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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.
*)
unit Thrift;
interface
uses
SysUtils,
Thrift.Exception,
Thrift.Protocol;
const
Version = '1.0.0-dev';
type
TException = Thrift.Exception.TException; // compatibility alias
TApplicationExceptionSpecializedClass = class of TApplicationExceptionSpecialized;
TApplicationException = class( TException)
public
type
{$SCOPEDENUMS ON}
TExceptionType = (
Unknown,
UnknownMethod,
InvalidMessageType,
WrongMethodName,
BadSequenceID,
MissingResult,
InternalError,
ProtocolError,
InvalidTransform,
InvalidProtocol,
UnsupportedClientType
);
{$SCOPEDENUMS OFF}
private
function GetType: TExceptionType;
protected
constructor HiddenCreate(const Msg: string);
public
// purposefully hide inherited constructor
class function Create(const Msg: string): TApplicationException; overload; deprecated 'Use specialized TApplicationException types (or regenerate from IDL)';
class function Create: TApplicationException; overload; deprecated 'Use specialized TApplicationException types (or regenerate from IDL)';
class function Create( AType: TExceptionType): TApplicationException; overload; deprecated 'Use specialized TApplicationException types (or regenerate from IDL)';
class function Create( AType: TExceptionType; const msg: string): TApplicationException; overload; deprecated 'Use specialized TApplicationException types (or regenerate from IDL)';
class function GetSpecializedExceptionType(AType: TExceptionType): TApplicationExceptionSpecializedClass;
class function Read( const iprot: IProtocol): TApplicationException;
procedure Write( const oprot: IProtocol );
end;
// Needed to remove deprecation warning
TApplicationExceptionSpecialized = class abstract (TApplicationException)
public
constructor Create(const Msg: string);
end;
TApplicationExceptionUnknown = class (TApplicationExceptionSpecialized);
TApplicationExceptionUnknownMethod = class (TApplicationExceptionSpecialized);
TApplicationExceptionInvalidMessageType = class (TApplicationExceptionSpecialized);
TApplicationExceptionWrongMethodName = class (TApplicationExceptionSpecialized);
TApplicationExceptionBadSequenceID = class (TApplicationExceptionSpecialized);
TApplicationExceptionMissingResult = class (TApplicationExceptionSpecialized);
TApplicationExceptionInternalError = class (TApplicationExceptionSpecialized);
TApplicationExceptionProtocolError = class (TApplicationExceptionSpecialized);
TApplicationExceptionInvalidTransform = class (TApplicationExceptionSpecialized);
TApplicationExceptionInvalidProtocol = class (TApplicationExceptionSpecialized);
TApplicationExceptionUnsupportedClientType = class (TApplicationExceptionSpecialized);
implementation
{ TApplicationException }
function TApplicationException.GetType: TExceptionType;
begin
if Self is TApplicationExceptionUnknownMethod then Result := TExceptionType.UnknownMethod
else if Self is TApplicationExceptionInvalidMessageType then Result := TExceptionType.InvalidMessageType
else if Self is TApplicationExceptionWrongMethodName then Result := TExceptionType.WrongMethodName
else if Self is TApplicationExceptionBadSequenceID then Result := TExceptionType.BadSequenceID
else if Self is TApplicationExceptionMissingResult then Result := TExceptionType.MissingResult
else if Self is TApplicationExceptionInternalError then Result := TExceptionType.InternalError
else if Self is TApplicationExceptionProtocolError then Result := TExceptionType.ProtocolError
else if Self is TApplicationExceptionInvalidTransform then Result := TExceptionType.InvalidTransform
