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The Netty project is an effort to provide an asynchronous event-driven network application framework and tools for rapid development of maintainable high performance and high scalability protocol servers and clients. In other words, Netty is a NIO client server framework which enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server.

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/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project 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.jboss.netty.handler.codec.http.multipart;

import java.util.List;

import org.jboss.netty.handler.codec.http.HttpChunk;
import org.jboss.netty.handler.codec.http.multipart.HttpPostRequestDecoder.EndOfDataDecoderException;
import org.jboss.netty.handler.codec.http.multipart.HttpPostRequestDecoder.ErrorDataDecoderException;
import org.jboss.netty.handler.codec.http.multipart.HttpPostRequestDecoder.NotEnoughDataDecoderException;

public interface InterfaceHttpPostRequestDecoder {
    /**
     * True if this request is a Multipart request
     * @return True if this request is a Multipart request
     */
    boolean isMultipart();

    /**
     * This method returns a List of all HttpDatas from body.

     *
     * If chunked, all chunks must have been offered using offer() method.
     * If not, NotEnoughDataDecoderException will be raised.
     *
     * @return the list of HttpDatas from Body part for POST method
     * @throws NotEnoughDataDecoderException Need more chunks
     */
    List getBodyHttpDatas()
            throws NotEnoughDataDecoderException;

    /**
     * This method returns a List of all HttpDatas with the given name from body.

     *
     * If chunked, all chunks must have been offered using offer() method.
     * If not, NotEnoughDataDecoderException will be raised.

     * @return All Body HttpDatas with the given name (ignore case)
     * @throws NotEnoughDataDecoderException need more chunks
     */
    List getBodyHttpDatas(String name)
            throws NotEnoughDataDecoderException;

    /**
     * This method returns the first InterfaceHttpData with the given name from body.

     *
     * If chunked, all chunks must have been offered using offer() method.
     * If not, NotEnoughDataDecoderException will be raised.
    *
    * @return The first Body InterfaceHttpData with the given name (ignore case)
    * @throws NotEnoughDataDecoderException need more chunks
    */
    InterfaceHttpData getBodyHttpData(String name)
            throws NotEnoughDataDecoderException;

    /**
     * Initialized the internals from a new chunk
     * @param chunk the new received chunk
     * @throws ErrorDataDecoderException if there is a problem with the charset decoding or
     *          other errors
     */
    void offer(HttpChunk chunk) throws ErrorDataDecoderException;

    /**
     * True if at current status, there is an available decoded InterfaceHttpData from the Body.
     *
     * This method works for chunked and not chunked request.
     *
     * @return True if at current status, there is a decoded InterfaceHttpData
     * @throws EndOfDataDecoderException No more data will be available
     */
    boolean hasNext() throws EndOfDataDecoderException;

    /**
     * Returns the next available InterfaceHttpData or null if, at the time it is called, there is no more
     * available InterfaceHttpData. A subsequent call to offer(httpChunk) could enable more data.
     *
     * @return the next available InterfaceHttpData or null if none
     * @throws EndOfDataDecoderException No more data will be available
     */
    InterfaceHttpData next() throws EndOfDataDecoderException;

    /**
     * Clean all HttpDatas (on Disk) for the current request.
     */
    void cleanFiles();

    /**
     * Remove the given FileUpload from the list of FileUploads to clean
     */
    void removeHttpDataFromClean(InterfaceHttpData data);

}