Re: Exposing my own/wrapper functions using JEXL
Of course we do. It seems the landing page / detailed example is still not
steering users towards the Javadoc which anyhow is not the best media to
explain 'how to' (imho).
Transforming/extracting 'how to's from the unit tests could be the cheapest way
to improve on this area. (As in: how do I integrate my own classes/packages?
-or- how do I ensure scripts are readonly and don't modify data?).
On 2023/08/07 10:08:59 Gary Gregory wrote:
> Do we need better documentation on the site?
>
> Gary
>
> On Mon, Aug 7, 2023, 5:45 AM Henri Biestro wrote:
>
> > Hi;
> > JEXL 3.3. has increased default security by restricting permissions to a
> > very narrow set of allowed classes. In your case, you need to allow JEXL to
> > introspect your package by configuring your permissions. Have a look at
> > JexlPermissions javadoc for more explanations.
> > On JEXL 3.3, with Java 17, If your test class resides in the 'org.example'
> > package, the following code does run without errors.
> > ...
> > Map funcs = new HashMap();
> > funcs.put("math", new MyMath());
> > JexlPermissions permissions = JexlPermissions.parse("org.example.*");
> > JexlEngine jexl = new
> > JexlBuilder().permissions(permissions).namespaces(funcs).create();
> > JexlContext jc = new MapContext();
> > jc.set("pi", Math.PI);
> > JexlExpression e = jexl.createExpression("math:cos(pi)");
> > Object result = e.evaluate(jc);
> > System.out.println("Result: " + result);
> > ...
> >
> > Cheers
> >
> > On 2023/08/06 06:54:05 Aditya Kumar1 wrote:
> > > Hi,
> > >
> > > I was trying to expose my own functions using JEXL library. I am trying
> > the below example.
> > >
> > >
> > > public static class MyMath {
> > > public double cos(final double x) {
> > > return Math.cos(x);
> > > }
> > > }
> > >
> > > public static void testCustomFunction2() {
> > >
> > > try {
> > > Map funcs = new HashMap();
> > > funcs.put("math", new MyMath());
> > > JexlEngine jexl = new
> > JexlBuilder().namespaces(funcs).create();
> > > JexlContext jc = new MapContext();
> > > jc.set("pi", Math.PI);
> > > JexlExpression e = jexl.createExpression("math:cos(pi)");
> > > Object result = e.evaluate(jc);
> > > System.out.println("Result: " + result);
> > > }
> > > catch (JexlException e) {
> > > Throwable original = e.getCause();
> > > System.out.println(e.getMessage());
> > > original.printStackTrace();
> > > //do something with the original
> > > }
> > > }
> > >
> > > which is given at below link:
> > >
> > https://commons.apache.org/proper/commons-jexl/apidocs/org/apache/commons/jexl3/package-summary.html#usage
> > >
> > > When I run the above code, I get below exception.
> > >
> > > org.example.Main.testCustomFunction2:93@1:9 unsolvable function/method
> > 'cos(Float)'
> > > Exception in thread "main" java.lang.NullPointerException
> > >at org.example.Main.testCustomFunction2(Main.java:100)
> > >at org.example.Main.main(Main.java:33)
> > >
> > > Can someone, please help me with this? I think, this is a supported way
> > to use custom functions or exposing my own/wrapper functions. I am using
> > Java 11 to run the above example.
> > >
> > > Thanks,
> > > Aditya
> > >
> > >
> > >
> > > —
> > > Aditya Kumar1
> > > Technology Architect
> > > Precisely.com
> > >
> > > ATTENTION: -The information contained in this message (including
> > any files transmitted with this message) may contain proprietary, trade
> > secret or other confidential and/or legally privileged information. Any
> > pricing information contained in this message or in any files transmitted
> > with this message is always confidential and cannot be shared with any
> > third parties without prior written approval from Precisely. This message
> > is intended to be read only by the individual or entity to whom it is
> > addressed or by their designee. If the reader of this message is not the
> > intended recipient, you are on notice that any use, disclosure, copying or
> > distribution of this message, in any form, is strictly prohibited. If you
> > have received this message in error, please immediately notify the sender
> > and/or Precisely and destroy all copies of this message in your possession,
> > custody or control.
> >
> > -
> > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org
> > For additional commands, e-mail: dev-h...@commons.apache.org
> >
> >
>
-
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RE: Exposing my own/wrapper functions using JEXL
Awesome. I was not aware of this I didn't find any reference to it. I tried
this by adding the permissions in Java 11 and it works perfectly.
