/*
* 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 org.apache.ignite.ml.math.impls.vector;
import java.io.Externalizable;
import org.apache.ignite.ml.math.Matrix;
import org.apache.ignite.ml.math.Vector;
import org.apache.ignite.ml.math.VectorStorage;
import org.apache.ignite.ml.math.exceptions.UnsupportedOperationException;
import org.apache.ignite.ml.math.impls.storage.vector.DelegateVectorStorage;
/**
* Implements the partial view into the parent {@link Vector}.
*/
public class VectorView extends AbstractVector {
/**
* Constructor for {@link Externalizable} interface.
*/
public VectorView() {
// No-op.
}
/**
* @param parent Backing parent {@link Vector}.
* @param off Offset to parent vector.
* @param len Size of the view.
*/
public VectorView(Vector parent, int off, int len) {
super(new DelegateVectorStorage(parent.getStorage(), off, len));
}
/**
* @param sto Backing parent {@link VectorStorage}.
* @param off Offset to parent vector.
* @param len Size of the view.
*/
public VectorView(VectorStorage sto, int off, int len) {
super(new DelegateVectorStorage(sto, off, len));
}
/** */
private DelegateVectorStorage storage() {
return (DelegateVectorStorage)getStorage();
}
/** {@inheritDoc} */
@Override public Vector copy() {
DelegateVectorStorage sto = storage();
return new VectorView(sto.delegate(), sto.offset(), sto.length());
}
/** {@inheritDoc} */
@Override public Vector like(int crd) {
throw new UnsupportedOperationException();
}
/** {@inheritDoc} */
@Override public Matrix likeMatrix(int rows, int cols) {
throw new UnsupportedOperationException();
}
/** {@inheritDoc} */
@Override public boolean equals(Object o) {
return this == o ||
((o != null)
&& o.getClass() == getClass()
&& (getStorage().equals(((VectorView)o).getStorage())));
}
}