| /* |
| * 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.format.big; |
| |
| import java.io.IOException; |
| import java.util.Iterator; |
| |
| import com.google.common.collect.AbstractIterator; |
| import org.apache.cassandra.db.columniterator.OnDiskAtomIterator; |
| import org.apache.cassandra.io.sstable.format.SSTableReader; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.cassandra.db.*; |
| import org.apache.cassandra.db.composites.CellNameType; |
| import org.apache.cassandra.db.composites.Composite; |
| import org.apache.cassandra.io.sstable.CorruptSSTableException; |
| import org.apache.cassandra.io.util.FileDataInput; |
| import org.apache.cassandra.tracing.Tracing; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| class SimpleSliceReader extends AbstractIterator<OnDiskAtom> implements OnDiskAtomIterator |
| { |
| private static final Logger logger = LoggerFactory.getLogger(SimpleSliceReader.class); |
| |
| private final FileDataInput file; |
| private final boolean needsClosing; |
| private final Composite finishColumn; |
| private final CellNameType comparator; |
| private final ColumnFamily emptyColumnFamily; |
| private final Iterator<OnDiskAtom> atomIterator; |
| |
| SimpleSliceReader(SSTableReader sstable, RowIndexEntry indexEntry, FileDataInput input, Composite finishColumn) |
| { |
| Tracing.trace("Seeking to partition beginning in data file"); |
| this.finishColumn = finishColumn; |
| this.comparator = sstable.metadata.comparator; |
| try |
| { |
| if (input == null) |
| { |
| this.file = sstable.getFileDataInput(indexEntry.position); |
| this.needsClosing = true; |
| } |
| else |
| { |
| this.file = input; |
| input.seek(indexEntry.position); |
| this.needsClosing = false; |
| } |
| |
| // Skip key and data size |
| ByteBufferUtil.skipShortLength(file); |
| |
| emptyColumnFamily = ArrayBackedSortedColumns.factory.create(sstable.metadata); |
| emptyColumnFamily.delete(DeletionTime.serializer.deserialize(file)); |
| atomIterator = emptyColumnFamily.metadata().getOnDiskIterator(file, sstable.descriptor.version); |
| } |
| catch (IOException e) |
| { |
| sstable.markSuspect(); |
| throw new CorruptSSTableException(e, sstable.getFilename()); |
| } |
| } |
| |
| protected OnDiskAtom computeNext() |
| { |
| if (!atomIterator.hasNext()) |
| return endOfData(); |
| |
| OnDiskAtom column = atomIterator.next(); |
| if (!finishColumn.isEmpty() && comparator.compare(column.name(), finishColumn) > 0) |
| return endOfData(); |
| |
| return column; |
| } |
| |
| public ColumnFamily getColumnFamily() |
| { |
| return emptyColumnFamily; |
| } |
| |
| public void close() throws IOException |
| { |
| if (needsClosing) |
| file.close(); |
| } |
| |
| public DecoratedKey getKey() |
| { |
| throw new UnsupportedOperationException(); |
| } |
| } |