v1

README.md

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+# JsonFlattener
+Flatten JSON to CSV. Based on https://github.com/opendevl/Json2Flat
+
+-----------------------------------
+INSTRUCTIONS:
+
+1) Create a filedocument (or a specialization of a filedocument) in a microflow
+2) Add the java action to your microflow and add a JSON string and the created filedocument as input parameters
+
+Dependencies:
+
+- Mendix Runtime 9.24.29 or higher

src/jsonflattener/actions/FlattenJsonToCsv.java

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+// This file was generated by Mendix Studio Pro.
+//
+// WARNING: Only the following code will be retained when actions are regenerated:
+// - the import list
+// - the code between BEGIN USER CODE and END USER CODE
+// - the code between BEGIN EXTRA CODE and END EXTRA CODE
+// Other code you write will be lost the next time you deploy the project.
+// Special characters, e.g., é, ö, à, etc. are supported in comments.
+
+package jsonflattener.actions;
+
+import com.mendix.core.Core;
+import com.mendix.systemwideinterfaces.core.IContext;
+import com.mendix.systemwideinterfaces.core.IMendixObject;
+import com.mendix.webui.CustomJavaAction;
+import java.io.ByteArrayInputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import com.github.opendevl.JFlat;
+import com.mendix.logging.ILogNode;
+
+public class FlattenJsonToCsv extends CustomJavaAction<java.lang.Boolean>
+{
+	private java.lang.String jsonString;
+	private IMendixObject __csvOutput;
+	private system.proxies.FileDocument csvOutput;
+
+	public FlattenJsonToCsv(IContext context, java.lang.String jsonString, IMendixObject csvOutput)
+	{
+		super(context);
+		this.jsonString = jsonString;
+		this.__csvOutput = csvOutput;
+	}
+
+	@java.lang.Override
+	public java.lang.Boolean executeAction() throws Exception
+	{
+		this.csvOutput = this.__csvOutput == null ? null : system.proxies.FileDocument.initialize(getContext(), __csvOutput);
+
+		// BEGIN USER CODE
+
+	try {
+		// Flatten JSON
+        JFlat flatMe = new JFlat(jsonString);
+        flatMe.json2Sheet().headerSeparator("_").getJsonAsSheet();
+
+        // Output CSV
+        String csvFilePath = "temp.csv";
+        flatMe.write2csv(csvFilePath);
+
+        // Put contents in file
+        byte[] csvBytes = Files.readAllBytes(Paths.get(csvFilePath));
+        ByteArrayInputStream csvInputStream = new ByteArrayInputStream(csvBytes);
+        Core.storeFileDocumentContent(getContext(), this.csvOutput.getMendixObject(), csvInputStream);
+
+        // Delete temp file
+        Path tempFilePath = Paths.get(csvFilePath);
+        Files.delete(tempFilePath);
+
+        return true;
+
+        } catch (Exception e) {
+            LOGGER.warn("Failed to convert CSV file: " + e.getMessage(), e);
+            return false; // Operation failed
+        }
+
+		// END USER CODE
+	}
+
+	/**
+	 * Returns a string representation of this action
+	 * @return a string representation of this action
+	 */
+	@java.lang.Override
+	public java.lang.String toString()
+	{
+		return "FlattenJsonToCsv";
+	}
+
+	// BEGIN EXTRA CODE
+	private static final ILogNode LOGGER = Core.getLogger("JsonFlattener");
+	// END EXTRA CODE
+}