nastra commented on code in PR #8147:
URL: https://github.com/apache/iceberg/pull/8147#discussion_r1284518175
##########
core/src/main/java/org/apache/iceberg/view/ViewMetadata.java:
##########
@@ -121,9 +128,178 @@ default ViewMetadata checkAndNormalize() {
versions().subList(versions().size() - versionHistorySizeToKeep,
versions().size());
List<ViewHistoryEntry> history =
history().subList(history().size() - versionHistorySizeToKeep,
history().size());
- return
ImmutableViewMetadata.builder().from(this).versions(versions).history(history).build();
+ return ViewMetadata.buildFrom(this)
+ .discardChanges()
+ .versions(versions)
+ .history(history)
+ .build();
}
return this;
}
+
+ static Builder builder() {
+ return new Builder();
+ }
+
+ static Builder buildFrom(ViewMetadata base) {
+ return new Builder(base);
+ }
+
+ class Builder {
+ private int formatVersion = 1;
+ private String location;
+ private Integer currentSchemaId;
+ private List<Schema> schemas = Lists.newArrayList();
+ private int currentVersionId = 1;
+ private List<ViewVersion> versions = Lists.newArrayList();
+ private List<ViewHistoryEntry> history = Lists.newArrayList();
+ private Map<String, String> properties = Maps.newHashMap();
+ private List<MetadataUpdate> changes = Lists.newArrayList();
+
+ private Builder() {}
+
+ private Builder(ViewMetadata base) {
+ this.formatVersion = base.formatVersion();
+ this.location = base.location();
+ this.currentSchemaId = base.currentSchemaId();
+ this.schemas = Lists.newArrayList(base.schemas());
+ this.currentVersionId = base.currentVersionId();
+ this.versions = Lists.newArrayList(base.versions());
+ this.history = Lists.newArrayList(base.history());
+ this.properties = Maps.newHashMap(base.properties());
+ this.changes = Lists.newArrayList(base.changes());
+ }
+
+ public Builder formatVersion(int newFormatVersion) {
+ this.formatVersion = newFormatVersion;
+ this.changes.add(new
MetadataUpdate.UpgradeFormatVersion(newFormatVersion));
+ return this;
+ }
+
+ public Builder location(String newLocation) {
+ this.location = newLocation;
+ this.changes.add(new MetadataUpdate.SetLocation(newLocation));
+ return this;
+ }
+
+ public Builder currentVersionId(int versionId) {
+ this.currentVersionId = versionId;
+ this.changes.add(new MetadataUpdate.SetCurrentViewVersion(versionId));
+ return this;
+ }
+
+ public Builder currentSchemaId(Integer schemaId) {
+ this.currentSchemaId = schemaId;
+ this.changes.add(new MetadataUpdate.SetCurrentSchema(schemaId));
+ return this;
+ }
+
+ public Builder addSchema(Schema schema) {
+ this.schemas.add(schema);
+ this.changes.add(new MetadataUpdate.AddSchema(schema,
schema.highestFieldId()));
+ return this;
+ }
+
+ public Builder addAllSchemas(Iterable<Schema> schemaEntries) {
+ for (Schema schema : schemaEntries) {
+ this.schemas.add(schema);
+ this.changes.add(new MetadataUpdate.AddSchema(schema,
schema.highestFieldId()));
Review Comment:
I looked into making this optional by moving `AddSchema.lastColumnId` from
an `int` to an `Integer` and not passing/sending it for views, but that is an
API-breaking change unfortunately. I think we're probably ok sending `new
MetadataUpdate.AddSchema(schema, schema.highestFieldId())` for Views, since
that's what
https://github.com/apache/iceberg/blob/master/core/src/main/java/org/apache/iceberg/MetadataUpdateParser.java#L404
would be doing anyway
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