| /* |
| * 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.fluo.core.impl.scanner; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.Map.Entry; |
| import java.util.function.Function; |
| |
| import com.google.common.collect.Iterators; |
| import org.apache.accumulo.core.client.RowIterator; |
| import org.apache.accumulo.core.data.Key; |
| import org.apache.accumulo.core.data.Value; |
| import org.apache.fluo.api.client.scanner.ColumnScanner; |
| import org.apache.fluo.api.client.scanner.RowScanner; |
| import org.apache.fluo.api.data.Column; |
| import org.apache.fluo.core.util.CachedColumnConverter; |
| import org.apache.fluo.core.util.ColumnUtil; |
| |
| public class RowScannerImpl implements RowScanner { |
| |
| private Iterable<Entry<Key, Value>> snapshot; |
| private Function<Key, Column> columnConverter; |
| |
| RowScannerImpl(Iterable<Entry<Key, Value>> snapshot, Collection<Column> columns) { |
| this.snapshot = snapshot; |
| if (columns.size() == 0) { |
| columnConverter = ColumnUtil::convert; |
| } else { |
| columnConverter = new CachedColumnConverter(columns); |
| } |
| } |
| |
| @Override |
| public Iterator<ColumnScanner> iterator() { |
| RowIterator rowiter = new RowIterator(snapshot.iterator()); |
| return Iterators.transform(rowiter, e -> new ColumnScannerImpl(e, columnConverter)); |
| } |
| } |