Merge pull request #14 from the-thing/message-class-header-fields

Generate header related methods in `Message` class.

Author: chrjohn

quickfixj-from-fix-orchestra-repository/quickfixj-from-fix-orchestra-generator/src/main/java/org/quickfixj/orchestra/CodeGeneratorJ.java

@@ -568,6 +568,7 @@ private static void generateMessageBaseClass(File outputDir, String version, Str
 			writeSerializationVersion(writer, SERIALIZATION_VERSION);
 			writeMessageNoArgBaseConstructor(writer, "Message");
 			writeProtectedMessageBaseConstructor(writer, "Message", getBeginString(version));
+            writeHeaderMethods(writer);
 			writeMessageDerivedHeaderClass(writer);
 
 			writeEndClassDeclaration(writer);
@@ -1096,6 +1097,27 @@ private static  Writer writeMessageCreateMethod(Writer writer, List<MessageType>
 		return writer;
 	}
 
+    private static void writeHeaderMethods(FileWriter writer) throws IOException {
+        writeHeaderFactoryMethod(writer);
+        writeHeaderGetter(writer);
+    }
+
+    private static void writeHeaderFactoryMethod(FileWriter writer) throws IOException {
+        writer.write(String.format("%n"));
+        writer.write(String.format("%s@Override%n", CodeGeneratorUtil.indent(1)));
+        writer.write(String.format("%sprotected Header newHeader() {%n", CodeGeneratorUtil.indent(1)));
+        writer.write(String.format("%sreturn new Header(this);%n", CodeGeneratorUtil.indent(2)));
+        writer.write(String.format("%s}%n", CodeGeneratorUtil.indent(1)));
+    }
+
+    private static void writeHeaderGetter(FileWriter writer) throws IOException {
+        writer.write(String.format("%n"));
+        writer.write(String.format("%s@Override%n", CodeGeneratorUtil.indent(1)));
+        writer.write(String.format("%spublic Header getHeader() {%n", CodeGeneratorUtil.indent(1)));
+        writer.write(String.format("%sreturn (Message.Header)header;%n", CodeGeneratorUtil.indent(2)));
+        writer.write(String.format("%s}%n", CodeGeneratorUtil.indent(1)));
+    }
+
 	private static Writer writeMessageDerivedHeaderClass(Writer writer) throws IOException {
 		writeStaticClassDeclaration(writer, "Header", "quickfix.Message.Header");
 		writeSerializationVersion(writer, SERIALIZATION_VERSION);