Transcript Powerpoint - JudoScript

Introduction To JudoScript
A Powerful, Intuitive,
All-In-One Scripting Tool
James J.B. Huang
Copyright 2005 James J.B. Huang
1
Perlis's Postulate
The computing field is always
in need of new clichés.
Copyright 2005 James J.B. Huang
2
About the Author
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Academic experience
Industry experience
Invented two language tools:

JudoScript – an all-in-one scripting tool
http://www.judoscript.com/judo.html

Jamaica – the JVM Macro Assembly Language
http://www.judoscript.com/jamaica.html
Copyright 2005 James J.B. Huang
3
How to Use The Slides
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The slides here can be used for presentation
and/or learning JudoScript.
Presentations won't cover all slides.
The first part provides one way of understanding
JudoScript, its idea and vision.
The second part lists most of the key language
features. You may pick and view whatever you
are interested in.
The last part presents some general language
discussion. It may be interesting but is not
important.
Copyright 2005 James J.B. Huang
4
About This Presentation
I.
II.
III.
Vision and JudoScript Design
JudoScript Strengths
Language Design Discussion
Copyright 2005 James J.B. Huang
5
I. Vision and JudoScript Design
I.
II.
III.
Vision and JudoScript Design
JudoScript Strengths
Language Design Discussion
Copyright 2005 James J.B. Huang
6
What's the Problem?
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We use many scripting tools for a task: e.g.
Ant, shell scripts, Perl/Python, SQL scripts,
even Java or C programs.
Common belief: "different tools have
different strengths for the job."
BUT, why those strengths have to scatter
across different scripting tools in the 21st
century?
Copyright 2005 James J.B. Huang
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The Vision
Imagine
ONE SCRIPTING TOOL
with all those strengths and beyond …
Copyright 2005 James J.B. Huang
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Benefits of One-Tool-For-All
1.
Single mind — synergy
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2.
3.
4.
5.
6.
No context switching from tool to tool
No data passing from tool to tool
1 + 1 > 2 — Gestalt
Single install and configuration
Productivity
Maintainability
Lower stress level
Copyright 2005 James J.B. Huang
9
Vocabulary: synergy
Mutually advantageous conjunction or
compatibility of distinct business participants
or elements.
— Merrian-Webster
"Coherence."
— James Huang
Copyright 2005 James J.B. Huang
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Vocabulary: Gestalt
Something so integrated as to constitute a
functional unit with properties not derivable
by summation of its parts.
— Merrian-Webster
"Chemistry."
— James Huang
Copyright 2005 James J.B. Huang
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Is this Vision Feasible?
POSITIVE!
Because we know what we need.
Copyright 2005 James J.B. Huang
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What Do We Need Today?
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RDBMS processing and reporting
Common data formats, e.g. SGML, XML
Work with file systems and archives
such as zip, tar and gzip
Run executables in various ways
Network clients, e.g. e-mail, WSDL,
HTTP, etc.
(to be continued)
Copyright 2005 James J.B. Huang
13
What Do We Need Today?

