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ehistogram_dpb.go
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/
ehistogram_dpb.go
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// Copyright The OpenTelemetry Authors
//
// Licensed 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 otlp
import (
"github.com/apache/arrow/go/v16/arrow"
"github.com/apache/arrow/go/v16/arrow/array"
"go.opentelemetry.io/collector/pdata/pmetric"
arrowutils "github.com/open-telemetry/otel-arrow/pkg/arrow"
"github.com/open-telemetry/otel-arrow/pkg/otel/constants"
"github.com/open-telemetry/otel-arrow/pkg/werror"
)
type EHistogramDataPointBucketsIds struct {
ID int
Offset int
BucketCounts int
}
func NewEHistogramDataPointBucketsIds(schema *arrow.Schema, parent string) (*EHistogramDataPointBucketsIds, error) {
ID, parentDT, err := arrowutils.StructFieldIDFromSchema(schema, parent)
if err != nil {
return nil, werror.Wrap(err)
}
offset, _ := arrowutils.FieldIDFromStruct(parentDT, constants.ExpHistogramOffset)
bucketCounts, _ := arrowutils.FieldIDFromStruct(parentDT, constants.ExpHistogramBucketCounts)
if offset == arrowutils.AbsentFieldID && bucketCounts == arrowutils.AbsentFieldID {
ID = arrowutils.AbsentFieldID
}
return &EHistogramDataPointBucketsIds{
ID: ID,
Offset: offset,
BucketCounts: bucketCounts,
}, nil
}
func AppendUnivariateEHistogramDataPointBucketsInto(dpBuckets pmetric.ExponentialHistogramDataPointBuckets, ehdp *array.Struct, ids *EHistogramDataPointBucketsIds, row int) error {
if ehdp == nil {
return nil
}
offsetArr := ehdp.Field(ids.Offset)
if offsetArr != nil {
if i32OffsetArr, ok := offsetArr.(*array.Int32); ok {
dpBuckets.SetOffset(i32OffsetArr.Value(row))
} else {
return werror.Wrap(ErrNotArrayInt32)
}
}
bucketCountsArr := ehdp.Field(ids.BucketCounts)
if bucketCountsArr != nil {
if i64BucketCountsArr, ok := bucketCountsArr.(*array.List); ok {
start := int(i64BucketCountsArr.Offsets()[row])
end := int(i64BucketCountsArr.Offsets()[row+1])
values := i64BucketCountsArr.ListValues()
if v, ok := values.(*array.Uint64); ok {
dpbs := dpBuckets.BucketCounts()
dpbs.EnsureCapacity(end - start)
for i := start; i < end; i++ {
dpbs.Append(v.Value(i))
}
}
} else {
return werror.Wrap(ErrNotArrayList)
}
}
return nil
}