Package org.apache.tapestry5.ioc.internal.services

## Class MasterObjectProviderImpl

- java.lang.Object
- - org.apache.tapestry5.ioc.internal.services.MasterObjectProviderImpl

- All Implemented Interfaces:
    `MasterObjectProvider`

      @PreventServiceDecoration
      public class MasterObjectProviderImpl
      extends java.lang.Object
      implements MasterObjectProvider

- - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `MasterObjectProviderImpl​(java.util.List<ObjectProvider> configuration, OperationTracker tracker)` |

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `<T> T` | `provide​(java.lang.Class<T> objectType, AnnotationProvider annotationProvider, ObjectLocator locator, boolean required)` | Provides an object based on an expression.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### MasterObjectProviderImpl

          public MasterObjectProviderImpl​(java.util.List<ObjectProvider> configuration,
                                          OperationTracker tracker)

  - ### Method Detail

    - #### provide

          public <T> T provide​(java.lang.Class<T> objectType,
                               AnnotationProvider annotationProvider,
                               ObjectLocator locator,
                               boolean required)

      Description copied from interface: `MasterObjectProvider`
      Provides an object based on an expression. The process of providing objects occurs within a particular context, which will typically be a service builder method, service contributor method, or service decorator method. The locator parameter provides access to the services visible to that context. When the value is required and no `ObjectProvider` provided a non-null value, then `ObjectLocator.getService(Class, Class[])` is invoked (with no marker annotations), to provide a uniquely matching service, or throw a failure exception if no single service can be found.
      Specified by:
        `provide` in interface `MasterObjectProvider`
      Parameters:
        `objectType` - the expected object type
        `annotationProvider` - provides access to annotations (typically, the field or parameter to which an injection-related annotation is attached); annotations on the field or parameter may also be used when resolving the desired object
        `locator` - locator for the context in which the provider is being used
        `required` - if true (normal case) a value must be provided; if false then it is allowed for no ObjectProvider to provide a value, and this method may return null to indicate the failure
      Returns:
        the requested object, or null if this object provider can not supply an object