cont'd
Script popular resources such as Ant Tasks and
Hibernate
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Create and use Graphical User Interfaces
Script Java resources
Script Windows resources including
COM/ActiveX
Algorithmic and O-O programming
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Having all these together!
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Copyright 2005 James J.B. Huang
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The Ambitions
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JudoScript is an attempt for such an allin-one scripting tool in the 21st century.
It should excel in these strengths, including
programming.
Some features are really specialized tools,
such as a universal RDBMS scripting client,
SGML scraper, files and archives tools, etc.
It shall be as easy and intuitive as possible.
Copyright 2005 James J.B. Huang
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Is JudoScript the 1st Such Attempt?
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Perl was intended for similar goals.
Perl [V1:V5]=>[1987, 88, 89, 91, 94].
The idea behind Perl: "Perl is designed to make
the easy jobs easy, without making the hard jobs
impossible."
"And what are these 'easy jobs'? The ones you do
everyday. You want a language that makes it easy to manipulate
numbers and text, files and directories, computers and networks, and
especially programs." Programming Perl Edition 2 (Covers
Perl 5),
ISBN: 1-56592-149-6
Copyright 2005 James J.B. Huang
16
The Perl 6 Vision
"The vision for Perl 6 is more than simply a rewrite
of Perl 5. By separating the parsing from the
compilation and the runtime, we're opening the
doors for multiple languages to cooperate. You'll be
able to write your program in Perl 6, Perl 5, TCL,
Python, or any other language that there's a parser
written for. Interchangeable runtime engines let you
interpret your byte-code or convert it to something
else (e.g., Java, C, or even back to Perl)."
Copyright 2005 James J.B. Huang
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The JudoScript Design Goals
1.
2.
3.
4.
Useful, powerful
Easy, intuitive
Contemporary
Comprehensive, progressive
Copyright 2005 James J.B. Huang
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High-Level Requirements
1.
2.
3.
Provide all the mentioned strengths
Easy to read, write and maintain
NOT to re-invent programming ̶ uses
JavaScript as its base syntax
4.
Strong programming support
Copyright 2005 James J.B. Huang
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Language Features (Domain Support)
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Powerful algorithmic and OO programming/scripting
Potent Java scripting
SQL scripting
SGML and XML scripting
I/O and logging
File system and archive
Run executables
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Hibernate scripting
Windows COM scripting
WSDL scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
These are language features, not library features.
Copyright 2005 James J.B. Huang
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Some Quick Code Samples [I]
copy ‘*.java’
in ‘src.jar’
recursive
to ‘c:/tmp/src’;
listFiles
‘*.java,*.properties’
in ‘src.jar’
recursive; // result in $_
copy ‘*.java’
except ‘*/save/*’
in ‘c:/tmp/src’
recursive
into ‘src.jar’;
do ‘com/judoscript/RT.java’
in ‘src.jar’ as lines
{
lineNo = loopIndex()+1;
println lineNo:>3,‘: ‘,$_;
}
Copyright 2005 James J.B. Huang
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Some Quick Code Samples [II]
mail::send
from: ‘[email protected]’
to: ‘[email protected], [email protected]’
cc: ‘[email protected]’
subject: ‘Test test’
attach: ‘judo.jar, src.jar’
body: [[*
This is a test!
*]];
htmlBody: [[*
This is a
<u>test</u>!
*]];
do 'index.html' as sgml {
<a>: println $_.href;
<img>: println $_.src;
}
do $$local as xml {
<book>:
println $_.author;
</book>:
println '-------';
<title>TEXT: println $_;
}
EndScript ===================
<book author="Dan Brown">
<title>Da Vinci Code</title>
</book>
Copyright 2005 James J.B. Huang
