Great that is exactly what I am looking for. I even created an
interface to specify the function signatures. However:
Java Program:
public class trigger {
public static void main(String[] args) {
test e = new test();
System.out.println("Sum: " + e.sum(10, 20));
System.out.println("Times: " + e.times(10, 20));
}
}
when executing it:
java trigger
results in:
Exception in thread "main" java.lang.RuntimeException: No Context
associated with current Thread
at org.mozilla.javascript.Context.getContext(Context.java:2277)
at org.mozilla.javascript.JavaMembers.<init>(JavaMembers.java:68)
at
org.mozilla.javascript.JavaMembers.lookupClass(JavaMembers.java:759)
at
org.mozilla.javascript.NativeJavaObject.initMembers(NativeJavaObject.java:90)
at
org.mozilla.javascript.NativeJavaObject.<init>(NativeJavaObject.java:80)
at
org.mozilla.javascript.JavaAdapter.createAdapterWrapper(JavaAdapter.java:145)
at test.<init>(<adapter>)
at trigger.main(trigger.java:4)
Interface:
public interface sample {
public int sum(int a, int b);
public int times(int a, int b);
}
Javascript:
function sum(a, b) {
return a+b;
}
function times(a, b) {
return a*b;
}
JSC:
java org.mozilla.javascript.tools.jsc.Main -extends java.lang.Object
-implements sample test.js
javap test
Compiled from "<adapter>"
public class test extends java.lang.Object implements sample{
public final org.mozilla.javascript.ContextFactory factory;
public final org.mozilla.javascript.Scriptable delegee;
public final org.mozilla.javascript.Scriptable self;
public test(org.mozilla.javascript.ContextFactory,
org.mozilla.javascript.Scriptable);
public test(org.mozilla.javascript.ContextFactory,
org.mozilla.javascript.Scriptable, org.mozilla.javascript.Scriptable);
public test();
public int sum(int, int);
public int times(int, int);
}
Thanks,
-Edwin S. Ramirez-
Norris Boyd wrote:
> On Jan 31, 7:16 pm, [EMAIL PROTECTED] wrote:
>> Hello,
>>
>> I don't understand... I would like to use the class (methods) from Java
>> not from Javascript. Ideally, the compiler would create a class that
>> would contain all or some of the functions exposed as methods. For example:
>>
>> Javascript:
>> function sum1(a, b) {
>> return a+b;
>> }
>>
>> function times(a, b) {
>> return a*b;
>> }
>>
>> jsc generates "simple.class"
>>
>> Java:
>>
>> ...
>> private void junk(int a, int b) {
>> return simple.sum(a, b);
>> }
>> ...
>>
>> Can this be done with JavaAdapter?
>>
>> -Edwin S. Ramirez-Norris Boyd wrote:
>>> On Jan 31, 11:12 am, [EMAIL PROTECTED] wrote:
>>>> Hello,
>>>> Is it possible to expose a script's functions as methods of the class
>>>> when compiling Javascript to a Java class? If yes, how?
>>>> Reason:
>>>> I would like to use Javascript functions as SQL functions within Oracle
>>>> triggers, avoiding recoding these in PL/SQL. Oracle allows for public
>>>> methods within Java classes to be used for this purpose.
>>>> I am able to compile the Javascript using jsc but the functions are not
>>>> directly (as far as I can tell) available from Java.
>>>> Thanks,
>>>> -Edwin S. Ramirez-
>>> If you create a Java interface with the methods you want to expose,
>>> then you can create a JavaAdapter in Rhino. The JavaAdapter can then
>>> be used to have JavaScript objects implement the interface you
>>> defined, and calls to that interface's methods will be resolved to
>>> functions in your object.
>>> --N
>
> Okay, sounds like what you want is to use -extends option with jsc:
>
> java -cp js.jar org.mozilla.javascript.tools.jsc.Main -extends
> java.lang.Object simple.js
>
> Here's a simple example:
>
> [rhino] cat test.js
> function f() { return 3; }
> function g() { return 4; }
> [rhino] java -cp build/rhino1_7R1/js.jar
> org.mozilla.javascript.tools.jsc.Main -extends java.lang.Object
> test.js
> [rhino] javap -classpath . test
> Compiled from "<adapter>"
> public class test extends java.lang.Object{
> public final org.mozilla.javascript.ContextFactory factory;
> public final org.mozilla.javascript.Scriptable delegee;
> public final org.mozilla.javascript.Scriptable self;
> public test(org.mozilla.javascript.ContextFactory,
> org.mozilla.javascript.Scriptable);
> public test(org.mozilla.javascript.ContextFactory,
> org.mozilla.javascript.Scriptable, org.mozilla.javascript.Scriptable);
> public test();
> public java.lang.Object f();
> public java.lang.Object g();
> }
>
> [rhino] java -classpath 'build/rhino1_7R1/js.jar;.'
> org.mozilla.javascript.tools.shell.Main
> Rhino 1.7 release 1 2008 01 23
> js> t = new Packages.test
> [EMAIL PROTECTED]
> js> t.f()
> 3.0
> js> t.g()
> 4.0
>
> Note that we call the class from the Rhino shell at the end, but
> calling it from other Java programs should work fine as well as long
> as js.jar is in the classpath.
>
> --N
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