depends.org.apache.http.impl.nio.codecs

类 LengthDelimitedDecoder

java.lang.Object

depends.org.apache.http.impl.nio.codecs.AbstractContentDecoder

depends.org.apache.http.impl.nio.codecs.LengthDelimitedDecoder

所有已实现的接口:

ContentDecoder, FileContentDecoder

@NotThreadSafe
public class LengthDelimitedDecoder
extends AbstractContentDecoder
implements FileContentDecoder

Content decoder that cuts off after a defined number of bytes. This class is used to receive content of HTTP messages where the end of the content entity is determined by the value of the Content-Length header. Entities transferred using this stream can be maximum Long.MAX_VALUE long.

This decoder is optimized to transfer data directly from the underlying I/O session's channel to a FileChannel, whenever possible avoiding intermediate buffering in the session buffer.

从以下版本开始:

4.0

字段概要

从类继承的字段 depends.org.apache.http.impl.nio.codecs.AbstractContentDecoder

buffer, channel, completed, metrics

构造器概要

构造器

构造器和说明
LengthDelimitedDecoder(java.nio.channels.ReadableByteChannel channel, SessionInputBuffer buffer, HttpTransportMetricsImpl metrics, long contentLength)

方法概要

方法

限定符和类型	方法和说明
int	read(java.nio.ByteBuffer dst) Reads a portion of content from the underlying channel
java.lang.String	toString()
long	transfer(java.nio.channels.FileChannel dst, long position, long count) Transfers a portion of entity content from the underlying network channel into the given file channel.

从类继承的方法 depends.org.apache.http.impl.nio.codecs.AbstractContentDecoder

fillBufferFromChannel, isCompleted, readFromChannel, readFromChannel

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

从接口继承的方法 depends.org.apache.http.nio.ContentDecoder

isCompleted

构造器详细资料

LengthDelimitedDecoder

public LengthDelimitedDecoder(java.nio.channels.ReadableByteChannel channel,
                      SessionInputBuffer buffer,
                      HttpTransportMetricsImpl metrics,
                      long contentLength)

方法详细资料

read

public int read(java.nio.ByteBuffer dst)
         throws java.io.IOException

从接口复制的说明: ContentDecoder

Reads a portion of content from the underlying channel

指定者:

read 在接口中 ContentDecoder

参数:

dst - The buffer into which entity content is to be transferred

返回:

The number of bytes read, possibly zero, or -1 if the channel has reached end-of-stream

抛出:

java.io.IOException - if I/O error occurs while reading content

transfer

public long transfer(java.nio.channels.FileChannel dst,
            long position,
            long count)
              throws java.io.IOException

从接口复制的说明: FileContentDecoder

Transfers a portion of entity content from the underlying network channel into the given file channel.
Warning: Many implementations cannot write beyond the length of the file. If the position exceeds the channel's size, some implementations may throw an IOException.

指定者:

transfer 在接口中 FileContentDecoder

参数:

dst - the target FileChannel to transfer data into.

position - The position within the file at which the transfer is to begin; must be non-negative. Must be less than or equal to the size of the file

count - The maximum number of bytes to be transferred; must be non-negative

返回:

The number of bytes, possibly zero, that were actually transferred

抛出:

java.io.IOException

toString

public java.lang.String toString()

覆盖:

toString 在类中 java.lang.Object