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new 4538f9f1a1 [INLONG-10905][SDK] Transform support Length() function
(#10908)
4538f9f1a1 is described below
commit 4538f9f1a16a6dd95e98fee903693222390c0cdb
Author: Zkplo <87751516+zk...@users.noreply.github.com>
AuthorDate: Tue Aug 27 12:04:18 2024 +0800
[INLONG-10905][SDK] Transform support Length() function (#10908)
---
.../transform/process/function/LengthFunction.java | 49 ++++++++++++++++++++++
.../transform/process/operator/OperatorTools.java | 2 +
.../TestTransformStringFunctionsProcessor.java | 23 ++++++++++
3 files changed, 74 insertions(+)
diff --git
a/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/LengthFunction.java
b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/LengthFunction.java
new file mode 100644
index 0000000000..5a01652c93
--- /dev/null
+++
b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/LengthFunction.java
@@ -0,0 +1,49 @@
+/*
+ * 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;
+
+/**
+ * LengthFunction
+ * description: length(string)
+ * - return the length of the string
+ * - return NULL if the string is NULL
+ */
+public class LengthFunction implements ValueParser {
+
+ private final ValueParser stringParser;
+
+ public LengthFunction(Function expr) {
+ stringParser =
OperatorTools.buildParser(expr.getParameters().getExpressions().get(0));
+ }
+
+ @Override
+ public Object parse(SourceData sourceData, int rowIndex, Context context) {
+ Object stringObject = stringParser.parse(sourceData, rowIndex,
context);
+ if (stringObject == null) {
+ return null;
+ }
+ return OperatorTools.parseString(stringObject).length();
+ }
+}
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 72865fa279..b47d39e298 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
@@ -28,6 +28,7 @@ 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.LengthFunction;
import org.apache.inlong.sdk.transform.process.function.LnFunction;
import org.apache.inlong.sdk.transform.process.function.LocateFunction;
import org.apache.inlong.sdk.transform.process.function.Log10Function;
@@ -144,6 +145,7 @@ public class OperatorTools {
functionMap.put("unix_timestamp", UnixTimestampFunction::new);
functionMap.put("to_timestamp", ToTimestampFunction::new);
functionMap.put("to_base64", ToBase64Function::new);
+ functionMap.put("length", LengthFunction::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 5479b4485a..96cabc1717 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
@@ -200,4 +200,27 @@ public class TestTransformStringFunctionsProcessor {
Assert.assertEquals(1, output2.size());
Assert.assertEquals(output2.get(0), "result=aGVsbG8gd29ybGQ=");
}
+
+ @Test
+ public void testLengthFunction() throws Exception {
+ String transformSql = "select length(string1) from source";
+ TransformConfig config = new TransformConfig(transformSql);
+ TransformProcessor<String, String> processor1 = TransformProcessor
+ .create(config,
SourceDecoderFactory.createCsvDecoder(csvSource),
+ SinkEncoderFactory.createKvEncoder(kvSink));
+ // case1: length('hello world')
+ List<String> output1 = processor1.transform("hello
world|apple|cloud|2|1|3", new HashMap<>());
+ Assert.assertEquals(1, output1.size());
+ Assert.assertEquals("result=11", output1.get(0));
+
+ transformSql = "select length(xxd) from source";
+ config = new TransformConfig(transformSql);
+ processor1 = TransformProcessor
+ .create(config,
SourceDecoderFactory.createCsvDecoder(csvSource),
+ SinkEncoderFactory.createKvEncoder(kvSink));
+ // case2: length(null)
+ output1 = processor1.transform("hello world|apple|cloud|2|1|3", new
HashMap<>());
+ Assert.assertEquals(1, output1.size());
+ Assert.assertEquals("result=null", output1.get(0));
+ }
}
