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new dd37068048 [INLONG-11216][SDK] Transform support STR_TO_MAP() function
(#11232)
dd37068048 is described below
commit dd3706804872a3d284d08a6b95d4e9c77cd1837b
Author: emptyOVO <[email protected]>
AuthorDate: Tue Oct 8 13:06:26 2024 +0800
[INLONG-11216][SDK] Transform support STR_TO_MAP() function (#11232)
---
.../process/function/StrToMapFunction.java | 103 +++++++++++++++++++++
.../function/string/TestStrToMapFunction.java | 94 +++++++++++++++++++
2 files changed, 197 insertions(+)
diff --git
a/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/StrToMapFunction.java
b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/StrToMapFunction.java
new file mode 100644
index 0000000000..06c4613380
--- /dev/null
+++
b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/StrToMapFunction.java
@@ -0,0 +1,103 @@
+/*
+ * 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.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+/**
+ * StrToMapFunction
+ * description: str_to_map(string1, string2, string3) - Returns a map after
splitting the string1 into key/value pairs
+ * using delimiters. string2 is the pair delimiter, default is
‘,’. And string3 is the key-value delimiter,
+ * default is ‘=’. Both pair delimiter and key-value delimiter
are treated as regular expressions.So special
+ * characters (e.g. <([{^-=$!|]})?*+.>) need to be properly
escaped before using as a delimiter literally.
+ * for example: STR_TO_MAP('item1:10,item2:5,item3:2', ':', ',')--{'item1' ->
10, 'item2' -> 5, 'item3' -> 2}
+ */
+@TransformFunction(names = {"str_to_map"})
+public class StrToMapFunction implements ValueParser {
+
+ private ValueParser inputParser;
+
+ private ValueParser pairDelimiterParser;
+
+ private ValueParser kvDelimiterParser;
+
+ public StrToMapFunction(Function expr) {
+ List<Expression> expressions = expr.getParameters().getExpressions();
+ if (!expressions.isEmpty()) {
+ inputParser = OperatorTools.buildParser(expressions.get(0));
+ if (expressions.size() >= 2) {
+ pairDelimiterParser =
OperatorTools.buildParser(expressions.get(1));
+ if (expressions.size() >= 3) {
+ kvDelimiterParser =
OperatorTools.buildParser(expressions.get(2));
+ }
+ }
+ }
+ }
+
+ @Override
+ public Object parse(SourceData sourceData, int rowIndex, Context context) {
+ Object inputStringObj = inputParser.parse(sourceData, rowIndex,
context);
+ Object pairDelimiterStringObj = null;
+ String pairDelimiterString = null;
+ if (pairDelimiterParser != null) {
+ pairDelimiterStringObj = pairDelimiterParser.parse(sourceData,
rowIndex, context);
+ pairDelimiterString =
OperatorTools.parseString(pairDelimiterStringObj);
+ }
+ Object kvDelimiterStringObj = null;
+ String kvDelimiterString = null;
+ if (kvDelimiterParser != null) {
+ kvDelimiterStringObj = kvDelimiterParser.parse(sourceData,
rowIndex, context);
+ kvDelimiterString =
OperatorTools.parseString(kvDelimiterStringObj);
+ }
+ String inputString = OperatorTools.parseString(inputStringObj);
+
+ return getStringStringMap(pairDelimiterString, kvDelimiterString,
inputString);
+ }
+
+ private Map<String, String> getStringStringMap(String pairDelimiterString,
String kvDelimiterString,
+ String inputString) {
+ String pairDelimiter =
+ (pairDelimiterString == null || pairDelimiterString.isEmpty())
? "," : escapeRegex(pairDelimiterString);
+ String keyValueDelimiter =
+ (kvDelimiterString == null || kvDelimiterString.isEmpty()) ?
"=" : escapeRegex(kvDelimiterString);
+
+ Map<String, String> map = new LinkedHashMap<>();
+ String[] pairs = inputString.split(pairDelimiter);
+
+ for (String pair : pairs) {
+ if (pair.contains(keyValueDelimiter)) {
+ String[] keyValue = pair.split(keyValueDelimiter, 2);
+ map.put(keyValue[0], keyValue[1]);
+ }
+ }
+ return map;
+ }
+
+ private String escapeRegex(String delimiter) {
+ return delimiter.replaceAll("([\\\\^$|?*+\\[\\](){}])", "\\\\$1");
+ }
+}
diff --git
a/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/function/string/TestStrToMapFunction.java
b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/function/string/TestStrToMapFunction.java
new file mode 100644
index 0000000000..627c2755ea
--- /dev/null
+++
b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/function/string/TestStrToMapFunction.java
@@ -0,0 +1,94 @@
+/*
+ * 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 TestStrToMapFunction extends AbstractFunctionStringTestBase {
+
+ @Test
+ public void testStrToMapFunction() throws Exception {
+ String transformSql = null, data = null;
+ TransformConfig config = null;
+ TransformProcessor<String, String> processor = null;
+ List<String> output = null;
+
+ transformSql = "select str_to_map(string1) from source";
+ config = new TransformConfig(transformSql);
+ processor = TransformProcessor
+ .create(config,
SourceDecoderFactory.createCsvDecoder(csvSource),
+ SinkEncoderFactory.createKvEncoder(kvSink));
+
+ // case1: str_to_map('key1=value1,key2=value2,key3=value3')
+ data = "key1=value1,key2=value2,key3=value3|xxd|cloud|7|3|3";
+ output = processor.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output.size());
+ Assert.assertEquals("result={key1=value1, key2=value2, key3=value3}",
output.get(0));
+
+ // case2: str_to_map('key1=,key2=,key3=')
+ data = "key1=,key2=,key3=|xxd|cloud|7|3|3";
+ output = processor.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output.size());
+ Assert.assertEquals("result={key1=, key2=, key3=}", output.get(0));
+
+ // case3: str_to_map('key1value1,key2value2,key3value3')
+ data = "key1value1,key2value2,key3value3|xxd|cloud|7|3|3";
+ output = processor.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output.size());
+ Assert.assertEquals("result={}", output.get(0));
+
+ // case4: str_to_map("")
+ data = "|xxd|cloud|7|3|3";
+ output = processor.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output.size());
+ Assert.assertEquals("result={}", output.get(0));
+
+ transformSql = "select str_to_map(string1,string2,string3) from
source";
+ config = new TransformConfig(transformSql);
+ processor = TransformProcessor
+ .create(config,
SourceDecoderFactory.createCsvDecoder(csvSource),
+ SinkEncoderFactory.createKvEncoder(kvSink));
+
+ // case5: str_to_map("item1:10,item2:5,item3" , "," , ":")
+ data = "item1:10,item2:5,item3:2|,|:|7|3|3";
+ output = processor.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output.size());
+ Assert.assertEquals("result={item1=10, item2=5, item3=2}",
output.get(0));
+
+ // case6: str_to_map("name->John!age->30!city->China" , "!" , "->")
+ data = "name->John!age->30!city->China|!|->|7|3|3";
+ output = processor.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output.size());
+ Assert.assertEquals("result={name=John, age=30, city=China}",
output.get(0));
+
+ // case7: str_to_map("name->John!age->30!city->China" , null , "->")
+ data = "name->John,age->30,city->China||->|7|3|3";
+ output = processor.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output.size());
+ Assert.assertEquals("result={name=John, age=30, city=China}",
output.get(0));
+ }
+}
