com.aliyun.odps.storage.internal.io

Class LimitedInputStream

java.lang.Object

java.io.InputStream

com.aliyun.odps.storage.internal.io.LimitedInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public final class LimitedInputStream
extends InputStream

一个 InputStream 包装器，它只允许从底层流中读取固定数量的字节。 它的 close() 方法不会关闭底层流。

Constructor Summary

Constructors

Constructor and Description
LimitedInputStream(InputStream underlyingStream, long limit)

Method Summary

Modifier and Type	Method and Description
int	available() 返回可从此输入流读取（或跳过）而不会阻塞的字节数的估计值。 该值是底层流的可用字节数和此流剩余限制之间的较小者。
void	close()
boolean	isClosed()
int	read()
int	read(byte[] b, int off, int len)

Methods inherited from class java.io.InputStream

mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LimitedInputStream

public LimitedInputStream(InputStream underlyingStream,
                          long limit)

Method Detail

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

public int read(byte[] b,
                int off,
                int len)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

available

public int available()
              throws IOException

返回可从此输入流读取（或跳过）而不会阻塞的字节数的估计值。 该值是底层流的可用字节数和此流剩余限制之间的较小者。

Overrides:

available in class InputStream

Returns:

可以在不阻塞的情况下从此输入流读取的字节数的估计值，作为 int 返回。

Throws:

IOException - 如果发生 I/O 错误。

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class InputStream

Throws:

IOException

isClosed

public boolean isClosed()