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new fab6756556 [INLONG-10906][SDK] Transform supports the truncation of
left and right strings (#10923)
fab6756556 is described below
commit fab6756556abf56bef71c7b164463dbb08af33d2
Author: Zkplo <87751516+zk...@users.noreply.github.com>
AuthorDate: Wed Aug 28 11:04:34 2024 +0800
[INLONG-10906][SDK] Transform supports the truncation of left and right
strings (#10923)
---
.../transform/process/function/LeftFunction.java | 62 ++++++++++++++
.../transform/process/function/RightFunction.java | 62 ++++++++++++++
.../transform/process/operator/OperatorTools.java | 6 +-
.../TestTransformStringFunctionsProcessor.java | 97 +++++++++++++++++++++-
4 files changed, 225 insertions(+), 2 deletions(-)
diff --git
a/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/LeftFunction.java
b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/LeftFunction.java
new file mode 100644
index 0000000000..e86d770f92
--- /dev/null
+++
b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/LeftFunction.java
@@ -0,0 +1,62 @@
+/*
+ * 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;
+
+/**
+ * LeftFunction
+ * description: left(string,length)
+ * - return null if either string or length is null
+ * - return "" if it is less than or equal to zero
+ * - return a substring of length starting from the right side of the string.
+ */
+public class LeftFunction implements ValueParser {
+
+ private final ValueParser stringParser;
+ private final ValueParser lengthParser;
+
+ public LeftFunction(Function expr) {
+ List<Expression> expressions = expr.getParameters().getExpressions();
+ stringParser = OperatorTools.buildParser(expressions.get(0));
+ lengthParser = OperatorTools.buildParser(expressions.get(1));
+ }
+
+ @Override
+ public Object parse(SourceData sourceData, int rowIndex, Context context) {
+ Object stringObj = stringParser.parse(sourceData, rowIndex, context);
+ Object lengthObj = lengthParser.parse(sourceData, rowIndex, context);
+ if (stringObj == null || lengthObj == null) {
+ return null;
+ }
+ String str = OperatorTools.parseString(stringObj);
+ int len = Integer.parseInt(OperatorTools.parseString(lengthObj));
+ if (len <= 0) {
+ return "";
+ }
+ return str.substring(0, Math.min(str.length(), len));
+ }
+}
diff --git
a/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/RightFunction.java
b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/RightFunction.java
new file mode 100644
index 0000000000..8260d3f299
--- /dev/null
+++
b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/RightFunction.java
@@ -0,0 +1,62 @@
+/*
+ * 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;
+
+/**
+ * RightFunction
+ * description: right(string,length)
+ * - return null if either string or length is null
+ * - return "" if it is less than or equal to zero
+ * - return a substring of length starting from the right side of the string.
+ */
+public class RightFunction implements ValueParser {
+
+ private final ValueParser stringParser;
+ private final ValueParser lengthParser;
+
+ public RightFunction(Function expr) {
+ List<Expression> expressions = expr.getParameters().getExpressions();
+ stringParser = OperatorTools.buildParser(expressions.get(0));
+ lengthParser = OperatorTools.buildParser(expressions.get(1));
+ }
+
+ @Override
+ public Object parse(SourceData sourceData, int rowIndex, Context context) {
+ Object stringObj = stringParser.parse(sourceData, rowIndex, context);
+ Object lengthObj = lengthParser.parse(sourceData, rowIndex, context);
+ if (stringObj == null || lengthObj == null) {
+ return null;
+ }
+ String str = OperatorTools.parseString(stringObj);
+ int len = Integer.parseInt(OperatorTools.parseString(lengthObj));
+ if (len <= 0) {
+ return "";
+ }
+ return str.substring(Math.max(str.length() - len, 0));
+ }
+}
diff --git
a/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/operator/OperatorTools.java
b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/operator/OperatorTools.java
index 5dc282130b..977883f021 100644
---
a/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/operator/OperatorTools.java
+++
b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/operator/OperatorTools.java
@@ -29,6 +29,7 @@ import
org.apache.inlong.sdk.transform.process.function.DateFormatFunction;
import org.apache.inlong.sdk.transform.process.function.ExpFunction;
import org.apache.inlong.sdk.transform.process.function.FloorFunction;
import org.apache.inlong.sdk.transform.process.function.FromUnixTimeFunction;
+import org.apache.inlong.sdk.transform.process.function.LeftFunction;
import org.apache.inlong.sdk.transform.process.function.LengthFunction;
import org.apache.inlong.sdk.transform.process.function.LnFunction;
import org.apache.inlong.sdk.transform.process.function.LocalTimeFunction;
@@ -44,6 +45,7 @@ import
org.apache.inlong.sdk.transform.process.function.RandFunction;
import org.apache.inlong.sdk.transform.process.function.ReplaceFunction;
import org.apache.inlong.sdk.transform.process.function.ReplicateFunction;
import org.apache.inlong.sdk.transform.process.function.ReverseFunction;
+import org.apache.inlong.sdk.transform.process.function.RightFunction;
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;