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Some Quick Code Samples [III]
db::sql {
INSERT INTO emp(num,name) VALUES(101,'James');
INSERT INTO emp(num,name) VALUES(102,'Daniel');
}
db::batch {
INSERT INTO emp(num,name) VALUES(103,'Lisa');
INSERT INTO emp(num,name) VALUES(104,'Mary');
}
db::query qry:
SELECT name, bday FROM emp WHERE bday>?
; with @1:date = Date(2005,1,1);
while qry.next() {
println qry.name:<20, qry[2].fmtDate(‘yyyy’);
}
Copyright 2005 James J.B. Huang
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Targeted Uses
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OS shell functions
Universal RDBMS client and reporting
Multiple format text processors
Java, COM and WSDL glue language
Software build, package, test and deploy
Internet clients
Documentation generator
Java-based GUI toolkit
General-purpose programming/scripting language
Copyright 2005 James J.B. Huang
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Components of JudoScript
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JudoScript consists of 3 components:
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Syntactic support
Built-in data structures and object types
System functions
Each functional feature may involve one
or more of these components.
Copyright 2005 James J.B. Huang
25
I. Vision and JudoScript Design
I.
II.
III.
Vision and JudoScript Design
JudoScript Strengths
Language Design Discussion
Copyright 2005 James J.B. Huang
26
II. JudoScript Strengths
I.
II.
III.
Vision and JudoScript Design
JudoScript Strengths
Language Design Discussion
Copyright 2005 James J.B. Huang
27
JudoScript Domain Support
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
28
Topic: SQL Scripting
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
29
[sql]
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SQL Scripting
Run SQL statements in groups/batches.
Run parameterized SQL with easy
parameter binding.
Run dynamically constructed SQL.
Invoke stored procedures.
Heuristic JDBC connections.
Multiple simultaneous connections.
Copyright 2005 James J.B. Huang
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[sql]
Run SQL Statements
db::connect 'jdbc:mysql://localhost/db','user','pass';
db::sql {
INSERT INTO emp(num,name) VALUES(104, 'Monier');
INSERT INTO emp(num,name) VALUES(105, 'Tan');
}
db::batch {
INSERT INTO emp(num,name) VALUES(106, 'Lin');
INSERT INTO emp(num,name) VALUES(107, 'Patel');
}
db::disconnect;
Copyright 2005 James J.B. Huang
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[sql]
Run Parameterized SQL
db::connect dbUrl, dbUser, dbPass;
db::prepare upd:
INSERT INTO emp(num,name) VALUES(:num,:name);
do $$local as lines {
var data = $_.csv('|');
db::sql upd with num:int=data[0], name=data[1];
}
db::disconnect;
EndScript ======================================
101|James
102|Daniel
103|Linda
Copyright 2005 James J.B. Huang
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[sql]
Run Constructed SQL
names = ['James', 'Daniel', 'Linda'];
db::connect dbUrl, dbUser, dbPass;
db::query qry:
SELECT num, name FROM emp WHERE name IN
((* names.concat( ',', {x|return "'${x}'";} ) *));
// => WHERE name IN ('James','Daniel','Linda')
while qry.next() {
println qry.num, ' ', qry.name;
}
db::disconnect;
Copyright 2005 James J.B. Huang
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[sql]
Call Stored Procedure
db::connect anOracleUrl, dbUser, dbPass;
db::any [[*
CREATE OR REPLACE PROCEDURE test_proc
(p_io IN OUT NUMBER, p_i IN VARCHAR, p_o OUT VARCHAR)
AS BEGIN
p_o := p_i;
IF p_io IS NOT NULL THEN
p_io := p_io + 1;
ELSE
p_io := -1000;
END IF;
END;
*]];
// to be continued …
Copyright 2005 James J.B. Huang
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[sql]
Call Stored Procedure
cont'd
db::prepareCall:
{ call test_proc( :pIO, :pIn, :pOut) };
x = null;
y = 'abcd';
db::sql with @pIO :int <=> x,
@pIn :varchar = y,
@pOut:varchar => z;
println 'x = ', x;
println 'z = ', z;
db::disconnect;
Copyright 2005 James J.B. Huang
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Topic: SGML and XML Scripting
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
36
[sgml]

