org.openanzo.common.rdb.layout
Class NodeLiteralLayout

java.lang.Object
  org.openanzo.common.rdb.layout.NodeLayoutBase<org.openrdf.model.Literal>
      org.openanzo.common.rdb.layout.NodeLiteralLayout

All Implemented Interfaces:

INodeLayout<org.openrdf.model.Literal>

public class NodeLiteralLayout
extends NodeLayoutBase<org.openrdf.model.Literal>

Layout for Node_Literal type. Based on NodeLayoutBase which enables long node support and aggregates two ValueLayouts for literal datatype and language support.

Author:

Joe Betz, Stephen Evanchik

Constructor Summary

NodeLiteralLayout(LiteralIndexer literalIndexer, SQLCache sqlCache, Sequence sequence, java.lang.String sequenceName, java.lang.String longSequenceName, java.lang.String tableName, java.lang.String longTableName, java.lang.String resourceTempTableName, java.lang.String idTempTableName, int maxLength, java.lang.String optimizationString, IValueLayout datatypeLayout, IValueLayout languageLayout, NodeCentricSchema.LiteralNode literalSchema, NodeCentricSchema.LongLiteralNode longLiteralSchema)
Create a new NodeLiteralLayout

Method Summary

org.openrdf.model.Literal	convert(java.lang.String valueIn, java.lang.Long modifierId) Convert raw value from database into Node of appropriate type
java.lang.Long	fetchId(org.openrdf.model.Literal literal) Fetches a node's ID from the database
org.openrdf.model.Literal	fetchValue(java.lang.Long id) Fetches a nodes value from the database based on its long identifier and NodeType.
NodeType	getType()
boolean	isLong(org.openrdf.model.Literal n) Determines whether or not a node is 'long'
java.util.Map<java.lang.Long,org.openrdf.model.Literal>	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<org.openrdf.model.Literal,java.lang.Long>	resolveStoredNodes(java.util.Set<org.openrdf.model.Literal> 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(org.openrdf.model.Literal literal) Stores a node in the database

Methods inherited from class org.openanzo.common.rdb.layout.NodeLayoutBase

getLongSequenceName, getSequenceName

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeLiteralLayout

public NodeLiteralLayout(LiteralIndexer literalIndexer,
                         SQLCache sqlCache,
                         Sequence sequence,
                         java.lang.String sequenceName,
                         java.lang.String longSequenceName,
                         java.lang.String tableName,
                         java.lang.String longTableName,
                         java.lang.String resourceTempTableName,
                         java.lang.String idTempTableName,
                         int maxLength,
                         java.lang.String optimizationString,
                         IValueLayout datatypeLayout,
                         IValueLayout languageLayout,
                         NodeCentricSchema.LiteralNode literalSchema,
                         NodeCentricSchema.LongLiteralNode longLiteralSchema)

Create a new NodeLiteralLayout

Parameters:

literalIndexer - Optional literal indexer

sqlCache - SQLCache from underlying connection

sequence - Sequence for getting IDs for literals

sequenceName - Name of sequence for getting IDs for literals

longSequenceName - Name of sequence for getting IDs for long literals

tableName - Name of table where literals are stored

longTableName - Name of table where long literals are stored

resourceTempTableName - Name of temporary table used during insertion and resolving of ids

idTempTableName - Name of temporary table used to resolve values

maxLength - The maximum length of a node's string representation before it is considered long

optimizationString - Extra parameters added to queries for database specific optimizations

datatypeLayout - The layout that contains Datatype data

languageLayout - The layout that contains Language data

literalSchema - Schema for literals

longLiteralSchema - Schema for long literals

Method Detail

store

public java.lang.Long store(org.openrdf.model.Literal literal)

Description copied from interface: INodeLayout

Stores a node in the database

Parameters:

literal - The node to be stored

Returns:

The ID of the node stored

isLong

public boolean isLong(org.openrdf.model.Literal n)

Description copied from class: NodeLayoutBase

Determines whether or not a node is 'long'

Overrides:

isLong in class NodeLayoutBase<org.openrdf.model.Literal>

Parameters:

n - The node to test

Returns:

true if the node is a long node, false otherwise

fetchValue

public org.openrdf.model.Literal fetchValue(java.lang.Long id)

Description copied from interface: INodeLayout

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

convert

public org.openrdf.model.Literal convert(java.lang.String valueIn,
                                         java.lang.Long modifierId)

Description copied from interface: INodeLayout

Convert raw value from database into Node of appropriate type

Parameters:

valueIn - raw value of node from database

modifierId - for literal values

Returns:

converted Node of appropriate type

fetchId

public java.lang.Long fetchId(org.openrdf.model.Literal literal)

Description copied from interface: INodeLayout

Fetches a node's ID from the database

Specified by:

fetchId in interface INodeLayout<org.openrdf.model.Literal>

Overrides:

fetchId in class NodeLayoutBase<org.openrdf.model.Literal>

Parameters:

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

Returns:

The ID of the node or null if not found

getType

public NodeType getType()

Returns:

type of Nodes this layout handles

resolveStoredIds

public java.util.Map<java.lang.Long,org.openrdf.model.Literal> resolveStoredIds(java.util.Set<java.lang.Long> ids)

Description copied from interface: INodeLayout

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.

resolveStoredNodes

public java.util.Map<org.openrdf.model.Literal,java.lang.Long> resolveStoredNodes(java.util.Set<org.openrdf.model.Literal> nodes,
                                                                                  boolean storeUnresolvedNodes)

Description copied from interface: INodeLayout

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.