org.tensorics.core.iterable.operations.IterableSize Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of tensorics-core Show documentation
Show all versions of tensorics-core Show documentation
Tensorics is a java framework which uses a tensor as a central object. A tensor represents a set of values placed in an N-dimensional space. Wherever you are tempted to use maps of maps, a tensor might be a good choice ;-) Tensorics provides methods to create, transform and performing calculations with those tensors.
// @formatter:off
/*******************************************************************************
*
* This file is part of tensorics.
*
* Copyright (c) 2008-2011, CERN. All rights reserved.
*
* Licensed 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.
*
******************************************************************************/
// @formatter:on
package org.tensorics.core.iterable.operations;
import org.tensorics.core.math.ExtendedField;
import org.tensorics.core.scalar.lang.ScalarSupport;
/**
* An operation which counts the number of entries in an iterable and returns a scalar, corresponding to the count.
*
* @author kfuchsbe
* @param the type of the elements of the field.
*/
public class IterableSize extends ScalarSupport implements IterableOperation {
public IterableSize(ExtendedField field) {
super(field);
}
@Override
public V apply(Iterable iterable) {
V one = one();
V count = zero();
for (@SuppressWarnings("unused")
V value : iterable) {
count = calculate(count).plus(one);
}
return count;
}
}