SGML and XML Scripting
Event-driven statements for processing
SGML, XML and JSP/ASP pages:
do src as sgml { … }
do src as xml { … }
do src as jsp { … }
Copyright 2005 James J.B. Huang
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[sgml]
SGML/HTML Scraping
do 'http://www.yahoo.com' as sgml
{
<a>:
if ($_.href) println '<a>: ', $_.href;
:TEXT: println 'TEXT: length=', $_.length();
<>:
println 'Tag: ', $_.getName();
<!>:
println 'Special Tag: ', $_;
}
Copyright 2005 James J.B. Huang
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[sgml]
An Internet Robot
urls = Set[ 'http://yahoo.com' ];
visited = Set[];
while urls.size()>0 {
var url = urls.getOne();
if visited.contains(url) {
urls.remove(url);
} else {
visited.add(url);
do url as sgml {
<a>:
if($_.href) urls.add($_.href);
<iframe>: if($_.src) urls.add($_.src);
}
}
}
Copyright 2005 James J.B. Huang
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[sgml]
XML Scripting: Easy SAX
do $$local as xml {
<book>:
println 'Book by: ', $_.author;
</book>:
println '-----------------';
<title>TEXT: println 'Titlte: ', $_;
}
EndScript =======================================
<book author="Dan Brown">
<title>The Da Vinci Code</title>
</book>
Copyright 2005 James J.B. Huang
40
Topic: F.S. and Archives
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
41
[fs]
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F.S. and Archives
The versatile copy command.
The powerful listFiles command.
Directory commands: mkdir, rmdir, cd,
pushd, popd.
The String object is also used to represent
file and directory paths.
Copyright 2005 James J.B. Huang
42
[fs]
Copy Files between
Directories and/or Archives
copy '*.java, *.properties' except '*/save/*, *~'
in 'c:/src' recursive to 'c:/backup/src';
copy '*.java, *.properties' except '*/save/*, *~'
in 'c:/src' recursive into 'c:/backup.tar.gz';
copy '*.java, *.properties' except '*/save/*, *~'
in 'c:/src' recursive into 'c:/backup.zip';
copy '*' in 'c:/backup.zip' recursive
to 'c:/src' Echo;
Copyright 2005 James J.B. Huang
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[fs]
Copy Many Directory Trees
into One Archive
zipName =
'c:/backup-' + Date().fmtDate('yyyyMMdd') + '.zip';
arch = createZip(zipName);
copy '*.java, *.properties' except '*/save/*, *~'
in 'c:/src' recursive into arch under 'src';
copy '*' except '*/save/*'
in 'e:/doc' recursive into arch under 'doc';
//copy more trees ...
arch.close();
Copyright 2005 James J.B. Huang
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[fs]
Create Executable Jar
copy '*.java, *.properties' in 'c:/temp/classes/' recursive
into 'c:/judo.jar' store manifest
[[*
Manifest-Version: 1.0
Main-Class: judo
Created-By: James Jianbo Huang (c) 2001-(* #year *)
*]];
Copyright 2005 James J.B. Huang
45
[fs]
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The listFiles Command
It returns the result in $_.
It can return files and directories, or return
stats about them.
It allows you to perform any actions on
files and directories.
Copyright 2005 James J.B. Huang
46
[fs]
Find Files
ls 'c:/src/com/judoscript/*.java' recursive;
listFiles 'com/judoscript/*.java' except '*/save/*'
in 'c:/src' recursive
order by date // size/name/extension
limit 500;
for f in $_ { println f; }
listFiles 'com/judoscript/*.java'
in 'c:/src' recursive as tree;
for f in $_.bfsAllNodes() { println f.path; }
Copyright 2005 James J.B. Huang
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[fs]
Get File Stats
listFiles '*.java' recursive size;
listFiles '*.java' recursive count;
listFiles '*.java' recursive lines;
listFiles '*.java' recursive words;
listFiles '*.java' in 'src.zip' recursive
compressedSize;
Copyright 2005 James J.B. Huang
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[fs]
Operate on Files
listFiles '*.java' setFileTime;
listFiles '*.java' setFileTime Date(2002,4,5,11,30);
listFiles '*.java' setReadOnly;
listFiles '*.java' // arbitrary shell operation
exec isWindows() ? 'attrib +r $_' : 'chmod a+r $_';
listFiles '*.java' { // arbitrary operation
if getFileAsString($_).contains('Judo') {
println 'File $_ contains "Judo".';
}
}
Copyright 2005 James J.B. Huang
49
Topic: I/O and Logging
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
50
[io]
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The Print Family Commands
The print, println and flush
commands.
Can write text to stdout, stderr, log
and any text files and output streams.
Easy and powerful formatting: alignment
and repeating options.
Copyright 2005 James J.B. Huang
51
[io]
Printing to different targets
println
println<out>
println<err>
println<log>
