org.hypergraphdb.storage

Class HGStoreSubgraph

java.lang.Object

org.hypergraphdb.storage.HGStoreSubgraph

All Implemented Interfaces:

Iterable<Pair<HGPersistentHandle,Object>>, StorageGraph

public class HGStoreSubgraph
extends Object
implements StorageGraph

A StorageGraph bound to a HGStore. It's based on a set of root handles and its iterator will traverse the primitive storage graph starting from those roots.

Author:

Borislav Iordanov

Constructor Summary

Constructors

Constructor and Description
HGStoreSubgraph(HGHandle root, HGStore store) Construct a new HGStore based StorageGraph
HGStoreSubgraph(Set<HGHandle> roots, HGStore store) Construct a new HGStore based StorageGraph with multiple roots.

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	getData(HGPersistentHandle handle)
HGPersistentHandle[]	getLink(HGPersistentHandle handle)
Set<HGPersistentHandle>	getRoots() Return the set of root handles for this storage sub-graph.
Iterator<Pair<HGPersistentHandle,Object>>	iterator()
HGPersistentHandle	store(HGPersistentHandle handle, byte[] data)
HGPersistentHandle	store(HGPersistentHandle handle, HGPersistentHandle[] link)

Methods inherited from class java.lang.Object

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

Constructor Detail

HGStoreSubgraph

public HGStoreSubgraph(HGHandle root,
               HGStore store)

Construct a new HGStore based StorageGraph

Parameters:

root - A single root, starting point of the storage graph.

store - The backing store instance.

HGStoreSubgraph

public HGStoreSubgraph(Set<HGHandle> roots,
               HGStore store)

Construct a new HGStore based StorageGraph with multiple roots.

Parameters:

root - A single root, starting point of the storage graph.

store - The backing store instance.

Method Detail

getData

public byte[] getData(HGPersistentHandle handle)

Specified by:

getData in interface StorageGraph

getLink

public HGPersistentHandle[] getLink(HGPersistentHandle handle)

Specified by:

getLink in interface StorageGraph

store

public HGPersistentHandle store(HGPersistentHandle handle,
                       HGPersistentHandle[] link)

Specified by:

store in interface StorageGraph

store

public HGPersistentHandle store(HGPersistentHandle handle,
                       byte[] data)

Specified by:

store in interface StorageGraph

getRoots

public Set<HGPersistentHandle> getRoots()

Description copied from interface: StorageGraph

Return the set of root handles for this storage sub-graph.

Specified by:

getRoots in interface StorageGraph

iterator

public Iterator<Pair<HGPersistentHandle,Object>> iterator()

Specified by:

iterator in interface Iterable<Pair<HGPersistentHandle,Object>>

Specified by:

iterator in interface StorageGraph