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Package WebOrganiser :: Module RDFAccess :: Class Store |
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A convenience wrapper around RDF stores.
Method Summary | |
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Initialise with the given underlying 'store', a 'handlers' collection, and an optional 'base_uri' which can be used to qualify URI references. | |
Add an 'item' having the given 'item_type_name' to the store, using the definition document 'doc'. | |
Close the underlying store. | |
Combine the 'results', returning a collection of items. | |
Commit changes to the underlying store if appropriate. | |
Return a list of contexts found in this store. | |
Within the given document 'doc', inside the given 'element', insert the top-level details of the given 'items'. | |
fill_element_properties(self,
doc,
elements,
property_type,
property_value,
labels)
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Within the given document 'doc', inside the given 'element', insert the XML serialisation of each item in the supplied 'items'. | |
Return a comparison expression for the given 'comparison' and 'values', suitable for triple stores which support querying. | |
Return a copy of this store which uses the given 'context' to constrain operations on the stored triples. | |
Return the date string for the given 'attributes'. | |
Return the handler suitable for processing the given 'item'. | |
Return the handler capable of processing items having the given 'item_type_name'. | |
Return an identifier built from the given 'item'. | |
get_identifier_from_item_type(self,
item_type)
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Return an item built from the given 'identifier'. | |
Similar to get_item_from_identifer, but with a narrower range of types, return an item for the given 'reference' according to the following mapping: BNode starts with _ URIRef all other symbols NOTE: This is dependent on referenced items being defined by/under BNode NOTE: objects, but this is probably going to be phased out. | |
Return the type of the given 'item'. | |
get_item_types_from_identifiers(self,
values)
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To query the store, prepare filters, taking information from the given 'attributes' and adding the default item types where appropriate, and return a list of items. | |
Return a label for a (typically) type-based 'uriref'. | |
Query the handlers and return a tuple of predicates which can represent the given 'attribute'. | |
Return the prefix for the 'uriref' minus the 'label'. | |
Query the handlers and return the abstract property types which the given 'uriref' can represent. | |
Return a list of items found using the given 'values': a list of unique identifiers each corresponding to an item. | |
Return a list of all item types supported by the handlers. | |
Return the given 'item' as a URIRef or None if the 'item' is not of a compatible/equivalent nature. | |
Query the handlers and return lists of URIRefs which can represent the given 'attribute'. | |
Query the handlers and return a list of URIRefs which can represent the given 'item_type_name'. | |
Query the handlers and return URIRefs which can represent the given 'property_type_name'. | |
Return a list of URIRef objects corresponding to the given property type 'identifier' or None if any URIRef objects should correspond (when 'identifier' is specified as None). | |
get_values_from_identifier(self,
property_type,
value)
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get_values_using_predicates(self,
predicates,
value)
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Return whether the store contains the given 'item'. | |
From the given 'stream', parse an item having the given 'item_type_name' and bearing the given 'uriref'. | |
Removes the specified 'context' from the database. | |
Remove the given 'item' from the store. | |
Roll back changes to the underlying store if appropriate. | |
Serialise the given 'item' to the given 'stream', specifying additional arguments to control the serialisation process. |
Class Variable Summary | |
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type |
DuplicateResourceError = WebOrganiser.RDFAccess.DuplicateResourceError |
Method Details |
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__init__(self,
store,
handlers,
base_uri='/')
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add_item(self, item, item_type_name, doc)Add an 'item' having the given 'item_type_name' to the store, using the definition document 'doc'. If 'item' is None, a new item will be added to the store. |
close(self)Close the underlying store. |
combine_items(self, results)Combine the 'results', returning a collection of items. |
commit(self)Commit changes to the underlying store if appropriate. |
contexts(self)Return a list of contexts found in this store. |
