Java Collection Copy copyIntoCollectionFrom(Collection collection, Iterable iterable)

Description

Copies all elements from the given Iterable into the given Collection

License

Apache License

Parameter

Parameter	Description
collection	a parameter
iterable	a parameter

Declaration

public static <E> void copyIntoCollectionFrom(Collection<E> collection, Iterable<E> iterable) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2011 Danny Kunz/*from www  .  ja  va  2 s .  co m*/
 * 
 * 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.Collection;
import java.util.Iterator;

public class Main {
    /**
     * Copies all elements from the given {@link Iterable} into the given {@link Collection}
     * 
     * @param collection
     * @param iterable
     */
    public static <E> void copyIntoCollectionFrom(Collection<E> collection, Iterable<E> iterable) {
        if (collection != null && iterable != null) {
            for (E element : iterable) {
                collection.add(element);
            }
        }
    }

    /**
     * Copies all elements from the given {@link Iterable} into the given {@link Collection}
     * 
     * @param collection
     * @param iterable
     * @param maxNumberOfElements
     */
    public static <E> void copyIntoCollectionFrom(Collection<E> collection, Iterable<E> iterable,
            int maxNumberOfElements) {
        if (collection != null && iterable != null) {
            //
            final Iterator<E> iterator = iterable.iterator();
            copyIntoCollectionFrom(collection, iterator, maxNumberOfElements);
        }
    }

    /**
     * Copies all elements from the given {@link Iterator} into the given {@link Collection} <br>
     * This traverses the {@link Iterator}
     * 
     * @param collection
     * @param iterator
     */
    public static <E> void copyIntoCollectionFrom(Collection<E> collection, Iterator<E> iterator) {
        if (collection != null && iterator != null) {
            while (iterator.hasNext()) {
                final E element = iterator.next();
                collection.add(element);
            }
        }
    }

    /**
     * Copies all elements from the given {@link Iterator} into the given {@link Collection}.This traverses the {@link Iterator}
     * only as far as necessary.
     * 
     * @param collection
     * @param iterator
     * @param maxNumberOfElements
     */
    public static <E> void copyIntoCollectionFrom(Collection<E> collection, Iterator<E> iterator,
            int maxNumberOfElements) {
        if (collection != null && iterator != null) {
            for (int ii = 0; ii < maxNumberOfElements && iterator.hasNext(); ii++) {
                final E element = iterator.next();
                collection.add(element);
            }
        }
    }
}

Related

1. copy(final Collection in)
2. copy(final Collection collection)
3. copy(final Collection collection)
4. copy2Collection(Object[] strs)
5. copyColl(Collection out, Iterable set)
6. copyNSorted(final Collection source, final Collection dest, final Comparator order, final int n)
7. copyRemainder(final T[] sourceArray, final int startIndex, final Collection collector)
8. copyStringCollection(Collection strings)
9. copyWithoutNull(Collection orig)