| /* |
| * 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.store.easy.text.reader; |
| |
| import org.apache.drill.exec.physical.resultSet.RowSetLoader; |
| import org.apache.drill.exec.record.metadata.TupleMetadata; |
| import org.apache.drill.exec.store.easy.text.TextFormatPlugin; |
| import org.apache.drill.exec.vector.accessor.ScalarWriter; |
| |
| /** |
| * Class is responsible for generating record batches for text file inputs. We generate |
| * a record batch with a set of varchar vectors. A varchar vector contains all the field |
| * values for a given column. Each record is a single value within each vector of the set. |
| */ |
| class FieldVarCharOutput extends BaseFieldOutput { |
| |
| /** |
| * We initialize and add the varchar vector for each incoming field in this |
| * constructor. |
| * |
| * @param writer row set writer |
| */ |
| FieldVarCharOutput(RowSetLoader writer) { |
| super(writer, |
| TextFormatPlugin.MAXIMUM_NUMBER_COLUMNS, |
| makeMask(writer)); |
| } |
| |
| private static boolean[] makeMask(RowSetLoader writer) { |
| final TupleMetadata schema = writer.tupleSchema(); |
| final boolean[] projectionMask = new boolean[schema.size()]; |
| for (int i = 0; i < schema.size(); i++) { |
| projectionMask[i] = writer.column(i).isProjected(); |
| } |
| return projectionMask; |
| } |
| |
| @Override |
| public boolean endField() { |
| writeToVector(); |
| return super.endField(); |
| } |
| |
| @Override |
| protected ScalarWriter columnWriter() { |
| return writer.scalar(currentFieldIndex); |
| } |
| } |