| /* |
| * 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.io.sstable; |
| |
| import java.io.IOException; |
| import java.io.IOError; |
| import java.util.Iterator; |
| |
| import org.apache.cassandra.db.*; |
| import org.apache.cassandra.db.rows.*; |
| import org.apache.cassandra.io.util.DataInputPlus; |
| import org.apache.cassandra.io.util.FileDataInput; |
| import org.apache.cassandra.schema.TableMetadata; |
| import org.apache.cassandra.utils.AbstractIterator; |
| |
| /** |
| * Utility class to handle deserializing atom from sstables. |
| * |
| * Note that this is not a full fledged UnfilteredRowIterator. It's also not closeable, it is always |
| * the job of the user to close the underlying ressources. |
| */ |
| public abstract class SSTableSimpleIterator extends AbstractIterator<Unfiltered> implements Iterator<Unfiltered> |
| { |
| final TableMetadata metadata; |
| protected final DataInputPlus in; |
| protected final DeserializationHelper helper; |
| |
| private SSTableSimpleIterator(TableMetadata metadata, DataInputPlus in, DeserializationHelper helper) |
| { |
| this.metadata = metadata; |
| this.in = in; |
| this.helper = helper; |
| } |
| |
| public static SSTableSimpleIterator create(TableMetadata metadata, DataInputPlus in, SerializationHeader header, DeserializationHelper helper, DeletionTime partitionDeletion) |
| { |
| return new CurrentFormatIterator(metadata, in, header, helper); |
| } |
| |
| public static SSTableSimpleIterator createTombstoneOnly(TableMetadata metadata, DataInputPlus in, SerializationHeader header, DeserializationHelper helper, DeletionTime partitionDeletion) |
| { |
| return new CurrentFormatTombstoneIterator(metadata, in, header, helper); |
| } |
| |
| public abstract Row readStaticRow() throws IOException; |
| |
| private static class CurrentFormatIterator extends SSTableSimpleIterator |
| { |
| private final SerializationHeader header; |
| |
| private final Row.Builder builder; |
| |
| private CurrentFormatIterator(TableMetadata metadata, DataInputPlus in, SerializationHeader header, DeserializationHelper helper) |
| { |
| super(metadata, in, helper); |
| this.header = header; |
| this.builder = BTreeRow.sortedBuilder(); |
| } |
| |
| public Row readStaticRow() throws IOException |
| { |
| return header.hasStatic() ? UnfilteredSerializer.serializer.deserializeStaticRow(in, header, helper) : Rows.EMPTY_STATIC_ROW; |
| } |
| |
| protected Unfiltered computeNext() |
| { |
| try |
| { |
| Unfiltered unfiltered = UnfilteredSerializer.serializer.deserialize(in, header, helper, builder); |
| return unfiltered == null ? endOfData() : unfiltered; |
| } |
| catch (IOException e) |
| { |
| throw new IOError(e); |
| } |
| } |
| } |
| |
| private static class CurrentFormatTombstoneIterator extends SSTableSimpleIterator |
| { |
| private final SerializationHeader header; |
| |
| private CurrentFormatTombstoneIterator(TableMetadata metadata, DataInputPlus in, SerializationHeader header, DeserializationHelper helper) |
| { |
| super(metadata, in, helper); |
| this.header = header; |
| } |
| |
| public Row readStaticRow() throws IOException |
| { |
| if (header.hasStatic()) |
| { |
| Row staticRow = UnfilteredSerializer.serializer.deserializeStaticRow(in, header, helper); |
| if (!staticRow.deletion().isLive()) |
| return BTreeRow.emptyDeletedRow(staticRow.clustering(), staticRow.deletion()); |
| } |
| return Rows.EMPTY_STATIC_ROW; |
| } |
| |
| protected Unfiltered computeNext() |
| { |
| try |
| { |
| Unfiltered unfiltered = UnfilteredSerializer.serializer.deserializeTombstonesOnly((FileDataInput) in, header, helper); |
| return unfiltered == null ? endOfData() : unfiltered; |
| } |
| catch (IOException e) |
| { |
| throw new IOError(e); |
| } |
| } |
| } |
| } |