Minor tweaks to reduce complexity

Author: headius

java/src/json/ext/Generator.java

@@ -390,14 +390,11 @@ private static void generateArray(ThreadContext context, Session session, RubyAr
 
         buffer.write('[');
         buffer.write(arrayNLBytes, arrayNLBegin, arrayNLSize);
-        boolean firstItem = true;
 
         int length = object.getLength();
-        for (int i = 0, t = length; i < t; i++) {
+        for (int i = 0; i < length; i++) {
             IRubyObject element = object.eltInternal(i);
-            if (firstItem) {
-                firstItem = false;
-            } else {
+            if (i > 0) {
                 buffer.write(',');
                 if (!arrayNLEmpty) {
                     buffer.write(arrayNLBytes, arrayNLBegin, arrayNLSize);
@@ -407,10 +404,10 @@ private static void generateArray(ThreadContext context, Session session, RubyAr
             generateFor(context, session, element, buffer);
         }
 
-        state.decreaseDepth();
+        int oldDepth = state.decreaseDepth();
         if (!arrayNLEmpty) {
             buffer.write(arrayNLBytes, arrayNLBegin, arrayNLSize);
-            Utils.repeatWrite(buffer, indentUnit, state.getDepth());
+            Utils.repeatWrite(buffer, indentUnit, oldDepth);
         }
 
         buffer.write((byte) ']');
@@ -451,19 +448,19 @@ private static void generateHash(ThreadContext context, Session session, RubyHas
         final ByteList spaceBefore = state.getSpaceBefore();
         final ByteList space = state.getSpace();
 
-        buffer.write((byte)'{');
+        buffer.write('{');
         buffer.write(objectNLBytes);
 
         boolean firstPair = true;
         for (RubyHash.RubyHashEntry entry : (Set<RubyHash.RubyHashEntry>) object.directEntrySet()) {
             processEntry(context, session, buffer, entry, firstPair, objectNl, indent, spaceBefore, space);
             firstPair = false;
         }
-        state.decreaseDepth();
+        int oldDepth = state.decreaseDepth();
         if (!firstPair && !objectNl.isEmpty()) {
             buffer.write(objectNLBytes);
         }
-        buffer.write(Utils.repeat(state.getIndent(), state.getDepth()));
+        Utils.repeatWrite(buffer, state.getIndent(), oldDepth);
         buffer.write((byte)'}');
     }
 

java/src/json/ext/GeneratorState.java

@@ -536,8 +536,8 @@ public int increaseDepth(ThreadContext context) {
         return depth;
     }
 
-    public void decreaseDepth() {
-        --depth;
+    public int decreaseDepth() {
+        return --depth;
     }
 
     /**