/*
* 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.examples.ml.math.vector;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Arrays;
import org.apache.ignite.ml.math.VectorStorage;
import org.apache.ignite.ml.math.impls.storage.vector.ArrayVectorStorage;
/**
* Example vector storage, modeled after {@link ArrayVectorStorage}.
*/
class ExampleVectorStorage implements VectorStorage {
/** */
private double[] data;
/**
* IMPL NOTE required by Externalizable.
*/
public ExampleVectorStorage() {
// No-op.
}
/**
* @param data Backing data array.
*/
ExampleVectorStorage(double[] data) {
assert data != null;
this.data = data;
}
/** {@inheritDoc} */
@Override public int size() {
return data == null ? 0 : data.length;
}
/** {@inheritDoc} */
@Override public double get(int i) {
return data[i];
}
/** {@inheritDoc} */
@Override public void set(int i, double v) {
data[i] = v;
}
/** {@inheritDoc}} */
@Override public boolean isArrayBased() {
return true;
}
/** {@inheritDoc} */
@Override public double[] data() {
return data;
}
/** {@inheritDoc} */
@Override public boolean isSequentialAccess() {
return true;
}
/** {@inheritDoc} */
@Override public boolean isDense() {
return true;
}
/** {@inheritDoc} */
@Override public boolean isRandomAccess() {
return true;
}
/** {@inheritDoc} */
@Override public boolean isDistributed() {
return false;
}
/** {@inheritDoc} */
@Override public void writeExternal(ObjectOutput out) throws IOException {
out.writeObject(data);
}
/** {@inheritDoc} */
@Override public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
data = (double[])in.readObject();
}
/** {@inheritDoc} */
@Override public int hashCode() {
int res = 1;
res = res * 37 + Arrays.hashCode(data);
return res;
}
/** {@inheritDoc} */
@Override public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null || getClass() != obj.getClass())
return false;
ExampleVectorStorage that = (ExampleVectorStorage)obj;
return Arrays.equals(data, (that.data));
}
}