Standalone executable main method for processing import descriptors

histream-import/src/main/java/de/sekmi/histream/etl/XMLExport.java

+package de.sekmi.histream.etl;
+
+import java.nio.file.Paths;
+
+
+import de.sekmi.histream.impl.Meta;
+import de.sekmi.histream.io.GroupedXMLWriter;
+import de.sekmi.histream.io.Streams;
+
+/**
+ * 
+ * Read and process a specified import descriptor and output the HIStream XML format
+ * 
+ * @author R.W.Majeed
+ *
+ */
+public class XMLExport {
+
+	/**
+	 * Read and process a specified import descriptor and output the HIStream XML format
+	 * @param args single argument with file name
+	 * @throws Exception error
+	 */
+	public static void main(String[] args) throws Exception{
+		if( args.length != 1 ){
+			System.err.println("Usage: XMLExport <import-descriptor-file>");
+			System.exit(-1);
+		}
+		ETLObservationSupplier suppl = ETLObservationSupplier.load(Paths.get(args[0]).toUri().toURL());
+		GroupedXMLWriter writer = new GroupedXMLWriter(System.out);
+		Meta.transfer(suppl, writer);
+		Streams.transfer(suppl, writer);
+		suppl.close();
+		writer.close();
+	}
+}