com.hazelcast.util.collection.ArrayUtils Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, Hazelcast, Inc. 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.
*/
package com.hazelcast.util.collection;
import java.util.Arrays;
/**
* Convenient method for array manipulations.
*
*/
public final class ArrayUtils {
private ArrayUtils() {
}
/**
* Create copy of the src array.
*
* @param src
* @param
* @return copy of the original array
*/
public static T[] createCopy(T[] src) {
return Arrays.copyOf(src, src.length);
}
/**
* Copy src array into destination and skip null values.
* Warning: It does not do any validation. It expect the dst[] is
* created with right capacity.
*
* You can calculate required capacity as src.length - getNoOfNullItems(src)
*
* @param src source array
* @param dst destination. It has to have the right capacity
* @param
*/
public static void copyWithoutNulls(T[] src, T[] dst) {
int skipped = 0;
for (int i = 0; i < src.length; i++) {
T object = src[i];
if (object == null) {
skipped++;
} else {
dst[i - skipped] = object;
}
}
}
public static boolean contains(T[] array, T item) {
for (T o : array) {
if (o == null) {
if (item == null) {
return true;
}
} else {
if (o.equals(item)) {
return true;
}
}
}
return false;
}
public static T getItemAtPositionOrNull(T[] array, int position) {
if (array.length > position) {
return array[position];
}
return null;
}
}