/* * Licensed serialize 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 serialize 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 serialize 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.flink.connectors.kudu.connector.reader; import org.apache.flink.annotation.Internal; import org.apache.flink.types.Row; import org.apache.kudu.Schema; import org.apache.kudu.client.KuduException; import org.apache.kudu.client.KuduScanner; import org.apache.kudu.client.RowResult; import org.apache.kudu.client.RowResultIterator; @Internal public class KuduReaderIterator { private KuduScanner scanner; private RowResultIterator rowIterator; public KuduReaderIterator(KuduScanner scanner) throws KuduException { this.scanner = scanner; nextRows(); } public void close() throws KuduException { scanner.close(); } public boolean hasNext() throws KuduException { if (rowIterator.hasNext()) { return true; } else if (scanner.hasMoreRows()) { nextRows(); return true; } else { return false; } } public Row next() { RowResult row = this.rowIterator.next(); return toFlinkRow(row); } private void nextRows() throws KuduException { this.rowIterator = scanner.nextRows(); } private Row toFlinkRow(RowResult row) { Schema schema = row.getColumnProjection(); Row values = new Row(schema.getColumnCount()); schema.getColumns().forEach(column -> { String name = column.getName(); int pos = schema.getColumnIndex(name); values.setField(pos, row.getObject(name)); }); return values; } }