| /* |
| * 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.sysds.runtime.compress.colgroup; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.sysds.runtime.compress.colgroup.ColGroup.ColGroupRowIterator; |
| |
| abstract class RowIterator<T> implements Iterator<T> { |
| // iterator configuration |
| protected final int _rl; |
| protected final int _ru; |
| |
| private final List<ColGroup> _colGroups; |
| |
| // iterator state |
| protected ColGroupRowIterator[] _iters = null; |
| protected int _rpos; |
| |
| public RowIterator(int rl, int ru, List<ColGroup> colGroups) { |
| _rl = rl; |
| _ru = ru; |
| _colGroups = colGroups; |
| |
| // initialize array of column group iterators |
| _iters = new ColGroupRowIterator[_colGroups.size()]; |
| for(int i = 0; i < _colGroups.size(); i++) |
| _iters[i] = _colGroups.get(i).getRowIterator(_rl, _ru); |
| |
| // get initial row |
| _rpos = rl; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return(_rpos < _ru); |
| } |
| } |