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lazy_converters.go
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/
lazy_converters.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
*
* 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.
*/
package typemanager
import (
"github.com/go-errors/errors"
"github.com/noctarius/timescaledb-event-streamer/spi/pgtypes"
"github.com/noctarius/timescaledb-event-streamer/spi/schema"
"reflect"
)
type lazyArrayConverter struct {
typeManager *typeManager
oidElement uint32
converter pgtypes.TypeConverter
}
func (lac *lazyArrayConverter) convert(
oid uint32, value any,
) (any, error) {
if lac.converter == nil {
elementType, err := lac.typeManager.ResolveDataType(lac.oidElement)
if err != nil {
return nil, err
}
elementConverter, err := lac.typeManager.ResolveTypeConverter(lac.oidElement)
if err != nil {
return nil, err
}
reflectiveType, err := schemaType2ReflectiveType(elementType.SchemaType())
if err != nil {
return nil, err
}
targetType := reflect.SliceOf(reflectiveType)
lac.converter = reflectiveArrayConverter(lac.oidElement, targetType, elementConverter)
}
return lac.converter(oid, value)
}
func schemaType2ReflectiveType(
schemaType schema.Type,
) (reflect.Type, error) {
switch schemaType {
case schema.INT8:
return int8Type, nil
case schema.INT16:
return int16Type, nil
case schema.INT32:
return int32Type, nil
case schema.INT64:
return int64Type, nil
case schema.FLOAT32:
return float32Type, nil
case schema.FLOAT64:
return float64Type, nil
case schema.BOOLEAN:
return booleanType, nil
case schema.STRING:
return stringType, nil
case schema.BYTES:
return byteaType, nil
case schema.MAP, schema.STRUCT:
return mapType, nil
default:
return nil, errors.Errorf("Unsupported schema type %s", string(schemaType))
}
}