All Superinterfaces:

C8SerializationAccessor

All Known Implementing Classes:

C8GraphImpl
```
public interface C8Graph
extends C8SerializationAccessor
```
Interface for operations on C8DB graph level.

See Also:

API Documentation

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`GraphEntity`	`addEdgeDefinition(EdgeDefinition definition)`	Adds the given edge definition to the graph.
`GraphEntity`	`addVertexCollection(String name)`	Adds a vertex collection to the set of collections of the graph.
`GraphEntity`	`create(Collection<EdgeDefinition> edgeDefinitions)`	Creates the graph in the graph module.
`GraphEntity`	`create(Collection<EdgeDefinition> edgeDefinitions, GraphCreateOptions options)`	Creates the graph in the graph module.
`C8Database`	`db()`	The the handler of the database the named graph is within
`void`	`drop()`	Deletes the graph from the database.
`void`	`drop(boolean dropCollections)`	Deletes the graph from the database.
`C8EdgeCollection`	`edgeCollection(String name)`	Returns a `ArangoEdgeCollection` instance for the given edge collection name.
`boolean`	`exists()`	Checks whether the graph exists
`Collection<String>`	`getEdgeDefinitions()`	Fetches all edge collections from the graph and returns a list of collection names.
`GraphEntity`	`getInfo()`	Retrieves general information about the graph.
`Collection<String>`	`getVertexCollections()`	Fetches all vertex collections from the graph and returns a list of collection names.
`String`	`name()`	The name of the graph
`GraphEntity`	`removeEdgeDefinition(String definitionName)`	Remove one edge definition from the graph.
`GraphEntity`	`replaceEdgeDefinition(EdgeDefinition definition)`	Change one specific edge definition.
`C8VertexCollection`	`vertexCollection(String name)`	Returns a `ArangoVertexCollection` instance for the given vertex collection name.

Methods inherited from interface com.c8db.C8SerializationAccessor
util, util

- Method Detail
  - db
```
C8Database db()
```
    The the handler of the database the named graph is within
    
    Returns:
    
    database handler
  - name
```
String name()
```
    The name of the graph
    
    Returns:
    
    graph name
  - exists
```
boolean exists()
        throws C8DBException
```
    Checks whether the graph exists
    
    Returns:
    
    true if the graph exists, otherwise false
    
    Throws:
    
    C8DBException
  - create
```
GraphEntity create(Collection<EdgeDefinition> edgeDefinitions)
            throws C8DBException
```
    Creates the graph in the graph module. The creation of a graph requires the name of the graph and a definition of its edges.
    
    Parameters:
    
    edgeDefinitions - An array of definitions for the edge
    
    Returns:
    
    information about the graph
    
    Throws:
    
    C8DBException
    
    See Also:
    
    API Documentation
  - create
```
GraphEntity create(Collection<EdgeDefinition> edgeDefinitions,
                   GraphCreateOptions options)
            throws C8DBException
```
    Creates the graph in the graph module. The creation of a graph requires the name of the graph and a definition of its edges.
    
    Parameters:
    
    edgeDefinitions - An array of definitions for the edge
    
    options - Additional options, can be null
    
    Returns:
    
    information about the graph
    
    Throws:
    
    C8DBException
    
    See Also:
    
    API Documentation
  - drop
```
void drop()
   throws C8DBException
```
    Deletes the graph from the database.
    
    Throws:
    
    C8DBException
    
    See Also:
    
    API Documentation
  - drop
```
void drop(boolean dropCollections)
   throws C8DBException
```
    Deletes the graph from the database.
    
    Parameters:
    
    dropCollections - Drop collections of this graph as well. Collections will only be dropped if they are not used in other graphs.
    
    Throws:
    
    C8DBException
    
    See Also:
    
    API Documentation
  - getInfo
```
GraphEntity getInfo()
             throws C8DBException
```
    Retrieves general information about the graph.
    
    Returns:
    
    the definition content of this graph
    
    Throws:
    
    C8DBException
    
    See Also:
    
    API Documentation
  - getVertexCollections
```
Collection<String> getVertexCollections()
                                 throws C8DBException
```
    Fetches all vertex collections from the graph and returns a list of collection names.
    
    Returns:
    
    all vertex collections within this graph
    
    Throws:
    
    C8DBException
    
    See Also:
    
    API Documentation
  - addVertexCollection
```
GraphEntity addVertexCollection(String name)
                         throws C8DBException
```
    Adds a vertex collection to the set of collections of the graph. If the collection does not exist, it will be created.
    
    Parameters:
    
    name - Name of the vertex collection
    
    Returns:
    
    information about the graph
    
    Throws:
    
    C8DBException
    
    See Also:
    
    API Documentation
  - vertexCollection
```
C8VertexCollection vertexCollection(String name)
```
    Returns a ArangoVertexCollection instance for the given vertex collection name.
    
    Parameters:
    
    name - Name of the vertex collection
    
    Returns:
    
    collection handler
  - edgeCollection
```
C8EdgeCollection edgeCollection(String name)
```
    Returns a ArangoEdgeCollection instance for the given edge collection name.
    
    Parameters:
    
    name - Name of the edge collection
    
    Returns:
    
    collection handler
  - getEdgeDefinitions
```
Collection<String> getEdgeDefinitions()
                               throws C8DBException
```
    Fetches all edge collections from the graph and returns a list of collection names.
    
    Returns:
    
    all edge collections within this graph
    
    Throws:
    
    C8DBException
    
    See Also:
    
    API Documentation
  - addEdgeDefinition
```
GraphEntity addEdgeDefinition(EdgeDefinition definition)
                       throws C8DBException
```
    Adds the given edge definition to the graph.
    
    Parameters:
    
    definition - The edge definition
    
    Returns:
    
    information about the graph
    
    Throws:
    
    C8DBException
    
    See Also:
    
    API Documentation
  - replaceEdgeDefinition
```
GraphEntity replaceEdgeDefinition(EdgeDefinition definition)
                           throws C8DBException
```
    Change one specific edge definition. This will modify all occurrences of this definition in all graphs known to your database
    
    Parameters:
    
    definition - The edge definition
    
    Returns:
    
    information about the graph
    
    Throws:
    
    C8DBException
    
    See Also:
    
    API Documentation
  - removeEdgeDefinition
```
GraphEntity removeEdgeDefinition(String definitionName)
                          throws C8DBException
```
    Remove one edge definition from the graph. This will only remove the edge collection, the vertex collections remain untouched and can still be used in your queries
    
    Parameters:
    
    definitionName - The name of the edge collection used in the definition
    
    Returns:
    
    information about the graph
    
    Throws:
    
    C8DBException
    
    See Also:
    
    API Documentation

Interface C8Graph

Method Summary

Methods inherited from interface com.c8db.C8SerializationAccessor

Method Detail

db

name

exists

create

create

drop

drop

getInfo

getVertexCollections

addVertexCollection

vertexCollection

edgeCollection

getEdgeDefinitions

addEdgeDefinition

replaceEdgeDefinition

removeEdgeDefinition