"dual-client" mode is mutually exclusive with HEART mode, HEART mode takes precedence

Author: jricher

openid-connect-common/src/main/java/org/mitre/openid/connect/config/ConfigurationPropertiesBean.java

@@ -201,7 +201,11 @@ public void setLanguageNamespaces(List<String> languageNamespaces) {
      * @return true if dual client is configured, otherwise false
      */
     public boolean isDualClient() {
-        return dualClient;
+    	if (isHeartMode()) {
+    		return false; // HEART mode is incompatible with dual client mode
+    	} else {
+    		return dualClient;
+    	}
     }
 
     /**
@@ -212,7 +216,7 @@ public void setDualClient(boolean dualClient) {
     }
 
     /**
-     * Get the list of namespaces as a JSON string
+     * Get the list of namespaces as a JSON string, for injection into the JavaScript UI
      * @return
      */
     public String getLanguageNamespacesString() {