# Class ProcessInstancePersistenceEntity

OptimaJet.Workflow.Core.Entities.ProcessInstancePersistenceEntity

Represents a persistence record containing the serialized value of a process instance parameter.

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

```csharp
public class ProcessInstancePersistenceEntity : IEntity
```

## Type Hierarchy

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

## Properties

`public Guid Id { get; set; }` 

Gets or sets the identifier of the persistence record.

`public Guid ProcessId { get; set; }` 

Gets or sets the identifier of the process instance that owns the persisted parameter.

`public string ParameterName { get; set; }` 

Gets or sets the name of the persisted parameter.

`public string Value { get; set; }` 

Gets or sets the serialized value of the persisted parameter.

`public string TenantId { get; set; }` 

Gets or sets the tenant identifier associated with the process instance, or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) for a tenantless process.

## Methods

`public object GetValue(string key)` 

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

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `key` | `String` | The case-sensitive name of [ProcessInstancePersistenceEntity.Id](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/), [ProcessInstancePersistenceEntity.ProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/), [ProcessInstancePersistenceEntity.ParameterName](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/), [ProcessInstancePersistenceEntity.Value](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/), or [ProcessInstancePersistenceEntity.TenantId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/). |

### Returns

| Type | Description |
| --- | --- |
| `Object` | The value of the property selected by `key`. |

### Exceptions

| Type | Description |
| --- | --- |
| `ColumnNotExistsException` | `key` does not match the name of 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 case-sensitive name of [ProcessInstancePersistenceEntity.Id](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/), [ProcessInstancePersistenceEntity.ProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/), [ProcessInstancePersistenceEntity.ParameterName](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/), [ProcessInstancePersistenceEntity.Value](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/), or [ProcessInstancePersistenceEntity.TenantId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/). |
| `value` | `Object` | The value to assign. Values for [ProcessInstancePersistenceEntity.Id](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/) and [ProcessInstancePersistenceEntity.ProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/) must be a [Guid](https://learn.microsoft.com/dotnet/api/system.guid); a value for [ProcessInstancePersistenceEntity.ParameterName](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/), [ProcessInstancePersistenceEntity.Value](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/), or [ProcessInstancePersistenceEntity.TenantId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/) that is not a [string](https://learn.microsoft.com/dotnet/api/system.string) is assigned as [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null). |

### Exceptions

| Type | Description |
| --- | --- |
| `ColumnNotExistsException` | `key` does not match the name of a supported property. |
| `InvalidCastException` | `key` identifies [ProcessInstancePersistenceEntity.Id](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/) or [ProcessInstancePersistenceEntity.ProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/), and `value` is not [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) and is not a [Guid](https://learn.microsoft.com/dotnet/api/system.guid). |
| `NullReferenceException` | `key` identifies [ProcessInstancePersistenceEntity.Id](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/) or [ProcessInstancePersistenceEntity.ProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Entities/ProcessInstancePersistenceEntity/), and `value` is [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null). |

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