zeroshade commented on a change in pull request #10951: URL: https://github.com/apache/arrow/pull/10951#discussion_r700446666
########## File path: go/parquet/metadata/row_group.go ########## @@ -0,0 +1,168 @@ +// 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 metadata + +import ( + "reflect" + + "github.com/apache/arrow/go/parquet" + "github.com/apache/arrow/go/parquet/internal/encryption" + format "github.com/apache/arrow/go/parquet/internal/gen-go/parquet" + "github.com/apache/arrow/go/parquet/schema" + "golang.org/x/xerrors" +) + +// RowGroupMetaData is a proxy around the thrift RowGroup meta data object +type RowGroupMetaData struct { + rowGroup *format.RowGroup + Schema *schema.Schema + version *AppVersion + fileDecryptor encryption.FileDecryptor +} + +// NewRowGroupMetaData constructs an object from the underlying thrift objects and schema, +// decrypting if provided and necessary. This is primarily used internally and consumers +// should use the RowGroupMetaDataBuilder rather than this directly. +func NewRowGroupMetaData(rg *format.RowGroup, sc *schema.Schema, version *AppVersion, decryptor encryption.FileDecryptor) *RowGroupMetaData { + return &RowGroupMetaData{ + rowGroup: rg, + Schema: sc, + version: version, + fileDecryptor: decryptor, + } +} + +// NumColumns returns the number of column metadata objects in this row group +func (r *RowGroupMetaData) NumColumns() int { + return len(r.rowGroup.GetColumns()) +} + +func (r *RowGroupMetaData) Equals(other *RowGroupMetaData) bool { + return reflect.DeepEqual(r.rowGroup, other.rowGroup) +} + +// NumRows is just the number of rows in this row group Review comment: done -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
