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diff --git a/src/data/compile.h b/src/data/compile.h
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+/*
+ * Copyright (c) 2003-2007, John Wiegley.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of New Artisans LLC nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _COMPILE_H
+#define _COMPILE_H
+
+#include "node.h"
+#include "journal.h"
+
+namespace ledger {
+namespace xml {
+
+void compile_node(node_t& node, xml::xpath_t::scope_t& scope);
+
+#if 0
+class commodity_node_t : public parent_node_t
+{
+public:
+  commodity_t * commodity;
+
+  commodity_node_t(document_t *    _document,
+		   commodity_t *   _commodity,
+		   parent_node_t * _parent = NULL)
+    : parent_node_t(_document, _parent), commodity(_commodity) {
+    TRACE_CTOR(commodity_node_t, "document_t *, commodity_t *, parent_node_t *");
+    set_name(document_t::COMMODITY);
+  }
+  virtual ~commodity_node_t() {
+    TRACE_DTOR(commodity_node_t);
+  }
+
+  virtual node_t * children() const;
+};
+
+class amount_node_t : public parent_node_t
+{
+public:
+  amount_t * amount;
+
+  amount_node_t(document_t *    _document,
+		amount_t *      _amount,
+		parent_node_t * _parent = NULL)
+    : parent_node_t(_document, _parent), amount(_amount) {
+    TRACE_CTOR(amount_node_t, "document_t *, amount_t *, parent_node_t *");
+    set_name(document_t::AMOUNT);
+  }
+  virtual ~amount_node_t() {
+    TRACE_DTOR(amount_node_t);
+  }
+
+  virtual node_t * children() const;
+
+  virtual value_t to_value() const {
+    return *amount;
+  }
+};
+#endif
+
+class journal_node_t : public parent_node_t
+{
+public:
+  shared_ptr<journal_t> journal;
+
+  journal_node_t(nameid_t    _name_id,
+		 document_t& _document,
+		 const optional<parent_node_t&>& _parent = none,
+		 journal_t * _journal = NULL)
+    : parent_node_t(_name_id, _document, _parent), journal(_journal) {
+    TRACE_CTOR(journal_node_t, "document_t *, journal_t *, parent_node_t *");
+  }
+  virtual ~journal_node_t() {
+    TRACE_DTOR(journal_node_t);
+  }
+
+  void compile(xpath_t::scope_t& scope);
+};
+
+class entry_node_t : public parent_node_t
+{
+public:
+  shared_ptr<entry_t> entry;
+
+  entry_node_t(nameid_t    _name_id,
+	       document_t& _document,
+	       const optional<parent_node_t&>& _parent = none,
+	       entry_t *   _entry = NULL)
+    : parent_node_t(_name_id, _document, _parent), entry(_entry) {
+    TRACE_CTOR(entry_node_t, "document_t&, parent_node_t, entry_t *");
+    assert(_name_id == ENTRY_NODE);
+  }
+  virtual ~entry_node_t() {
+    TRACE_DTOR(entry_node_t);
+  }
+
+  void compile(xpath_t::scope_t& scope);
+};
+
+class transaction_node_t : public parent_node_t
+{
+public:
+  shared_ptr<transaction_t> transaction;
+
+  transaction_node_t(nameid_t        _name_id,
+		     document_t&     _document,
+		     const optional<parent_node_t&>& _parent = none,
+		     transaction_t * _transaction = NULL)
+    : parent_node_t(_name_id, _document, _parent),
+      transaction(_transaction) {
+    TRACE_CTOR(transaction_node_t,
+	       "document_t&, parent_node_t, transaction_t *");
+    assert(_name_id == TRANSACTION_NODE);
+  }
+  virtual ~transaction_node_t() {
+    TRACE_DTOR(transaction_node_t);
+  }
+
+  void compile(xpath_t::scope_t& scope);
+
+private:
+  void parse_amount_expr(xpath_t::scope_t& scope,
+			 const char * amount_expr);
+};
+
+#if 0
+class account_node_t : public parent_node_t
+{
+  account_t * account;
+
+public:
+  account_node_t(document_t * _document, account_t * _account,
+		 parent_node_t * _parent = NULL)
+    : parent_node_t(_document, _parent), account(_account) {
+    TRACE_CTOR(account_node_t, "document_t *, account_t *, parent_node_t *");
+    set_name(document_t::ACCOUNT);
+  }
+  virtual ~account_node_t() {
+    TRACE_DTOR(account_node_t);
+  }
+
+  virtual node_t * children() const;
+};
+
+template <typename T>
+inline typename T::node_type *
+wrap_node(document_t * doc, T * item, void * parent_node = NULL) {
+  assert(false);
+  return NULL;
+}
+
+template <>
+inline transaction_t::node_type *
+wrap_node(document_t * doc, transaction_t * xact, void * parent_node) {
+  return new transaction_node_t(doc, xact, (parent_node_t *)parent_node);
+}
+
+template <>
+inline entry_t::node_type *
+wrap_node(document_t * doc, entry_t * entry, void * parent_node) {
+  return new entry_node_t(doc, entry, (parent_node_t *)parent_node);
+}
+
+template <>
+inline account_t::node_type *
+wrap_node(document_t * doc, account_t * account, void * parent_node) {
+  return new account_node_t(doc, account, (parent_node_t *)parent_node);
+}
+
+template <>
+inline journal_t::node_type *
+wrap_node(document_t * doc, journal_t * journal, void * parent_node) {
+  return new journal_node_t(doc, journal, (parent_node_t *)parent_node);
+}
+#endif
+
+} // namespace xml
+} // namespace ledger
+
+#endif // _COMPILE_H