org.xerial.db.model
Class DataModel

java.lang.Object
  org.xerial.db.model.DataModel

public class DataModel
extends Object

A DataModel manages the graph structure of an ER-diagram. person:(id, name, address) || author:(book_id, author_id) |* |1 book:(r2:id, r2:title) || order:(id, book_id, customer_id, info) || customer:(id, name, address, phone) query examples (person:name, book:title = "Gone with the wind") (book:id = 10, customer:name, order:info) select customer:id, customer:name, count(*) from (select customer left join order on customer:id = order:customer_id) Multidimensional Hash Table can support this type of query?

Author:

leo

Constructor Summary

DataModel()

Method Summary

void	addNode(String nodeName)
void	addRelation(Relation relation)
void	attachSQLiteDatabase(String sqliteDBFile)
void	connectNodes(String sourceNodeName, String destNodeName, Relationship rel)
boolean	contains(String nodeName)
List<String>	destinationOf(String nodeName)
Relationship	getRelationship(String src, String dest)
Set<String>	getRootNodeNameSet()
boolean	hasEdge(String src, String dest)
boolean	hasPath(String src, String dest)
void	load(SQLiteAccess query)
List<String>	path(String src, String dest)
void	save(SQLiteAccess query)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

DataModel

public DataModel()

Method Detail

addNode

public void addNode(String nodeName)

contains

public boolean contains(String nodeName)

connectNodes

public void connectNodes(String sourceNodeName,
                         String destNodeName,
                         Relationship rel)
                  throws DBException

Throws:

DBException

getRootNodeNameSet

public Set<String> getRootNodeNameSet()

destinationOf

public List<String> destinationOf(String nodeName)

path

public List<String> path(String src,
                         String dest)

hasPath

public boolean hasPath(String src,
                       String dest)

save

public void save(SQLiteAccess query)
          throws DBException

Throws:

DBException

load

public void load(SQLiteAccess query)
          throws DBException

Throws:

DBException

toString

public String toString()

Overrides:

toString in class Object

attachSQLiteDatabase

public void attachSQLiteDatabase(String sqliteDBFile)
                          throws DBException

Throws:

DBException

addRelation

public void addRelation(Relation relation)

hasEdge

public boolean hasEdge(String src,
                       String dest)

getRelationship

public Relationship getRelationship(String src,
                                    String dest)