BaseVertexQuery (JanusGraph 0.3.1 API)

All Known Subinterfaces:

JanusGraphMultiVertexQuery<Q>, JanusGraphVertexQuery<Q>

All Known Implementing Classes:

BaseVertexCentricQueryBuilder, BasicVertexCentricQueryBuilder, MultiVertexCentricQueryBuilder, QueryContainer.QueryBuilder, VertexCentricQueryBuilder
```
public interface BaseVertexQuery<Q extends BaseVertexQuery<Q>>
```
BaseVertexQuery constructs and executes a query over incident edges or properties from the perspective of a vertex.
A VertexQuery has some JanusGraph specific convenience methods for querying for incident edges or properties. Using VertexQuery proceeds in two steps: 1) Define the query by specifying what to retrieve and 2) execute the query for the elements to retrieve.
This is the base interface for the specific implementations of a VertexQuery. Calling JanusGraphVertex.query() returns a JanusGraphVertexQuery for querying a single vertex. Calling Transaction.multiQuery(java.util.Collection) returns a JanusGraphMultiVertexQuery to execute the same query against multiple vertices at the same time which is typically faster.

Author:

Matthias Bröcheler (http://www.matthiasb.com)

See Also:

JanusGraphVertexQuery, JanusGraphMultiVertexQuery

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`Q`	`adjacent(org.apache.tinkerpop.gremlin.structure.Vertex vertex)` Restricts this query to only those edges that point to the given vertex.
`Q`	`direction(org.apache.tinkerpop.gremlin.structure.Direction d)` Query only for relations in the given direction.
`Q`	`has(String key)` Query for edges or properties that have defined property with the given key
`Q`	`has(String key, JanusGraphPredicate predicate, Object value)`
`Q`	`has(String type, Object value)` Query only for edges or properties that have an incident property or unidirected edge matching the given value.
`Q`	`hasNot(String key)` Query for edges or properties that DO NOT have a defined property with the given key
`Q`	`hasNot(String key, Object value)` Identical to `has(String, Object)` but negates the condition, i.e.
`<T extends Comparable<?>> Q`	`interval(String key, T start, T end)` Query for those edges or properties that have a property for the given key whose values lies in the interval by [start,end).
`Q`	`keys(String... keys)` Query for only those properties having one of the given property keys.
`Q`	`labels(String... labels)` Query for only those edges matching one of the given edge labels.
`Q`	`limit(int limit)` Sets the retrieval limit for this query.
`Q`	`orderBy(String key, org.apache.tinkerpop.gremlin.process.traversal.Order order)` Orders the relation results of this query according to their property for the given key in the given order (increasing/decreasing).
`Q`	`types(RelationType... type)` Query for only those relations matching one of the given relation types.
`Q`	`types(String... type)` Query for only those relations matching one of the given relation types.

- Method Detail
  - adjacent
```
Q adjacent(org.apache.tinkerpop.gremlin.structure.Vertex vertex)
```
    Restricts this query to only those edges that point to the given vertex.
    
    Parameters:
    
    vertex -
    
    Returns:
    
    this query builder
  - types
```
Q types(String... type)
```
    Query for only those relations matching one of the given relation types. By default, a query includes all relations in the result set.
    
    Parameters:
    
    type - relation types to query for
    
    Returns:
    
    this query
  - types
```
Q types(RelationType... type)
```
    Query for only those relations matching one of the given relation types. By default, a query includes all relations in the result set.
    
    Parameters:
    
    type - relation types to query for
    
    Returns:
    
    this query
  - labels
```
Q labels(String... labels)
```
    Query for only those edges matching one of the given edge labels. By default, an edge query includes all edges in the result set.
    
    Parameters:
    
    labels - edge labels to query for
    
    Returns:
    
    this query
  - keys
```
Q keys(String... keys)
```
    Query for only those properties having one of the given property keys. By default, a query includes all properties in the result set.
    
    Parameters:
    
    keys - property keys to query for
    
    Returns:
    
    this query
  - direction
```
Q direction(org.apache.tinkerpop.gremlin.structure.Direction d)
```
    Query only for relations in the given direction. By default, both directions are queried.
    
    Parameters:
    
    d - Direction to query for
    
    Returns:
    
    this query
  - has
```
Q has(String type,
      Object value)
```
    Query only for edges or properties that have an incident property or unidirected edge matching the given value.
    If type is a property key, then the query is restricted to edges or properties having an incident property matching this key-value pair. If type is an edge label, then it is expected that this label is unidirected (EdgeLabel.isUnidirected() and the query is restricted to edges or properties having an incident unidirectional edge pointing to the value which is expected to be a JanusGraphVertex.
    
    Parameters:
    
    type - JanusGraphType name
    
    value - Value for the property of the given key to match, or vertex to point unidirectional edge to
    
    Returns:
    
    this query
  - has
```
Q has(String key)
```
    Query for edges or properties that have defined property with the given key
    
    Parameters:
    
    key -
    
    Returns:
    
    this query
  - hasNot
```
Q hasNot(String key)
```
    Query for edges or properties that DO NOT have a defined property with the given key
    
    Parameters:
    
    key -
    
    Returns:
    
    this query
  - hasNot
```
Q hasNot(String key,
         Object value)
```
    Identical to has(String, Object) but negates the condition, i.e. matches those edges or properties that DO NOT satisfy this property condition.
    
    Parameters:
    
    key -
    
    value -
    
    Returns:
  - has
```
Q has(String key,
      JanusGraphPredicate predicate,
      Object value)
```
  - interval
```
<T extends Comparable<?>> Q interval(String key,
                                     T start,
                                     T end)
```
    Query for those edges or properties that have a property for the given key whose values lies in the interval by [start,end).
    
    Parameters:
    
    key - property key
    
    start - value defining the start of the interval (inclusive)
    
    end - value defining the end of the interval (exclusive)
    
    Returns:
    
    this query
  - limit
```
Q limit(int limit)
```
    Sets the retrieval limit for this query.
    When setting a limit, executing this query will only retrieve the specified number of relations. Note, that this also applies to counts.
    
    Parameters:
    
    limit - maximum number of relations to retrieve for this query
    
    Returns:
    
    this query
  - orderBy
```
Q orderBy(String key,
          org.apache.tinkerpop.gremlin.process.traversal.Order order)
```
    Orders the relation results of this query according to their property for the given key in the given order (increasing/decreasing).
    Note, that the ordering always applies to the incident relations (edges/properties) and NOT to the adjacent vertices even if only vertices are being returned.
    
    Parameters:
    
    key - The key of the properties on which to order
    
    order - the ordering direction
    
    Returns:

Interface BaseVertexQuery<Q extends BaseVertexQuery<Q>>

Method Summary

Method Detail

adjacent

types

types

labels

keys

direction

has

has

hasNot

hasNot

has

interval

limit

orderBy