| /* |
| * 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.text.SimpleDateFormat; |
| import java.util.Date; |
| |
| /** |
| * Very simple date value generator that produces ISO dates |
| * uniformly distributed over the last year. ISO format |
| * is: 2016-12-07. |
| * <p> |
| * There are many possible date formats; this class does not |
| * attempt to generate all of them. Drill provides a date |
| * type, but we use a string format because example cases from |
| * people using the product often read text files. Finally, we |
| * (reluctantly) use the old-style date formats instead of the |
| * new Java 8 classes because Drill prefers to build with Java 7. |
| */ |
| |
| public class DateGen extends AbstractFieldGen { |
| |
| private final int ONE_DAY = 24 * 60 * 60 * 1000; |
| private final int ONE_YEAR = ONE_DAY * 365; |
| |
| private long baseTime; |
| private SimpleDateFormat fmt; |
| |
| public DateGen() { |
| // Start a year ago. |
| baseTime = System.currentTimeMillis() - ONE_YEAR; |
| fmt = new SimpleDateFormat("yyyy-mm-DD"); |
| } |
| |
| @Override |
| public void setValue() { |
| long randTime = baseTime + baseTime + rand.nextInt(365) * ONE_DAY; |
| String str = fmt.format(new Date(randTime)); |
| colWriter.setString(str); |
| } |
| } |