初始提交: UE5.3项目基础框架

Plugins/CesiumForUnreal/Source/ThirdParty/include/CesiumJsonReader/ExtensionsJsonHandler.h

@@ -0,0 +1,49 @@
+#pragma once
+
+#include "IExtensionJsonHandler.h"
+#include "JsonReaderOptions.h"
+#include "ObjectJsonHandler.h"
+
+#include <CesiumUtility/ExtensibleObject.h>
+
+#include <memory>
+
+namespace CesiumJsonReader {
+/**
+ * @brief \ref IJsonHandler for reading extensions, such as those listed in an
+ * \ref CesiumUtility::ExtensibleObject "ExtensibleObject".
+ */
+class ExtensionsJsonHandler : public CesiumJsonReader::ObjectJsonHandler {
+public:
+  /**
+   * @brief Creates a new \ref ExtensionsJsonHandler with the specified reader
+   * options.
+   *
+   * @param context Options to configure how the JSON is read.
+   */
+  explicit ExtensionsJsonHandler(const JsonReaderOptions& context) noexcept
+      : ObjectJsonHandler(),
+        _context(context),
+        _pObject(nullptr),
+        _currentExtensionHandler() {}
+
+  /**
+   * @brief Resets the \ref IJsonHandler's parent and pointer to destination, as
+   * well as the name of the object type that the extension is attached to.
+   */
+  void reset(
+      IJsonHandler* pParent,
+      CesiumUtility::ExtensibleObject* pObject,
+      const std::string& objectType);
+
+  /** @copydoc IJsonHandler::readObjectKey */
+  virtual IJsonHandler* readObjectKey(const std::string_view& str) override;
+
+private:
+  const JsonReaderOptions& _context;
+  CesiumUtility::ExtensibleObject* _pObject = nullptr;
+  std::string _objectType;
+  std::unique_ptr<IExtensionJsonHandler> _currentExtensionHandler;
+};
+
+} // namespace CesiumJsonReader