Implemented ability to specify adapter and utility names in Python. Use

the ``@zope.component.named(name)`` decorator to specify the name.

All tox environments pass and coverage is at 100%.

CHANGES.rst

@@ -1,14 +1,17 @@
 CHANGES
 *******
 
-4.1.1 (unreleased)
+4.2.0 (unreleased)
 ==================
 
 - Updated ``boostrap.py`` to version 2.2.
 
 - Reset the cached ``adapter_hooks`` at
   ``zope.testing.cleanup.cleanUp`` time (LP1100501).
 
+- Implemented ability to specify adapter and utility names in Python. Use
+  the ``@zope.component.named(name)`` decorator to specify the name.
+
 
 4.1.0 (2013-02-28)
 ==================

docs/zcml.rst

@@ -69,9 +69,9 @@ the <adapter /> directive:
 
 .. doctest::
 
+   >>> import zope.component
    >>> from zope.component.tests.examples import clearZCML
    >>> clearZCML()
-   >>> import zope.component
    >>> zope.component.queryAdapter(Content(), IApp, 'test') is None
    True
 
@@ -143,13 +143,13 @@ Of course, if no factory is provided at all, we will get an error:
          ValueError: No factory specified
 
 
-Declaring ``for`` and ``provides`` in Python
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Declaring ``for``, ``provides`` and ``name`` in Python
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-The <adapter /> directive can figure out from the in-line Python
-declaration (using ``zope.component.adapts()`` or
-``zope.component.adapter()`` as well as ``zope.interface.implements``)
-what the adapter should be registered for and what it provides:
+The <adapter /> directive can figure out from the in-line Python declaration
+(using ``zope.component.adapts()`` or ``zope.component.adapter()``,
+``zope.interface.implements`` as well as ``zope.component.named``) what the
+adapter should be registered for and what it provides:
 
 .. doctest::
 
@@ -193,6 +193,14 @@ ZCML can't figure out what it should provide either:
    ZopeXMLConfigurationError: File "<string>", line 4.2-7.8
          TypeError: Missing 'provides' attribute
 
+Let's now register an adapter that has a name specified in Python:
+
+   >>> runSnippet('''
+   ...   <adapter factory="zope.component.testfiles.components.Comp4" />''')
+
+   >>> zope.component.getAdapter(Content(), IApp, 'app').__class__
+   <class 'zope.component.testfiles.components.Comp4'>
+
 A not so common edge case is registering adapters directly for
 classes, not for interfaces.  For example:
 
@@ -1037,6 +1045,27 @@ We can repeat the same drill for utility factories:
    ZopeXMLConfigurationError: File "<string>", line 4.2-4.59
          TypeError: Missing 'provides' attribute
 
