Javaで体験するスクリプト言語の威力

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1 Java IT Java Scripting API JSR223 JavaScript ECMAScript Groovy J2EE Project Phobos Sarugau JS 2

2 Java Scripting API JSR223 1/3 JavaVM Java JCP Java Community Process JSR 223: Scripting for the Java TM Platform JavaSE6 Mustang Scripting API javax.script ting/index.html SUN JavaSE6 JavaScript ECMAScript 4

3 Scripting API JSR223 2/3 Java Java Java Apache Jakarta Bean Scripting Framework BSF JDBC 5 Scripting API JSR223 3/3 Java OK Java pulic void hoge() { invokefunction( hoge ) var hoge = function() { println( hoge ); Public class Foo { public void bar() { var hoge = function() { var o = new Foo() o.bar(); 6

4 Scripting API JSR223 API javax.script.scriptengine javax.script.scriptenginemanager javax.script.invocable javax.script.scriptcontext javax.script.bindings 7 Scripting API JSR Java

5 Scripting API JSR src/java Hello1.java 9 Scripting API JSR223 1 Hello1.java import javax.script.scriptengine; import javax.script.scriptenginemanager; public class Hello1 { public static void main(string[] args) throws Exception { ScriptEngineManager manager = new ScriptEngineManager(); ScriptEngine engine = manager.getenginebyname("javascript"); // engine.eval("println( Hello World')"); 10

6 Scripting API JSR src/java Hello2.js Hello2.java 11 Scripting API JSR223 2 Hello2.js // println('hello World'); 12

7 Scripting API JSR223 2 Hello2.java public class Hello2 { public static void main(string[] args) throws Exception { engine = engine.eval(new InputStreamReader(Hello2.class.getResourceAsStream("hello2.js"), "UTF-8")); 13 Scripting API JSR src/java Hello3.js Hello3.java 14

8 Scripting API JSR223 3 Hello3.js println('init'); var hello = function() { println('hello World'); var hellomessage = function(p) { println('hello ' + p); 15 Scripting API JSR223 3 Hello3.java import javax.script.invocable; public class Hello3 { public static void main(string[] args) throws Exception { ScriptEngine engine = engine.eval(new InputStreamReader(Hello2.class.getResourceAsStream("hello3.js"), "UTF-8")); Invocable invocable = (Invocable)engine; invocable.invoke("hello", null); invocable.invoke("hellomessage", new Object[]{"Message"); 16

9 Scripting API JSR src/java Hello4.js Hello4.java 17 Scripting API JSR223 4 Hello4.js println(hellomessage + d.time); 18

10 Scripting API JSR223 4 Hello4.java public class Hello4 { public static void main(string[] args) throws Exception { ScriptEngine engine = engine.put("hellomessage", "time="); engine.put("d", new Date()); engine.eval(new InputStreamReader(Hello2.class.getResourceAsStream("hello4.js"), "UTF-8")); 19 Scripting API JSR Java src/java Hello5.java Hello5.js 20

11 Scripting API JSR223 5 Hello5.java public class Hello5 { public static void main(string[] args) throws Exception { ScriptEngine engine = engine.eval(new InputStreamReader(Hello2.class.getResourceAsStream("hello5.js"), "UTF-8")); public String getvalue() { return "1"; public void hellomessage(string p) { System.out.println("hello " + p); 21 Scripting API JSR223 5 Hello5.js var s = new (); var d = new Packages.java.util.Date(); var o = new Packages.Hello5(); println(d.time); o.hellomessage('message' + o.value); 22

12 Scripting API JSR src/java MyInterface.java Hello6.js Hello6.java 23 Scripting API JSR223 6 MyInterface.java public interface MyInterface { void exec(string p); 24

13 Scripting API JSR223 6 Hello6.js var exec = function(p) { println('hello ' + p); 25 Scripting API JSR223 6 Hello6.java public class Hello6 { public static void main(string[] args) throws Exception { ScriptEngine engine = engine.eval(new InputStreamReader(Hello2.class.getResourceAsStream("hello6.js"), "UTF-8")); Invocable inv = (Invocable) engine; MyInterface i = inv.getinterface(myinterface.class); i.exec("message"); 26

14 Scripting API JSR223 jrunscript 1/2 jrunscript JavaSE6 JAVA_HOME bin 27 Scripting API JSR223 jrunscript 2/2 C:>jrunscript js> println('hello world'); hello world js>exit(); c:>jrunscript -f src/java/hello2.js Hello World 28

15 Java 30

16 JavaScript(ECMAScript) 2.0 LiveScript Java 1997 ECMA ECMAScript Asynchronous JavaScript + XML 31 Groovy Java James Strachan, Bob McWhirter Codehaus Ruby, Python, and Smalltalk JSR241 : The Groovy Programming Language XML 32

17 1.Map List 2. 3.Closure Map List src/javascript/maplist.js src/groovy/maplist.groovy src/java/maplist.java a,b,c a A b B c C 34

