| /* |
| * 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.drill.exec.physical.rowSet; |
| |
| import org.apache.drill.exec.physical.resultSet.model.ReaderIndex; |
| import org.apache.drill.exec.record.selection.SelectionVector2; |
| |
| /** |
| * Reader index that points to each row indirectly through the |
| * selection vector. The {@link #offset()} method points to the |
| * actual data row, while the {@link #logicalIndex()} method gives |
| * the position relative to the indirection vector. That is, |
| * the position increases monotonically, but the index jumps |
| * around as specified by the indirection vector. |
| */ |
| |
| public class IndirectRowIndex extends ReaderIndex { |
| |
| private final SelectionVector2 sv2; |
| |
| public IndirectRowIndex(SelectionVector2 sv2) { |
| super(sv2::getCount); |
| this.sv2 = sv2; |
| } |
| |
| @Override |
| public int offset() { return sv2.getIndex(position); } |
| |
| @Override |
| public int hyperVectorIndex() { return 0; } |
| } |