[INLONG-10826][SDK] Transform support TRIM(), REPLICATE() function (a…

…pache#10827)

inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/ReplicateFunction.java

@@ -0,0 +1,71 @@
+/*
+ * 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;
+/**
+ * ReplicateFunction
+ * description: replicate(string, numeric)--Repeat the string numeric times and return a new string
+ */
+public class ReplicateFunction implements ValueParser {
+
+    private ValueParser stringParser;
+
+    private ValueParser countParser;
+
+    public ReplicateFunction(Function expr) {
+        List<Expression> expressions = expr.getParameters().getExpressions();
+        stringParser = OperatorTools.buildParser(expressions.get(0));
+        countParser = OperatorTools.buildParser(expressions.get(1));
+    }
+
+    @Override
+    public Object parse(SourceData sourceData, int rowIndex, Context context) {
+        Object stringObj = stringParser.parse(sourceData, rowIndex, context);
+        Object countObj = countParser.parse(sourceData, rowIndex, context);
+        String str = OperatorTools.parseString(stringObj);
+        double count = OperatorTools.parseBigDecimal(countObj).doubleValue();
+        return repeat(str, count);
+    }
+    private String repeat(String str, double count) {
+        if (count == 0) {
+            return "";
+        }
+        if (count == 1) {
+            return str;
+        }
+        StringBuilder repeatedStr = new StringBuilder();
+        StringBuilder originStr = new StringBuilder(str);
+        while (count > 0) {
+            if (count % 2 != 0) {
+                repeatedStr.append(originStr);
+            }
+            count = Math.floor(count / 2);
+            originStr.append(originStr);
+        }
+        return repeatedStr.toString();
+    }
+}

inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/TrimFunction.java

@@ -0,0 +1,44 @@
+/*
+ * 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.Function;
+
+/**
+ * TrimFunction
+ * description: trim(string)--Remove Spaces before and after the string.
+ */
+public class TrimFunction implements ValueParser {
+
+    private ValueParser stringParser;
+
+    public TrimFunction(Function expr) {
+        stringParser = OperatorTools.buildParser(expr.getParameters().getExpressions().get(0));
+    }
+
+    @Override
+    public Object parse(SourceData sourceData, int rowIndex, Context context) {
+        Object stringObj = stringParser.parse(sourceData, rowIndex, context);
+        return OperatorTools.parseString(stringObj).trim();
+    }
+}

inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/operator/OperatorTools.java

@@ -34,6 +34,7 @@
 import org.apache.inlong.sdk.transform.process.function.LogFunction;
 import org.apache.inlong.sdk.transform.process.function.NowFunction;
 import org.apache.inlong.sdk.transform.process.function.PowerFunction;
+import org.apache.inlong.sdk.transform.process.function.ReplicateFunction;
 import org.apache.inlong.sdk.transform.process.function.RoundFunction;
 import org.apache.inlong.sdk.transform.process.function.SinFunction;
 import org.apache.inlong.sdk.transform.process.function.SinhFunction;
@@ -42,6 +43,7 @@
 import org.apache.inlong.sdk.transform.process.function.TimestampExtractFunction;
 import org.apache.inlong.sdk.transform.process.function.ToDateFunction;
 import org.apache.inlong.sdk.transform.process.function.ToTimestampFunction;
+import org.apache.inlong.sdk.transform.process.function.TrimFunction;
 import org.apache.inlong.sdk.transform.process.function.UnixTimestampFunction;
 import org.apache.inlong.sdk.transform.process.parser.AdditionParser;
 import org.apache.inlong.sdk.transform.process.parser.ColumnParser;
@@ -108,6 +110,8 @@ public class OperatorTools {
         functionMap.put("log", LogFunction::new);
         functionMap.put("exp", ExpFunction::new);
         functionMap.put("substring", SubstringFunction::new);
+        functionMap.put("trim", TrimFunction::new);
+        functionMap.put("replicate", ReplicateFunction::new);
         functionMap.put("locate", LocateFunction::new);
         functionMap.put("to_date", ToDateFunction::new);
         functionMap.put("date_format", DateFormatFunction::new);

inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformStringFunctionsProcessor.java

@@ -118,4 +118,70 @@ public void testLocateFunction() throws Exception {
         Assert.assertEquals(1, output5.size());
         Assert.assertEquals(output5.get(0), "result=null");
     }
+    @Test
+    public void testReplicateFunction() throws Exception {
+        String transformSql1 = "select replicate(string1, numeric1) from source";
+        TransformConfig config1 = new TransformConfig(transformSql1);
+        TransformProcessor<String, String> processor1 = TransformProcessor
+                .create(config1, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        // case1: replicate('apple', 2)
+        List<String> output1 = processor1.transform("apple|banana|cloud|2|1|3", new HashMap<>());
+        Assert.assertEquals(1, output1.size());
+        Assert.assertEquals(output1.get(0), "result=appleapple");
+        String transformSql2 = "select replicate(string2, numeric2) from source";
+        TransformConfig config2 = new TransformConfig(transformSql2);
+        TransformProcessor<String, String> processor2 = TransformProcessor
+                .create(config2, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        // case2: replicate('banana', 3)
+        List<String> output2 = processor2.transform("apple|banana|cloud|1|3|3", new HashMap<>());
+        Assert.assertEquals(1, output2.size());
+        Assert.assertEquals(output2.get(0), "result=bananabananabanana");
+        // case3: replicate('banana', 1)
+        List<String> output3 = processor2.transform("apple|banana|cloud|1|1|3", new HashMap<>());
+        Assert.assertEquals(1, output2.size());
+        Assert.assertEquals(output3.get(0), "result=banana");
+        // case3: replicate('cloud', 0)
+        String transformSql3 = "select replicate(string3, numeric3) from source";
+        TransformConfig config3 = new TransformConfig(transformSql3);
+        TransformProcessor<String, String> processor3 = TransformProcessor
+                .create(config3, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        List<String> output4 = processor3.transform("apple|banana|cloud|2|1|0", new HashMap<>());
+        Assert.assertEquals(1, output4.size());
+        Assert.assertEquals(output4.get(0), "result=");
+    }
+
+    @Test
+    public void testTrimFunction() throws Exception {
+        String transformSql1 = "select trim(string1) from source";
+        TransformConfig config1 = new TransformConfig(transformSql1);
+        TransformProcessor<String, String> processor1 = TransformProcessor
+                .create(config1, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        // case1: trim(' in long')
+        List<String> output1 = processor1.transform(" in long|in long | in long ", new HashMap<>());
+        Assert.assertEquals(1, output1.size());
+        Assert.assertEquals(output1.get(0), "result=in long");
+        String transformSql2 = "select trim(string2) from source";
+        TransformConfig config2 = new TransformConfig(transformSql2);
+        TransformProcessor<String, String> processor2 = TransformProcessor
+                .create(config2, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        // case2: trim('in long ')
+        List<String> output2 = processor2.transform(" in long|in long | in long ", new HashMap<>());
+        Assert.assertEquals(1, output2.size());
+        Assert.assertEquals(output2.get(0), "result=in long");
+        String transformSql3 = "select trim(string2) from source";
+        TransformConfig config3 = new TransformConfig(transformSql2);
+        TransformProcessor<String, String> processor3 = TransformProcessor
+                .create(config2, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        // case3: trim(' in long ')
+        List<String> output3 = processor3.transform(" in long|in long | in long ", new HashMap<>());
+        Assert.assertEquals(1, output3.size());
+        Assert.assertEquals(output3.get(0), "result=in long");
+    }
+
 }