DBLP database DBLP Web Site & Search Pages User Query Info n User Knowledge Info1 Info2 1. 2. 3

DBLPdatabase

DBLPWeb Site

& Search Pages

User Query

Info n

UserKnowledgeInfo1Info2

1.

2.

3.

DBLPdatabase

MultipleAuthorsList Page

(Unique Author

Data Page)

Multiple AuthorsList Page

Hyperlinks to individual data pages

Main Author

Home Page

Table Data

DBLPdatabase

MultipleAuthorsList Page

(Unique Author

Data Page)

Unique AuthorData Page

Overview of the Java SQL Wrapper Class

SQL String

1. User inputs

SQL Parser

SigmodAuthor & Title

Search Web pages

HTMLAuthor &

Title Parsers

Oracle

<HTML>…(Single Title)<TD>data…data</TD>

...</HTML>

<HTML>…(Single Title)<TD>data…

data</TD … … >...</HTML>







(Store Articles Method)2. Send SQL Method Builds a database for the query in Oracle

3. Query sent to Oracle

A

B

C

(QueryDB Method)D

SQL Parser

<SUBMIT> Name = AliceThis_String_Skipped

<SUBMIT> Title = Ways to..This_String_SkippedThis_String_Skipped

Alice

Ways to..

<SUMIT> Name = Alice

SigmodAuthorSearchpage

SigmodTitle

Searchpage

The SQL Query is parsed, and requests for Author and Title views are sent to the respective web pages.

The web pages return streams of HTML which are then parsed to extract the data.

A

(HTML to Parsers)(SQL from user)


SigmodTitle

Searchpage

Single Authoror

List Page


...</HTML>

ParseTitle

ParseAuthor

ParseList

The HTML returned from querying Search Author depends on whether the

requested name is unique in the database.

If it is unique, an HTML page with data about that author is returned. Otherwise a

list of hyperlinks to matching author names is returned.

Parse List determines what kind of page has been returned then if it is a list page,

extracts each of the author URLs and returns a vector of input streams to each of

those authors pages.

(to Oracle DB)

(Keyword queries

from SQL Parser)

(Zoom)

B.1

Multiple Author List page


<HTML>…

<LI> Author1</LI><LI>Author2</LI>

...</HTML>

<HTML>…(Single Author)

<TD>data…data</TD>

...</HTML>

ParseAuthor

ParseList

Author1

Author2

Author3

Single Author Data page

<HTML>…(Single Author)


...</HTML>

ParseList

Vectorof

Authors

<HTML>…(Single Author1)


...</HTML>



...</HTML>



...</HTML>

ParseAuthor

OR

SigmodTitle

Searchpage


...</HTML>

ParseTitle

B.2

ParseAuthor

ParseTitle

Title:

Public:

Page:

Results Vector:Tags & Values

Author:

Author:

Author:

Results Vector:Tags & Values

Alice Kent

Joe Stevens

Kim Lee

Databases

ICDE 1999

287

Oracle

Store Articles Method

“Insert into author values

(automatic id, ?, ?)”

“Insert into rel values

(select author_id..)”

“Insert into articlevalues

(automatic id, ?, ?, ?)”

Prepared Piped SQL Statements

(Query Oracle for Author & Article IDs)

C

RMI

SQLWrapper ClassClient Browser

Java Applet

Original SQL String Oracle

...connection.prepareStatement (SQL);

...rs = stmt.executeQuery ();

QueryDB Method

//*iterates through records in rs to build a String [ ][ ]

containing the resulting data*//

AuthID Name

Alice..87219Joe Sl..53882

D QueryDB Method

Overview of the Java SQL Wrapper Class

SQL String

1. User inputs

SQL Parser

SigmodAuthor & Title

Search Web pages

HTMLAuthor &

Title Parsers

Oracle


...</HTML>









(Store Articles Method)2. Send SQL Method Builds a database for the query in Oracle

3. Query sent to Oracle

A

B

C

(QueryDB Method)D

ParseAuthor.jjt

ParseList.java

Oracle

Client Browser

Java Applet

WrapperExp.html<HTML>….

…...

...</HTML>

DBDescript.html<HTML>….

…...

...</HTML>

Personal Web Server(Scarlet.wpi.edu)

Index.html<HTML>….

…...

...</HTML>

Java Server

RMI

HTTP

SQLWrapper.java

..sendSQL()

..queryDB()

Project Architecture Overview

The Wra

pper C

lass

The Diner

(Client

Application)

The Head Chef(Server

Application)

Dining Guide(Registry)

Servants & Waiters(Rmic Stubs & Skeletons)

The Menu(Interface)

Intuitive RMI

Naming.lookup(what restaurants) Reg.rebind(“CatchyName”, myRestaurant)

(Implements)

RMI Nitty-Gritties (or: Write--Compile--Run)

Html & Java Source Files(4):*Remote Interface

*Remote Object Server *Client Applet

*HTML page to load Applet

-Be Public -Extend java.rmi.Remote -Throw java.rmi.RemoteException

Must:

-Be Serializable -Implement 1(+) Remote Interfaces -Extend java.rmi.UnicastRemoteObject

(or export object explicitly) -Create & install a Security Manager -Create & Register 1(+) Remote Object


From Command Line:

Javac myRestaurant.java

Rmic myRestaurantGenerates Stubs

& Skeletons

Compiles Source Codeto Create Executable

Class Files


From Command Line:

Start RmiRegistry [port#]

Java myRestaurant

Load Applet in Browser

Starts Registry on port#or 1099 by default

Runs Java Server application

Cookies

import netscape.javascript.*;init(){

QueryApplet.java

Index.html<HTML>…

<HEAD> javaScript Function setCookie Function getCookie Function delCookie

Function returnTime</HEAD>

…<Applet code=QueryApplet.class

... MAYSCRIPT></Applet>

...</HTML>

QueryServer.java

saveToList(string cookie..)…

deleteFunction (string cookie..)...

getSavedList (string cookie..)...

RMI

ClientQueries(Folder)

JSObjectmethod calls

Cookie1.txt

Cookie2.txt

Cookie3.txt

CookieCode.……….….…..CookieCode

…}

LocalFile I/O

String cookie;try {cookie = InetAddress.getLocalHost().toString();}

catch(UnknownHostException uhe){cookie = "Unknown Host";} if ( cookie.indexOf("/") != -1 )

cookie = cookie.substring(0, cookie.indexOf('/'));

JSObject win = JSObject.getWindow(this); JSObject doc = (JSObject) win.getMember("document");

Object [] Arg = {"client"}; String ClientCookie = (String) win.call("getCookie", Arg);

if (ClientCookie.equals("undefined")) { String time = (String) win.call("returnTime", null);

int begin = time.indexOf(',') + 1; int end = time.indexOf('U')-1;

time = time.substring(begin, end); time = time.replace(' ', '_'); time = time.replace(':', '_');

time = cookie + time; Object [] Args = {"client", time , new Integer(30)};

win.call("setCookie", Args); cookie = (String) win.call("getCookie", Arg); }

else {cookie = ClientCookie;

Cookie CodeCookie String (Applet Global Variable)

= local_host_name (from static method) + TimeStamp (from JavaScript returnTime )

Swing Tables

JTable

JComponent TableModelListener

TableColumnModelListener

ListSelectionListener

TableModel

AbstractTableModel

DefaultTableModelCustomModel

ListSelectionModel

DefaultListSelectionModel

TableColumnModel

DefaultTableColumnModel

The End

Documents

DBLP database DBLP Web Site & Search Pages User Query Info n User Knowledge Info1 Info2 1. 2. 3