Package hydra.pg

Class Merging

java.lang.Object

hydra.pg.Merging

public class Merging
extends java.lang.Object

Utilities for combining multiple vertex or edge types into a single "merged" vertex or edge type, and correspondingly encoding and decoding vertices and edges of these types.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Merging.IdAdapters<T,V>	A helper object which defines merged vertex and edge id types, and a value coder for each vertex and edge label.

Field Summary

Fields

Modifier and Type	Field	Description
static EdgeLabel	DEFAULT_EDGE_LABEL
static VertexLabel	DEFAULT_VERTEX_LABEL
static Merging.IdAdapters<LiteralType,Literal>	STRING_ID_ADAPTERS

Constructor Summary

Constructors

Constructor	Description
Merging()

Method Summary

Modifier and Type	Method	Description
static <T,V> Flow<Unit,StatelessAdapter<java.util.List<EdgeType<T>>,EdgeType<T>,Edge<V>,Edge<V>>>	createEdgeAdapter(java.util.List<EdgeType<T>> types, Merging.IdAdapters<T,V> idAdapters, boolean unifyIdenticalTypes)	Create an edge adapter based on a list of edge types and given id adapters.
static <T,V> Flow<Unit,StatelessAdapter<java.util.List<VertexType<T>>,VertexType<T>,Vertex<V>,Vertex<V>>>	createVertexAdapter(java.util.List<VertexType<T>> types, Merging.IdAdapters<T,V> idAdapters, boolean unifyIdenticalTypes)	Create a vertex adapter based on a list of vertex types and given id adapters.
static <T,V> Merging.IdAdapters<T,V>	stringIdAdapters(T stringType, java.util.function.Function<V,Flow<Unit,java.lang.String>> fromLiteral, java.util.function.Function<java.lang.String,V> toLiteral)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_VERTEX_LABEL

public static VertexLabel DEFAULT_VERTEX_LABEL

DEFAULT_EDGE_LABEL

public static EdgeLabel DEFAULT_EDGE_LABEL

STRING_ID_ADAPTERS

public static final Merging.IdAdapters<LiteralType,Literal> STRING_ID_ADAPTERS

Constructor Detail

Merging

public Merging()

Method Detail

createVertexAdapter

public static <T,V> Flow<Unit,StatelessAdapter<java.util.List<VertexType<T>>,VertexType<T>,Vertex<V>,Vertex<V>>> createVertexAdapter(java.util.List<VertexType<T>> types,
                                                                                                                                                                   Merging.IdAdapters<T,V> idAdapters,
                                                                                                                                                                   boolean unifyIdenticalTypes)

Create a vertex adapter based on a list of vertex types and given id adapters.

createEdgeAdapter

public static <T,V> Flow<Unit,StatelessAdapter<java.util.List<EdgeType<T>>,EdgeType<T>,Edge<V>,Edge<V>>> createEdgeAdapter(java.util.List<EdgeType<T>> types,
                                                                                                                                                         Merging.IdAdapters<T,V> idAdapters,
                                                                                                                                                         boolean unifyIdenticalTypes)

Create an edge adapter based on a list of edge types and given id adapters.

stringIdAdapters

public static <T,V> Merging.IdAdapters<T,V> stringIdAdapters(T stringType,
                                                                         java.util.function.Function<V,Flow<Unit,java.lang.String>> fromLiteral,
                                                                         java.util.function.Function<java.lang.String,V> toLiteral)