From 1d055261b4144dbf86b2658437015b15d4dd9bff Mon Sep 17 00:00:00 2001
From: Richard <q@1bpm.net>
Date: Sun, 4 Sep 2022 00:32:56 +0100
Subject: initial

---
 include/jsoncons/json_filter.hpp | 653 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 653 insertions(+)
 create mode 100644 include/jsoncons/json_filter.hpp

(limited to 'include/jsoncons/json_filter.hpp')

diff --git a/include/jsoncons/json_filter.hpp b/include/jsoncons/json_filter.hpp
new file mode 100644
index 0000000..cc93c73
--- /dev/null
+++ b/include/jsoncons/json_filter.hpp
@@ -0,0 +1,653 @@
+// Copyright 2013 Daniel Parker
+// Distributed under the Boost license, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// See https://github.com/danielaparker/jsoncons for latest version
+
+#ifndef JSONCONS_JSON_FILTER_HPP
+#define JSONCONS_JSON_FILTER_HPP
+
+#include <string>
+
+#include <jsoncons/json_visitor.hpp>
+
+namespace jsoncons {
+
+template <class CharT>
+class basic_json_filter : public basic_json_visitor<CharT>
+{
+public:
+    using typename basic_json_visitor<CharT>::char_type;
+    using typename basic_json_visitor<CharT>::string_view_type;
+private:
+    basic_json_visitor<char_type>* destination_;
+
+    // noncopyable 
+    basic_json_filter(const basic_json_filter&) = delete;
+    basic_json_filter& operator=(const basic_json_filter&) = delete;
+public:
+    basic_json_filter(basic_json_visitor<char_type>& visitor)
+        : destination_(std::addressof(visitor))
+    {
+    }
+
+    // moveable
+    basic_json_filter(basic_json_filter&&) = default;
+    basic_json_filter& operator=(basic_json_filter&&) = default;
+
+    basic_json_visitor<char_type>& destination()
+    {
+        return *destination_;
+    }
+
+#if !defined(JSONCONS_NO_DEPRECATED)
+
+    JSONCONS_DEPRECATED_MSG("Instead, use destination()")
+    basic_json_visitor<char_type>& to_handler()
+    {
+        return destination_;
+    }
+    JSONCONS_DEPRECATED_MSG("Instead, use destination") 
+    basic_json_visitor<char_type>& input_handler()
+    {
+        return destination_;
+    }
+
+    JSONCONS_DEPRECATED_MSG("Instead, use destination") 
+    basic_json_visitor<char_type>& downstream_handler()
+    {
+        return destination_;
+    }
+
+    JSONCONS_DEPRECATED_MSG("Instead, use destination") 
+    basic_json_visitor<char_type>& destination_handler()
+    {
+        return destination_;
+    }
+#endif
+
+private:
+    void visit_flush() override
+    {
+        destination_->flush();
+    }
+
+    bool visit_begin_object(semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->begin_object(tag, context, ec);
+    }
+
+    bool visit_begin_object(std::size_t length, semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->begin_object(length, tag, context, ec);
+    }
+
+    bool visit_end_object(const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->end_object(context, ec);
+    }
+
+    bool visit_begin_array(semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->begin_array(tag, context, ec);
+    }
+
+    bool visit_begin_array(std::size_t length, semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->begin_array(length, tag, context, ec);
+    }
+
+    bool visit_end_array(const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->end_array(context, ec);
+    }
+
+    bool visit_key(const string_view_type& name,
+                 const ser_context& context,
+                 std::error_code& ec) override
+    {
+        return destination_->key(name, context, ec);
+    }
+
+    bool visit_string(const string_view_type& value,
+                      semantic_tag tag,
+                      const ser_context& context,
+                      std::error_code& ec) override
+    {
+        return destination_->string_value(value, tag, context, ec);
+    }
+
+    bool visit_byte_string(const byte_string_view& b, 
+                           semantic_tag tag,
+                           const ser_context& context,
+                           std::error_code& ec) override
+    {
+        return destination_->byte_string_value(b, tag, context, ec);
+    }
+
+    bool visit_byte_string(const byte_string_view& b, 
+                           uint64_t ext_tag,
+                           const ser_context& context,
+                           std::error_code& ec) override
+    {
+        return destination_->byte_string_value(b, ext_tag, context, ec);
+    }
+
+    bool visit_uint64(uint64_t value, semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->uint64_value(value, tag, context, ec);