Thanks Henri!
-
Aditya Kumar1
Technology Architect
Precisely.com
-Original Message-
From: Henri Biestro
Sent: Monday, August 7, 2023 3:16 PM
To: dev@commons.apache.org
Subject: Re: Exposing my own/wrapper functions using JEXL
This message originated Externally. Use proper judgement and caution with
attachments, links, or responses.
Hi;
JEXL 3.3. has increased default security by restricting permissions to a very
narrow set of allowed classes. In your case, you need to allow JEXL to
introspect your package by configuring your permissions. Have a look at
JexlPermissions javadoc for more explanations.
On JEXL 3.3, with Java 17, If your test class resides in the 'org.example'
package, the following code does run without errors.
...
Map funcs = new HashMap();
funcs.put("math", new MyMath());
JexlPermissions permissions = JexlPermissions.parse("org.example.*");
JexlEngine jexl = new
JexlBuilder().permissions(permissions).namespaces(funcs).create();
JexlContext jc = new MapContext();
jc.set("pi", Math.PI);
JexlExpression e = jexl.createExpression("math:cos(pi)");
Object result = e.evaluate(jc);
System.out.println("Result: " + result); ...
Cheers
On 2023/08/06 06:54:05 Aditya Kumar1 wrote:
> Hi,
>
> I was trying to expose my own functions using JEXL library. I am trying the
> below example.
>
>
> public static class MyMath {
> public double cos(final double x) {
> return Math.cos(x);
> }
> }
>
> public static void testCustomFunction2() {
>
> try {
> Map funcs = new HashMap();
> funcs.put("math", new MyMath());
> JexlEngine jexl = new JexlBuilder().namespaces(funcs).create();
> JexlContext jc = new MapContext();
> jc.set("pi", Math.PI);
> JexlExpression e = jexl.createExpression("math:cos(pi)");
> Object result = e.evaluate(jc);
> System.out.println("Result: " + result);
> }
> catch (JexlException e) {
> Throwable original = e.getCause();
> System.out.println(e.getMessage());
> original.printStackTrace();
> //do something with the original
> }
> }
>
> which is given at below link:
> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Furld
> efense.com%2Fv3%2F__https%3A%2F%2Fcommons.apache.org%2Fproper%2Fcommon
> s-jexl%2Fapidocs%2Forg%2Fapache%2Fcommons%2Fjexl3%2Fpackage-summary.ht
> ml*usage__%3BIw!!I6-MEfEZPA!OVgfmusn_q4uQvS2_BAMfgTG3I2p_DkNlMa4yTTFVn
> MVkTMKs_AfnNeWF99zxN7mfaqLlb7fxedWJ1OGmIcm6Q%24=05%7C01%7CAditya.
> Kumar1%40precisely.com%7C24a01fb9ecc14b90ce4808db972b1d80%7Cc0a2941c29
> 154bcaaa4ce8880dc77f7f%7C0%7C0%7C638269983672897455%7CUnknown%7CTWFpbG
> Zsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%
> 3D%7C3000%7C%7C%7C=jFSGg97oVtXSb8G9w1RbtOQ%2BkNMJORwrsodydXPJF7k
> %3D=0
>
> When I run the above code, I get below exception.
>
> org.example.Main.testCustomFunction2:93@1:9 unsolvable function/method
> 'cos(Float)'
> Exception in thread "main" java.lang.NullPointerException
>at org.example.Main.testCustomFunction2(Main.java:100)
>at org.example.Main.main(Main.java:33)
>
> Can someone, please help me with this? I think, this is a supported way to
> use custom functions or exposing my own/wrapper functions. I am using Java 11
> to run the above example.
>
> Thanks,
> Aditya
>
>
>
> -
> Aditya Kumar1
> Technology Architect
> Precisely.com
>
> ATTENTION: -The information contained in this message (including any
> files transmitted with this message) may contain proprietary, trade secret or
> other confidential and/or legally privileged information. Any pricing
> information contained in this message or in any files transmitted with this
> message is always confidential and cannot be shared with any third parties
> without prior written approval from Precisely. This message is intended to be
> read only by the individual or entity to whom it is addressed or by their
> designee. If the reader of this message is not the intended recipient, you
> are on notice that any use, disclosure, copying or distribution of this
> message, in any form, is strictly prohibited. If you have received this
> message in error, please immediately notify the sender and/or Precisely and
> destroy all copies of this message in your possession, custody or control.
