ExtensionFilter (Jenkins core 2.423 API)

java.lang.Object
- jenkins.ExtensionFilter

All Implemented Interfaces:

ExtensionPoint
```
public abstract class ExtensionFilter
extends Object
implements ExtensionPoint
```
Filters out ExtensionComponents discovered by ExtensionFinders, as if they were never discovered.
This is useful for those who are deploying restricted/simplified version of Jenkins by reducing the functionality.
Because of the way ExtensionFinder works, even when an extension component is rejected by a filter, its instance still gets created first.

Since:

1.472

Author:

Kohsuke Kawaguchi

See Also:

DescriptorVisibilityFilter, ExtensionComponentSet.filtered()

Nested Class Summary
- Nested classes/interfaces inherited from interface hudson.ExtensionPoint
  ExtensionPoint.LegacyInstancesAreScopedToHudson

Constructor Summary

Constructors
Constructor Description

ExtensionFilter()

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`static ExtensionList<ExtensionFilter>`	`all()`	All registered `ExtensionFilter` instances.
`abstract <T> boolean`	`allows(Class<T> type, ExtensionComponent<T> component)`	Checks if a newly discovered extension is allowed to participate into Jenkins.
`static <T> boolean`	`isAllowed(Class<T> type, ExtensionComponent<T> component)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ExtensionFilter
```
public ExtensionFilter()
```
- Method Detail
  - allows
```
public abstract <T> boolean allows(Class<T> type,
                                   ExtensionComponent<T> component)
```
    Checks if a newly discovered extension is allowed to participate into Jenkins.
    To filter Descriptors based on the Describable subtypes, do as follows:
    return !component.isDescriptorOf(Builder.class);
    Parameters:
    
    type - The type of the extension that we are discovering. This is not the actual instance type, but the contract type, such as Descriptor, AdministrativeMonitor, etc.
    
    component - the actual discovered Extension object.
    
    Returns:
    
    true to let the component into Jenkins. false to drop it and pretend as if it didn't exist. When any one of ExtensionFilters veto a component, it gets dropped.
  - isAllowed
```
public static <T> boolean isAllowed(Class<T> type,
                                    ExtensionComponent<T> component)
```
  - all
```
public static ExtensionList<ExtensionFilter> all()
```
    All registered ExtensionFilter instances.