+    }
+
+    bool visit_int64(int64_t value, semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->int64_value(value, tag, context, ec);
+    }
+
+    bool visit_half(uint16_t value, semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->half_value(value, tag, context, ec);
+    }
+
+    bool visit_double(double value, semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->double_value(value, tag, context, ec);
+    }
+
+    bool visit_bool(bool value, semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->bool_value(value, tag, context, ec);
+    }
+
+    bool visit_null(semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->null_value(tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const uint8_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const uint16_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const uint32_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const uint64_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const int8_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const int16_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const int32_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const int64_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(half_arg_t, 
+                        const jsoncons::span<const uint16_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(half_arg, s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const float>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const double>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_begin_multi_dim(const jsoncons::span<const size_t>& shape,
+                            semantic_tag tag,
+                            const ser_context& context, 
+                            std::error_code& ec) override
+    {
+        return destination_->begin_multi_dim(shape, tag, context, ec);
+    }
+
+    bool visit_end_multi_dim(const ser_context& context,
+                          std::error_code& ec) override
+    {
+        return destination_->end_multi_dim(context, ec);
+    }
+};
+
+template <class CharT>
+class basic_rename_object_key_filter : public basic_json_filter<CharT>
+{
+public:
+    using typename basic_json_filter<CharT>::string_view_type;
+
+private:
+    std::basic_string<CharT> name_;
+    std::basic_string<CharT> new_name_;
+public:
+    basic_rename_object_key_filter(const std::basic_string<CharT>& name,
+                             const std::basic_string<CharT>& new_name,
+                             basic_json_visitor<CharT>& visitor)
+        : basic_json_filter<CharT>(visitor), 
+          name_(name), new_name_(new_name)
+    {
+    }
+
+private:
+    bool visit_key(const string_view_type& name,
+                 const ser_context& context,
+                 std::error_code& ec) override
+    {
+        if (name == name_)
+        {
+            return this->destination().key(new_name_,context, ec);
+        }
+        else
+        {
+            return this->destination().key(name,context,ec);
+        }
+    }
+};
+
+template <class From,class To>
+class json_visitor_adaptor_base : public From
+{
+public:
+    using typename From::string_view_type;
+private:
+    To* destination_;
+
+    // noncopyable
+    json_visitor_adaptor_base(const json_visitor_adaptor_base&) = delete;
+    json_visitor_adaptor_base& operator=(const json_visitor_adaptor_base&) = delete;
+public:
+    json_visitor_adaptor_base(To& visitor)
+        : destination_(std::addressof(visitor))
+    {
+    }
+
+    // moveable
+    json_visitor_adaptor_base(json_visitor_adaptor_base&&) = default;
+    json_visitor_adaptor_base& operator=(json_visitor_adaptor_base&&) = default;
+
+    To& destination()
+    {
+        return *destination_;
+    }
+
+private:
+    void visit_flush() override
+    {
+        destination_->flush();
+    }
+
+    bool visit_begin_object(semantic_tag tag, 
+                         const ser_context& context,
+                         std::error_code& ec) override
+    {
+        return destination_->begin_object(tag, context, ec);
+    }
+
+    bool visit_begin_object(std::size_t length, 
+                         semantic_tag tag, 
+                         const ser_context& context,
+                         std::error_code& ec) override
+    {
+        return destination_->begin_object(length, tag, context, ec);
+    }
+
+    bool visit_end_object(const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->end_object(context, ec);