--
Re: Exposing my own/wrapper functions using JEXL
Do we need better documentation on the site?
Gary
On Mon, Aug 7, 2023, 5:45 AM Henri Biestro wrote:
> Hi;
> JEXL 3.3. has increased default security by restricting permissions to a
> very narrow set of allowed classes. In your case, you need to allow JEXL to
> introspect your package by configuring your permissions. Have a look at
> JexlPermissions javadoc for more explanations.
> On JEXL 3.3, with Java 17, If your test class resides in the 'org.example'
> package, the following code does run without errors.
> ...
> Map funcs = new HashMap();
> funcs.put("math", new MyMath());
> JexlPermissions permissions = JexlPermissions.parse("org.example.*");
> JexlEngine jexl = new
> JexlBuilder().permissions(permissions).namespaces(funcs).create();
> JexlContext jc = new MapContext();
> jc.set("pi", Math.PI);
> JexlExpression e = jexl.createExpression("math:cos(pi)");
> Object result = e.evaluate(jc);
> System.out.println("Result: " + result);
> ...
>
> Cheers
>
> On 2023/08/06 06:54:05 Aditya Kumar1 wrote:
> > Hi,
> >
> > I was trying to expose my own functions using JEXL library. I am trying
> the below example.
> >
> >
> > public static class MyMath {
> > public double cos(final double x) {
> > return Math.cos(x);
> > }
> > }
> >
> > public static void testCustomFunction2() {
> >
> > try {
> > Map funcs = new HashMap();
> > funcs.put("math", new MyMath());
> > JexlEngine jexl = new
> JexlBuilder().namespaces(funcs).create();
> > JexlContext jc = new MapContext();
> > jc.set("pi", Math.PI);
> > JexlExpression e = jexl.createExpression("math:cos(pi)");
> > Object result = e.evaluate(jc);
> > System.out.println("Result: " + result);
> > }
> > catch (JexlException e) {
> > Throwable original = e.getCause();
> > System.out.println(e.getMessage());
> > original.printStackTrace();
> > //do something with the original
> > }
> > }
> >
> > which is given at below link:
> >
> https://commons.apache.org/proper/commons-jexl/apidocs/org/apache/commons/jexl3/package-summary.html#usage
> >
> > When I run the above code, I get below exception.
> >
> > org.example.Main.testCustomFunction2:93@1:9 unsolvable function/method
> 'cos(Float)'
> > Exception in thread "main" java.lang.NullPointerException
> >at org.example.Main.testCustomFunction2(Main.java:100)
> >at org.example.Main.main(Main.java:33)
> >
> > Can someone, please help me with this? I think, this is a supported way
> to use custom functions or exposing my own/wrapper functions. I am using
> Java 11 to run the above example.
> >
> > Thanks,
> > Aditya
> >
> >
> >
> > —
> > Aditya Kumar1
> > Technology Architect
> > Precisely.com
> >
> > ATTENTION: -The information contained in this message (including
> any files transmitted with this message) may contain proprietary, trade
> secret or other confidential and/or legally privileged information. Any
> pricing information contained in this message or in any files transmitted
> with this message is always confidential and cannot be shared with any
> third parties without prior written approval from Precisely. This message
> is intended to be read only by the individual or entity to whom it is
> addressed or by their designee. If the reader of this message is not the
> intended recipient, you are on notice that any use, disclosure, copying or
> distribution of this message, in any form, is strictly prohibited. If you
> have received this message in error, please immediately notify the sender
> and/or Precisely and destroy all copies of this message in your possession,
> custody or control.
>
> -
> To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org
> For additional commands, e-mail: dev-h...@commons.apache.org
>
>
Re: Exposing my own/wrapper functions using JEXL
Hi;
JEXL 3.3. has increased default security by restricting permissions to a very
narrow set of allowed classes. In your case, you need to allow JEXL to
introspect your package by configuring your permissions. Have a look at
JexlPermissions javadoc for more explanations.
On JEXL 3.3, with Java 17, If your test class resides in the 'org.example'
package, the following code does run without errors.
...
Map funcs = new HashMap();
funcs.put("math", new MyMath());
JexlPermissions permissions = JexlPermissions.parse("org.example.*");
JexlEngine jexl = new
JexlBuilder().permissions(permissions).namespaces(funcs).create();
JexlContext jc = new MapContext();
jc.set("pi", Math.PI);
JexlExpression e = jexl.createExpression("math:cos(pi)");
Object result = e.evaluate(jc);
System.out.println("Result: " + result);
...
