# Class ProcessInstanceTreeItem

OptimaJet.Workflow.Core.Entities.ProcessInstanceTreeItem

Represents persisted process instance data used to reconstruct a [ProcessInstancesTree](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Subprocess/ProcessInstancesTree/) hierarchy.

Namespace: [OptimaJet.Workflow.Core.Entities](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/)

```csharp
public class ProcessInstanceTreeItem : IProcessInstanceTreeItem, IEntity
```

## Type Hierarchy

-   ProcessInstanceTreeItem Current type
    -   Implemented interfaces
        -   [IEntity](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/IEntity/)
        -   [IProcessInstanceTreeItem](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/IProcessInstanceTreeItem/)

## Properties

`public Guid Id { get; set; }` 

Gets or sets the process instance identifier exposed by [ProcessInstance.ProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public Guid? ParentProcessId { get; set; }` 

Gets or sets the identifier of the parent process instance exposed by [ProcessInstance.ParentProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public Guid RootProcessId { get; set; }` 

Gets or sets the identifier of the root process instance exposed by [ProcessInstance.RootProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public string StartingTransition { get; set; }` 

Gets or sets the name of the transition that started the subprocess, as recorded by [ProcessDefinition.StartingTransition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessDefinition/).

`public string SubprocessName { get; set; }` 

Gets or sets the persisted value exposed by [ProcessInstance.SubprocessName](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

## Methods

`public object GetValue(string key)` 

Gets the value of the property identified by `key`.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `key` | `String` | The name of a supported public property declared by [ProcessInstanceTreeItem](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstanceTreeItem/). |

### Returns

| Type | Description |
| --- | --- |
| `Object` | The property value identified by `key`. |

### Exceptions

| Type | Description |
| --- | --- |
| `ColumnNotExistsException` | `key` does not identify a supported property. |

`public void SetValue(string key, object value)` 

Sets the value of the property identified by `key`.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `key` | `String` | The name of a supported public property declared by [ProcessInstanceTreeItem](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstanceTreeItem/). |
| `value` | `Object` | The value to assign to the property identified by `key`. |

### Exceptions

| Type | Description |
| --- | --- |
| `ColumnNotExistsException` | `key` does not identify a supported property. |

[Previous ProcessInstanceStatusEntity](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstanceStatusEntity/) [Next ProcessSchemeEntity](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessSchemeEntity/)