exercise 1 submission

- data pipeline for airports data extraction

.gitignore

@@ -1,3 +1,4 @@
 .DS_Store
 /data/*
-!/data/.gitkeep
+!/data/.gitkeep
+.vscode

exercises/exercise1.jv

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+// pipeline to dump airports data into sqlite
+pipeline AirportsPipeline {
+    AirportsExtractor 
+        -> AirportsFileInterpreter
+        -> AirportsCSVInterpreter 
+        -> NameHeaderWriter
+        -> AirportsTableInterpreter
+        -> AirportsLoader;
+
+    // Extract remote airports data (null -> file)
+    block AirportsExtractor oftype HttpExtractor {
+        url: "https://opendata.rhein-kreis-neuss.de/api/explore/v2.1/catalog/datasets/rhein-kreis-neuss-flughafen-weltweit/exports/csv?lang=en&timezone=Europe%2FBerlin&use_labels=true&delimiter=%3B";
+    }
+
+    // Interprete into text file (file -> text_file)
+    block AirportsFileInterpreter oftype TextFileInterpreter {
+    }
+
+    // Interprete into csv file (text_file -> csv_file)
+    block AirportsCSVInterpreter oftype CSVInterpreter {
+        delimiter: ";";
+    }
+
+    // Write Headers into table
+    block NameHeaderWriter oftype CellWriter {
+        at: range A1:A13;
+        write: ["Lfd. Nummer", "Name des Flughafens",	"Ort",	"Land",	"IATA",	"ICAO",	"Latitude",	"Longitude",	"Altitude",	"Zeitzone",	"DST",	"Zeitzonen-Datenbank",	"geo_punkt"];
+    }
+
+    // Define columns of table with datatypes
+    block AirportsTableInterpreter oftype TableInterpreter {
+        header: true;
+        columns: [
+            "Lfd. Nummer" oftype integer, 
+            "Name des Flughafens" oftype text,
+            "Ort" oftype text,	
+            "Land" oftype text,	
+            "IATA" oftype text,	
+            "ICAO" oftype text,	
+            "Latitude" oftype decimal,	
+            "Longitude" oftype decimal,	
+            "Altitude" oftype integer,	
+            "Zeitzone" oftype decimal,	
+            "DST" oftype text,	
+            "Zeitzonen-Datenbank" oftype text,	
+            "geo_punkt" oftype text
+        ];
+    }
+
+    // Extract into sqlite
+    block AirportsLoader oftype SQLiteLoader {
+        table: "airports";
+        file: "airports.sqlite";
+    }
+}