spo.src.SPDB.DocumentImpl
Class Handler

java.lang.Object
  |
  +--spo.src.SPDB.DocumentImpl.Handler

public class Handler

extends java.lang.Object

A class which gets requests from the server program and calls the SPO core to resolve those requests

Field Summary

(package private) DBUtil	dbutil
(package private) Relation	relation

Constructor Summary

Handler(java.sql.Connection conn)
Initialize an instance of the class

Method Summary

java.lang.String	getRelNames() Get the names of relations in the database
int	getRelSize() Get the number of SPOs in the relation
int	handleCreate(java.lang.String relName, java.lang.String schemaURL) Call the SPO core to handle the relation creation
int	handleDelete(java.lang.String[] where, java.lang.String relName) Call the SPO core to handle the SPO deletion
int	handleDrop(java.lang.String relName) Call the SPO core to handle the relation drop
int	handleInsert(java.io.BufferedReader br, java.lang.String relName) Call the SPO core to handle the SPO insertion
java.lang.String	handleSQuery(java.util.Vector parsedQuery) Call the SPO core to handle structured queries

Methods inherited from class java.lang.Object

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

Field Detail

dbutil

DBUtil dbutil

relation

Relation relation

Constructor Detail

Handler

public Handler(java.sql.Connection conn)

Initialize an instance of the class

Parameters:

conn - A SQL Connection object

Method Detail

handleCreate

public int handleCreate(java.lang.String relName,
                        java.lang.String schemaURL)

Call the SPO core to handle the relation creation

Parameters:

relName - name of the relation

schemaURL - URL name of the schema

handleDrop

public int handleDrop(java.lang.String relName)

Call the SPO core to handle the relation drop

Parameters:

relName - name of the relation

handleInsert

public int handleInsert(java.io.BufferedReader br,
                        java.lang.String relName)

Call the SPO core to handle the SPO insertion

Parameters:

br - A BufferedReader object

relName - name of the relation

handleDelete

public int handleDelete(java.lang.String[] where,
                        java.lang.String relName)

Call the SPO core to handle the SPO deletion

Parameters:

where - the where condition clause

relName - name of the relation

handleSQuery

public java.lang.String handleSQuery(java.util.Vector parsedQuery)

Call the SPO core to handle structured queries

Parameters:

parsedQuery - the structred query in Vector format

getRelSize

public int getRelSize()

Get the number of SPOs in the relation

getRelNames

public java.lang.String getRelNames()

Get the names of relations in the database