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.configuration2.io;
018
019import java.io.IOException;
020import java.io.InputStream;
021
022import org.apache.commons.configuration2.ex.ConfigurationException;
023
024/**
025 * <p>
026 * Definition of an interface to be implemented by objects which support reading
027 * from an input stream.
028 * </p>
029 * <p>
030 * When reading data using a {@link FileHandler} per default a reader is used as
031 * defined by the {@link FileBased#read(java.io.Reader)} method. For some
032 * configuration formats it is necessary to directly read binary data. In order
033 * to achieve this, a {@link FileBased} object can also implement this
034 * interface. It defines an additional {@code read()} method expecting an
035 * {@code InputStream} as argument. If the {@code FileHandler} detects that its
036 * associated {@code FileBased} object implements this interface, it passes the
037 * input stream directly rather than transforming it to a reader.
038 * </p>
039 *
040 * @since 2.0
041 */
042public interface InputStreamSupport
043{
044    /**
045     * Reads the content of this object from the specified {@code InputStream}.
046     *
047     * @param in the input stream
048     * @throws ConfigurationException if a non-I/O related problem occurs, e.g.
049     *         the data read does not have the expected format
050     * @throws IOException if an I/O error occurs
051     */
052    void read(InputStream in) throws ConfigurationException, IOException;
053}