fsinputstream.java

来自「Hadoop是一个用于运行应用程序在大型集群的廉价硬件设备上的框架。Hadoop」· Java 代码 · 共 39 行

/**
 * Copyright 2005 The Apache Software Foundation
 *
 * Licensed 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.hadoop.fs;

import java.io.*;

/****************************************************************
 * FSInputStream is a generic old InputStream with a little bit
 * of RAF-style seek ability.
 *
 * @author Mike Cafarella
 *****************************************************************/
public abstract class FSInputStream extends InputStream implements Seekable {
    /**
     * Seek to the given offset from the start of the file.
     * The next read() will be from that location.  Can't
     * seek past the end of the file.
     */
    public abstract void seek(long pos) throws IOException;

    /**
     * Return the current offset from the start of the file
     */
    public abstract long getPos() throws IOException;
}