18 1 MapList.js var l = ['a','b','c']; println(l[1]); var m = {a:'a', b:'b', c:'c'; println(m.b); var lm = ['a', {b:'b', c:[1,2,3] ]; println(lm[1].c[2]); 35 1 MapList.groovy def l = ['a','b','c'] println l[1] def m = ['a':'a', 'b':'b', 'c':'c'] println m.b def lm = ['a', [b:'b', c:[1,2,3]] ] println lm[1].c[2] 36

19 1 MapList.java import java.util.arraylist; import java.util.hashmap; import java.util.list; import java.util.map; public class MapList { public static void main(string[] args) throws Exception { List<String> l = new ArrayList<String>(); l.add("a"); l.add("b"); l.add("b"); System.out.println(l.get(1)); HashMap<String, String> m = new HashMap<String, String>(); m.put("a", "A"); m.put("b", "B"); m.put("c", "C"); System.out.println(m.get("b")); List<Object> lm = new ArrayList<Object>(); lm.add("a"); Map<String, Object> b = new HashMap<String, Object>(); b.put("b", "B"); List<Integer> c = new ArrayList<Integer>(); c.add(1); c.add(2); c.add(3); b.put("c", c); lm.add(b); System.out.println(((List) ((Map) lm.get(1)).get("c")).get(2)); src/javascript/functions.js src/groovy/function.groovy () () Groovy 38

20 2 functions.js 1 println('a'); // 2 println('[' + println + ']'); // 3 4 var runfunction = function(f) { 5 f( Hello ); // 6 7 runfunction( println ); // 8 9 var returnfunction = function() { 10 return println; // var f = returnfunction(); 13 f('hello2'); 14 returnfunction()('hello3'); // 39 3 functions.groovy 1 println('a') 2 println 'a' //() 1 3 println {return println //{ 4 5 def sample1(p) { println(p) 6 sample1('hello1'); 7 def sample2 = { p -> println(p) //-> 8 sample2('hello2') 9 10 def runfunction(f) { f('hello3') 11 runfunction( sample2 ) def returnfunction = { return sample2 14 returnfunction()('hello4') 40

21 3 3.Closure src/javascript/closure.js src/groovy/closure.groovy src/java/closure.java Java JavaSE

22 3 Closure by JavaScript var foreach = function(l, f) { for ( i=0;i<l.length;i++ ) { f(l[i]); var list = [1,2,3,4,5]; var total=0; foreach(list, function(v){total+=v); println(total); 43 3 Closure by Groovy def list = [1,2,3,4,5] def total = 0 list.each {i -> total += i println total Groovy Closure 44

23 3 Closure by Java public class Closure { public static void main(string[] args) { int[] list = new int[] { 1, 2, 3, 4, 5 ; int total = 0; foreach(list, new Function() { public void exec(int i) { total += i; // ); System.out.println(total); public static void foreach(int[] l, Function f) { for (int i : l) { f.exec(i); public interface Function { void exec(int i); 45 J2EE

24 Project Phobos 1/4 Scripting API Web Project GlassFish SUN MVC Struts Map JSP <%%> JavaScript ejs URL 47 Project Phobos 2/4 AJAXList WEB -> samples 2007/07/24 WAR Servlet OK WEB-INF/application controller : list.js script : index.js / view : list.ejs startup.js WEB-INF/ 48

25 Project Phobos 3/4 URL index.js /list/show /list/show controller/list.js show view/list.ejs Add to List submitdata() /list/compute add /list/compute controller/list.js compute XML 49 Project Phobos 4/4 Java JSR223 JRuby JSF ManagedBean Struts ActionForm Seasar 50

26 Sarugau JS 1/3 D HTML CC Ajax DHTML DHTML HTML JavaScript Java Ajax ex. prototype.js, Mochikit 51 Sarugau JS 2/3 DHTML on URL HTML DOM DOM document Map List JavaScript JavaScript DI services.hogehoge DB

27 Sarugau JS 3/3 UI DI JavaScript DOM Ajax Java XML API UI 53

28 1/2 JavaVM Java IDE IDE Java 55 2/2 YES JSP JSTL XML 56

29 57

10/ / /30 3. ( ) 11/ 6 4. UNIX + C socket 11/13 5. ( ) C 11/20 6. http, CGI Perl 11/27 7. ( ) Perl 12/ 4 8. Windows Winsock 12/11 9. JAV

10/ / /30 3. ( ) 11/ 6 4. UNIX + C socket 11/13 5. ( ) C 11/20 6. http, CGI Perl 11/27 7. ( ) Perl 12/ 4 8. Windows Winsock 12/11 9. JAV tutimura@mist.i.u-tokyo.ac.jp kaneko@ipl.t.u-tokyo.ac.jp http://www.misojiro.t.u-tokyo.ac.jp/ tutimura/sem3/ 2002 12 11 p.1/33 10/16 1. 10/23 2. 10/30 3. ( ) 11/ 6 4. UNIX + C socket 11/13 5. ( ) C 11/20