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Posted to user@commons.apache.org by Jeffrey Puro <jp...@sterlingtesting.com> on 2008/02/06 16:38:31 UTC
JXPath and Collections
I have a pojo that has the following properties:
Class MyPojo {
private Set mySet;
}
Using JXPath, I am trying to add a new object to my Set object called
mySet by using an expression as follows:
context.setValue("mySet/", "New object on set");
However, this does not work when attempting to add elements to a
collection (as it's trying to replace the Set object with my new
String). I'm not sure how one would do this with the setValue method,
but any help would be appreciated.
Regards,
Jeff
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RE: [JXPath] and Collections
Posted by Matt Benson <gu...@yahoo.com>.
--- Jeffrey Puro <jp...@sterlingtesting.com> wrote:
> If I change this to a List, how do I set an element
> on it or add one to
> it?
>
> context.setValue("myList/", "New object on list");
>
> Do I have to specify a particular index or can
> setValue just add on its
> own?
You have to specify the index. And unfortunately it
seems JXPath isn't smart enough to be able to take an
expression as an index. Here's what I had to do here:
//given MyBean { List getList(){...} void
setList(List)}:
MyBean myBean = new MyBean();
myBean.getList().add("foo");
JXPathContext context =
JXPathContext.newContext(myBean);
context.setFactory(new AbstractFactory() {
public boolean createObject(JXPathContext
context, Pointer pointer,
Object parent, String name, int
index) {
if (pointer instanceof
PropertyPointer) {
Object baseValue =
((PropertyPointer) pointer).getBaseValue();
if (baseValue instanceof List) {
List list = (List) baseValue;
while (index >= list.size()) {
list.add(null);
}
return true;
}
}
return false;
}
});
int listSize = ((Integer)
context.getValue("size(/list)")).intValue();
context.createPathAndSetValue("/list[" +
(listSize + 1) + "]", "bar");
HTH,
Matt
>
> Thanks,
>
> Jeff
>
> -----Original Message-----
> From: Matt Benson [mailto:gudnabrsam@yahoo.com]
> Sent: Wednesday, February 06, 2008 3:55 PM
> To: Jakarta Commons Users List
> Subject: Re: JXPath and Collections
>
>
> --- Jeffrey Puro <jp...@sterlingtesting.com> wrote:
>
> > I have a pojo that has the following properties:
> >
>
> Looks like a set is unsupported. :( Could you
> possibly use some kind of wrapper object, possibly
> returning asList() from a commons-collections
> ListOrderedSet from a getSetAsList() method or
> something similar? JXPath can add an element to a
> list.
>
> -Matt
>
> >
> >
> > Class MyPojo {
> >
> >
> >
> > private Set mySet;
> >
> >
> >
> > }
> >
> >
> >
> > Using JXPath, I am trying to add a new object to
> my
> > Set object called
> > mySet by using an expression as follows:
> >
> >
> >
> > context.setValue("mySet/", "New object on set");
> >
> >
> >
> > However, this does not work when attempting to add
> > elements to a
> > collection (as it's trying to replace the Set
> object
> > with my new
> > String). I'm not sure how one would do this with
> > the setValue method,
> > but any help would be appreciated.
> >
> >
> >
> > Regards,
> >
> >
> >
> > Jeff
> >
> >
> > This email (and any attachments) is intended only
> > for the use of the individual or entity named
> above
> > and may contain information that is privileged and
> > confidential. If you are not the intended
> recipient,
> > or have unauthorized access, you are hereby
> notified
> > that copying, disseminating, distributing or
> taking
> > any action in reliance on this email is strictly
> > prohibited<br />
> >
> > Opinions, conclusions and other information in
> this
> > message that do not relate to the official
> business
> > of our firm shall be understood as neither given
> nor
> > endorsed by it.
> >
>
>
>
>
>
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> and may contain information that is privileged and
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> any action in reliance on this email is strictly
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RE: JXPath and Collections
Posted by Jeffrey Puro <jp...@sterlingtesting.com>.
