c-thiel commented on code in PR #331: URL: https://github.com/apache/iceberg-rust/pull/331#discussion_r1688253972
########## crates/iceberg/src/spec/view_version.rs: ########## @@ -0,0 +1,477 @@ +// 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. + +/*! + * View Versions! +*/ +use crate::error::Result; +use chrono::{DateTime, MappedLocalTime, TimeZone, Utc}; +use serde::{Deserialize, Serialize}; +use std::collections::HashMap; +use std::sync::Arc; +use typed_builder::TypedBuilder; + +use super::view_metadata::ViewVersionLog; +use crate::catalog::NamespaceIdent; +use crate::spec::{SchemaId, SchemaRef, ViewMetadata}; +use crate::{Error, ErrorKind}; +use _serde::ViewVersionV1; + +/// Reference to [`ViewVersion`]. +pub type ViewVersionRef = Arc<ViewVersion>; + +#[derive(Debug, PartialEq, Eq, Clone, Serialize, Deserialize, TypedBuilder)] +#[serde(from = "ViewVersionV1", into = "ViewVersionV1")] +#[builder(field_defaults(setter(prefix = "with_")))] +/// A view versions represents the definition of a view at a specific point in time. +pub struct ViewVersion { + /// A unique long ID + version_id: i64, + /// ID of the schema for the view version + schema_id: SchemaId, + /// Timestamp when the version was created (ms from epoch) + timestamp_ms: i64, + /// A string to string map of summary metadata about the version + summary: HashMap<String, String>, + /// A list of representations for the view definition. + representations: ViewRepresentations, + /// Catalog name to use when a reference in the SELECT does not contain a catalog + #[builder(default = None)] + default_catalog: Option<String>, + /// Namespace to use when a reference in the SELECT is a single identifier + default_namespace: NamespaceIdent, +} + +impl ViewVersion { + /// Get the version id of this view version. + #[inline] + pub fn version_id(&self) -> i64 { + self.version_id + } + + /// Get the schema id of this view version. + #[inline] + pub fn schema_id(&self) -> SchemaId { + self.schema_id + } + + /// Get the timestamp of when the view version was created + #[inline] + pub fn timestamp(&self) -> MappedLocalTime<DateTime<Utc>> { + Utc.timestamp_millis_opt(self.timestamp_ms) + } + + /// Get the timestamp of when the view version was created in milliseconds since epoch + #[inline] + pub fn timestamp_ms(&self) -> i64 { + self.timestamp_ms + } + + /// Get summary of the view version + #[inline] + pub fn summary(&self) -> &HashMap<String, String> { + &self.summary + } + + /// Get this views representations + #[inline] + pub fn representations(&self) -> &ViewRepresentations { + &self.representations + } + + /// Get the default catalog for this view version + #[inline] + pub fn default_catalog(&self) -> Option<&String> { + self.default_catalog.as_ref() + } + + /// Get the default namespace to use when a reference in the SELECT is a single identifier + #[inline] + pub fn default_namespace(&self) -> &NamespaceIdent { + &self.default_namespace + } + + /// Get the schema of this snapshot. + pub fn schema(&self, view_metadata: &ViewMetadata) -> Result<SchemaRef> { + let r = view_metadata + .schema_by_id(self.schema_id()) + .ok_or_else(|| { + Error::new( + ErrorKind::DataInvalid, + format!("Schema with id {} not found", self.schema_id()), + ) + }) + .cloned(); + r + } + + /// Retrieve the history log entry for this view version. + #[allow(dead_code)] + pub(crate) fn log(&self) -> ViewVersionLog { + ViewVersionLog::new(self.version_id, self.timestamp_ms) + } +} + +/// A list of view representations. +#[derive(Debug, PartialEq, Eq, Clone, Serialize, Deserialize)] +pub struct ViewRepresentations(Vec<ViewRepresentation>); + +impl ViewRepresentations { + #[inline] + /// Turn these representations into a builder. + /// Use this method to modify the representations. + pub fn into_builder(self) -> ViewRepresentationsBuilder { + ViewRepresentationsBuilder(self.0) + } + + #[inline] + /// Create a new builder for the representations. + pub fn builder() -> ViewRepresentationsBuilder { + ViewRepresentationsBuilder::new() + } + + #[inline] + /// Get the number of representations + pub fn len(&self) -> usize { + self.0.len() + } + + #[inline] + /// Check if there are no representations + pub fn is_empty(&self) -> bool { + self.0.is_empty() + } +} + +// Iterator for ViewRepresentations +impl IntoIterator for ViewRepresentations { + type Item = ViewRepresentation; + type IntoIter = std::vec::IntoIter<Self::Item>; + + fn into_iter(self) -> Self::IntoIter { + self.0.into_iter() + } +} +impl<'a> IntoIterator for &'a ViewRepresentations { Review Comment: Oh, I screwed up the impl, we cannot implement `Iterator` on an immutable object - no place to store the state. However, I just implemented iter() on the object itself. -- 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: issues-unsubscr...@iceberg.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@iceberg.apache.org For additional commands, e-mail: issues-h...@iceberg.apache.org
