github.com/datastax/go-cassandra-native-protocol@v0.0.0-20220706104457-5e8aad05cf90/message/options.go (about)

     1  // Copyright 2020 DataStax
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package message
    16  
    17  import (
    18  	"errors"
    19  	"fmt"
    20  	"io"
    21  
    22  	"github.com/datastax/go-cassandra-native-protocol/primitive"
    23  )
    24  
    25  // Options is a request message to obtain supported features from the server. The response to such a request is
    26  // Supported.
    27  // +k8s:deepcopy-gen=true
    28  // +k8s:deepcopy-gen:interfaces=github.com/datastax/go-cassandra-native-protocol/message.Message
    29  type Options struct {
    30  }
    31  
    32  func (m *Options) IsResponse() bool {
    33  	return false
    34  }
    35  
    36  func (m *Options) GetOpCode() primitive.OpCode {
    37  	return primitive.OpCodeOptions
    38  }
    39  
    40  func (m *Options) String() string {
    41  	return "OPTIONS"
    42  }
    43  
    44  type optionsCodec struct{}
    45  
    46  func (c *optionsCodec) Encode(msg Message, _ io.Writer, _ primitive.ProtocolVersion) error {
    47  	_, ok := msg.(*Options)
    48  	if !ok {
    49  		return errors.New(fmt.Sprintf("expected *message.Options, got %T", msg))
    50  	}
    51  	return nil
    52  }
    53  
    54  func (c *optionsCodec) EncodedLength(msg Message, _ primitive.ProtocolVersion) (int, error) {
    55  	_, ok := msg.(*Options)
    56  	if !ok {
    57  		return -1, errors.New(fmt.Sprintf("expected *message.Options, got %T", msg))
    58  	}
    59  	return 0, nil
    60  }
    61  
    62  func (c *optionsCodec) Decode(_ io.Reader, _ primitive.ProtocolVersion) (Message, error) {
    63  	return &Options{}, nil
    64  }
    65  
    66  func (c *optionsCodec) GetOpCode() primitive.OpCode {
    67  	return primitive.OpCodeOptions
    68  }