Add property to set repeating group delimiter from first tag in group. Add configuration setting and documentation

Author: andreydp

quickfixj-core/src/main/doc/usermanual/usage/configuration.html

@@ -464,6 +464,14 @@ <H3>QuickFIX Settings</H3>
     <TD> Y<br>N</TD>
     <TD> Y </TD>
   </TR>
+  <TR ALIGN="left" VALIGN="middle">
+      <TD><I>FirstFieldInGroupIsDelimiter</I></TD>
+      <TD>Session validation setting for enabling whether first found field in repeating group will be used as
+          delimiter. Values are "Y" or "N". Default is "N".</TD>
+      <TD>Y<br>
+          N</TD>
+      <TD>N</TD>
+  </TR>
 
   <TR ALIGN="center" VALIGN="middle">
     <TD COLSPAN="4" class="subsection"><A NAME="Initiator">Initiator</A></TD>

quickfixj-core/src/main/java/quickfix/DefaultSessionFactory.java

@@ -309,6 +309,11 @@ private DataDictionary createDataDictionary(SessionID sessionID, SessionSettings
                     Session.SETTING_ALLOW_UNKNOWN_MSG_FIELDS));
         }
 
+        if (settings.isSetting(sessionID, Session.SETTING_FIRST_FIELD_IN_GROUP_IS_DELIMITER)) {
+            dataDictionary.setCheckUnorderedGroupFields(settings.getBool(sessionID,
+                    Session.SETTING_FIRST_FIELD_IN_GROUP_IS_DELIMITER));
+        }
+
         return dataDictionary;
     }
 

quickfixj-core/src/main/java/quickfix/Session.java

@@ -376,6 +376,12 @@ public class Session implements Closeable {
      */
     public static final String SETTING_RESEND_REQUEST_CHUNK_SIZE = "ResendRequestChunkSize";
 
+    /**
+     * Session validation setting for enabling whether first found field in repeating group will be used as
+     * delimiter. Values are "Y" or "N". Default is "N".
+     */
+    public static final String SETTING_FIRST_FIELD_IN_GROUP_IS_DELIMITER = "FirstFieldInGroupIsDelimiter";
+
     public static final String SETTING_MAX_SCHEDULED_WRITE_REQUESTS = "MaxScheduledWriteRequests";
 
     public static final String SETTING_VALIDATE_CHECKSUM = "ValidateChecksum";