oracle.pgx.api.subgraph

Class GenericSubgraphReader

java.lang.Object

oracle.pgx.api.subgraph.AbstractSubgraphReader<GenericSubgraphReader>

oracle.pgx.api.subgraph.GenericSubgraphReader

public class GenericSubgraphReader
extends AbstractSubgraphReader<GenericSubgraphReader>

Entry point for subgraph reading. This reader does not support any operation by itself. To use the initial subgraph reading feature, specify a source. You may, for example, use fromPgView(String) to start configuring a reading operation from PG Views, using some PGQL queries.

Constructor Summary

Constructors

Constructor and Description
GenericSubgraphReader(PgxSession session, oracle.pgx.api.internal.Core core, java.util.function.Function<GraphConfig,PgxFuture<PgxGraph>> readFunction) Create an instance of this generic reader.

Method Summary

Modifier and Type	Method and Description
PgViewSubgraphReader	fromPgView(java.lang.String viewName) Read a subgraph from PG Views, using a set of PGQL queries.
PgxFuture<PgxGraph>	loadAsync() Load the subgraph.

Methods inherited from class oracle.pgx.api.subgraph.AbstractSubgraphReader

load

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GenericSubgraphReader

public GenericSubgraphReader(PgxSession session,
                             oracle.pgx.api.internal.Core core,
                             java.util.function.Function<GraphConfig,PgxFuture<PgxGraph>> readFunction)

Create an instance of this generic reader. Do not use this constructor, use PgxSession.readSubgraph() to acquire an instance instead.

Parameters:

session - The session for the read operation.

core - The core API.

readFunction - A function used to read the actual subgraph.

Method Detail

fromPgView

public PgViewSubgraphReader fromPgView(java.lang.String viewName)

Read a subgraph from PG Views, using a set of PGQL queries.

Parameters:

viewName - The name of the view in the database.

Returns:

A config builder for the read operation.

loadAsync

public PgxFuture<PgxGraph> loadAsync()

Description copied from class: AbstractSubgraphReader

Load the subgraph.

Specified by:

loadAsync in class AbstractSubgraphReader<GenericSubgraphReader>

Returns:

The subgraph.