org.vrspace.neurogrid
Class NGObject

java.lang.Object
  org.vrspace.neurogrid.NGObject

Direct Known Subclasses:

Event, EventType, Keyword, Node, Predicate, Uri, UriDesc, UriTriple, Weight

public abstract class NGObject

extends java.lang.Object

Generic import record.

See Also:

RecordParser

Field Summary

protected DBAdapter	db
protected long	db_id

Constructor Summary

protected

NGObject() Constructor intended for subclasses which use more atributes than id and name.

Method Summary

java.lang.String	deleteStatement() delete from tablename where db_id = this.db_id
java.util.Iterator	fieldIterator() Returns Iterator thru public fields.
protected java.util.Iterator	fieldIterator(java.lang.reflect.Field[] fields)
NGObject	fromText(java.io.Reader in)
java.lang.String	getID()
java.lang.String	getTable() Returns table name.
void	init() This initializes NGObject.
java.lang.String	insertStatement() insert into tablename (field,...) values (value,...)
abstract NGObject	next()
java.lang.String	nullify(java.lang.Object val)
java.lang.String	stringify(java.lang.Object val)
java.lang.String	stringify(java.lang.String name, java.lang.Object val)
java.lang.String	toString() Returns string containing id and name of this record
java.lang.String	toText()
java.lang.String	updateStatement() update tablename set field=value,...
protected void	verify() Check if exists in database, update in-memory db_id if so

Methods inherited from class java.lang.Object

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

Field Detail

db_id

protected long db_id

db

protected DBAdapter db

Constructor Detail

NGObject

protected NGObject()

Constructor intended for subclasses which use more atributes than id and name.

Method Detail

toString

public java.lang.String toString()

Returns string containing id and name of this record

init

public void init()

This initializes NGObject. Called when loads from the database, all field values are set. Used to construct whatever maps/sets this object belongs to. NOTE: this may not be necessary for NG, it's a bit more general model

getID

public java.lang.String getID()

fieldIterator

public java.util.Iterator fieldIterator()

Returns Iterator thru public fields. Iterator returns Map.Entry objects, key is Field, value is field value.

fieldIterator

protected java.util.Iterator fieldIterator(java.lang.reflect.Field[] fields)

nullify

public java.lang.String nullify(java.lang.Object val)

stringify

public java.lang.String stringify(java.lang.Object val)

stringify

public java.lang.String stringify(java.lang.String name,
                                  java.lang.Object val)

insertStatement

public java.lang.String insertStatement()

insert into tablename (field,...) values (value,...)

updateStatement

public java.lang.String updateStatement()

update tablename set field=value,... where db_id = this.db_id

deleteStatement

public java.lang.String deleteStatement()

delete from tablename where db_id = this.db_id

toText

public java.lang.String toText()

fromText

public NGObject fromText(java.io.Reader in)

getTable

public java.lang.String getTable()

Returns table name. Implement where one class maps to one table, field to field, otherwise override insert/update/deleteStatement()

See Also:

insertStatement(), updateStatement(), deleteStatement()

next

public abstract NGObject next()

verify

protected void verify()

Check if exists in database, update in-memory db_id if so