dcapwell commented on code in PR #4175: URL: https://github.com/apache/cassandra/pull/4175#discussion_r2151069183
########## test/unit/org/apache/cassandra/db/partitions/SimplePartition.java: ########## @@ -0,0 +1,292 @@ +/* + * 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 org.apache.cassandra.db.partitions; + +import java.nio.ByteBuffer; +import java.util.List; + +import org.apache.cassandra.db.Clustering; +import org.apache.cassandra.db.DecoratedKey; +import org.apache.cassandra.db.DeletionInfo; +import org.apache.cassandra.db.DeletionTime; +import org.apache.cassandra.db.LivenessInfo; +import org.apache.cassandra.db.RegularAndStaticColumns; +import org.apache.cassandra.db.marshal.CollectionType; +import org.apache.cassandra.db.marshal.MapType; +import org.apache.cassandra.db.marshal.UserType; +import org.apache.cassandra.db.rows.BTreeRow; +import org.apache.cassandra.db.rows.BufferCell; +import org.apache.cassandra.db.rows.Cell; +import org.apache.cassandra.db.rows.CellPath; +import org.apache.cassandra.db.rows.ColumnData; +import org.apache.cassandra.db.rows.EncodingStats; +import org.apache.cassandra.db.rows.Row; +import org.apache.cassandra.db.rows.RowIterator; +import org.apache.cassandra.db.rows.Rows; +import org.apache.cassandra.db.transform.FilteredRows; +import org.apache.cassandra.schema.ColumnMetadata; +import org.apache.cassandra.schema.TableMetadata; +import org.apache.cassandra.utils.TimeUUID; +import org.apache.cassandra.utils.btree.BTree; +import org.apache.cassandra.utils.btree.UpdateFunction; +import org.apache.cassandra.utils.memory.Cloner; +import org.apache.cassandra.utils.memory.HeapCloner; + +public class SimplePartition extends AbstractBTreePartition +{ + public static final int DEFAULT_TIMESTAMP = 42; + + private final TableMetadata metadata; + private final Updater updater; + private BTreePartitionData current; + + public SimplePartition(TableMetadata metadata, DecoratedKey partitionKey) + { + super(partitionKey); + this.metadata = metadata; + this.current = BTreePartitionData.EMPTY; + this.updater = new Updater(); + } + + @Override + protected BTreePartitionData holder() + { + return current; + } + + @Override + protected boolean canHaveShadowedData() + { + return false; + } + + @Override + public TableMetadata metadata() + { + return metadata; + } + + public SimplePartition clear() + { + this.current = BTreePartitionData.EMPTY; + return this; + } + + public SimplePartition add(Row row) + { + PartitionUpdate update = PartitionUpdate.singleRowUpdate(metadata, partitionKey, row); + current = updater.makeMergedPartition(current, update); + return this; + } + + public RowBuilder add(Clustering<?> ck) + { + return new RowBuilder(ck); + } + + public SimplePartition addEmpty(Clustering<?> ck) + { + return add(ck).build(); + } + + public SimplePartition addEmptyAndLive(Clustering<?> ck) + { + return addEmptyAndLive(ck, DEFAULT_TIMESTAMP, DEFAULT_TIMESTAMP); + } + + public SimplePartition addEmptyAndLive(Clustering<?> ck, long timestamp, long nowInSec) + { + return add(ck).liveness(timestamp, nowInSec).build(); + } + + public RowIterator filtered() + { + return FilteredRows.filter(unfilteredIterator(), DEFAULT_TIMESTAMP); + } + + public class RowBuilder + { + private final Row.Builder builder = BTreeRow.unsortedBuilder(); + private long timestamp = DEFAULT_TIMESTAMP; + + public RowBuilder(Clustering<?> ck) + { + builder.newRow(ck); + } + + public RowBuilder timestamp(long timestamp) + { + this.timestamp = timestamp; + return this; + } + + public RowBuilder liveness(long timestamp, long nowInSec) + { + builder.addPrimaryKeyLivenessInfo(LivenessInfo.create(timestamp, nowInSec)); + return this; + } + + public RowBuilder add(ColumnMetadata column, ByteBuffer value) + { + if (column.type.unwrap().isMultiCell()) + throw new IllegalArgumentException("Unable to add a single value to a multi cell column " + column); + builder.addCell(BufferCell.live(column, timestamp, value)); + return this; + } + + public RowBuilder addComplex(ColumnMetadata column, List<ByteBuffer> values) + { + if (!column.type.unwrap().isMultiCell()) + throw new IllegalArgumentException("Unable to add multiple values to a regular column " + column); + builder.addComplexDeletion(column, DeletionTime.build(timestamp - 1, timestamp - 1)); + // map needs to be specially handled as its key/value + if (column.type.unwrap() instanceof MapType) + { + for (int i = 0; i < values.size(); i = i + 2) + { + ByteBuffer key = values.get(i); + ByteBuffer value = values.get(i + 1); + builder.addCell(BufferCell.live(column, timestamp, value, CellPath.create(key))); + } + } + else + { + for (int i = 0; i < values.size(); i++) + builder.addCell(complexCell(column, i, values.get(i), timestamp)); + } + return this; + } + + private Cell<?> complexCell(ColumnMetadata column, int idx, ByteBuffer value, long timestamp) + { + var type = column.type.unwrap(); + if (type.isCollection()) + { + CollectionType<?> ct = (CollectionType<?>) type; + switch (ct.kind) + { + case SET: + { + // this isn't correct... the value isn't actually known... so only support map with key/value matching... + return BufferCell.live(column, timestamp, value, CellPath.create(value)); + } + case LIST: + { + // this isn't actually correct, as the cellpath is based off time, but a counter is used to keep things deterministic + CellPath path = CellPath.create(ByteBuffer.wrap(TimeUUID.Generator.atUnixMillisAsBytes(idx))); + return BufferCell.live(column, timestamp, value, path); + } + case MAP: + throw new UnsupportedOperationException("Map isn't supported due to API being single element rather than multi-element"); + default: + throw new UnsupportedOperationException(ct.kind.name()); + } + } + else if (type.isUDT()) + { + UserType ut = (UserType) type; + CellPath path = ut.cellPathForField(ut.fieldName(idx)); + return BufferCell.live(column, timestamp, value, path); + } + + throw new UnsupportedOperationException(type.toString()); + } + + public SimplePartition build() + { + SimplePartition.this.add(builder.build()); + return SimplePartition.this; + } + } + + private class Updater implements UpdateFunction<Row, Row>, ColumnData.PostReconciliationFunction Review Comment: I honestly don't recall what was the issue i faced... ill relook at it -- This is an automated message from the Apache Git Service. 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