Subj : RE: Java to Javascript using Rhino
To : netscape.public.mozilla.jseng
From : Aniruddha Thakur
Date : Thu Sep 22 2005 10:41 am
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Hi All,
Update:=20
I was able to run the following from Java using shell.Main in a
single-threaded environment.
I get errors in multi-threaded evironment.
% > java org.mozilla.javascript.tools.shell.Main
scripts/helloworld.js anil=20
Hello World from anil=20
% >
Here is Java--To--JSscript a class: javaToJS.java that calls
tools.shell.Main.main. This part works fine in single threaded
environment. Unfortunately, the second part below needs a few
modifications to the script itself as i do not know how to pass any
arguments (so, i hard coded in the script to test).
package scripts;
=09
=20
import java.io.FileReader;=20
import org.mozilla.javascript.Context;=20
import org.mozilla.javascript.ScriptableObject;
import org.mozilla.javascript.tools.shell.Main;
=09
public class javaToJS {
public static void main(String[] args) {
Context context =3D Context.enter();=20
ScriptableObject scope =3D context.initStandardObjects();
=20
try {
// Part#1: Using tools.shell.Main.main
String[] params =3D { "scripts/helloworld.js", "anil"
};=20
Main.main(params); // or Main.main(args)=20
=20
// Part#2: Using context and need this for
Multi-threaded env to retrieve output
FileReader fileReader =3D new
FileReader("scripts/helloworld.js");
Object result =3D context.evaluateReader(scope,
fileReader, "scripts/helloworld.js", 1, null);=20
System.out.println(Context.toString(result));
System.out.println("---javaToJS DONE----");
} catch (Throwable thr) {
thr.printStackTrace();
} finally {
Context.exit();
}
}
}
=09
% > javac scripts/javaToJS=20
% > java scripts/javaToJS=20
Hello World from anil << from Part#1=20
% > java scripts/javaToJS << Using Part#2 (recompiled and
modified the script)=20
org.mozilla.javascript.EcmaError: ReferenceError: "print" is not
defined. (scripts/helloworld.js#1)
at
org.mozilla.javascript.ScriptRuntime.constructError(ScriptRuntime.java:3
240)
at
org.mozilla.javascript.ScriptRuntime.constructError(ScriptRuntime.java:3
230)
at
org.mozilla.javascript.ScriptRuntime.notFoundError(ScriptRuntime.java:33
03)
at
org.mozilla.javascript.ScriptRuntime.getNameFunctionAndThis(ScriptRuntim
e.java:1890)
at
org.mozilla.javascript.optimizer.OptRuntime.callName(OptRuntime.java:92)
at org.mozilla.javascript.gen.c1._c0(scripts/helloworld.js:1)
at org.mozilla.javascript.gen.c1.call(scripts/helloworld.js)
at
org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:304)
at
org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:2769)
at org.mozilla.javascript.gen.c1.call(scripts/helloworld.js)
at org.mozilla.javascript.gen.c1.exec(scripts/helloworld.js)
at
org.mozilla.javascript.Context.evaluateReader(Context.java:1251)
at scripts.javaToJS.main(javaToJS.java:26)=20
------------------------------------------------
Any help would be appreciated.
Thanks,
- Aniruddha
=20
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=20
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Message
Hi=20
All,
Update:
I was able to run the following =
from Java using=20
shell.Main in a single-threaded environment.
I get=20
errors in multi-threaded evironment.
- % > java =
org.mozilla.javascript.tools.shell.Main=20
scripts/helloworld.js anil
- Hello World from anil=20
- % >
Here=20
is Java--To--JSscript a class: javaToJS.java that calls=20
tools.shell.Main.main. This part works fine in single threaded =
environment.=20
Unfortunately, the second part below needs a few modifications =
to the=20
script itself as i do not know how to pass any arguments =
(so, i=20
hard coded in the script to test).
- package=20
scripts;
- import java.io.FileReader;=20
- import=20
org.mozilla.javascript.Context;=20
- import =
org.mozilla.javascript.ScriptableObject;
- import =
org.mozilla.javascript.tools.shell.Main;
- public class=20
javaToJS {
public static void main(String[] =
args)=20
{
Context =
context =3D=20
Context.enter();
- ScriptableObject =
scope =3D=20
context.initStandardObjects();
-
- try =
{
- &nbs=
p; =20
// Part#1: Using =
tools.shell.Main.main
- &nbs=
p; String[] params =
=3D {=20
"scripts/helloworld.js", "anil" };
- &nbs=
p;=20
Main.main(params); // or Main.main(args)
-
- &nbs=
p; =20
// Part#2: Using context and need this for =
Multi-threaded=20
env to retrieve output
=
- &nb=
sp;FileReader fileReader =3D new=20
FileReader("scripts/helloworld.js");
- &nbs=
p;=20
Object result =3D context.evaluateReader(scope, fileReader,=20
"scripts/helloworld.js", 1, null);
- &nbs=
p;=20
System.out.println(Context.toString(result));
- &nbs=
p;=20
System.out.println("---javaToJS DONE----");
- =
} catch=20
(Throwable thr) {
- &nbs=
p;=20
thr.printStackTrace();
- } finally=20
{
- &nbs=
p;=20
Context.exit();
- =
}
- }
}
- % =
> javac=20
scripts/javaToJS=20
- % =
> java =20
scripts/javaToJS=20
- Hello =
World from=20
anil << from=20
Part#1
- %=20
> java scripts/javaToJS=20
<< Using Part#2 (recompiled and modified the script)
- org.mozilla.javascript.EcmaError: =
ReferenceError:=20
"print" is not defined. (scripts/helloworld.js#1)
at=20
=
org.mozilla.javascript.ScriptRuntime.constructError(ScriptRuntime.java:32=
40)
at=20
=
org.mozilla.javascript.ScriptRuntime.constructError(ScriptRuntime.java:32=
30)
at=20
=
org.mozilla.javascript.ScriptRuntime.notFoundError(ScriptRuntime.java:330=
3)
at=20
=
org.mozilla.javascript.ScriptRuntime.getNameFunctionAndThis(ScriptRuntime=
..java:1890)
at=20
=
org.mozilla.javascript.optimizer.OptRuntime.callName(OptRuntime.java:92)<=
BR> at=20
org.mozilla.javascript.gen.c1._c0(scripts/helloworld.js:1)
at =
org.mozilla.javascript.gen.c1.call(scripts/helloworld.js)
at=20
=
org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:304)<=
BR> at=20
=
org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:2769) at=20
org.mozilla.javascript.gen.c1.call(scripts/helloworld.js)
at=20
org.mozilla.javascript.gen.c1.exec(scripts/helloworld.js)
at=20
=
org.mozilla.javascript.Context.evaluateReader(Context.java:1251)
=
;at=20
scripts.javaToJS.main(javaToJS.java:26)
- ------------------------------------------------
Any =
help would be=20
appreciated.
Thanks,
-=20
Aniruddha
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