yunfengzhou-hub commented on code in PR #130: URL: https://github.com/apache/flink-ml/pull/130#discussion_r924009394
########## flink-ml-lib/src/main/java/org/apache/flink/ml/feature/regextokenizer/RegexTokenizerParams.java: ########## @@ -0,0 +1,77 @@ +/* + * 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.regextokenizer; + +import org.apache.flink.ml.common.param.HasInputCol; +import org.apache.flink.ml.common.param.HasOutputCol; +import org.apache.flink.ml.param.BooleanParam; +import org.apache.flink.ml.param.IntParam; +import org.apache.flink.ml.param.ParamValidators; +import org.apache.flink.ml.param.StringParam; + +/** + * Params for {@link RegexTokenizer}. + * + * @param <T> The class type of this instance. + */ +public interface RegexTokenizerParams<T> extends HasInputCol<T>, HasOutputCol<T> { + IntParam MIN_TOKEN_LENGTH = + new IntParam("minTokenLength", "Minimum token length", 1, ParamValidators.gtEq(0)); + BooleanParam GAPS = new BooleanParam("gaps", "Set regex to match gaps or tokens", true); + + StringParam PATTERN = new StringParam("pattern", "Regex pattern used for tokenizing", "\\s+"); + + BooleanParam TO_LOWERCASE = + new BooleanParam( + "toLowercase", + "Whether to convert all characters to lowercase before tokenizing", + true); + + default T setMinTokenLength(int value) { + return set(MIN_TOKEN_LENGTH, value); + } + + default Integer getMinTokenLength() { Review Comment: we can make this method return `int` instead of `Integer`, as `HasMaxIter` has done, and remove the `intValue()` in tests. ########## flink-ml-examples/src/main/java/org/apache/flink/ml/examples/feature/RegexTokenizerExample.java: ########## @@ -0,0 +1,61 @@ +/* + * 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.examples.feature; + +import org.apache.flink.ml.feature.regextokenizer.RegexTokenizer; +import org.apache.flink.streaming.api.datastream.DataStream; +import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; +import org.apache.flink.table.api.Table; +import org.apache.flink.table.api.bridge.java.StreamTableEnvironment; +import org.apache.flink.types.Row; +import org.apache.flink.util.CloseableIterator; + +import java.util.Arrays; + +/** Simple program that creates a RegexTokenizer instance and uses it for feature engineering. */ +public class RegexTokenizerExample { + public static void main(String[] args) { + StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); + StreamTableEnvironment tEnv = StreamTableEnvironment.create(env); + + // Generates input data. + DataStream<Row> inputStream = + env.fromElements(Row.of("Test for tokenization."), Row.of("Te,st. punct")); + Table inputTable = tEnv.fromDataStream(inputStream).as("input"); + + // Creates a RegexTokenizer object and initializes its parameters. + RegexTokenizer regexTokenizer = + new RegexTokenizer().setInputCol("input").setOutputCol("output"); Review Comment: It might be better to add a `setPattern()` here to show the distinguished function of RegexTokenizer from Tokenizer. ########## flink-ml-lib/src/main/java/org/apache/flink/ml/feature/regextokenizer/RegexTokenizerParams.java: ########## @@ -0,0 +1,77 @@ +/* + * 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.regextokenizer; + +import org.apache.flink.ml.common.param.HasInputCol; +import org.apache.flink.ml.common.param.HasOutputCol; +import org.apache.flink.ml.param.BooleanParam; +import org.apache.flink.ml.param.IntParam; +import org.apache.flink.ml.param.ParamValidators; +import org.apache.flink.ml.param.StringParam; + +/** + * Params for {@link RegexTokenizer}. + * + * @param <T> The class type of this instance. + */ +public interface RegexTokenizerParams<T> extends HasInputCol<T>, HasOutputCol<T> { + IntParam MIN_TOKEN_LENGTH = + new IntParam("minTokenLength", "Minimum token length", 1, ParamValidators.gtEq(0)); + BooleanParam GAPS = new BooleanParam("gaps", "Set regex to match gaps or tokens", true); Review Comment: nit: adding a blank line above this line might be better. -- This is an automated message from the Apache Git Service. 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