'Hello, world!';
'Hello, world!';
'Well, shit happens.';
'Oh yeah!';
f = openTextFile('foo.txt', 'w');
println<f> 'Lah lah lah lah laah lah.';
f.close();
sw = createStringWriter();
for x from 1 to 10 { println<sw> '#', x, ' '; };
println sw.toString();
Copyright 2005 James J.B. Huang
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[io]
Printing with formatting
println 'abcdefg':<9, 123:>5, 123.45:*5.3, '*'{5};
name = 'James Huang';
println name, nl, '-'{name.length()};
// print a text file with line numbers:
do 'judo.java' as lines {
println loopIndex()+1:>3, ': ', $_;
}
Copyright 2005 James J.B. Huang
53
Topic: Run Executables
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
54
[exec]
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
The exec Command
Supports sophisticated command-lines, including
piping and redirections.
Can take multiple lines for readability.
Can specify the starting directory and
environment variables.
Run asynchronously and synchronously, and
return the executable exit value.
Can pump input to and read output from the
executable, simultaneously or individually.
Copyright 2005 James J.B. Huang
55
[exec]
Run javac
exec /bg 'javac *.java';
exec 'javac *.java'
with CLASSPATH='${CLASSPATH}${:}${lib}/mylibs.jar';
exec [[* javac ${src}/*.java
${src}/com/judoscript/*.java
${src}/com/judoscript/util/*.java
*]]
from '${JDK13HOME}/bin/';
Copyright 2005 James J.B. Huang
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[exec]
Command-lines
exec 'java test.Echo < out_err.judo > alfa';
prg = 'java test.Echo';
exec '${prg} < tee.judo > a.dump | ${prg}';
Copyright 2005 James J.B. Huang
57
[exec]
Interact with executables
exec <a> 'java test.Hello';
println 'Return status code: ', a;
exec /needSystemIn 'java test.ToLower'
output {
while (line=readPipe()) != eof {
println ' #', loopIndex()+1, ': ', line;
}
}
println `dir *.java`;
for x in ``dir *.java`` { println x; }
Copyright 2005 James J.B. Huang
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[exec]
Pump and Read Executable
exec 'java test.ToLower | java test.Echo'
input {
println <pipe> 'Cheers!';
}
exec 'java test.ToLower | java test.Echo'
input { // feed input to the cmdline
println <pipe> 'Hello, World!';
}
output { // read output from the cmdline
while (line = readPipe()) != eof {
println 'Line #', loopIndex()+1, ': ', line;
}
}
Copyright 2005 James J.B. Huang
59
Topic: Java Scripting
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
60
[java]
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
Use and Extend Java
Use all public Java classes and arrays.
Can extend Java classes, including
anonymous Java adapters.
Can alias Java static methods into
JudoScript functions.
Field accesses for Java getter/setters.
Consistent syntactic sugar for major Java
container data structures.
Copyright 2005 James J.B. Huang
61
[java]
Create/Use Java Objects
list = new java::ArrayList;
list.add('abc'); list.add(1);
for x in list { println x; }
list.add(2.5);
Int = new java::Integer(1);
println Int.class.name; // = Int.getClass().getName()
import javax.swing.*;
frm = new java::JFrame('Simplest GUI');
frm.setVisible(true);
Copyright 2005 James J.B. Huang
62
[java]
Create/Use Java Arrays
arr = new java::int[]{ 1, 2, 3 };
for x in arr { println x; }
arr = new java::byte[3];
arr[0]=2; arr[1]=4; arr[2]=6;
arr = new java::String[]{ 'aa', 'bb', 'cc' };
import javax.swing.*;
arr = new java::Button[5];
arr[0] = new java::Button('button 1');
arr[1] = new java::Button('button 2');
Copyright 2005 James J.B. Huang
63
[java]
Use Java Static Members
println (java::System).currentTimeMillis();
println System::currentTimeMillis();
cls = java::System;
cls.out.println('Hello, World!');
import java.sql.Types;
for sqlType in [ 'BIT', 'TINYINT', 'SMALLINT' ] {
println sqlType, ' = ', Types.(sqlType);
}
function pickTrash for System::gc; // aliasing
pickTrash();
Copyright 2005 James J.B. Huang
64
[java]
Extend Classes/Interfaces
import javax.swing.JButton;
class MyButton extends java::JButton {
boolean isSubmit;
constructor title {
super(title);
isSubmit = false;
}
void setText(String title) {
super.setText(title);
isSubmit = title.equalsIgnoreCase('submit');
}
}
Copyright 2005 James J.B. Huang
65
[java]
Java Adapters
import java.awt.event.*;
listner = new java::ActionListner, textListener {
void actionPerformed(ActionEvent ae) {
println 'Action done: ', ae.getActionCommand();
}
void textValueChanged(TextEvent te) {
println 'Text changed: ', te.paramString();
}
}
Copyright 2005 James J.B. Huang
66
Topic: Programming
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
67
[prog]





