/** | |
* Licensed to the Apache Software Foundation (ASF) under one or more | |
* contributor license agreements. See the NOTICE file distributed with | |
* this work for additional information regarding copyright ownership. | |
* The ASF licenses this file to You 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. | |
*/ | |
namespace Kafka.Client.Serialization | |
{ | |
using System.IO; | |
using System.Net; | |
using System.Text; | |
using System.Net.Sockets; | |
/// <summary> | |
/// Reads data from underlying stream using big endian bytes order for primitive types | |
/// and UTF-8 encoding for strings. | |
/// </summary> | |
public class KafkaBinaryReader : BinaryReader | |
{ | |
/// <summary> | |
/// Initializes a new instance of the <see cref="KafkaBinaryReader"/> class | |
/// using big endian bytes order for primive types and UTF-8 encoding for strings. | |
/// </summary> | |
/// <param name="input"> | |
/// The input stream. | |
/// </param> | |
public KafkaBinaryReader(Stream input) | |
: base(input) | |
{ | |
} | |
/// <summary> | |
/// Resets position pointer. | |
/// </summary> | |
/// <param name="disposing"> | |
/// Not used | |
/// </param> | |
protected override void Dispose(bool disposing) | |
{ | |
if (this.BaseStream.CanSeek) | |
{ | |
this.BaseStream.Position = 0; | |
} | |
} | |
/// <summary> | |
/// Reads two-bytes signed integer from the current stream using big endian bytes order | |
/// and advances the stream position by two bytes | |
/// </summary> | |
/// <returns> | |
/// The two-byte signed integer read from the current stream. | |
/// </returns> | |
public override short ReadInt16() | |
{ | |
short value = base.ReadInt16(); | |
short currentOrdered = IPAddress.NetworkToHostOrder(value); | |
return currentOrdered; | |
} | |
/// <summary> | |
/// Reads four-bytes signed integer from the current stream using big endian bytes order | |
/// and advances the stream position by four bytes | |
/// </summary> | |
/// <returns> | |
/// The four-byte signed integer read from the current stream. | |
/// </returns> | |
public override int ReadInt32() | |
{ | |
int value = base.ReadInt32(); | |
int currentOrdered = IPAddress.NetworkToHostOrder(value); | |
return currentOrdered; | |
} | |
/// <summary> | |
/// Reads eight-bytes signed integer from the current stream using big endian bytes order | |
/// and advances the stream position by eight bytes | |
/// </summary> | |
/// <returns> | |
/// The eight-byte signed integer read from the current stream. | |
/// </returns> | |
public override long ReadInt64() | |
{ | |
long value = base.ReadInt64(); | |
long currentOrdered = IPAddress.NetworkToHostOrder(value); | |
return currentOrdered; | |
} | |
/// <summary> | |
/// Reads four-bytes signed integer from the current stream using big endian bytes order | |
/// and advances the stream position by four bytes | |
/// </summary> | |
/// <returns> | |
/// The four-byte signed integer read from the current stream. | |
/// </returns> | |
public override int Read() | |
{ | |
int value = base.Read(); | |
int currentOrdered = IPAddress.NetworkToHostOrder(value); | |
return currentOrdered; | |
} | |
/// <summary> | |
/// Reads fixed-length topic from underlying stream using given encoding. | |
/// </summary> | |
/// <param name="encoding"> | |
/// The encoding to use. | |
/// </param> | |
/// <returns> | |
/// The read topic. | |
/// </returns> | |
public string ReadTopic(string encoding) | |
{ | |
short length = this.ReadInt16(); | |
if (length == -1) | |
{ | |
return null; | |
} | |
var bytes = this.ReadBytes(length); | |
Encoding encoder = Encoding.GetEncoding(encoding); | |
return encoder.GetString(bytes); | |
} | |
public bool DataAvailabe | |
{ | |
get | |
{ | |
if (this.BaseStream is NetworkStream) | |
{ | |
return ((NetworkStream)this.BaseStream).DataAvailable; | |
} | |
return this.BaseStream.Length != this.BaseStream.Position; | |
} | |
} | |
} | |
} |