d8aac7ee60
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@1122 fd906abe-77d9-0310-91a1-e0d9ade77398
105 lines
4.1 KiB
Python
105 lines
4.1 KiB
Python
#
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# Copyright (c) 2006 Helmut Merz helmutm@cy55.de
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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interface definitions for the typology package.
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$Id$
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"""
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from zope.app.container.interfaces import IContainer
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from zope import schema
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from zope.configuration.fields import GlobalObject
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from zope.interface import Interface, Attribute
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class IType(Interface):
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""" A collection of informations about a type; may be associated
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with an object (typically as an adapter) specifying the object's
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type.
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"""
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title = schema.TextLine(title=u'Title',
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description=u'A readable representation',
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required=True)
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token = schema.ASCIILine(title=u'Token',
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description=u'A representation used for identifying a type '
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'temporarily, e.g. on forms',
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required=True)
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tokenForSearch = schema.ASCIILine(title=u'Token for Search',
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description=u'A fairly unique token that may be used '
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'e.g. for identifying types via a catalog index')
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qualifiers = schema.List(title=u'Qualifiers',
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description=u'A set of markers for a simple classifcation of '
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'types, e.g. for selecting with '
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'ITypeManager.listTypes()',
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value_type=schema.ASCIILine())
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interfaceToProvide = GlobalObject(title=u'Interface to Provide',
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description=u'An (optional) interface (or schema) that '
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'objects of this type will provide')
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factory = GlobalObject(title=u'Factory',
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description=u'A factory (or class) that may be used for '
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'creating an object of this type')
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defaultContainer = schema.Object(IContainer,
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title=u'Default Container',
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description=u'Where objects of this type will be created in '
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'when no explicit container is given')
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typeProvider = schema.Object(Interface,
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title=u'Type Provider',
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description=u'A usually long-living object that corresponds '
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'to the type. Note that this object need not '
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'provide the IType interface itself but it '
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'should be adaptable to ITypeProvider')
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# possible extensions:
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# subTypes
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# parentTypes
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class ITypeManager(Interface):
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""" A utility or utility-like object (e.g. a container) that may
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manage (store, retrieve, assign) types.
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"""
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types = schema.Tuple(schema.Object(IType), unique=True,
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title=u'Types',
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description=u'A sequence of type objects managed by '
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'this type manager')
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def listTypes(**criteria):
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""" Return a sequence of type objects probably restricted via
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a set of query criteria.
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A simple implementation would use keyword arguments like:
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listTypes(include=('concept',), omit=('system',) where 'concept'
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and 'system' would be elements in the qualifiers attributes
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of the types.
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"""
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def getType(token):
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""" Return a type object belonging to the token given.
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"""
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class ITypeProvider(Interface):
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""" An object (probably used as an adapter) that may provide a
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certain type object.
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"""
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def getType():
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""" Return the type object this type provider provides.
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"""
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