| /* |
| * 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.flink.ml.feature; |
| |
| import org.apache.flink.api.common.restartstrategy.RestartStrategies; |
| import org.apache.flink.configuration.Configuration; |
| import org.apache.flink.ml.feature.regextokenizer.RegexTokenizer; |
| import org.apache.flink.ml.feature.regextokenizer.RegexTokenizerParams; |
| import org.apache.flink.ml.util.TestUtils; |
| import org.apache.flink.streaming.api.datastream.DataStream; |
| import org.apache.flink.streaming.api.environment.ExecutionCheckpointingOptions; |
| import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; |
| import org.apache.flink.table.api.Expressions; |
| import org.apache.flink.table.api.Table; |
| import org.apache.flink.table.api.bridge.java.StreamTableEnvironment; |
| import org.apache.flink.test.util.AbstractTestBase; |
| import org.apache.flink.types.Row; |
| |
| import org.apache.commons.collections.IteratorUtils; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import java.util.Arrays; |
| import java.util.Comparator; |
| import java.util.List; |
| |
| import static org.junit.Assert.assertArrayEquals; |
| import static org.junit.Assert.assertEquals; |
| |
| /** Tests {@link RegexTokenizer}. */ |
| public class RegexTokenizerTest extends AbstractTestBase { |
| private StreamTableEnvironment tEnv; |
| private StreamExecutionEnvironment env; |
| private Table inputDataTable; |
| |
| private static final List<Row> INPUT = |
| Arrays.asList(Row.of("Test for tokenization."), Row.of("Te,st. punct")); |
| |
| @Before |
| public void before() { |
| Configuration config = new Configuration(); |
| config.set(ExecutionCheckpointingOptions.ENABLE_CHECKPOINTS_AFTER_TASKS_FINISH, true); |
| env = StreamExecutionEnvironment.getExecutionEnvironment(config); |
| env.setParallelism(4); |
| env.enableCheckpointing(100); |
| env.setRestartStrategy(RestartStrategies.noRestart()); |
| tEnv = StreamTableEnvironment.create(env); |
| DataStream<Row> dataStream = env.fromCollection(INPUT); |
| inputDataTable = tEnv.fromDataStream(dataStream).as("input"); |
| } |
| |
| @Test |
| public void testParam() { |
| RegexTokenizer regexTokenizer = new RegexTokenizer(); |
| assertEquals("input", regexTokenizer.getInputCol()); |
| assertEquals("output", regexTokenizer.getOutputCol()); |
| assertEquals(1, regexTokenizer.getMinTokenLength()); |
| assertEquals(true, regexTokenizer.getGaps()); |
| assertEquals("\\s+", regexTokenizer.getPattern()); |
| assertEquals(true, regexTokenizer.getToLowercase()); |
| |
| regexTokenizer |
| .setInputCol("testInputCol") |
| .setOutputCol("testOutputCol") |
| .setMinTokenLength(3) |
| .setGaps(false) |
| .setPattern("\\s") |
| .setToLowercase(false); |
| |
| assertEquals("testInputCol", regexTokenizer.getInputCol()); |
| assertEquals("testOutputCol", regexTokenizer.getOutputCol()); |
| assertEquals(3, regexTokenizer.getMinTokenLength()); |
| assertEquals(false, regexTokenizer.getGaps()); |
| assertEquals("\\s", regexTokenizer.getPattern()); |
| assertEquals(false, regexTokenizer.getToLowercase()); |
| } |
| |
| @Test |
| public void testOutputSchema() { |
| RegexTokenizer regexTokenizer = new RegexTokenizer(); |
| inputDataTable = |
| tEnv.fromDataStream(env.fromElements(Row.of("", ""))).as("input", "dummyInput"); |
| Table output = regexTokenizer.transform(inputDataTable)[0]; |
| assertEquals( |
| Arrays.asList( |
| regexTokenizer.getInputCol(), "dummyInput", regexTokenizer.getOutputCol()), |
| output.getResolvedSchema().getColumnNames()); |
| } |
| |
| @Test |
