
*/
protected long[] arrayShape;
protected long length;
protected char arrayOrdering;
protected transient DataBuffer data;
public BaseNDArrayProxy(INDArray anInstance) {
if (anInstance.isView()) {
anInstance = anInstance.dup(anInstance.ordering());
}
this.arrayShape = anInstance.shape();
this.length = anInstance.length();
this.arrayOrdering = anInstance.ordering();
this.data = anInstance.data();
}
// READ DONE HERE - return an NDArray using the available backend
private Object readResolve() throws java.io.ObjectStreamException {
return Nd4j.create(data, arrayShape, Nd4j.getStrides(arrayShape, arrayOrdering), 0, arrayOrdering);
}
private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException {
try {
//Should have array shape and ordering here
s.defaultReadObject();
//Need to call deser explicitly on data buffer
read(s);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
//Custom deserialization for Java serialization
protected void read(ObjectInputStream s) throws IOException, ClassNotFoundException {
data = Nd4j.createBuffer(length, false);
data.read(s);
}
// WRITE DONE HERE
private void writeObject(ObjectOutputStream out) throws IOException {
//takes care of everything but data buffer
out.defaultWriteObject();
write(out);
}
//Custom serialization for Java serialization
protected void write(ObjectOutputStream out) throws IOException {
data.write(out);
}
}