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// 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.
using System;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Thrift.Protocol.Entities;
using Thrift.Transport;
namespace Thrift.Protocol
{
// ReSharper disable once InconsistentNaming
public abstract class TProtocol : IDisposable
{
private bool _isDisposed;
protected int RecursionDepth;
protected TTransport Trans;
protected static readonly TStruct AnonymousStruct = new TStruct(string.Empty);
protected static readonly TField StopField = new TField() { Type = TType.Stop };
protected TProtocol(TTransport trans)
{
Trans = trans;
RecursionLimit = trans.Configuration.RecursionLimit;
RecursionDepth = 0;
}
public TTransport Transport => Trans;
protected int RecursionLimit { get; set; }
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
public void IncrementRecursionDepth()
{
if (RecursionDepth < RecursionLimit)
{
++RecursionDepth;
}
else
{
throw new TProtocolException(TProtocolException.DEPTH_LIMIT, "Depth limit exceeded");
}
}
public void DecrementRecursionDepth()
{
--RecursionDepth;
}
protected virtual void Dispose(bool disposing)
{
if (!_isDisposed)
{
if (disposing)
{
(Trans as IDisposable)?.Dispose();
}
}
_isDisposed = true;
}
protected void CheckReadBytesAvailable(TSet set)
{
Transport.CheckReadBytesAvailable(set.Count * GetMinSerializedSize(set.ElementType));
}
protected void CheckReadBytesAvailable(TList list)
{
Transport.CheckReadBytesAvailable(list.Count * GetMinSerializedSize(list.ElementType));
}
protected void CheckReadBytesAvailable(TMap map)
{
var elmSize = GetMinSerializedSize(map.KeyType) + GetMinSerializedSize(map.ValueType);
Transport.CheckReadBytesAvailable(map.Count * elmSize);
}
// Returns the minimum amount of bytes needed to store the smallest possible instance of TType.
public abstract int GetMinSerializedSize(TType type);
public abstract Task WriteMessageBeginAsync(TMessage message, CancellationToken cancellationToken = default);
public abstract Task WriteMessageEndAsync(CancellationToken cancellationToken = default);
public abstract Task WriteStructBeginAsync(TStruct @struct, CancellationToken cancellationToken = default);
public abstract Task WriteStructEndAsync(CancellationToken cancellationToken = default);
public abstract Task WriteFieldBeginAsync(TField field, CancellationToken cancellationToken = default);
public abstract Task WriteFieldEndAsync(CancellationToken cancellationToken = default);
public abstract Task WriteFieldStopAsync(CancellationToken cancellationToken = default);
public abstract Task WriteMapBeginAsync(TMap map, CancellationToken cancellationToken = default);
public abstract Task WriteMapEndAsync(CancellationToken cancellationToken = default);
public abstract Task WriteListBeginAsync(TList list, CancellationToken cancellationToken = default);
public abstract Task WriteListEndAsync(CancellationToken cancellationToken = default);
public abstract Task WriteSetBeginAsync(TSet set, CancellationToken cancellationToken = default);
public abstract Task WriteSetEndAsync(CancellationToken cancellationToken = default);
public abstract Task WriteBoolAsync(bool b, CancellationToken cancellationToken = default);
public abstract Task WriteByteAsync(sbyte b, CancellationToken cancellationToken = default);
public abstract Task WriteI16Async(short i16, CancellationToken cancellationToken = default);
public abstract Task WriteI32Async(int i32, CancellationToken cancellationToken = default);
public abstract Task WriteI64Async(long i64, CancellationToken cancellationToken = default);
public abstract Task WriteDoubleAsync(double d, CancellationToken cancellationToken = default);
public virtual async Task WriteStringAsync(string s, CancellationToken cancellationToken = default)
{
var bytes = Encoding.UTF8.GetBytes(s);
await WriteBinaryAsync(bytes, cancellationToken);
}
public abstract Task WriteBinaryAsync(byte[] bytes, CancellationToken cancellationToken = default);
public abstract Task WriteUuidAsync(Guid uuid, CancellationToken cancellationToken = default);
public abstract ValueTask<TMessage> ReadMessageBeginAsync(CancellationToken cancellationToken = default);
public abstract Task ReadMessageEndAsync(CancellationToken cancellationToken = default);
public abstract ValueTask<TStruct> ReadStructBeginAsync(CancellationToken cancellationToken = default);
public abstract Task ReadStructEndAsync(CancellationToken cancellationToken = default);
public abstract ValueTask<TField> ReadFieldBeginAsync(CancellationToken cancellationToken = default);
public abstract Task ReadFieldEndAsync(CancellationToken cancellationToken = default);
public abstract ValueTask<TMap> ReadMapBeginAsync(CancellationToken cancellationToken = default);
public abstract Task ReadMapEndAsync(CancellationToken cancellationToken = default);
public abstract ValueTask<TList> ReadListBeginAsync(CancellationToken cancellationToken = default);
public abstract Task ReadListEndAsync(CancellationToken cancellationToken = default);
public abstract ValueTask<TSet> ReadSetBeginAsync(CancellationToken cancellationToken = default);
public abstract Task ReadSetEndAsync(CancellationToken cancellationToken = default);
public abstract ValueTask<bool> ReadBoolAsync(CancellationToken cancellationToken = default);
public abstract ValueTask<sbyte> ReadByteAsync(CancellationToken cancellationToken = default);
public abstract ValueTask<short> ReadI16Async(CancellationToken cancellationToken = default);
public abstract ValueTask<int> ReadI32Async(CancellationToken cancellationToken = default);
public abstract ValueTask<long> ReadI64Async(CancellationToken cancellationToken = default);
public abstract ValueTask<double> ReadDoubleAsync(CancellationToken cancellationToken = default);
public virtual async ValueTask<string> ReadStringAsync(CancellationToken cancellationToken = default)
{
var buf = await ReadBinaryAsync(cancellationToken);
return Encoding.UTF8.GetString(buf, 0, buf.Length);
}
public abstract ValueTask<byte[]> ReadBinaryAsync(CancellationToken cancellationToken = default);
public abstract ValueTask<Guid> ReadUuidAsync(CancellationToken cancellationToken = default);
}
}
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