public static interface Graph.Features.VertexFeatures extends Graph.Features.ElementFeatures
Vertex
operations.supportsAddProperty, supportsRemoveProperty
Modifier and Type | Field and Description |
---|---|
static String |
FEATURE_ADD_VERTICES |
static String |
FEATURE_DUPLICATE_MULTI_PROPERTIES |
static String |
FEATURE_META_PROPERTIES |
static String |
FEATURE_MULTI_PROPERTIES |
static String |
FEATURE_REMOVE_VERTICES |
static String |
FEATURE_UPSERT |
FEATURE_ADD_PROPERTY, FEATURE_ANY_IDS, FEATURE_CUSTOM_IDS, FEATURE_NUMERIC_IDS, FEATURE_REMOVE_PROPERTY, FEATURE_STRING_IDS, FEATURE_USER_SUPPLIED_IDS, FEATURE_UUID_IDS
Modifier and Type | Method and Description |
---|---|
default VertexProperty.Cardinality |
getCardinality(String key)
Gets the
VertexProperty.Cardinality for a key. |
default Graph.Features.VertexPropertyFeatures |
properties()
Gets features related to "properties" on a
Vertex . |
default boolean |
supportsAddVertices()
Determines if a
Vertex can be added to the Graph . |
default boolean |
supportsDuplicateMultiProperties()
Determines if a
Vertex can support non-unique values on the same key. |
default boolean |
supportsMetaProperties()
Determines if a
Vertex can support properties on vertex properties. |
default boolean |
supportsMultiProperties()
Determines if a
Vertex can support multiple properties with the same key. |
default boolean |
supportsRemoveVertices()
Determines if a
Vertex can be removed from the Graph . |
default boolean |
supportsUpsert()
Determines if the
Graph implementation uses upsert functionality as opposed to insert
functionality for Graph.addVertex(String) . |
supportsAddProperty, supportsAnyIds, supportsCustomIds, supportsNumericIds, supportsRemoveProperty, supportsStringIds, supportsUserSuppliedIds, supportsUuidIds, willAllowId
static final String FEATURE_ADD_VERTICES
static final String FEATURE_MULTI_PROPERTIES
static final String FEATURE_DUPLICATE_MULTI_PROPERTIES
static final String FEATURE_META_PROPERTIES
static final String FEATURE_REMOVE_VERTICES
static final String FEATURE_UPSERT
default VertexProperty.Cardinality getCardinality(String key)
VertexProperty.Cardinality
for a key. By default, this method will return
VertexProperty.Cardinality.list
. Implementations that employ a schema can consult it to
determine the VertexProperty.Cardinality
. Those that do no have a schema can return their
default VertexProperty.Cardinality
for every key.
Note that this method is primarily used by TinkerPop for internal usage and may not be suitable to
reliably determine the cardinality of a key. For some implementation it may offer little more than a
hint on the actual cardinality. Generally speaking it is likely best to drop down to the API of the
Graph
implementation for any schema related queries.default boolean supportsAddVertices()
Vertex
can be added to the Graph
.default boolean supportsRemoveVertices()
Vertex
can be removed from the Graph
.default boolean supportsMultiProperties()
Vertex
can support multiple properties with the same key.default boolean supportsDuplicateMultiProperties()
Vertex
can support non-unique values on the same key. For this value to be
true
, then supportsMetaProperties()
must also return true. By default this method,
just returns what supportsMultiProperties()
returns.default boolean supportsMetaProperties()
Vertex
can support properties on vertex properties. It is assumed that a
graph will support all the same data types for meta-properties that are supported for regular
properties.default boolean supportsUpsert()
Graph
implementation uses upsert functionality as opposed to insert
functionality for Graph.addVertex(String)
. This feature gives graph providers some flexibility as
to how graph mutations are treated. For graph providers, testing of this feature (as far as TinkerPop
is concerned) only covers graphs that can support user supplied identifiers as there is no other way
for TinkerPop to know what aspect of a vertex is unique to appropriately apply assertions. Graph
providers, especially those who support schema features, may have other methods for uniquely identifying
a vertex and should therefore resort to their own body of tests to validate this feature.default Graph.Features.VertexPropertyFeatures properties()
Vertex
.Copyright © 2013–2018 Apache Software Foundation. All rights reserved.