+Declaring ``name`` in Python
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Let's now register a utility that has a name specified in Python:
+
+   >>> runSnippet('''
+   ...   <utility component="zope.component.testfiles.components.comp4" />''')
+
+   >>> from zope.component.testfiles.components import comp4
+   >>> zope.component.getUtility(IApp, name='app') is comp4
+   True
+
+   >>> runSnippet('''
+   ...   <utility factory="zope.component.testfiles.components.Comp4" />''')
+
+   >>> zope.component.getUtility(IApp, name='app') is comp4
+   False
+   >>> zope.component.getUtility(IApp, name='app').__class__
+   <class 'zope.component.testfiles.components.Comp4'>
+
+
 Protected utilities
 ~~~~~~~~~~~~~~~~~~~
 

setup.py

@@ -70,7 +70,7 @@ def read(*rnames):
 
 setup(
     name='zope.component',
-    version='4.1.1.dev0',
+    version='4.2.0.dev0',
     url='http://pypi.python.org/pypi/zope.component',
     license='ZPL 2.1',
     description='Zope Component Architecture',
@@ -105,7 +105,7 @@ def read(*rnames):
     tests_require = TESTS_REQUIRE,
     test_suite='__main__.alltests',
     install_requires=['setuptools',
-                      'zope.interface>=3.8.0',
+                      'zope.interface>=4.1.0',
                       'zope.event',
                       ],
     include_package_data = True,

src/zope/component/__init__.py

@@ -16,6 +16,7 @@
 from zope.interface import Interface
 from zope.interface import implementedBy
 from zope.interface import moduleProvides
+from zope.interface import named
 from zope.interface import providedBy
 
 from zope.component.interfaces import ComponentLookupError

src/zope/component/_declaration.py

@@ -15,7 +15,7 @@
 """
 import sys
 
-from zope.component._compat import CLASS_TYPES
+from zope.component._compat import CLASS_TYPES, _BLANK
 
 class adapter(object):
 
@@ -46,6 +46,9 @@ def adapts(*interfaces):
 def adaptedBy(ob):
     return getattr(ob, '__component_adapts__', None)
 
+def getName(ob):
+    return getattr(ob, '__component_name__', _BLANK)
+
 class _adapts_descr(object):
     def __init__(self, interfaces):
         self.interfaces = interfaces

src/zope/component/testfiles/components.py

@@ -17,6 +17,7 @@
 from zope.interface import Attribute
 from zope.interface import implementer
 from zope.component import adapter
+from zope.component import named
 
 class IAppb(Interface):
     a = Attribute('test attribute')
@@ -40,7 +41,6 @@ class Content(object):
 @adapter(IContent)
 @implementer(IApp)
 class Comp(object):
-    pass
 
     def __init__(self, *args):
         # Ignore arguments passed to constructor
@@ -57,6 +57,14 @@ class Comp3(object):
     def __init__(self, context):
         self.context = context
 
+@adapter(IContent)
+@implementer(IApp)
+@named('app')
+class Comp4(object):
+    def __init__(self, context=None):
+        self.context = context
+
 comp = Comp()
+comp4 = Comp4()
 
 content = Content()

src/zope/component/tests/test_zcml.py

@@ -83,7 +83,7 @@ class Test_adapter(unittest.TestCase):
     def _callFUT(self, *args, **kw):
         from zope.component.zcml import adapter
         return adapter(*args, **kw)
- 
+
     def test_empty_factory(self):
         from zope.interface import Interface
         from zope.component.zcml import ComponentConfigurationError
@@ -92,7 +92,7 @@ class IFoo(Interface):
         _cfg_ctx = _makeConfigContext()
         self.assertRaises(ComponentConfigurationError,
                           self._callFUT, _cfg_ctx, [], [Interface], IFoo)
- 
+
     def test_multiple_factory_multiple_for_(self):
         from zope.interface import Interface
         from zope.component.zcml import ComponentConfigurationError
@@ -116,7 +116,27 @@ def __init__(self, context):
                 self.context = context
         _cfg_ctx = _makeConfigContext()
         self.assertRaises(TypeError, self._callFUT, _cfg_ctx, [_Factory])
-
+
+    def test_no_name(self):
+        from zope.interface import Interface
+        class IFoo(Interface):
+            pass
+        class IBar(Interface):
+            pass
+        from zope.component import adapter, named
+        from zope.interface import implementer
+        @adapter(IFoo)
+        @implementer(IBar)
+        @named('bar')
+        class _Factory(object):
+            def __init__(self, context):
+                self.context = context
+        _cfg_ctx = _makeConfigContext()
+        self._callFUT(_cfg_ctx, [_Factory])
+        # Register the adapter
+        action =_cfg_ctx._actions[0][1]
