@loopback/docs/site/apidocs/metadata.parameterdecoratorfactory.md

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---
lang: en
title: 'API docs: metadata.parameterdecoratorfactory'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/strongloop/loopback-next/tree/master/packages/metadata
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---

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[Home](./index.md) &gt; [@loopback/metadata](./metadata.md) &gt; [ParameterDecoratorFactory](./metadata.parameterdecoratorfactory.md)

## ParameterDecoratorFactory class

Factory for parameter decorators

<b>Signature:</b>

```typescript
export declare class ParameterDecoratorFactory<T> extends DecoratorFactory<T, MetadataMap<T[]>, ParameterDecorator> 
```
<b>Extends:</b> [DecoratorFactory](./metadata.decoratorfactory.md)<!-- -->&lt;T, [MetadataMap](./metadata.metadatamap.md)<!-- -->&lt;T\[\]&gt;, ParameterDecorator&gt;

## Methods

|  Method | Modifiers | Description |
|  --- | --- | --- |
|  [create()](./metadata.parameterdecoratorfactory.create.md) |  |  |
|  [createDecorator(key, spec, options)](./metadata.parameterdecoratorfactory.createdecorator.md) | <code>static</code> | Create a parameter decorator function |
|  [mergeWithInherited(inheritedMetadata, target, methodName, parameterIndex)](./metadata.parameterdecoratorfactory.mergewithinherited.md) |  |  |
|  [mergeWithOwn(ownMetadata, target, methodName, parameterIndex)](./metadata.parameterdecoratorfactory.mergewithown.md) |  |  |