+    }
+
+    bool visit_begin_array(semantic_tag tag, 
+                        const ser_context& context,
+                        std::error_code& ec) override
+    {
+        return destination_->begin_array(tag, context, ec);
+    }
+
+    bool visit_begin_array(std::size_t length, 
+                        semantic_tag tag, 
+                        const ser_context& context,
+                        std::error_code& ec) override
+    {
+        return destination_->begin_array(length, tag, context, ec);
+    }
+
+    bool visit_end_array(const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->end_array(context, ec);
+    }
+
+    bool visit_byte_string(const byte_string_view& b, 
+                           semantic_tag tag,
+                           const ser_context& context,
+                           std::error_code& ec) override
+    {
+        return destination_->byte_string_value(b, tag, context, ec);
+    }
+
+    bool visit_byte_string(const byte_string_view& b, 
+                           uint64_t ext_tag,
+                           const ser_context& context,
+                           std::error_code& ec) override
+    {
+        return destination_->byte_string_value(b, ext_tag, context, ec);
+    }
+
+    bool visit_half(uint16_t value, semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->half_value(value, tag, context, ec);
+    }
+
+    bool visit_double(double value, semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->double_value(value, tag, context, ec);
+    }
+
+    bool visit_int64(int64_t value, semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->int64_value(value, tag, context, ec);
+    }
+
+    bool visit_uint64(uint64_t value, semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->uint64_value(value, tag, context, ec);
+    }
+
+    bool visit_bool(bool value, semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->bool_value(value, tag, context, ec);
+    }
+
+    bool visit_null(semantic_tag tag, const ser_context& context, std::error_code& ec) override
+    {
+        return destination_->null_value(tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const uint8_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const uint16_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const uint32_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const uint64_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const int8_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const int16_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const int32_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const int64_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(half_arg_t, 
+                        const jsoncons::span<const uint16_t>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(half_arg, s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const float>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_typed_array(const jsoncons::span<const double>& s, 
+                        semantic_tag tag,
+                        const ser_context& context, 
+                        std::error_code& ec) override
+    {
+        return destination_->typed_array(s, tag, context, ec);
+    }
+
+    bool visit_begin_multi_dim(const jsoncons::span<const size_t>& shape,
+                            semantic_tag tag,
+                            const ser_context& context, 
+                            std::error_code& ec) override
+    {
+        return destination_->begin_multi_dim(shape, tag, context, ec);
+    }
+
+    bool visit_end_multi_dim(const ser_context& context,
+                          std::error_code& ec) override
+    {
+        return destination_->end_multi_dim(context, ec);
+    }
+
+};
+
+template <class From,class To,class Enable=void>
+class json_visitor_adaptor 
+{
+};
+
+template <class From,class To>
+class json_visitor_adaptor<From,To,typename std::enable_if<type_traits::is_narrow_character<typename From::char_type>::value &&
+                                                           type_traits::is_narrow_character<typename To::char_type>::value>::type> : public json_visitor_adaptor_base<From,To>
+{
+    using supertype = json_visitor_adaptor_base<From,To>;
+    using to_char_type = typename To::char_type;
+    using from_char_type = typename From::char_type;
+public:
+    using typename From::string_view_type;
+    using supertype::destination;
+private:
+
+    // noncopyable
