Add picojson example

CMakeLists.txt

@@ -237,6 +237,10 @@ if(valijson_BUILD_EXAMPLES)
         examples/json_pointers.cpp
     )
 
+    add_executable(picojson_format_test
+        examples/picojson_format_test.cpp
+    )
+
     add_executable(remote_resolution_local_file
         examples/remote_resolution_local_file.cpp
     )

examples/picojson_format_test.cpp

@@ -0,0 +1,85 @@
+#include <iostream>
+#include <string_view>
+
+#define PICOJSON_USE_INT64
+#include "picojson.h"
+
+#include "valijson/adapters/picojson_adapter.hpp"
+#include "valijson/validation_results.hpp"
+#include "valijson/schema_parser.hpp"
+#include "valijson/validator.hpp"
+
+constexpr auto schemaStr = R"JSON({
+  "additionalItems": false,
+  "items": [
+    {
+      "format": "date-time",
+      "type": "string"
+    },
+    {
+      "format": "date-time",
+      "type": "string"
+    }
+  ],
+  "maxItems": 2,
+  "minItems": 2,
+  "type": "array"
+})JSON";
+
+constexpr auto targetStr = R"JSON([
+    ["um 12", "um 12"],
+    ["2023-07-18T14:46:22Z"],
+    ["2023-07-18T14:46:22Z", "2023-07-18T14:46:22Z", "2023-07-18T14:46:22Z", "2023-07-18T14:46:22Z"]
+])JSON";
+
+picojson::value Parse(std::string_view serialized, picojson::value def)
+{
+    picojson::value v;
+    auto first = serialized.data();
+    auto last = first + serialized.size();
+    auto err = picojson::parse(v, first, last);
+
+    if (!err.empty()) {
+        return def;
+    }
+
+    return v;
+}
+
+int main(int argc, char **argv)
+{
+    auto validatorSchema = std::make_shared<valijson::Schema>();
+    {
+        auto schemaJson = Parse(schemaStr, picojson::value{});
+        auto schemaAdapter = valijson::adapters::PicoJsonAdapter(schemaJson);
+        valijson::SchemaParser parser;
+        parser.populateSchema(schemaAdapter, *validatorSchema);
+        std::cout << "Schema:" << std::endl << schemaStr << std::endl;
+    }
+
+    auto targetJson = Parse(targetStr, picojson::value{});
+    auto targetAdapter = valijson::adapters::PicoJsonAdapter(targetJson);
+    std::cout << "Target:" << std::endl << targetStr << std::endl;
+
+    valijson::ValidationResults results;
+    auto validator = valijson::Validator();
+    [[maybe_unused]] auto isValid = validator.validate(
+        *validatorSchema,
+        targetAdapter,
+        &results);
+
+    std::cout << "Is valid: " << (isValid ? "YES" : "NO") << std::endl;
+
+    valijson::ValidationResults::Error error;
+    unsigned int errorNum = 1;
+    while (results.popError(error)) {
+        std::cerr << "Error #" << errorNum << std::endl;
+        std::cerr << "  ";
+        for (const std::string &contextElement : error.context) {
+            std::cerr << contextElement << " ";
+        }
+        std::cerr << std::endl;
+        std::cerr << "    - " << error.description << std::endl;
+        ++errorNum;
+    }
+}