    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017package org.apache.commons.collections4;
    018
    019import java.util.Collection;
    020
    021/**
    022 * Defines a collection that is bounded in size.
    023 * <p>
    024 * The size of the collection can vary, but it can never exceed a preset
    025 * maximum number of elements. This interface allows the querying of details
    026 * associated with the maximum number of elements.
    027 *
    028 * @see CollectionUtils#isFull
    029 * @see CollectionUtils#maxSize
    030 *
    031 * @param <E> the type of elements in this collection
    032 * @since 3.0
    033 */
    034public interface BoundedCollection<E> extends Collection<E> {
    035
    036    /**
    037     * Returns true if this collection is full and no new elements can be added.
    038     *
    039     * @return <code>true</code> if the collection is full
    040     */
    041    boolean isFull();
    042
    043    /**
    044     * Gets the maximum size of the collection (the bound).
    045     *
    046     * @return the maximum number of elements the collection can hold
    047     */
    048    int maxSize();
    049
    050}