From 408b819c6e087593ba61e82b91dda2369ef32f62 Mon Sep 17 00:00:00 2001
From: John Wiegley <johnw@newartisans.com>
Date: Thu, 5 Feb 2009 21:18:37 -0400
Subject: Greatly simplified the way option and command handlers are defined.

---
 src/chain.h | 41 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 40 insertions(+), 1 deletion(-)

(limited to 'src/chain.h')

diff --git a/src/chain.h b/src/chain.h
index c9199f05..c6de088f 100644
--- a/src/chain.h
+++ b/src/chain.h
@@ -46,10 +46,49 @@
 #ifndef _CHAIN_H
 #define _CHAIN_H
 
-#include "report.h"
+#include "xact.h"
+#include "account.h"
 
 namespace ledger {
 
+/**
+ * @brief Brief
+ *
+ * Long.
+ */
+template <typename T>
+struct item_handler : public noncopyable
+{
+  shared_ptr<item_handler> handler;
+
+public:
+  item_handler() {
+    TRACE_CTOR(item_handler, "");
+  }
+  item_handler(shared_ptr<item_handler> _handler) : handler(_handler) {
+    TRACE_CTOR(item_handler, "shared_ptr<item_handler>");
+  }
+  virtual ~item_handler() {
+    TRACE_DTOR(item_handler);
+  }
+
+  virtual void flush() {
+    if (handler.get())
+      handler->flush();
+  }
+  virtual void operator()(T& item) {
+    if (handler.get()) {
+      check_for_signal();
+      (*handler.get())(item);
+    }
+  }
+};
+
+typedef shared_ptr<item_handler<xact_t> > xact_handler_ptr;
+typedef shared_ptr<item_handler<account_t> > acct_handler_ptr;
+
+class report_t;
+
 xact_handler_ptr
 chain_xact_handlers(report_t&	     report,
 		    xact_handler_ptr base_handler,
-- 
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