Cheers
On 2023/08/06 06:54:05 Aditya Kumar1 wrote:
> Hi,
>
> I was trying to expose my own functions using JEXL library. I am trying the
> below example.
>
>
> public static class MyMath {
> public double cos(final double x) {
> return Math.cos(x);
> }
> }
>
> public static void testCustomFunction2() {
>
> try {
> Map funcs = new HashMap();
> funcs.put("math", new MyMath());
> JexlEngine jexl = new JexlBuilder().namespaces(funcs).create();
> JexlContext jc = new MapContext();
> jc.set("pi", Math.PI);
> JexlExpression e = jexl.createExpression("math:cos(pi)");
> Object result = e.evaluate(jc);
> System.out.println("Result: " + result);
> }
> catch (JexlException e) {
> Throwable original = e.getCause();
> System.out.println(e.getMessage());
> original.printStackTrace();
> //do something with the original
> }
> }
>
> which is given at below link:
> https://commons.apache.org/proper/commons-jexl/apidocs/org/apache/commons/jexl3/package-summary.html#usage
>
> When I run the above code, I get below exception.
>
> org.example.Main.testCustomFunction2:93@1:9 unsolvable function/method
> 'cos(Float)'
> Exception in thread "main" java.lang.NullPointerException
>at org.example.Main.testCustomFunction2(Main.java:100)
>at org.example.Main.main(Main.java:33)
>
> Can someone, please help me with this? I think, this is a supported way to
> use custom functions or exposing my own/wrapper functions. I am using Java 11
> to run the above example.
>
> Thanks,
> Aditya
>
>
>
> —
> Aditya Kumar1
> Technology Architect
> Precisely.com
>
> ATTENTION: -The information contained in this message (including any
> files transmitted with this message) may contain proprietary, trade secret or
> other confidential and/or legally privileged information. Any pricing
> information contained in this message or in any files transmitted with this
> message is always confidential and cannot be shared with any third parties
> without prior written approval from Precisely. This message is intended to be
> read only by the individual or entity to whom it is addressed or by their
> designee. If the reader of this message is not the intended recipient, you
> are on notice that any use, disclosure, copying or distribution of this
> message, in any form, is strictly prohibited. If you have received this
> message in error, please immediately notify the sender and/or Precisely and
> destroy all copies of this message in your possession, custody or control.
-
To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org
For additional commands, e-mail: dev-h...@commons.apache.org
Exposing my own/wrapper functions using JEXL
Hi,
I was trying to expose my own functions using JEXL library. I am trying the
below example.
public static class MyMath {
public double cos(final double x) {
return Math.cos(x);
}
}
public static void testCustomFunction2() {
try {
Map funcs = new HashMap();
funcs.put("math", new MyMath());
JexlEngine jexl = new JexlBuilder().namespaces(funcs).create();
JexlContext jc = new MapContext();
jc.set("pi", Math.PI);
JexlExpression e = jexl.createExpression("math:cos(pi)");
Object result = e.evaluate(jc);
System.out.println("Result: " + result);
}
catch (JexlException e) {
Throwable original = e.getCause();
System.out.println(e.getMessage());
original.printStackTrace();
//do something with the original
}
}
which is given at below link:
https://commons.apache.org/proper/commons-jexl/apidocs/org/apache/commons/jexl3/package-summary.html#usage
When I run the above code, I get below exception.
org.example.Main.testCustomFunction2:93@1:9 unsolvable function/method
'cos(Float)'
Exception in thread "main" java.lang.NullPointerException
at org.example.Main.testCustomFunction2(Main.java:100)
at org.example.Main.main(Main.java:33)
Can someone, please help me with this? I think, this is a supported way to use
custom functions or exposing my own/wrapper functions. I am using Java 11 to
run the above example.
Thanks,
Aditya
—
Aditya Kumar1
Technology Architect
Precisely.com
ATTENTION: -The information contained in this message (including any files
transmitted with this message) may contain proprietary, trade secret or other
confidential and/or legally privileged information. Any pricing information
contained in this message or in any files transmitted with this message is
always confidential and cannot be shared with any third parties without prior
written approval from Precisely. This message is intended to be read only by
the individual or entity to whom it is addressed or by their designee. If the
reader of this message is not the intended recipient, you are on notice that
any use, disclosure, copying or distribution of this message, in any form, is
strictly prohibited. If you have received this message in error, please
immediately notify the sender and/or Precisely and destroy all copies of this
message in your possession, custody or control.
