Class PluginManager

StegaPy/plugin_manager.py:28–71

插件管理器，负责系统内各类隐写和水印插件的注册、加载与生命周期管理。

class PluginManager:
    """插件管理器，负责系统内各类隐写和水印插件的注册、加载与生命周期管理。"""
    
    _plugins: Dict[str, StegaPyPlugin] = {}
    _initialized = False
    
    @classmethod
    def load_plugins(cls):
        """初始化并加载系统内置的所有算法插件。"""
        if cls._initialized:
            return
        
        # 注册内置插件
        cls._plugins['LSB'] = LSBPlugin()
        cls._plugins['RandomLSB'] = RandomLSBPlugin()
        cls._plugins['DWTDugad'] = DWTDugadPlugin()
        
        cls._initialized = True
    
    @classmethod
    def get_plugin_by_name(cls, name: str) -> Optional[StegaPyPlugin]:
        """根据指定的插件名称获取对应的插件实例。"""
        if not cls._initialized:
            cls.load_plugins()
        return cls._plugins.get(name)
    
    @classmethod
    def get_all_plugins(cls) -> List[StegaPyPlugin]:
        """获取当前系统已加载的所有插件列表。"""
        if not cls._initialized:
            cls.load_plugins()
        return list(cls._plugins.values())
    
    @classmethod
    def get_plugins_by_purpose(cls, purpose):
        """根据指定用途（如数据隐藏、数字水印）过滤并获取支持该功能的插件列表。"""
        if not cls._initialized:
            cls.load_plugins()
        
        result = []
        for plugin in cls._plugins.values():
            if purpose in plugin.get_purposes():
                result.append(plugin)
        return result