[INLONG-11305][SDK] Transform SQL supports "JSON_SET" function (#11346)

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

@@ -0,0 +1,105 @@
+/*
+ * 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.json;
+
+import org.apache.inlong.sdk.transform.decode.SourceData;
+import org.apache.inlong.sdk.transform.process.Context;
+import org.apache.inlong.sdk.transform.process.function.TransformFunction;
+import org.apache.inlong.sdk.transform.process.operator.OperatorTools;
+import org.apache.inlong.sdk.transform.process.parser.ValueParser;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.JSONPath;
+import net.sf.jsqlparser.expression.Expression;
+import net.sf.jsqlparser.expression.Function;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * JsonSetFunction   ->  JSON_SET(json_doc, path, val[, path, val, ...] )
+ * description:
+ * - return NULL if any argument is NULL or the 'json_doc' argument is not a valid JSON document or any path argument
+ *          is not a valid path expression or contains a * or ** wildcard;
+ * - return the result of inserting or updating data in 'json_doc'.
+ */
+@TransformFunction(names = {
+        "json_set"}, parameter = "(String json_doc, String path1, String val1[, String path2, String val2, ...] )", descriptions = {
+                "- Return \"\" if any argument is NULL or the 'json_doc' argument is not a valid JSON document or any path argument"
+                        +
+                        " is not a valid path expression or contains a * or ** wildcard;",
+                "- Return the result of inserting or updating data in 'json_doc'."
+        }, examples = {
+                "json_set({\\\"name\\\":\\\"Alice\\\"},\"$.name\",\"inlong\") = {\"name\":\"inlong\"}"
+        })
+public class JsonSetFunction implements ValueParser {
+
+    private ValueParser jsonDocParser;
+    private List<ValueParser> pathValuePairsParser;
+
+    public JsonSetFunction(Function expr) {
+        List<Expression> expressions = expr.getParameters().getExpressions();
+        jsonDocParser = OperatorTools.buildParser(expressions.get(0));
+        pathValuePairsParser = new ArrayList<>();
+        for (int i = 1; i < expressions.size(); i++) {
+            pathValuePairsParser.add(OperatorTools.buildParser(expressions.get(i)));
+        }
+    }
+
+    @Override
+    public Object parse(SourceData sourceData, int rowIndex, Context context) {
+        Object jsonDocObj = jsonDocParser.parse(sourceData, rowIndex, context);
+        if (jsonDocObj == null) {
+            return null;
+        }
+        ArrayList<Object> pathValuePairs = new ArrayList<>();
+        for (ValueParser valueParser : pathValuePairsParser) {
+            pathValuePairs.add(valueParser.parse(sourceData, rowIndex, context));
+        }
+        return jsonSet(jsonDocObj.toString(), pathValuePairs);
+    }
+
+    private String jsonSet(String jsonDoc, ArrayList<Object> pathValuePairs) {
+        if (jsonDoc == null || pathValuePairs == null || pathValuePairs.size() % 2 != 0) {
+            return null;
+        }
+
+        Object json = JSON.parse(jsonDoc);
+
+        for (int i = 0; i < pathValuePairs.size(); i += 2) {
+            String path = (String) pathValuePairs.get(i);
+            Object value = pathValuePairs.get(i + 1);
+
+            if (path == null || path.contains("*") || path.contains("**")) {
+                throw new IllegalArgumentException("Invalid path expression: " + path);
+            }
+            if ("$".equals(path)) {
+                json = JSON.parse(value.toString());
+                continue;
+            }
+            // Insert or update data, if the path does not exist, insert new data
+            try {
+                JSONPath.set(json, path, JSON.parse(value.toString()));
+            } catch (Exception ignored) {
+                JSONPath.set(json, path, value);
+            }
+        }
+
+        return json.toString();
+    }
+}

inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/function/json/TestJsonSetFunction.java

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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.json;
+
+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;
+
+public class TestJsonSetFunction extends AbstractFunctionJsonTestBase {
+
+    @Test
+    public void testJsonSetFunction() throws Exception {
+        String transformSql = null, data = null;
+        TransformConfig config = null;
+        TransformProcessor<String, String> processor = null;
+        List<String> output = null;
+
+        transformSql = "select json_set(string1,string2,string3) from source";
+        config = new TransformConfig(transformSql);
+        processor = TransformProcessor
+                .create(config, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+
+        // case1: json_set(json_doc,$.address,Wonderland)
+        String json_doc = "{\\\"name\\\":\\\"Alice\\\"}";
+        data = json_doc + "|$.address|Wonderland|";
+        output = processor.transform(data, new HashMap<>());
+        Assert.assertEquals(1, output.size());
+        Assert.assertEquals("result={\"address\":\"Wonderland\",\"name\":\"Alice\"}", output.get(0));
+
+        // case2: json_set(json_doc,$.name,inlong)
+        json_doc = "{\\\"name\\\":\\\"Alice\\\"}";
+        data = json_doc + "|$.name|inlong|";
+        output = processor.transform(data, new HashMap<>());
+        Assert.assertEquals(1, output.size());
+        Assert.assertEquals("result={\"name\":\"inlong\"}", output.get(0));
+
+        transformSql = "select json_set(string1,string2,string3,numeric1,numeric2) from source";
+        config = new TransformConfig(transformSql);
+        processor = TransformProcessor
+                .create(config, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+
+        // case3: json_set(json_doc,$,{"newKey":"newValue"},$.newKey,"new1")
+        json_doc = "{\\\"name\\\":\\\"Alice\\\"}";
+        data = json_doc + "|$|{\\\"newKey\\\":\\\"newValue\\\"}|\"$.newKey\"|\"new1\"";
+        output = processor.transform(data, new HashMap<>());
+        Assert.assertEquals(1, output.size());
+        Assert.assertEquals("result={\"newKey\":\"new1\"}", output.get(0));
+    }
+}