Java Collection Subtract subCollection(final Collection collection, final int offset, final int limit)

Description

sub Collection

License

Apache License

Declaration

@SuppressWarnings("unchecked")
    public static <T> Collection<T> subCollection(final Collection<T> collection, final int offset,
            final int limit) 

Method Source Code

//package com.java2s;
/*/*w  w w  .  j  a  va2 s .  c o  m*/
 * Copyright 2002-2009 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
 * 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.
 */

import java.util.ArrayList;
import java.util.Collection;

import java.util.Map;

public class Main {
    @SuppressWarnings("unchecked")
    public static <T> Collection<T> subCollection(final Collection<T> collection, final int offset,
            final int limit) {
        if (collection == null || collection.isEmpty()) {
            return collection;
        }

        int start = offset;
        if (start > collection.size()) {
            start = collection.size();
        }

        int end = start + limit;
        if (end > collection.size()) {
            end = collection.size();
        }
        final Collection<T> returnCollection = new ArrayList<>();
        final T[] srcArray = (T[]) collection.toArray();

        for (int i = start; i < end; i++) {
            returnCollection.add(srcArray[i]);
        }
        return returnCollection;
    }

    public static boolean isEmpty(final Collection<?> collection) {
        return collection == null || collection.isEmpty();
    }

    public static boolean isEmpty(final Map<?, ?> map) {
        return map == null || map.isEmpty();
    }
}

Related

1. sub(Collection s, T item)
2. subCollection(Collection col, int amount)
3. subMap(Map map, Collection keys)
4. substractBackground( final Map> concentrationToSampleReadings, final Map> concentrationToBackgroundReadings)
5. subtract(Collection a, Collection b)
6. subtract(Collection c1, Collection c2)