General Programming
Superset of JavaScript programming.
Genuine O-O programming support.
Very powerful data structures.
Thread programming.
More intuitive syntactic sugar.
We have seen programming in various demos, so here we
just show very few specific programming examples.
Copyright 2005 James J.B. Huang
68
[prog]

String has many methods; its collection of
methods is a union of the following:





String
java.lang.String
JavaScript String object
StringUtils and StringEscapeUtils in
org.apache.commons.lang
JudoScript's own
Strings also represent files and URLs.
Copyright 2005 James J.B. Huang
69
[prog]



More built-in data structures
More methods on these data structures
Built-in data types and data structures:







Data Structures: the Source of
Programming Power
Integer, Float, String and Date/time
Object, OrderedMap, SortedMap
Array, LinkedList, Set
TableData
TreeNode
Stack, Queue
Other built-in domain objects
Copyright 2005 James J.B. Huang
70
[prog]
Array, LinkedList, Set
arr = [ 1, 'abc', Date(2001,11,16) ];
list = LinkedList[ 1, 'abc', Date(2001,11,16) ];
set = Set[ 1, 'abc', Date(2001,11,16) ];
for x in arr { println x; }
arr = [
println
println
println
println
println
4, 2, 7, 5, 10, 9 ];
'Length: ', arr.length();
'Sorted: ', arr.sortAsNumber();
'CSV:
', arr.concat(',');
'[2,3]:
', arr.subarray(2,3);
'Average: ', arr.average();
Copyright 2005 James J.B. Huang
71
[prog]
Custom Sorting
a = [ '1.2','3','3.9','1.10','1.2.1','2.3','3' ];
for x in a.sort(&my_comparator) { println x; }
// Result: 1.10, 1.2, 1.2.1, 2.3, 3, 3, 3.9
function my_comparator(lhs, rhs) {
la = lhs.csv('.');
ra = rhs.csv('.');
lali = la.lastIndex(); rali = ra.lastIndex();
for i from 0 to min(lali,rali) {
if (la[i].int()<ra[i].int()) return -1;
if (la[i].int()>ra[i].int()) return 1;
}
if (lali==rali) return 0;
return lali>rali;
}
Copyright 2005 James J.B. Huang
72
[prog]
Object and OrderedMap
obj = new Object(name='James', bday=Date(2001,11,16));
obj = { name='James', bday=Date(2001,11,16) };
omap = OrderedMap{ name='James', sex='M' };
omap = new OrderedMap(name='James', sex='M');
println 'name => ', obj.name;
println 'bday => ', obj.bday.fmtDate('yyyy-MM-dd');
for key in obj {
println key, ' => ', obj.(key);
}
for key in obj.keysSortByValues() {
println key, ' => ', obj.(key);
}
Copyright 2005 James J.B. Huang
73
[prog]
TableData
a = new TableData('Name', 'Type', 'Birthday');
a.add('Java',
'System',
Date(1996,5,23))
.add('JudoScript', 'Scripting', Date(2001,11,16));
println 'Language | Type
| Birthday';
println '----------+-----------+---------';
printTable a for
column(0):<10!, '| ',
column('Type'):<10!, '| ',
column('Birthday').fmtDate('yyyy-MM');
for lang in a.getColumn('Name') {
println lang;
}
Copyright 2005 James J.B. Huang
74
[prog]
Thread Programming
const #docroot = ${TMPROOT};
// multi-threaded HTTP server:
thread httpHandler(con) { con.serveFile(#docroot); }
ss = startServer(8088);
while {
start thread httpHandler(acceptHttp(ss));
}
// single-threaded HTTP server:
ss = startServer(8088);
while {
acceptHttp(ss).serveFile(#docroot);
}
Copyright 2005 James J.B. Huang
75
Topic: Hibernate Scripting
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
76
[hib]


