    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     */
    017    package org.apache.commons.fileupload;
    018
    019
    020    /**
    021     * The {@link ProgressListener} may be used to display a progress bar
    022     * or do stuff like that.
    023     */
    024    public interface ProgressListener {
    025        /** Updates the listeners status information.
    026         * @param pBytesRead The total number of bytes, which have been read
    027         *   so far.
    028         * @param pContentLength The total number of bytes, which are being
    029         *   read. May be -1, if this number is unknown.
    030         * @param pItems The number of the field, which is currently being
    031         *   read. (0 = no item so far, 1 = first item is being read, ...)
    032         */
    033        void update(long pBytesRead, long pContentLength, int pItems);
    034    }