fill_element(self, doc, element, items, element_name='item')Within the given document 'doc', inside the given 'element', insert the top-level details of the given 'items'. Each item will be represented by an element of the optional 'element_name' (or the default name, "item"). The fill_element method provides item summaries, more appropriate for list views. Typically, each item will look something like this: <item item-value="..." item-type="..."> <prop1 attrA="..."/> <prop2 attrB="..."/> </item> |
fill_element_serialised(self, doc, element, items, qualifier=None)Within the given document 'doc', inside the given 'element', insert the XML serialisation of each item in the supplied 'items'. The fill_element_serialised method provides an accurate rendition of each item in RDFCalendar's XML format. |
get_comparison(self, comparison, values)Return a comparison expression for the given 'comparison' and 'values', suitable for triple stores which support querying. |
get_context(self, context)Return a copy of this store which uses the given 'context' to constrain operations on the stored triples. |
get_date_from_attributes(self, **attributes)Return the date string for the given 'attributes'. |
get_handler(self, item)Return the handler suitable for processing the given 'item'. |
get_handler_for_item_type_name(self, item_type_name)Return the handler capable of processing items having the given 'item_type_name'. |
get_identifier_from_item(self, item)Return an identifier built from the given 'item'. Here, we distinguish between BNode, URIRef within the store, and other URIRef items as follows: BNode starts with _ URIRef within base URI for store unprefixed (remove the base URI) URIRef starts with - |
get_item_from_identifier(self, identifier)Return an item built from the given 'identifier'. Here, we distinguish between BNode, URIRef within the store, and other URIRef items as follows: BNode starts with _ URIRef within base URI for store unprefixed (add the base URI) URIRef starts with - |
get_item_from_reference(self, reference)Similar to get_item_from_identifer, but with a narrower range of types, return an item for the given 'reference' according to the following mapping: BNode starts with _ URIRef all other symbols NOTE: This is dependent on referenced items being defined by/under BNode NOTE: objects, but this is probably going to be phased out. |
get_item_type(self, item)Return the type of the given 'item'. |
get_items_using_attributes(self, attributes)To query the store, prepare filters, taking information from the given 'attributes' and adding the default item types where appropriate, and return a list of items. Supported attributes: filter-item-value, filter-type search-value, search-type, search-operation (attributes supported by get_date_from_attributes) |
get_label(self, uriref)Return a label for a (typically) type-based 'uriref'. |
get_predicates_for_attribute(self, attribute)Query the handlers and return a tuple of predicates which can represent the given 'attribute'. |
get_prefix(self, uriref, label)Return the prefix for the 'uriref' minus the 'label'. |
get_property_types_for_uriref(self, uriref)Query the handlers and return the abstract property types which the given 'uriref' can represent. |
get_selected_items(self, values)Return a list of items found using the given 'values': a list of unique identifiers each corresponding to an item. |
get_supported_item_types(self)Return a list of all item types supported by the handlers. |
get_uriref(self, item)Return the given 'item' as a URIRef or None if the 'item' is not of a compatible/equivalent nature. |
get_urirefs_for_attribute(self, attribute)Query the handlers and return lists of URIRefs which can represent the given 'attribute'. |
get_urirefs_for_item_type(self, item_type_name)Query the handlers and return a list of URIRefs which can represent the given 'item_type_name'. |
get_urirefs_for_property_type(self, property_type_name)Query the handlers and return URIRefs which can represent the given 'property_type_name'. |
get_urirefs_from_identifier(self, identifier)Return a list of URIRef objects corresponding to the given property type 'identifier' or None if any URIRef objects should correspond (when 'identifier' is specified as None). |
has_item(self, item)Return whether the store contains the given 'item'. |
parse_item(self, stream, item_type_name, uriref=None)From the given 'stream', parse an item having the given 'item_type_name' and bearing the given 'uriref'. |
remove_context(self, context)Removes the specified 'context' from the database. |
remove_item(self, item, deep=0)Remove the given 'item' from the store. |
rollback(self)Roll back changes to the underlying store if appropriate. |
serialise_item(self, item, stream, *args, **kw)Serialise the given 'item' to the given 'stream', specifying additional arguments to control the serialisation process. |
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