| public void testTransform() throws Exception { |
| List<Row> expectedRows; |
| int minTokenLength = RegexTokenizerParams.MIN_TOKEN_LENGTH.defaultValue; |
| boolean gaps = RegexTokenizerParams.GAPS.defaultValue; |
| String pattern = RegexTokenizerParams.PATTERN.defaultValue; |
| boolean toLowercase = RegexTokenizerParams.TO_LOWERCASE.defaultValue; |
| |
| // default option. |
| expectedRows = |
| Arrays.asList( |
| Row.of((Object) new String[] {"test", "for", "tokenization."}), |
| Row.of((Object) new String[] {"te,st.", "punct"})); |
| checkTransform(minTokenLength, gaps, pattern, toLowercase, expectedRows); |
| |
| // default option except toLowercase = false. |
| expectedRows = |
| Arrays.asList( |
| Row.of((Object) new String[] {"Test", "for", "tokenization."}), |
| Row.of((Object) new String[] {"Te,st.", "punct"})); |
| toLowercase = false; |
| checkTransform(minTokenLength, gaps, pattern, toLowercase, expectedRows); |
| |
| // default option except gaps = false, pattern = "\\w+|\\p{Punct}". |
| expectedRows = |
| Arrays.asList( |
| Row.of((Object) new String[] {"test", "for", "tokenization", "."}), |
| Row.of((Object) new String[] {"te", ",", "st", ".", "punct"})); |
| gaps = false; |
| pattern = "\\w+|\\p{Punct}"; |
| toLowercase = true; |
| checkTransform(minTokenLength, gaps, pattern, toLowercase, expectedRows); |
| |
| // default option except gaps = false, minTokenLength = 3, pattern = "\\w+|\\p{Punct}". |
| gaps = false; |
| minTokenLength = 3; |
| pattern = "\\w+|\\p{Punct}"; |
| expectedRows = |
| Arrays.asList( |
| Row.of((Object) new String[] {"test", "for", "tokenization"}), |
| Row.of((Object) new String[] {"punct"})); |
| checkTransform(minTokenLength, gaps, pattern, toLowercase, expectedRows); |
| } |
| |
| @Test |
| public void testSaveLoadAndTransform() throws Exception { |
| RegexTokenizer regexTokenizer = new RegexTokenizer(); |
| List<Row> expectedRows = |
| Arrays.asList( |
| Row.of((Object) new String[] {"test", "for", "tokenization."}), |
| Row.of((Object) new String[] {"te,st.", "punct"})); |
| RegexTokenizer loadedRegexTokenizer = |
| TestUtils.saveAndReload( |
| tEnv, regexTokenizer, TEMPORARY_FOLDER.newFolder().getAbsolutePath()); |
| Table output = loadedRegexTokenizer.transform(inputDataTable)[0]; |
| verifyOutputResult(output, loadedRegexTokenizer.getOutputCol(), expectedRows); |
| } |
| |
| private void checkTransform( |
| int minTokenLength, |
| boolean gaps, |
| String pattern, |
| boolean toLowercase, |
| List<Row> expectedOutput) |
| throws Exception { |
| RegexTokenizer regexTokenizer = |
| new RegexTokenizer() |
| .setMinTokenLength(minTokenLength) |
| .setGaps(gaps) |
| .setPattern(pattern) |
| .setToLowercase(toLowercase); |
| Table output = regexTokenizer.transform(inputDataTable)[0]; |
| verifyOutputResult(output, regexTokenizer.getOutputCol(), expectedOutput); |
| } |
| |
| private void verifyOutputResult(Table output, String outputCol, List<Row> expectedOutput) |
| throws Exception { |
| DataStream<Row> dataStream = tEnv.toDataStream(output.select(Expressions.$(outputCol))); |
| List<Row> results = IteratorUtils.toList(dataStream.executeAndCollect()); |
| assertEquals(expectedOutput.size(), results.size()); |
| results.sort(Comparator.comparingInt(o -> ((String[]) o.getField(0))[0].hashCode())); |
| expectedOutput.sort(Comparator.comparingInt(o -> ((String[]) o.getField(0))[0].hashCode())); |
| for (int i = 0; i < expectedOutput.size(); i++) { |
| assertArrayEquals( |
| (String[]) results.get(i).getField(0), |
| (String[]) expectedOutput.get(i).getField(0)); |
| } |
| } |
| } |