org.springframework.cloud.gcp.data.datastore.core.util.SliceUtil Maven / Gradle / Ivy
/*
* Copyright 2018-2018 the original author or authors.
*
* 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
*
* 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.
*/
package org.springframework.cloud.gcp.data.datastore.core.util;
import java.util.Arrays;
import java.util.function.Consumer;
/**
* @author Dmitry Solomakha
*
* @since 1.2
*/
public final class SliceUtil {
private SliceUtil() {
}
/**
* Cut array into slices of a given size and call consumer on each of them.
* @param the type of the elements.
* @param elements the array to be sliced.
* @param sliceSize the max size of a slice.
* @param consumer the consumer to be called on every slice.
*/
public static void sliceAndExecute(T[] elements, int sliceSize, Consumer consumer) {
int num_slices = (int) (Math.ceil((double) elements.length / sliceSize));
for (int i = 0; i < num_slices; i++) {
int start = i * sliceSize;
int end = Math.min(start + sliceSize, elements.length);
T[] slice = Arrays.copyOfRange(elements, start, end);
consumer.accept(slice);
}
}
}