| /* |
| * 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.bti; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| |
| import org.apache.cassandra.io.util.FileDataInput; |
| import org.apache.cassandra.io.util.FileHandle; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| public class ScrubIterator extends PartitionIndex.IndexPosIterator implements ScrubPartitionIterator |
| { |
| public static final int EXHAUSTED = -1; |
| ByteBuffer key; |
| long dataPosition; |
| final FileHandle rowIndexFile; |
| |
| ScrubIterator(PartitionIndex partitionIndex, FileHandle rowIndexFile) throws IOException |
| { |
| super(partitionIndex); |
| this.rowIndexFile = rowIndexFile.sharedCopy(); |
| advance(); |
| } |
| |
| @Override |
| public void close() |
| { |
| super.close(); |
| rowIndexFile.close(); |
| } |
| |
| @Override |
| public ByteBuffer key() |
| { |
| return key; |
| } |
| |
| @Override |
| public long dataPosition() |
| { |
| return dataPosition; |
| } |
| |
| @Override |
| public void advance() throws IOException |
| { |
| long pos = nextIndexPos(); |
| if (pos != PartitionIndex.NOT_FOUND) |
| { |
| if (pos >= 0) // row index position |
| { |
| try (FileDataInput in = rowIndexFile.createReader(pos)) |
| { |
| key = ByteBufferUtil.readWithShortLength(in); |
| dataPosition = TrieIndexEntry.deserialize(in, in.getFilePointer()).position; |
| } |
| } |
| else |
| { |
| key = null; |
| dataPosition = ~pos; |
| } |
| } |
| else |
| { |
| key = null; |
| dataPosition = EXHAUSTED; |
| } |
| } |
| |
| @Override |
| public boolean isExhausted() |
| { |
| return dataPosition == EXHAUSTED; |
| } |
| } |