[Java] Reduce scope of fields in codecs.

Author: mjpt777

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/java/JavaGenerator.java

@@ -2466,8 +2466,8 @@ private CharSequence generateFlyweightCode(
         final String semanticType = token.encoding().semanticType() == null ? "" : token.encoding().semanticType();
         final String actingFields = codecType == CodecType.ENCODER ?
             "" :
-            "    protected int actingBlockLength;\n" +
-            "    protected int actingVersion;\n";
+            "    int actingBlockLength;\n" +
+            "    int actingVersion;\n";
 
         return String.format(
             "    public static final %1$s BLOCK_LENGTH = %2$s;\n" +
@@ -2477,9 +2477,9 @@ private CharSequence generateFlyweightCode(
             "    public static final java.nio.ByteOrder BYTE_ORDER = java.nio.ByteOrder.%14$s;\n\n" +
             "    private final %9$s parentMessage = this;\n" +
             "    private %11$s buffer;\n" +
-            "    protected int initialOffset;\n" +
-            "    protected int offset;\n" +
-            "    protected int limit;\n" +
+            "    private int initialOffset;\n" +
+            "    private int offset;\n" +
+            "    private int limit;\n" +
             "%13$s" +
             "\n" +
             "    public %15$s sbeBlockLength()\n" +

sbe-tool/src/main/java/uk/co/real_logic/sbe/ir/generated/FrameCodecDecoder.java

@@ -18,11 +18,11 @@ public class FrameCodecDecoder
 
     private final FrameCodecDecoder parentMessage = this;
     private DirectBuffer buffer;
-    protected int initialOffset;
-    protected int offset;
-    protected int limit;
-    protected int actingBlockLength;
-    protected int actingVersion;
+    private int initialOffset;
+    private int offset;
+    private int limit;
+    int actingBlockLength;
+    int actingVersion;
 
     public int sbeBlockLength()
     {

sbe-tool/src/main/java/uk/co/real_logic/sbe/ir/generated/FrameCodecEncoder.java

@@ -18,9 +18,9 @@ public class FrameCodecEncoder
 
     private final FrameCodecEncoder parentMessage = this;
     private MutableDirectBuffer buffer;
-    protected int initialOffset;
-    protected int offset;
-    protected int limit;
+    private int initialOffset;
+    private int offset;
+    private int limit;
 
     public int sbeBlockLength()
     {

sbe-tool/src/main/java/uk/co/real_logic/sbe/ir/generated/TokenCodecDecoder.java

@@ -18,11 +18,11 @@ public class TokenCodecDecoder
 
     private final TokenCodecDecoder parentMessage = this;
     private DirectBuffer buffer;
-    protected int initialOffset;
-    protected int offset;
-    protected int limit;
-    protected int actingBlockLength;
-    protected int actingVersion;
+    private int initialOffset;
+    private int offset;
+    private int limit;
+    int actingBlockLength;
+    int actingVersion;
 
     public int sbeBlockLength()
     {

sbe-tool/src/main/java/uk/co/real_logic/sbe/ir/generated/TokenCodecEncoder.java

@@ -18,9 +18,9 @@ public class TokenCodecEncoder
 
     private final TokenCodecEncoder parentMessage = this;
     private MutableDirectBuffer buffer;
-    protected int initialOffset;
-    protected int offset;
-    protected int limit;
+    private int initialOffset;
+    private int offset;
+    private int limit;
 
     public int sbeBlockLength()
     {