[Java] Added sinceVersion metadata accessor methods to generated decoders.

Author: mjpt777

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

@@ -572,6 +572,15 @@ private static CharSequence generateGroupDecoderProperty(final String groupName,
  formatPropertyName(groupName),
  token.id()));
 
+ sb.append(String.format(
+ "\n" +
+ indent + " public static int %sSinceVersion()\n" +
+ indent + " {\n" +
+ indent + " return %d;\n" +
+ indent + " }\n",
+ formatPropertyName(groupName),
+ token.version()));
+
  sb.append(String.format(
  "\n" +
  indent + " public %1$s %2$s()\n" +
@@ -633,6 +642,8 @@ private CharSequence generateDecoderVarData(final List<Token> tokens, final Stri
  }
 
  generateFieldIdMethod(sb, token, indent);
+ generateFieldSinceVersionMethod(sb, token, indent);
+
  final String characterEncoding = tokens.get(i + 3).encoding().characterEncoding();
  generateCharacterEncodingMethod(sb, token.name(), characterEncoding, indent);
  generateFieldMetaAttributeMethod(sb, token, indent);
@@ -1946,6 +1957,7 @@ private CharSequence generateDecoderFields(final List<Token> tokens, final Strin
  final String typeName = decoderName(formatClassName(typeToken.name()));
 
  generateFieldIdMethod(sb, fieldToken, indent);
+ generateFieldSinceVersionMethod(sb, fieldToken, indent);
  generateFieldMetaAttributeMethod(sb, fieldToken, indent);
 
  switch (typeToken.signal())
@@ -2001,6 +2013,18 @@ private static void generateFieldIdMethod(final StringBuilder sb, final Token to
  token.id()));
  }
 
+ private static void generateFieldSinceVersionMethod(final StringBuilder sb, final Token token, final String indent)
+ {
+ sb.append(String.format(
+ "\n" +
+ indent + " public static int %sSinceVersion()\n" +
+ indent + " {\n" +
+ indent + " return %d;\n" +
+ indent + " }\n",
+ formatPropertyName(token.name()),
+ token.version()));
+ }
+
  private static void generateFieldMetaAttributeMethod(final StringBuilder sb, final Token token, final String indent)
  {
  final Encoding encoding = token.encoding();