/// <summary>
/// 卸载指定插件树节点对应的自定义对象。
/// </summary>
/// <param name="node">指定要卸载对象的挂靠节点。</param>
/// <returns>如果成功卸载则返回被卸载的对象，否则返回空(null)。</returns>
/// <exception cref="System.ArgumentNullException">当<paramref name="node"/>参数为空(null)。</exception>
/// <exception cref="System.ArgumentException">当<paramref name="node"/>参数的<see cref="Zongsoft.Plugins.PluginTreeNode.Tree"/>属性与当前插件树对象不是同一个引用。</exception>
/// <remarks>
/// <para>注意：当前该方法的实现是不完备的，请谨慎使用！</para>
/// <para>将<paramref name="node"/>参数指定的节点对象的Value属性置空，导致该节点类型成为路径节点(即空节点)。</para>
/// <para>如果<paramref name="node"/>参数指定的节点对象没有子节点了，则将该节点从插件树中删除，否则保留。</para>
/// </remarks>
public object Unmount(PluginTreeNode node)
{
if (node == null)
{
return(null);
}
if (!object.ReferenceEquals(node.Tree, this))
{
throw new ArgumentException();
}
//以永不构建的方式获取当前节点的目标对象
var value = node.UnwrapValue(ObtainMode.Never, null);
//将当前节点置空
node.Value = null;
//判断当前节点是否为叶子节点，如果是则将其删除
if (node.Children.Count == 0)
{
node.Remove();
}
//返回被卸载的目标对象
return(value);
}
public object GetValue(Type valueType, object defaultValue)
{
if (_valueNode == null)
{
return(PluginUtility.ResolveValue(_owner, _rawValue, _name, valueType, defaultValue));
}
var result = _valueNode.UnwrapValue(ObtainMode.Auto, _owner);
if (valueType != null)
{
result = Zongsoft.Common.Convert.ConvertValue(result, valueType, defaultValue);
}
return(result);
}
private void StopWorkers(PluginTreeNode node)
{
if (node == null)
{
return;
}
foreach (PluginTreeNode child in node.Children)
{
this.StopWorkers(child);
}
object target = node.UnwrapValue(ObtainMode.Never);
if (target is IWorker worker)
{
worker.Stop();
}
}
private void StartWorkers(PluginTreeNode node, string[] args)
{
if (node == null)
{
return;
}
object target = node.UnwrapValue(ObtainMode.Auto);
if (target is IWorker worker && worker.Enabled)
{
worker.Start(args);
}
foreach (PluginTreeNode child in node.Children)
{
this.StartWorkers(child, args);
}
}
