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Date: Wed, 15 Mar 2017 08:52:41 +0000 (UTC)
From: "Dmitri Blinov (JIRA)" <jira@apache.org>
To: issues@commons.apache.org
Message-ID: <JIRA.13050309.1489307101000.24022.1489567961561@Atlassian.JIRA>
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References: <JIRA.13050309.1489307101000@Atlassian.JIRA> <JIRA.13050309.1489307101866@jira-lw-us.apache.org>
Subject: [jira] [Commented] (JEXL-222) The ability to declare indexed
 property getter/setter in customised JexlArithmetic implementation
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archived-at: Wed, 15 Mar 2017 08:52:46 -0000


    [ https://issues.apache.org/jira/browse/JEXL-222?page=3Dcom.atlassian.j=
ira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D159257=
64#comment-15925764 ]=20

Dmitri Blinov commented on JEXL-222:
------------------------------------

It has worked for me with the following code:=20
{code}
...        public Object propertySet(IndexedType.IndexedContainer map, Stri=
ng key, Integer value) {
            if (PropertyContainer.class.isAssignableFrom(map.getContainerCl=
ass())
                && map.getContainerName().equals("property")) {
                try {
                    map.set(key, value.toString());
                } catch (Exception xany) {
                    throw new JexlException.Operator(null, map.getContainer=
Class() + "." + key, xany);
                }
                return null;
            }
            return JexlEngine.TRY_FAILED;
        }
...
{code}

Great work, thanks!

> The ability to declare indexed property getter/setter in customised JexlA=
rithmetic implementation
> -------------------------------------------------------------------------=
------------------------
>
>                 Key: JEXL-222
>                 URL: https://issues.apache.org/jira/browse/JEXL-222
>             Project: Commons JEXL
>          Issue Type: Improvement
>    Affects Versions: 3.0
>            Reporter: Dmitri Blinov
>            Assignee: Henri Biestro
>            Priority: Minor
>             Fix For: 3.1
>
>
> At the moment we have the ability to declare a specific getter/setter met=
hod in customized JexlArithmetic class that will be used by Jexl engine whe=
n engine tries to get access to a property of some object. This is great ex=
tension point of the Jexl but I have come to a situation where I need the s=
ame technics to be applied to indexed properties. For example I'm scripting=
 org.w3c.dom.Element object by setting its attributes via its {code}Element=
.setAttribute(java.lang.String name, java.lang.String value) {code} method.=
 In Jexl I use standard indexed property access syntax like the following: =
{code} node.attribute.id =3D "12345"; {code} The problem lies with the last=
 argument of the setAttribute method which is of String class. And for Jexl=
 standard indexed property setter to work I should always remember that in =
script I need to cast specified property value to a string, which is error-=
prone and lacks, in my understanding, scripting easiness. I see the solutio=
n as to introduce custom indexed property setter in more generalized form, =
accepting Object type as a value so it could cast a value to String before =
calling {{Element.setAttribute}}


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