Hibernate Scripting
Hibernate scripting allows easy use of
persistent objects with the Hibernate ORM
framework.
Provides syntax similar to JDBC scripting for
querying and operations.
Copyright 2005 James J.B. Huang
77
[hib]
Persist Objects
hib::setup (
hibernate.connection.url
= 'jdbc:mysql://localhost/test',
hibernate.connection.username = 'james',
hibernate.connection.password = 'james',
hibernate.hbm2ddl.auto
= 'update',
judoscript.echo
= true
)
TestSimpleTypes // class name(s)
;
x = new java::TestSimpleTypes(10.5, 'abc', Date());
/* Persist: */ hib::save(x);
/* Update: */ x.theFloat = 100.8; hib::update(x);
/* Delete: */ hib::delete x;
Copyright 2005 James J.B. Huang
78
[hib]
Hibernate Query/Delete
hib::query qry:
select o.id, o.theFloat, o.theString
from TestSimpleTypes o
where o.id>:startIdx and o.id<:endIdx
; with startIdx:Long=9, endIdx:Long=15;
for o in qry { println o; }
hib::delete:
from TestSimpleTypes o
where o.id>:startIdx and o.id<:endIdx
; with startIdx:Long=11, endIdx:Long=13;
Copyright 2005 James J.B. Huang
79
Topic: WSDL Scripting
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
80
[wsdl]


WSDL Scripting
WSDL scripting is extremely simple: obtain
the WSDL handle and use it like any object.
JudoScript marshals any object values,
including JudoScript Object,
java.util.Map and Java class, to WSDL
object types.
Copyright 2005 James J.B. Huang
81
[wsdl]
Test with Echo Service
ws = wsdl::'http://testhost/axis/services/echo?wsdl';
println ws.echoStringArray( [ 'o', 'p', 'q' ] );
println ws.echoIntegerArray( [ 10, 20, 30 ] );
mapArray = [ { alfa=1 }, { beta='xyz' } ];
println ws.echoMapArray( mapArray );
Copyright 2005 James J.B. Huang
82
Topic: MS COM Scripting
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
83
[com]

Scripting ActiveX/COM
ActiveX/COM scripting is extremely simple:
obtain the COM and use it like any object.
Copyright 2005 James J.B. Huang
84
[com]
Use VBScript, XMLDOM
sc = new com::ScriptControl;
sc.Language = 'VBScript';
for i from 0 to 9 {
println sc.Eval('${i}+1001');
}
xmldoc = new com::Microsoft.XMLDOM;
xmldoc.async = false;
xmldoc.load('test.xml');
children = xmldoc.documentElement.childNodes;
for i from 0 to children.length-1 {
c = children['item',i];
println c, ' ', c.text;
}
Copyright 2005 James J.B. Huang
85
[com]
Use Excel
xl = new com::Excel.Application;
xl.Visible = true;
workbooks = xl.Workbooks;
workbook = workbooks.Add;
sheet = workbook.ActiveSheet;
a1 = sheet['Range', 'A1'];
a2 = sheet['Range', 'A2'];
a1.Value
= 123.456;
a2.Formula = '=A1*2';
println 'a1: ', a1.Value, ' a2: ', a2.Value;
workbook.Close();
xl.Quit();
Copyright 2005 James J.B. Huang
86
Topic: Internet Clients
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
87
[net]
HTTP Client
h = httpGet('http://www.yahoo.com');
// set header before send:
h.('User-Agent') =
'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)';
// get headers and cookies (connect first):
for x in h.getAllHeaders() { println x, ': ', h.(x); }
for x in h.getCookies() { println x; }
Copyright 2005 James J.B. Huang
88
Topic: Send Mail
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
89
[mail]
Send Mail Made E-Z!
mail::send
from: ‘[email protected]’
to: ‘[email protected], [email protected]’
cc: ‘[email protected]’
subject: ‘Test test’
attach: ‘${ship}/judo.jar, ${ship}/src.jar’
body: [[*
This is a test!
*]];
htmlBody: [[*
This is a <u>test</u>!
*]];
Copyright 2005 James J.B. Huang
90
Topic: GUI Scripting
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
91
[gui]
Java GUI Scripting
import javax.swing.*;
frame = new java::JFrame('Simplest GUI');
frame.setVisible(true);
gui::events {
<frame : Window : windowClosing>: exit 0;
}
Copyright 2005 James J.B. Huang
92
Topic: Ant Task Scripting
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
93
[ant]


