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Tag.go
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Tag.go
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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
*
* https://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.
*/
package eip
import (
"context"
"encoding/binary"
apiModel "github.com/apache/plc4x/plc4go/pkg/api/model"
apiValues "github.com/apache/plc4x/plc4go/pkg/api/values"
readWriteModel "github.com/apache/plc4x/plc4go/protocols/eip/readwrite/model"
"github.com/apache/plc4x/plc4go/spi/utils"
)
type PlcTag interface {
apiModel.PlcTag
utils.Serializable
GetTag() string
GetType() readWriteModel.CIPDataTypeCode
GetElementNb() uint16
}
type plcTag struct {
Tag string
Type readWriteModel.CIPDataTypeCode
ElementNb uint16
}
func NewTag(tag string, _type readWriteModel.CIPDataTypeCode, elementNb uint16) PlcTag {
return plcTag{
Tag: tag,
Type: _type,
ElementNb: elementNb,
}
}
func (m plcTag) GetAddressString() string {
return m.GetTag()
}
func (m plcTag) GetValueType() apiValues.PlcValueType {
if plcValueType, ok := apiValues.PlcValueByName(m.GetType().String()); !ok {
return apiValues.NULL
} else {
return plcValueType
}
}
func (m plcTag) GetArrayInfo() []apiModel.ArrayInfo {
return []apiModel.ArrayInfo{}
}
func (m plcTag) GetTag() string {
return m.Tag
}
func (m plcTag) GetType() readWriteModel.CIPDataTypeCode {
return m.Type
}
func (m plcTag) GetElementNb() uint16 {
return m.ElementNb
}
func (m plcTag) Serialize() ([]byte, error) {
wb := utils.NewWriteBufferByteBased(utils.WithByteOrderForByteBasedBuffer(binary.LittleEndian))
if err := m.SerializeWithWriteBuffer(context.Background(), wb); err != nil {
return nil, err
}
return wb.GetBytes(), nil
}
func (m plcTag) SerializeWithWriteBuffer(ctx context.Context, writeBuffer utils.WriteBuffer) error {
if err := writeBuffer.PushContext("EipTag"); err != nil {
return err
}
if err := writeBuffer.WriteString("node", uint32(len([]rune(m.Tag))*8), "UTF-8", m.Tag); err != nil {
return err
}
if m.Type != 0 {
if err := writeBuffer.WriteString("type", uint32(len([]rune(m.Type.String()))*8), "UTF-8", m.Type.String()); err != nil {
return err
}
}
if err := writeBuffer.WriteUint16("elementNb", 16, m.ElementNb); err != nil {
return err
}
if err := writeBuffer.PopContext("EipTag"); err != nil {
return err
}
return nil
}
func (m plcTag) String() string {
writeBuffer := utils.NewWriteBufferBoxBasedWithOptions(true, true)
if err := writeBuffer.WriteSerializable(context.Background(), m); err != nil {
return err.Error()
}
return writeBuffer.GetBox().String()
}