+    json_visitor_adaptor(const json_visitor_adaptor&) = delete;
+    json_visitor_adaptor& operator=(const json_visitor_adaptor&) = delete;
+public:
+    json_visitor_adaptor(To& visitor)
+        : supertype(visitor)
+    {
+    }
+
+    // moveable
+    json_visitor_adaptor(json_visitor_adaptor&&) = default;
+    json_visitor_adaptor& operator=(json_visitor_adaptor&&) = default;
+
+private:
+
+    bool visit_key(const string_view_type& key,
+                 const ser_context& context,
+                 std::error_code& ec) override
+    {
+        return destination().key(string_view_type(reinterpret_cast<const to_char_type*>(key.data()),key.size()), context, ec);
+    }
+
+    bool visit_string(const string_view_type& value,
+                      semantic_tag tag,
+                      const ser_context& context,
+                      std::error_code& ec) override
+    {
+        return destination().string_value(string_view_type(reinterpret_cast<const to_char_type*>(value.data()),value.size()), tag, context, ec);
+    }
+};
+
+template <class From,class To>
+class json_visitor_adaptor<From,To,typename std::enable_if<!(type_traits::is_narrow_character<typename From::char_type>::value &&
+                                                             type_traits::is_narrow_character<typename To::char_type>::value)>::type> : public json_visitor_adaptor_base<From,To>
+{
+    using supertype = json_visitor_adaptor_base<From,To>;
+public:
+    using typename From::string_view_type;
+    using supertype::destination;
+private:
+
+    // noncopyable
+    json_visitor_adaptor(const json_visitor_adaptor&) = delete;
+    json_visitor_adaptor& operator=(const json_visitor_adaptor&) = delete;
+public:
+    json_visitor_adaptor(To& visitor)
+        : supertype(visitor)
+    {
+    }
+
+    // moveable
+    json_visitor_adaptor(json_visitor_adaptor&&) = default;
+    json_visitor_adaptor& operator=(json_visitor_adaptor&&) = default;
+
+private:
+
+    bool visit_key(const string_view_type& name,
+                 const ser_context& context,
+                 std::error_code& ec) override
+    {
+        std::basic_string<typename To::char_type> target;
+        auto result = unicode_traits::convert(name.data(), name.size(), target, unicode_traits::conv_flags::strict);
+        if (result.ec != unicode_traits::conv_errc())
+        {
+            ec = result.ec;
+        }
+        return destination().key(target, context, ec);
+    }
+
+    bool visit_string(const string_view_type& value,
+                      semantic_tag tag,
+                      const ser_context& context,
+                      std::error_code& ec) override
+    {
+        std::basic_string<typename To::char_type> target;
+        auto result = unicode_traits::convert(value.data(), value.size(),
+                                              target,unicode_traits::conv_flags::strict);
+        if (result.ec != unicode_traits::conv_errc())
+        {
+            JSONCONS_THROW(ser_error(result.ec));
+        }
+        return destination().string_value(target, tag, context, ec);
+    }
+};
+
+template <class From,class To>
+json_visitor_adaptor<From,To> make_json_visitor_adaptor(To& to)
+{
+    return json_visitor_adaptor<From, To>(to);
+}
+
+using json_filter = basic_json_filter<char>;
+using wjson_filter = basic_json_filter<wchar_t>;
+using rename_object_key_filter = basic_rename_object_key_filter<char>;
+using wrename_object_key_filter = basic_rename_object_key_filter<wchar_t>;
+
+#if !defined(JSONCONS_NO_DEPRECATED)
+template <class CharT>
+using basic_json_content_filter = basic_json_filter<CharT>;
+JSONCONS_DEPRECATED_MSG("Instead, use json_filter") typedef basic_json_filter<char> json_content_filter;
+JSONCONS_DEPRECATED_MSG("Instead, use wjson_filter") typedef basic_json_filter<wchar_t> wjson_content_filter;
+JSONCONS_DEPRECATED_MSG("Instead, use rename_object_key_filter") typedef basic_rename_object_key_filter<char> rename_name_filter;
+JSONCONS_DEPRECATED_MSG("Instead, use wrename_object_key_filter") typedef basic_rename_object_key_filter<wchar_t> wrename_name_filter;
+JSONCONS_DEPRECATED_MSG("Instead, use rename_object_key_filter") typedef basic_rename_object_key_filter<char> rename_object_member_filter;
+JSONCONS_DEPRECATED_MSG("Instead, use wrename_object_key_filter") typedef basic_rename_object_key_filter<wchar_t> wrename_object_member_filter;
+#endif
+
+}
+
+#endif
-- 
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