Why Script Ant Tasks
Ant tasks comprise a unique form of useful
library of practical utilities.
JudoScript allows you to cut-n-paste Ant
task code and script them immediately.
Copyright 2005 James J.B. Huang
94
[ant]
Script Ant Tasks
a = 'ants';
anttask::<echo message="Hello, ${a}!"/>
anttask::<echo><![CDATA[ Hello, more ${a}! ]]></echo>
fname = '/usr/bin/judo';
anttask::<basename property="b.name" file="${fname}"/>
println 'Base name: ', ${b.name};
anttask::<taskdef name="judo"
classname="com.judoscript.AntJudoScriptTask" />
anttask::<judo>
println 'Judo-in-Ant-in-Judo, a.k.a. AntBurger!';
</judo>
Copyright 2005 James J.B. Huang
95
JudoScript Domain Support
[sql]
[sgml]
[fs]
[io]
[exec]
[java]
[prog]
SQL scripting
SGML/XML scripting
F.S. and archives
I/O and logging
Run executables
Potent Java scripting
Powerful algorithmic and
O-O programming
[hib]
[wsdl]
[com]
[net]
[mail]
[gui]
[ant]
[misc]
Hibernate scripting
WSDL scripting
MS COM scripting
Internet clients
Send mail
GUI scripting
Ant task scripting
Other features
Copyright 2005 James J.B. Huang
96
II. JudoScript Strength
I.
II.
III.
Vision and JudoScript Design
JudoScript Strength
Language Design Discussion
Copyright 2005 James J.B. Huang
97
III. Language Design Discussion
I.
II.
III.
Vision and JudoScript Design
JudoScript Strength
Language Design Discussion
Copyright 2005 James J.B. Huang
98
Programming Language Use Cases
Essential
Programming
Use Cases
Programming
Languages
Extension
Mechanism
“Cute”
Programming
Use Cases
Scripting
Languages
Copyright 2005 James J.B. Huang
Common Utility
Use Cases
JudoScript
(A Useable Language)
Real-World
Use Cases
99
Issues with API Programming



Verbosity
Duplicated Efforts
Leakage-of-concerns



E.g. Use java.util.zip package.
E.g. Use javax.mail package.
The opposite of API programming is
declarative programming.
Copyright 2005 James J.B. Huang
100
Declarative vs API Programming



Declarative programming focuses on
specifying the solution itself
API programming focuses on the
implementation of a solution
Scripting tools are to solve real-world
problems – solution should be the focal
point!
Copyright 2005 James J.B. Huang
101
JudoScript Summary

Trinity of JudoScript






Algorithmic and O-O programming
Java scripting
Domain scripting
Practically Use Java Platform
Script Intuitively, Effectively, Efficiently
JudoScript is the first all-in-one tool!
Copyright 2005 James J.B. Huang
102
III. Language Design Discussion
I.
II.
III.
Vision and JudoScript Design
JudoScript Strength
Language Design Discussion
Copyright 2005 James J.B. Huang
103
To Run JudoScript ̶
1.
2.
3.
4.
Download judo.jar.zip from:
http://www.judoscript.com/download.html
Unzip and add it to your CLASSPATH for Java.
To run a script:
% java judo test.judo -opt=1 param1 param2
To run code from the command-line:
% java judo -x "println versionInfo()"
% alias jx="java judo -x"
% jx ". (1234).fmtHex()"
% jx ". 1.075 ** 30"
% jx ". Date(2008,9,3).dayOfWeek"
Copyright 2005 James J.B. Huang
104
To Learn More about JudoScript ̶
1.
2.
3.
4.
5.
This presentation is listed on:
http://www.judoscript.com/tut_pres.html
The examples library is the best source to get started
and it covers all areas!
http://www.judoscript.com/examples/
The on-going book and other articles:
http://www.judoscript.com/articles/
The Language Reference (somewhat out-of-date):
http://www.judoscript.com/ref/
The whole JudoScript site: http://www.judoscript.com
Copyright 2005 James J.B. Huang
105