org.openanzo.common.rdb.layout
Interface INodeLayout<T extends org.openrdf.model.Value>

Type Parameters:

T - Type of Node this layout handles

All Known Implementing Classes:

NodeLayoutBase, NodeLayoutCacheProxy, NodeLiteralLayout, NodeURILayout, NodeXMLLiteralLayout

public interface INodeLayout<T extends org.openrdf.model.Value>

Provides read/write access to persisted nodes.

Author:

Joe Betz, Stephen Evanchik

Method Summary

T	convert(java.lang.String value, java.lang.Long modifier) Convert raw value from database into Node of appropriate type
java.lang.Long	fetchId(T n) Fetches a node's ID from the database
T	fetchValue(java.lang.Long id) Fetches a nodes value from the database based on its long identifier and NodeType.
NodeType	getType()
java.util.Map<java.lang.Long,T>	resolveStoredIds(java.util.Set<java.lang.Long> ids) This method will determine which IDs in a list of given Ids are already stored in the database.
java.util.Map<T,java.lang.Long>	resolveStoredNodes(java.util.Set<T> nodes, boolean storeUnresolvedNodes) This method will determine which nodes in a list of given nodes are already stored in the database.
java.lang.Long	store(T n) Stores a node in the database

Method Detail

store

java.lang.Long store(T n)

Stores a node in the database

Parameters:

n - The node to be stored

Returns:

The ID of the node stored

fetchId

java.lang.Long fetchId(T n)

Fetches a node's ID from the database

Parameters:

n - The node who's ID is to be found

Returns:

The ID of the node or null if not found

fetchValue

T fetchValue(java.lang.Long id)

Fetches a nodes value from the database based on its long identifier and NodeType.

Parameters:

id - The ID of the node to be found

Returns:

The node

resolveStoredNodes

java.util.Map<T,java.lang.Long> resolveStoredNodes(java.util.Set<T> nodes,
                                                   boolean storeUnresolvedNodes)

This method will determine which nodes in a list of given nodes are already stored in the database. If storeUnresolvedNodes is true, then any node that is unresolved will be stored.

Parameters:

nodes - The nodes which need to be resolved to whether they are already stored or need to be stored.

storeUnresolvedNodes - Store nodes that are not already stored

Returns:

A Map of the nodes already stored in the database.

resolveStoredIds

java.util.Map<java.lang.Long,T> resolveStoredIds(java.util.Set<java.lang.Long> ids)

This method will determine which IDs in a list of given Ids are already stored in the database.

Parameters:

ids - The ids which need to be resolved to whether they are already stored.

Returns:

A Map of the ids already stored in the database.

getType

NodeType getType()

Returns:

type of Nodes this layout handles

convert

T convert(java.lang.String value,
          java.lang.Long modifier)

Convert raw value from database into Node of appropriate type

Parameters:

value - raw value of node from database

modifier - for literal values

Returns:

converted Node of appropriate type