@@ -106,7 +108,7 @@ import java.util.Map;
/**
* OperatorTools
- *
+ *
*/
public class OperatorTools {
@@ -169,6 +171,8 @@ public class OperatorTools {
functionMap.put("upper", UpperFunction::new);
functionMap.put("length", LengthFunction::new);
functionMap.put("replace", ReplaceFunction::new);
+ functionMap.put("left", LeftFunction::new);
+ functionMap.put("right", RightFunction::new);
}
public static ExpressionOperator buildOperator(Expression expr) {
diff --git
a/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformStringFunctionsProcessor.java
b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformStringFunctionsProcessor.java
index 97d0074d23..f28e9ac50e 100644
---
a/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformStringFunctionsProcessor.java
+++
b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformStringFunctionsProcessor.java
@@ -175,7 +175,6 @@ public class TestTransformStringFunctionsProcessor {
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";
@@ -347,4 +346,100 @@ public class TestTransformStringFunctionsProcessor {
Assert.assertEquals(1, output7.size());
Assert.assertEquals(output7.get(0), "result=da");
}
+
+ @Test
+ public void testRightFunction() throws Exception {
+ String transformSql = "select right(string1,numeric1) from source";
+ TransformConfig config = new TransformConfig(transformSql);
+ TransformProcessor<String, String> processor1 = TransformProcessor
+ .create(config,
SourceDecoderFactory.createCsvDecoder(csvSource),
+ SinkEncoderFactory.createKvEncoder(kvSink));
+ // case1: right('hello world',5)
+ String data = "hello world|banana|cloud|5|3|3";
+ List<String> output1 = processor1.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output1.size());
+ Assert.assertEquals("result=world", output1.get(0));
+
+ // case2: right('hello world',-15)
+ data = "hello world|banana|cloud|-15|3|3";
+ output1 = processor1.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output1.size());
+ Assert.assertEquals("result=", output1.get(0));
+
+ // case3: right('hello world',100)
+ data = "hello world|banana|cloud|100|3|3";
+ output1 = processor1.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output1.size());
+ Assert.assertEquals("result=hello world", output1.get(0));
+
+ // case4: right(null,5)
+ transformSql = "select right(xxd,numeric1) from source";
+ config = new TransformConfig(transformSql);
+ processor1 = TransformProcessor
+ .create(config,
SourceDecoderFactory.createCsvDecoder(csvSource),
+ SinkEncoderFactory.createKvEncoder(kvSink));
+ data = "hello world|banana|cloud|5|3|3";
+ output1 = processor1.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output1.size());
+ Assert.assertEquals("result=null", output1.get(0));
+
+ // case5: right('hello world',null)
+ transformSql = "select right(string1,xxd) from source";
+ config = new TransformConfig(transformSql);
+ processor1 = TransformProcessor
+ .create(config,
SourceDecoderFactory.createCsvDecoder(csvSource),
+ SinkEncoderFactory.createKvEncoder(kvSink));
+ data = "hello world|banana|cloud|5|3|3";
+ output1 = processor1.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output1.size());
+ Assert.assertEquals("result=null", output1.get(0));
+ }
+
+ @Test
+ public void testLeftFunction() throws Exception {
+ String transformSql = "select left(string1,numeric1) from source";
+ TransformConfig config = new TransformConfig(transformSql);
+ TransformProcessor<String, String> processor1 = TransformProcessor
+ .create(config,
SourceDecoderFactory.createCsvDecoder(csvSource),
+ SinkEncoderFactory.createKvEncoder(kvSink));
+ // case1: left('hello world',5)
+ String data = "hello world|banana|cloud|5|3|3";
+ List<String> output1 = processor1.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output1.size());
+ Assert.assertEquals("result=hello", output1.get(0));
+
+ // case2: left('hello world',-15)
+ data = "hello world|banana|cloud|-15|3|3";
+ output1 = processor1.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output1.size());
+ Assert.assertEquals("result=", output1.get(0));
+
+ // case3: left('hello world',100)
+ data = "hello world|banana|cloud|100|3|3";
+ output1 = processor1.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output1.size());
+ Assert.assertEquals("result=hello world", output1.get(0));
+
+ // case4: left(null,5)
+ transformSql = "select left(xxd,numeric1) from source";
+ config = new TransformConfig(transformSql);
+ processor1 = TransformProcessor
+ .create(config,
SourceDecoderFactory.createCsvDecoder(csvSource),
+ SinkEncoderFactory.createKvEncoder(kvSink));
+ data = "hello world|banana|cloud|5|3|3";
+ output1 = processor1.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output1.size());
+ Assert.assertEquals("result=null", output1.get(0));
+
+ // case5: left('hello world',null)
+ transformSql = "select left(string1,xxd) from source";
+ config = new TransformConfig(transformSql);
+ processor1 = TransformProcessor
+ .create(config,
SourceDecoderFactory.createCsvDecoder(csvSource),
+ SinkEncoderFactory.createKvEncoder(kvSink));
+ data = "hello world|banana|cloud|5|3|3";
+ output1 = processor1.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output1.size());
+ Assert.assertEquals("result=null", output1.get(0));
+ }
}
