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Merge branch 'apache:master' into INLONG-10882
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MOONSakura0614 authored Sep 10, 2024
2 parents 70c6b93 + 5b0eb6d commit 478bed6
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/*
* 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.inlong.sdk.transform.process.function;

import org.apache.inlong.sdk.transform.decode.SourceData;
import org.apache.inlong.sdk.transform.process.Context;
import org.apache.inlong.sdk.transform.process.operator.OperatorTools;
import org.apache.inlong.sdk.transform.process.parser.ValueParser;

import net.sf.jsqlparser.expression.Expression;
import net.sf.jsqlparser.expression.Function;

import java.util.List;
import java.util.Random;

/**
* RandIntegerFunction
* description: RAND_INTEGER(INT1)--Returns a pseudorandom integer value in the range [0, INT)
* RAND_INTEGER(INT1, INT2)--Returns a pseudorandom integer value in the range [0, INT1) with an initial seed INT2.
* Two RAND_INTEGER functions will return idential sequences of numbers if they have the same initial seed and bound.
*/
@TransformFunction(names = {"rand_integer"})
public class RandIntegerFunction implements ValueParser {

private ValueParser firstIntParser;

private ValueParser secondIntParser;

private Random random;

public RandIntegerFunction(Function expr) {
random = new Random();
List<Expression> expressions = expr.getParameters().getExpressions();
if (expressions != null) {
firstIntParser = OperatorTools.buildParser(expressions.get(0));
if (expressions.size() >= 2) {
secondIntParser = OperatorTools.buildParser(expressions.get(1));
}
}
}
@Override
public Object parse(SourceData sourceData, int rowIndex, Context context) {
Object firstIntObj = firstIntParser.parse(sourceData, rowIndex, context);
int firstInt = OperatorTools.parseBigDecimal(firstIntObj).intValue();
if (secondIntParser != null) {
Object secondIntObj = secondIntParser.parse(sourceData, rowIndex, context);
int secondInt = OperatorTools.parseBigDecimal(secondIntObj).intValue();
return randInteger(firstInt, secondInt);
}
return randInteger(firstInt);
}

private int randInteger(int range) {
return random.nextInt(range);
}

private int randInteger(int range, int seed) {
random.setSeed(seed);
return random.nextInt(range);
}
}
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/*
* 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.inlong.sdk.transform.process.function.arithmetic;

import org.apache.inlong.sdk.transform.decode.SourceDecoderFactory;
import org.apache.inlong.sdk.transform.encode.SinkEncoderFactory;
import org.apache.inlong.sdk.transform.pojo.TransformConfig;
import org.apache.inlong.sdk.transform.process.TransformProcessor;

import org.junit.Assert;
import org.junit.Test;

import java.util.HashMap;
import java.util.List;
import java.util.Random;

public class TestRandIntegerFunction extends AbstractFunctionArithmeticTestBase {

@Test
public void testRandIntegerFunction() throws Exception {
String transformSql1 = "select rand_integer(numeric1) from source";
TransformConfig config1 = new TransformConfig(transformSql1);
TransformProcessor<String, String> processor1 = TransformProcessor
.create(config1, SourceDecoderFactory.createCsvDecoder(csvSource),
SinkEncoderFactory.createKvEncoder(kvSink));
// case: rand_integer(10)
List<String> output1 = processor1.transform("10|4|6|8", new HashMap<>());
Assert.assertEquals(1, output1.size());
int res1 = Integer.parseInt(output1.get(0).substring(7));
Assert.assertTrue(res1 >= 0 && res1 < 10);
// case: rand_integer(89)
List<String> output2 = processor1.transform("89|4|6|8", new HashMap<>());
Assert.assertEquals(1, output2.size());
int res2 = Integer.parseInt(output2.get(0).substring(7));
Assert.assertTrue(res2 >= 0 && res2 < 89);
String transformSql2 = "select rand_integer(numeric1,numeric2) from source";
TransformConfig config2 = new TransformConfig(transformSql2);
TransformProcessor<String, String> processor2 = TransformProcessor
.create(config2, SourceDecoderFactory.createCsvDecoder(csvSource),
SinkEncoderFactory.createKvEncoder(kvSink));
// case: rand_integer(88, 89)
List<String> output3 = processor2.transform("88|89||", new HashMap<>());
Assert.assertEquals(1, output3.size());
Assert.assertEquals(output3.get(0), "result=" + new Random(89).nextInt(88));
}
}

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