If I change this to a List, how do I set an element on it or add one to
it?
context.setValue("myList/", "New object on list");
Do I have to specify a particular index or can setValue just add on its
own?
Thanks,
Jeff
-----Original Message-----
From: Matt Benson [mailto:gudnabrsam@yahoo.com]
Sent: Wednesday, February 06, 2008 3:55 PM
To: Jakarta Commons Users List
Subject: Re: JXPath and Collections
--- Jeffrey Puro <jp...@sterlingtesting.com> wrote:
> I have a pojo that has the following properties:
>
Looks like a set is unsupported. :( Could you
possibly use some kind of wrapper object, possibly
returning asList() from a commons-collections
ListOrderedSet from a getSetAsList() method or
something similar? JXPath can add an element to a
list.
-Matt
>
>
> Class MyPojo {
>
>
>
> private Set mySet;
>
>
>
> }
>
>
>
> Using JXPath, I am trying to add a new object to my
> Set object called
> mySet by using an expression as follows:
>
>
>
> context.setValue("mySet/", "New object on set");
>
>
>
> However, this does not work when attempting to add
> elements to a
> collection (as it's trying to replace the Set object
> with my new
> String). I'm not sure how one would do this with
> the setValue method,
> but any help would be appreciated.
>
>
>
> Regards,
>
>
>
> Jeff
>
>
> This email (and any attachments) is intended only
> for the use of the individual or entity named above
> and may contain information that is privileged and
> confidential. If you are not the intended recipient,
> or have unauthorized access, you are hereby notified
> that copying, disseminating, distributing or taking
> any action in reliance on this email is strictly
> prohibited<br />
>
> Opinions, conclusions and other information in this
> message that do not relate to the official business
> of our firm shall be understood as neither given nor
> endorsed by it.
>
________________________________________________________________________
____________
Never miss a thing. Make Yahoo your home page.
http://www.yahoo.com/r/hs
---------------------------------------------------------------------
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For additional commands, e-mail: user-help@commons.apache.org
This email (and any attachments) is intended only for the use of the individual or entity named above and may contain information that is privileged and confidential. If you are not the intended recipient, or have unauthorized access, you are hereby notified that copying, disseminating, distributing or taking any action in reliance on this email is strictly prohibited<br />
Opinions, conclusions and other information in this message that do not relate to the official business of our firm shall be understood as neither given nor endorsed by it.
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Re: JXPath and Collections
Posted by Matt Benson <gu...@yahoo.com>.
--- Jeffrey Puro <jp...@sterlingtesting.com> wrote:
> I have a pojo that has the following properties:
>
Looks like a set is unsupported. :( Could you
possibly use some kind of wrapper object, possibly
returning asList() from a commons-collections
ListOrderedSet from a getSetAsList() method or
something similar? JXPath can add an element to a
list.
-Matt
>
>
> Class MyPojo {
>
>
>
> private Set mySet;
>
>
>
> }
>
>
>
> Using JXPath, I am trying to add a new object to my
> Set object called
> mySet by using an expression as follows:
>
>
>
> context.setValue("mySet/", "New object on set");
>
>
>
> However, this does not work when attempting to add
> elements to a
> collection (as it's trying to replace the Set object
> with my new
> String). I'm not sure how one would do this with
> the setValue method,
> but any help would be appreciated.
>
>
>
> Regards,
>
>
>
> Jeff
>
>
> This email (and any attachments) is intended only
> for the use of the individual or entity named above
> and may contain information that is privileged and
> confidential. If you are not the intended recipient,
> or have unauthorized access, you are hereby notified
> that copying, disseminating, distributing or taking
> any action in reliance on this email is strictly
> prohibited<br />
>
> Opinions, conclusions and other information in this
> message that do not relate to the official business
> of our firm shall be understood as neither given nor
> endorsed by it.
>
____________________________________________________________________________________
Never miss a thing. Make Yahoo your home page.
http://www.yahoo.com/r/hs
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