else if Self is TApplicationExceptionInvalidProtocol then Result := TExceptionType.InvalidProtocol
else if Self is TApplicationExceptionUnsupportedClientType then Result := TExceptionType.UnsupportedClientType
else Result := TExceptionType.Unknown;
end;
constructor TApplicationException.HiddenCreate(const Msg: string);
begin
inherited Create(Msg);
end;
class function TApplicationException.Create(const Msg: string): TApplicationException;
begin
Result := TApplicationExceptionUnknown.Create(Msg);
end;
class function TApplicationException.Create: TApplicationException;
begin
Result := TApplicationExceptionUnknown.Create('');
end;
class function TApplicationException.Create( AType: TExceptionType): TApplicationException;
begin
{$WARN SYMBOL_DEPRECATED OFF}
Result := Create(AType, '');
{$WARN SYMBOL_DEPRECATED DEFAULT}
end;
class function TApplicationException.Create( AType: TExceptionType; const msg: string): TApplicationException;
begin
Result := GetSpecializedExceptionType(AType).Create(msg);
end;
class function TApplicationException.GetSpecializedExceptionType(AType: TExceptionType): TApplicationExceptionSpecializedClass;
begin
case AType of
TExceptionType.UnknownMethod: Result := TApplicationExceptionUnknownMethod;
TExceptionType.InvalidMessageType: Result := TApplicationExceptionInvalidMessageType;
TExceptionType.WrongMethodName: Result := TApplicationExceptionWrongMethodName;
TExceptionType.BadSequenceID: Result := TApplicationExceptionBadSequenceID;
TExceptionType.MissingResult: Result := TApplicationExceptionMissingResult;
TExceptionType.InternalError: Result := TApplicationExceptionInternalError;
TExceptionType.ProtocolError: Result := TApplicationExceptionProtocolError;
TExceptionType.InvalidTransform: Result := TApplicationExceptionInvalidTransform;
TExceptionType.InvalidProtocol: Result := TApplicationExceptionInvalidProtocol;
TExceptionType.UnsupportedClientType: Result := TApplicationExceptionUnsupportedClientType;
else
Result := TApplicationExceptionUnknown;
end;
end;
class function TApplicationException.Read( const iprot: IProtocol): TApplicationException;
var
field : TThriftField;
msg : string;
typ : TExceptionType;
struc : TThriftStruct;
begin
msg := '';
typ := TExceptionType.Unknown;
struc := iprot.ReadStructBegin;
while ( True ) do
begin
field := iprot.ReadFieldBegin;
if ( field.Type_ = TType.Stop) then
begin
Break;
end;
case field.Id of
1 : begin
if ( field.Type_ = TType.String_) then
begin
msg := iprot.ReadString;
end else
begin
TProtocolUtil.Skip( iprot, field.Type_ );
end;
end;
2 : begin
if ( field.Type_ = TType.I32) then
begin
typ := TExceptionType( iprot.ReadI32 );
end else
begin
TProtocolUtil.Skip( iprot, field.Type_ );
end;
end else
begin
TProtocolUtil.Skip( iprot, field.Type_);
end;
end;
iprot.ReadFieldEnd;
end;
iprot.ReadStructEnd;
Result := GetSpecializedExceptionType(typ).Create(msg);
end;
procedure TApplicationException.Write( const oprot: IProtocol);
var
struc : TThriftStruct;
field : TThriftField;
begin
Init(struc, 'TApplicationException');
Init(field);
oprot.WriteStructBegin( struc );
if Message <> '' then
begin
field.Name := 'message';
field.Type_ := TType.String_;
field.Id := 1;
oprot.WriteFieldBegin( field );
oprot.WriteString( Message );
oprot.WriteFieldEnd;
end;
field.Name := 'type';
field.Type_ := TType.I32;
field.Id := 2;
oprot.WriteFieldBegin(field);
oprot.WriteI32(Integer(GetType));
oprot.WriteFieldEnd();
oprot.WriteFieldStop();
oprot.WriteStructEnd();
end;
{ TApplicationExceptionSpecialized }
constructor TApplicationExceptionSpecialized.Create(const Msg: string);
begin
inherited HiddenCreate(Msg);
end;
end.
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