Data update

Task/Nested-templated-data/Java/nested-templated-data.java

@@ -0,0 +1,61 @@
+import java.util.List;
+import java.util.Set;
+import java.util.TreeSet;
+import java.util.stream.IntStream;
+
+public final class NestedTemplateData {
+
+	public static void main(String[] args) {
+		List<String> payloads = IntStream.rangeClosed(0, 6).mapToObj( i -> "Payload#" + i ).toList();
+		String template = "[1, [[[1, 6]], [[3, 4, [17], 0], 5], 3], 9, [888], 9]";
+		
+		System.out.println("Level        Element");
+		processPayloads(template, payloads);
+	}
+	
+	private static void processPayloads(String template, List<String> payloads) {
+		Set<String> unusedPayloads = new TreeSet<String>(payloads);
+		Set<String> missingPayloads = new TreeSet<String>();
+		int level = 0;
+		boolean levelChanged = false;
+		
+		for ( int i = 0; i < template.length(); i++ ) {	
+			String item = template.substring(i, i + 1);			
+			switch ( item ) {
+				case "[" -> { level += 1; levelChanged = true; }
+				case "]" -> { level -= 1; levelChanged = true; }
+				default -> {
+					if ( isDigit(item) ) {
+						while ( isDigit(template.substring(i + 1, i + 2)) ) {
+							item += template.substring(i + 1, i + 2);
+							i += 1;
+						}						
+						if ( levelChanged ) {
+							System.out.println();
+							System.out.print(String.format("%2s%s", level, "    ".repeat(level)));
+							levelChanged = false;
+						}
+						String payload = "Payload#" + item;
+						if ( payloads.contains(payload) ) {
+							unusedPayloads.remove(payload);
+						} else {					
+							missingPayloads.add(payload);
+							payload += " UNDEFINED";
+						}
+						System.out.print(payload + " ");
+					}
+				}
+			}
+		}
+		
+		System.out.println(System.lineSeparator());
+		System.out.println(" Unused payloads: " + unusedPayloads);
+		System.out.println();
+		System.out.println(" Missing payloads: " + missingPayloads);
+	}
+
+	private static boolean isDigit(String item) {
+		return item.compareTo("0") >= 0 && item.compareTo("9") <= 0;
+	}
+
+}