From 0bdc0593115b1f482231b49493af2929163d7d13 Mon Sep 17 00:00:00 2001 From: emptyOVO Date: Wed, 2 Oct 2024 19:04:11 +0800 Subject: [PATCH] [INLONG-11223][SDK] Transform support JSON_VALUE() function --- .../process/function/JsonValueFunction.java | 65 ++++++++ .../string/TestJsonValueFunction.java | 147 ++++++++++++++++++ 2 files changed, 212 insertions(+) create mode 100644 inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/JsonValueFunction.java create mode 100644 inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/function/string/TestJsonValueFunction.java diff --git a/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/JsonValueFunction.java b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/JsonValueFunction.java new file mode 100644 index 00000000000..66a890249c8 --- /dev/null +++ b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/JsonValueFunction.java @@ -0,0 +1,65 @@ +/* + * 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 com.alibaba.fastjson.JSONPath; +import net.sf.jsqlparser.expression.Expression; +import net.sf.jsqlparser.expression.Function; + +import java.util.List; + +/** + * JsonValueFunction + * description: JSON_VALUE(jsonValue, path)--Extracts a scalar from a JSON string. + * for example: + */ +@TransformFunction(names = {"json_value"}) +public class JsonValueFunction implements ValueParser { + + private final ValueParser jsonParser; + + private final ValueParser pathParser; + + public JsonValueFunction(Function expr) { + List expressions = expr.getParameters().getExpressions(); + this.jsonParser = OperatorTools.buildParser(expressions.get(0)); + this.pathParser = OperatorTools.buildParser(expressions.get(1)); + } + + @Override + public Object parse(SourceData sourceData, int rowIndex, Context context) { + Object jsonObj = jsonParser.parse(sourceData, rowIndex, context); + Object pathObj = pathParser.parse(sourceData, rowIndex, context); + if (jsonObj == null || pathObj == null) { + return null; + } + String path = OperatorTools.parseString(pathObj); + String json = OperatorTools.parseString(jsonObj); + + if (path.isEmpty()) { + return null; + } + Object res = JSONPath.read(json, path); + return res != null ? res.toString() : null; + } +} diff --git a/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/function/string/TestJsonValueFunction.java b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/function/string/TestJsonValueFunction.java new file mode 100644 index 00000000000..c3196d30ab1 --- /dev/null +++ b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/function/string/TestJsonValueFunction.java @@ -0,0 +1,147 @@ +/* + * 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.string; + +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 TestJsonValueFunction extends AbstractFunctionStringTestBase { + + @Test + public void testJsonExistsFunction() throws Exception { + String transformSql = null, data = null; + TransformConfig config = null; + TransformProcessor processor = null; + List output = null; + transformSql = "select json_value(string1,string2) from source"; + config = new TransformConfig(transformSql); + processor = TransformProcessor + .create(config, SourceDecoderFactory.createCsvDecoder(csvSource), + SinkEncoderFactory.createKvEncoder(kvSink)); + + // case1: json_value({"a": 1}, $.a) + data = "{\"a\": 1}|$.a|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=1", output.get(0)); + + // case2: json_value({"a": null}, $.a) + data = "{\"a\": null}|$.a|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=", output.get(0)); + + // case3: json_value({"a": true}, $.b) + data = "{\"a\": true}|$.b|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=", output.get(0)); + + // case4: json_value(null, $.a) + data = "|$.a|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=", output.get(0)); + + // case5: json_value({"a": true}, null) + data = "{\"a\": true}||3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=", output.get(0)); + + // case6: json_value({\"person\": {\"name\": \"Alice\" ,\"age\": 30}}, $.person.name) + data = "{\\\"person\\\": {\\\"name\\\": \\\"Alice\\\" ,\\\"age\\\": 30}}|$.person.name|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=Alice", output.get(0)); + + // case7: json_value({\"person\": {\"name\": \"Alice\", \"age\": 30}}, $.person.address) + data = "{\\\"person\\\": {\\\"name\\\": \\\"Alice\\\", \\\"age\\\": 30}}|$.person.address|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=", output.get(0)); + + // case8: json_value({\"person\" : {\"name\" : \"Amy\" }}, $.person.name) + data = "{\\\"person\\\" : {\\\"name\\\" : \\\"Amy\\\" }}|$.person.name|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=Amy", output.get(0)); + + // case9: json_value({\"people\": [{\"name\": \"Alice\"}, {\"name\": \"Bob\"}]}, $.people[0].name) + data = "{\\\"people\\\": [{\\\"name\\\": \\\"Alice\\\"}, {\\\"name\\\": \\\"Bob\\\"}]}|$.people[0].name|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=Alice", output.get(0)); + + // case10: json_value({\"people\": [{\"name\": \"Alice\"}, {\"name\": \"Bob\"}]}, $.people[2].name) + data = "{\\\"people\\\": [{\\\"name\\\": \\\"Alice\\\"}, {\\\"name\\\": \\\"Bob\\\"}]}|$.people[2].name|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=", output.get(0)); + + // case11: json_value({\"data\": [{\"details\": {\"status\": \"active\"}}, + // {\"details\": {\"status\": \"inactive\"}}]}, $.data[1].details.status) + data = "{\\\"data\\\": [{\\\"details\\\": {\\\"status\\\": \\\"active\\\"}}, " + + "{\\\"details\\\": {\\\"status\\\": \\\"inactive\\\"}}]}|$.data[1].details.status|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=inactive", output.get(0)); + + // case12: json_value({\"records\": [{\"id\": 1, \"info\": {\"valid\": true}}, + // {\"id\": 2, \"info\": {\"valid\": false}}]}, $.records[0].info.valid) + data = "{\\\"records\\\": [{\\\"id\\\": 1, \\\"info\\\": {\\\"valid\\\": true}}, " + + "{\\\"id\\\": 2, \\\"info\\\": {\\\"valid\\\": false}}]}|$.records[0].info.valid|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=true", output.get(0)); + + // case13: json_value({"data": {"items": [{"id": 1, "details": {"price": 100}}, + // {"id": 2, "details": {"price": 200}}]}}, $.data.items[1].details.discount) + data = "{\"data\": {\"items\": [{\"id\": 1, \"details\": {\"price\": 100}}, " + + "{\"id\": 2, \"details\": {\"price\": 200}}]}}|$.data.items[1].details.discount|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=", output.get(0)); + + // case14: json_value({"items": []}, $.items[0]) + data = "{\"items\": []}|$.items[0]|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=", output.get(0)); + + // case15: json_value({\"list\": [null, {\"name\": \"John\"}]}, $.list[0]) + data = "{\\\"list\\\": [null, {\\\"name\\\": \\\"John\\\"}]}|$.list[0]|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=", output.get(0)); + + // case16: json_value({\"list\": [null, {\"name\": \"John\"}]}, $.list[1].name) + data = "{\\\"list\\\": [null, {\\\"name\\\": \\\"John\\\"}]}|$.list[1].name|3|5"; + output = processor.transform(data, new HashMap<>()); + Assert.assertEquals(1, output.size()); + Assert.assertEquals("result=John", output.get(0)); + } +}