+        self.assertEqual(action['args'][4], 'bar')
+
     def test_no_for__factory_adapts_no_provides_factory_not_implements(self):
         from zope.interface import Interface
         from zope.component._declaration import adapter
@@ -126,7 +146,7 @@ def __init__(self, context):
                 self.context = context
         _cfg_ctx = _makeConfigContext()
         self.assertRaises(TypeError, self._callFUT, _cfg_ctx, [_Factory])
- 
+
     def test_multiple_factory_single_for__w_name(self):
         from zope.interface import Interface
         from zope.component.interface import provideInterface
@@ -164,7 +184,7 @@ class Bar(object):
         self.assertEqual(action['callable'], provideInterface)
         self.assertEqual(action['discriminator'], None)
         self.assertEqual(action['args'], ('', Interface))
- 
+
     @skipIfNoSecurity
     def test_single_factory_single_for_w_permission(self):
         from zope.interface import Interface
@@ -194,7 +214,7 @@ class Foo(object):
         self.assertEqual(action['args'][3], IFoo)
         self.assertEqual(action['args'][4], '')
         self.assertEqual(action['args'][5], 'TESTING')
- 
+
     @skipIfNoSecurity
     def test_single_factory_single_for_w_locate_no_permission(self):
         from zope.interface import Interface
@@ -223,7 +243,7 @@ class Foo(object):
         self.assertEqual(action['args'][3], IFoo)
         self.assertEqual(action['args'][4], '')
         self.assertEqual(action['args'][5], 'TESTING')
- 
+
     @skipIfNoSecurity
     def test_single_factory_single_for_w_trusted_no_permission(self):
         from zope.interface import Interface
@@ -251,7 +271,7 @@ class Foo(object):
         self.assertEqual(action['args'][3], IFoo)
         self.assertEqual(action['args'][4], '')
         self.assertEqual(action['args'][5], 'TESTING')
- 
+
     def test_no_for__no_provides_factory_adapts_factory_implements(self):
         from zope.interface import Interface
         from zope.interface import implementer
@@ -610,7 +630,7 @@ class Foo(object):
         self.assertEqual(action['discriminator'], None)
         self.assertEqual(action['args'], ('', IFoo))
 
-    def test_w_component_w_provides_w_naem(self):
+    def test_w_component_w_provides_w_name(self):
         from zope.interface import Interface
         from zope.component.interface import provideInterface
         from zope.component.zcml import handler
@@ -638,6 +658,23 @@ class IFoo(Interface):
         self.assertEqual(action['discriminator'], None)
         self.assertEqual(action['args'], ('', IFoo))
 
+    def test_w_component_wo_provides_wo_name(self):
+        from zope.interface import Interface, implementer, named
+        from zope.component.zcml import handler
+        class IFoo(Interface):
+            pass
+        @implementer(IFoo)
+        @named('foo')
+        class Foo(object):
+            pass
+        foo = Foo()
+        _cfg_ctx = _makeConfigContext()
+        self._callFUT(_cfg_ctx, component=foo)
+        action =_cfg_ctx._actions[0][1]
+        self.assertEqual(action['args'][1], foo)
+        self.assertEqual(action['args'][2], IFoo)
+        self.assertEqual(action['args'][3], 'foo')
+
     def test_w_component_wo_provides_component_provides(self):
         from zope.interface import Interface
         from zope.interface import directlyProvides

src/zope/component/zcml.py

@@ -26,7 +26,7 @@
 from zope.schema import TextLine
 
 from zope.component._api import getSiteManager
-from zope.component._declaration import adaptedBy
+from zope.component._declaration import adaptedBy, getName
 from zope.component.interface import provideInterface
 from zope.component._compat import _BLANK
 
@@ -182,6 +182,10 @@ def adapter(_context, factory, provides=None, for_=None, permission=None,
         if provides is None:
             raise TypeError("Missing 'provides' attribute")
 
+    if name == '':
+        if len(factory) == 1:
+            name = getName(factory[0])
+
     # Generate a single factory from multiple factories:
     factories = factory
     if len(factories) == 1:
@@ -380,6 +384,12 @@ def utility(_context, provides=None, component=None, factory=None,
         else:
             raise TypeError("Missing 'provides' attribute")
 
+    if name == '':
+        if factory:
+            name = getName(factory)
+        else:
+            name = getName(component)
+
     if permission is not None:
         component = proxify(component, provides=provides, permission=permission)