A descriptor library is an object that contains known definitions. It contains a cache of descriptor objects mapped by definition name, and contains all types of descriptors except for file sets.

If the application provides a definition name that is not in the library, the application can include a descriptor loader that attempts to resolve the missing descriptor.

DescriptorLibrary is provided by the protorpc.descriptor module.

1. lookup_descriptor()
2. lookup_package()

Functions

DescriptorLibrary provides the following functions:

lookup_descriptor ( definition_name )

Gets a descriptor from the library for the given definition name. If the descriptor is not found, attempts to find it using the descriptor loader.

Arguments

definition_name

The definition name for which to find a descriptor.

Returns a descriptor describing the definition name.

Raises a DefinitionNotFoundError error if no descriptor exists for the given definition name.

lookup_package ( definition_name )

Determines the package name that any definition name belongs to. May check the parent for the package name. Attempts to resolve missing descriptors if provided a descriptor loader.

Arguments

definition_name

The definition name for which to find a package.

Returns a descriptor object describing the package name.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License , and code samples are licensed under the Apache 2.0 License . For details, see our Site Policies .