| /* |
| * 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.mock; |
| |
| import java.util.Map; |
| import java.util.Random; |
| |
| import org.apache.drill.exec.vector.accessor.ScalarWriter; |
| |
| |
| public class VaryingStringGen extends AbstractFieldGen { |
| |
| private Random rand = new Random(); |
| private int length; |
| private int span; |
| private int deltaPerSpan; |
| private int valueCount; |
| |
| @Override |
| public void setup(ColumnDef colDef, ScalarWriter colLoader) { |
| super.setup(colDef, colLoader); |
| length = colDef.width; |
| Map<String,Object> props = colDef.mockCol.properties; |
| span = 1000; |
| deltaPerSpan = 100; |
| if (props != null) { |
| Integer value = (Integer) props.get("span"); |
| if (value != null) { |
| span = Math.max(1, value); |
| } |
| value = (Integer) props.get("delta"); |
| if (value != null) { |
| deltaPerSpan = value; |
| } |
| } |
| } |
| |
| public String value() { |
| if (valueCount++ >= span) { |
| valueCount = 0; |
| length = Math.max(0, length + deltaPerSpan); |
| } |
| String c = Character.toString((char) (rand.nextInt(26) + 'A')); |
| StringBuilder buf = new StringBuilder(); |
| for (int i = 0; i < length; i++) { |
| buf.append(c); |
| } |
| return buf.toString(); |
| } |
| |
| @Override |
| public void setValue() { |
| colWriter.setString(value()); |
| } |
| } |