org.nd4j.autodiff.samediff.array.OptimizedGraphArrayHolder Maven / Gradle / Ivy
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/*
* ******************************************************************************
* *
* *
* * 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.
* *
* * See the NOTICE file distributed with this work for additional
* * information regarding copyright ownership.
* * 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.autodiff.samediff.array;
import org.nd4j.autodiff.samediff.ArrayHolder;
import org.nd4j.common.base.Preconditions;
import org.nd4j.common.function.Supplier;
import org.nd4j.linalg.api.ndarray.INDArray;
import java.util.*;
public class OptimizedGraphArrayHolder implements ArrayHolder {
private final ArrayHolder underlyingHolder;
private final Map> functions;
public OptimizedGraphArrayHolder(ArrayHolder underlyingHolder) {
this.underlyingHolder = underlyingHolder;
this.functions = new HashMap<>();
}
public void setFunction(String name, Supplier fn){
if(underlyingHolder.hasArray(name))
underlyingHolder.removeArray(name);
functions.put(name, fn);
}
@Override
public boolean hasArray(String name) {
return functions.containsKey(name) || underlyingHolder.hasArray(name);
}
@Override
public INDArray getArray(String name) {
if(functions.containsKey(name))
return functions.get(name).get();
return underlyingHolder.getArray(name);
}
@Override
public void setArray(String name, INDArray array) {
Preconditions.checkState(!functions.containsKey(name), "Cannot set array when existing array is only accessible via a function");
underlyingHolder.setArray(name, array);
}
@Override
public INDArray removeArray(String name) {
Supplier s = functions.remove(name);
if(s != null)
return s.get();
return underlyingHolder.removeArray(name);
}
@Override
public int size() {
return underlyingHolder.size() + functions.size();
}
@Override
public void initFrom(ArrayHolder arrayHolder) {
underlyingHolder.initFrom(arrayHolder);
}
@Override
public Collection arrayNames() {
Set set = new HashSet<>();
set.addAll(underlyingHolder.arrayNames());
set.addAll(functions.keySet());
return set;
}
@Override
public void rename(String from, String to) {
if(functions.containsKey(from)) {
functions.put(to, functions.remove(from));
} else {
underlyingHolder.rename(from, to);
}
}
}