Package org.gradle.api.plugins

## Interface PluginContainer

- All Superinterfaces:
    `Collection<Plugin>`, `DomainObjectCollection<Plugin>`, `DomainObjectSet<Plugin>`, `Iterable<Plugin>`, `PluginCollection<Plugin>`, `Set<Plugin>`

      public interface PluginContainer
      extends PluginCollection<Plugin>

  A `PluginContainer` is used to manage a set of `Plugin` instances applied to a particular project.

  Plugins can be specified using either an id or type. The id of a plugin is specified using a META-INF/gradle-plugins/${id}.properties classpath resource.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `<T extends Plugin> T` | `apply​(Class<T> type)` | Applies a plugin to the project.
    `Plugin` | `apply​(String id)` | Has the same behavior as `apply(Class)` except that the plugin is specified via its id.
    `<T extends Plugin> T` | `findPlugin​(Class<T> type)` | Returns the plugin for the given type.
    `Plugin` | `findPlugin​(String id)` | Returns the plugin for the given id.
    `<T extends Plugin> T` | `getAt​(Class<T> type)` | Returns a plugin with the specified type if this plugin has been used in the project.
    `Plugin` | `getAt​(String id)` | Returns a plugin with the specified id if this plugin has been used in the project.
    `<T extends Plugin> T` | `getPlugin​(Class<T> type)` | Returns a plugin with the specified type if this plugin has been used in the project.
    `Plugin` | `getPlugin​(String id)` | Returns a plugin with the specified id if this plugin has been used in the project.
    `boolean` | `hasPlugin​(Class<? extends Plugin> type)` | Returns true if the container has a plugin with the given type, false otherwise.
    `boolean` | `hasPlugin​(String id)` | Returns true if the container has a plugin with the given id, false otherwise.
    `void` | `withId​(String pluginId, Action<? super Plugin> action)` | Executes or registers an action for a plugin with given id.

    - ### Methods inherited from interface java.util.Collection

      `parallelStream, removeIf, stream, toArray`

    - ### Methods inherited from interface org.gradle.api.DomainObjectCollection

      `addAllLater, addLater, all, all, configureEach, whenObjectAdded, whenObjectAdded, whenObjectRemoved, whenObjectRemoved, withType, withType`

    - ### Methods inherited from interface org.gradle.api.DomainObjectSet

      `findAll`

    - ### Methods inherited from interface java.lang.Iterable

      `forEach`

    - ### Methods inherited from interface org.gradle.api.plugins.PluginCollection

      `add, addAll, clear, matching, matching, remove, removeAll, whenPluginAdded, whenPluginAdded, withType`

    - ### Methods inherited from interface java.util.Set

      `contains, containsAll, equals, hashCode, isEmpty, iterator, retainAll, size, spliterator, toArray, toArray`

- - ### Method Detail

    - #### apply

          Plugin apply​(String id)

      Has the same behavior as `apply(Class)` except that the plugin is specified via its id. Not all plugins have an id.
      Parameters:
        `id` - The id of the plugin to be applied.
      Returns:
        The plugin which has been used against the project.

    - #### apply

          <T extends Plugin> T apply​(Class<T> type)

      Applies a plugin to the project. This usually means that the plugin uses the project API to add and modify the state of the project. This method can be called an arbitrary number of times for a particular plugin type. The plugin will be actually used only the first time this method is called.
      Parameters:
        `type` - The type of the plugin to be used
      Returns:
        The plugin which has been used against the project.

    - #### hasPlugin

          boolean hasPlugin​(String id)

      Returns true if the container has a plugin with the given id, false otherwise.
      Parameters:
        `id` - The id of the plugin

    - #### hasPlugin

          boolean hasPlugin​(Class<? extends Plugin> type)

      Returns true if the container has a plugin with the given type, false otherwise.
      Parameters:
        `type` - The type of the plugin

    - #### findPlugin

          @Nullable
          Plugin findPlugin​(String id)

      Returns the plugin for the given id.
      Parameters:
        `id` - The id of the plugin
      Returns:
        the plugin or null if no plugin for the given id exists.

    - #### findPlugin

          @Nullable
          <T extends Plugin> T findPlugin​(Class<T> type)

      Returns the plugin for the given type.
      Parameters:
        `type` - The type of the plugin
      Returns:
        the plugin or null if no plugin for the given type exists.

    - #### getPlugin

          Plugin getPlugin​(String id)
                    throws UnknownPluginException

      Returns a plugin with the specified id if this plugin has been used in the project.
      Parameters:
        `id` - The id of the plugin
      Throws:
        `UnknownPluginException` - When there is no plugin with the given id.

    - #### getPlugin

          <T extends Plugin> T getPlugin​(Class<T> type)
                                  throws UnknownPluginException

      Returns a plugin with the specified type if this plugin has been used in the project.
      Parameters:
        `type` - The type of the plugin
      Throws:
        `UnknownPluginException` - When there is no plugin with the given type.

    - #### getAt

          Plugin getAt​(String id)
                throws UnknownPluginException

      Returns a plugin with the specified id if this plugin has been used in the project. You can use the Groovy `[]` operator to call this method from a build script.
      Parameters:
        `id` - The id of the plugin
      Throws:
        `UnknownPluginException` - When there is no plugin with the given id.

    - #### getAt

          <T extends Plugin> T getAt​(Class<T> type)
                              throws UnknownPluginException

      Returns a plugin with the specified type if this plugin has been used in the project. You can use the Groovy `[]` operator to call this method from a build script.
      Parameters:
        `type` - The type of the plugin
      Throws:
        `UnknownPluginException` - When there is no plugin with the given type.

    - #### withId

          void withId​(String pluginId,
                      Action<? super Plugin> action)

      Executes or registers an action for a plugin with given id. If the plugin was already applied, the action is executed. If the plugin is applied sometime later the action will be executed after the plugin is applied. If the plugin is never applied, the action is never executed. The behavior is similar to `DomainObjectCollection.withType(Class, org.gradle.api.Action)`.
      Parameters:
        `pluginId` - the id of the plugin
        `action` - the action