| /* |
| * 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.hudi.util; |
| |
| import org.apache.hudi.common.util.ValidationUtils; |
| |
| import org.apache.flink.table.data.GenericRowData; |
| import org.apache.flink.table.data.RowData; |
| import org.apache.flink.table.types.logical.LogicalType; |
| import org.apache.flink.table.types.logical.RowType; |
| |
| /** |
| * Utilities to project the row data with given positions. |
| */ |
| public class RowDataProjection { |
| private final RowData.FieldGetter[] fieldGetters; |
| |
| private RowDataProjection(LogicalType[] types, int[] positions) { |
| ValidationUtils.checkArgument(types.length == positions.length, |
| "types and positions should have the equal number"); |
| this.fieldGetters = new RowData.FieldGetter[types.length]; |
| for (int i = 0; i < types.length; i++) { |
| final LogicalType type = types[i]; |
| final int pos = positions[i]; |
| this.fieldGetters[i] = RowData.createFieldGetter(type, pos); |
| } |
| } |
| |
| public static RowDataProjection instance(RowType rowType, int[] positions) { |
| final LogicalType[] types = rowType.getChildren().toArray(new LogicalType[0]); |
| return new RowDataProjection(types, positions); |
| } |
| |
| /** |
| * Returns the projected row data. |
| */ |
| public RowData project(RowData rowData) { |
| GenericRowData genericRowData = new GenericRowData(this.fieldGetters.length); |
| for (int i = 0; i < this.fieldGetters.length; i++) { |
| final Object val = this.fieldGetters[i].getFieldOrNull(rowData); |
| genericRowData.setField(i, val); |
| } |
| return genericRowData; |
| } |
| } |