Initial data commit

Task/Read-a-configuration-file/Java/read-a-configuration-file-2.java

@@ -0,0 +1,41 @@
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+
+public class ConfigReader {
+    private static final Pattern LINE_PATTERN = Pattern.compile("([^ =]+)[ =]?(.*)");
+
+    public static void main(final String[] args) throws IOException {
+        System.out.println(parseFile(args[0]));
+    }
+
+    public static Map<String, Object> parseFile(final String fileName) throws IOException {
+        final Map<String, Object> result = new HashMap<>();
+        result.put("needspeeling", false);
+        result.put("seedsremoved", false);
+        try (BufferedReader reader = new BufferedReader(new FileReader(fileName))) {
+            result.putAll(reader.lines()
+                .filter(line -> !"".equals(line.trim()) && !line.startsWith("#") && !line.startsWith(";"))
+                .map(LINE_PATTERN::matcher)
+                .filter(Matcher::matches)
+                .collect(Collectors.toMap(matcher -> matcher.group(1).trim().toLowerCase(), matcher -> {
+                    final String value = matcher.group(2).trim();
+                    if ("".equals(value)) {
+                        return true;
+                    } else if (-1 == value.indexOf(',')) {
+                        return value;
+                    }
+                    return Arrays.asList(value.split(",")).stream().map(String::trim).collect(Collectors.toList());
+                }))
+            );
+        }
+
+        return result;
+    }
+}