001/*
002 * ====================================================================
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *   http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing,
014 * software distributed under the License is distributed on an
015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
016 * KIND, either express or implied.  See the License for the
017 * specific language governing permissions and limitations
018 * under the License.
019 * ====================================================================
020 *
021 * This software consists of voluntary contributions made by many
022 * individuals on behalf of the Apache Software Foundation.  For more
023 * information on the Apache Software Foundation, please see
024 * <http://www.apache.org/>.
025 *
026 */
027
028package org.apache.http.io;
029
030import java.io.IOException;
031
032import org.apache.http.HttpException;
033import org.apache.http.HttpMessage;
034
035/**
036 * Abstract message parser intended to build HTTP messages from an arbitrary data source.
037 *
038 * @param <T>
039 *            {@link HttpMessage} or a subclass
040 *
041 * @since 4.0
042 */
043public interface HttpMessageParser<T extends HttpMessage> {
044
045    /**
046     * Generates an instance of {@link HttpMessage} from the underlying data
047     * source.
048     *
049     * @return HTTP message
050     * @throws IOException in case of an I/O error
051     * @throws HttpException in case of HTTP protocol violation
052     */
053    T parse()
054        throws IOException, HttpException;
055
056}