/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements.  See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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 org.apache.commons.fileupload;/** * The {@link ProgressListener} may be used to display a progress bar * or do stuff like that. */public interface ProgressListener {    /** Updates the listeners status information.     * @param pBytesRead The total number of bytes, which have been read     *   so far.     * @param pContentLength The total number of bytes, which are being     *   read. May be -1, if this number is unknown.     * @param pItems The number of the field, which is currently being     *   read. (0 = no item so far, 1 = first item is being read, ...)     */    void update(long pBytesRead, long pContentLength, int pItems);}