Merge pull request aeron-io#731 from ariksher-nex/feature/gen-display-no-alloc

[Java] Avoid memory allocation at varDataDisplay

Author: mjpt777

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

@@ -3269,7 +3269,16 @@ private void appendDecoderDisplay(
  }
  else
  {
- append(sb, indent, "builder.append('\\'').append(" + varDataName + "()).append('\\'');");
+ if (characterEncoding.contains("ASCII"))
+ {
+ append(sb, indent, "builder.append('\\'');");
+ append(sb, indent, formatGetterName(varDataToken.name()) + "(builder);");
+ append(sb, indent, "builder.append('\\'');");
+ }
+ else
+ {
+ append(sb, indent, "builder.append('\\'').append(" + varDataName + "()).append('\\'');");
+ }
  }
 
  lengthBeforeLastGeneratedSeparator = sb.length();

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

@@ -158,6 +158,18 @@ public static String formatPropertyName(final String value)
  return formattedValue;
  }
 
+ /**
+ * Format a Getter name for generated code.
+ * <p>
+ *
+ * @param value to be formatted.
+ * @return the string formatted as a getter name.
+ */
+ public static String formatGetterName(final String value)
+ {
+ return "get" + Generators.toUpperFirstChar(value);
+ }
+
  /**
  * Format a class name for the generated code.
  *