Cleanup to parser

src/main/java/me/legrange/mikrotik/impl/Parser.java

@@ -3,21 +3,27 @@ package me.legrange.mikrotik.impl;
 import java.util.Arrays;
 import java.util.LinkedList;
 import java.util.List;
+
 import me.legrange.mikrotik.impl.Scanner.Token;
 
 /**
  * Parse the pseudo-command line into command objects.
+ *
  * @author GideonLeGrange
  */
 class Parser {
 
-    /** parse the given bit of text into a Command object */
+    /**
+     * parse the given bit of text into a Command object
+     */
     static Command parse(String text) throws ParseException {
         Parser parser = new Parser(text);
         return parser.parse();
     }
 
-    /** run parse on the internal data and return the command object */
+    /**
+     * run parse on the internal data and return the command object
+     */
     private Command parse() throws ParseException {
         command();
         while (!is(Token.WHERE, Token.RETURN, Token.EOL)) {
@@ -67,8 +73,7 @@ class Parser {
                 next();
             }
             cmd.addParameter(new Parameter(name, val.toString()));
-        }
-        else {
+        } else {
             cmd.addParameter(new Parameter(name));
         }
     }
@@ -106,23 +111,29 @@ class Parser {
                 }
             }
             break;
-            case LEFT_BRACKET : {
-                next();
-                expr();
-                expect(Token.RIGHT_BRACKET);
-                next();
-            }
+            case LEFT_BRACKET:
+                nestedExpr();
                 break;
         }
         // if you get here, you had a expression, see if you want more. 
         switch (token) {
-            case AND : andExpr();
+            case AND:
+                andExpr();
                 break;
-            case OR : orExpr();
+            case OR:
+                orExpr();
                 break;
         }
     }
 
+    private void nestedExpr() throws ParseException {
+        expect(Token.LEFT_BRACKET);
+        next();
+        expr();
+        expect(Token.RIGHT_BRACKET);
+        next();
+    }
+
     private void andExpr() throws ParseException {
         next(); // eat and
         expr();
@@ -197,7 +208,9 @@ class Parser {
         return false;
     }
 
-    /** move to the next token returned by the scanner */
+    /**
+     * move to the next token returned by the scanner
+     */
     private void next() throws ScanException {
         token = scanner.next();
         while (token == Token.WS) {