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Posted to api@directory.apache.org by Stefan Murawski <st...@gmail.com> on 2013/12/04 13:06:53 UTC

ClassCast Exception with Paging

Hi,

I followed this example to set-up paging for my project:
http://markmail.org/message/43qjepg6shvfvqud

This results in my following code:

PagedResults pagedSearchControl = new PagedResultsDecorator(
                    connection.getCodecService());
            pagedSearchControl.setSize(300);

            // Loop over all the elements
            List<Entry> results = new ArrayList<Entry>();
            boolean hasUnwillingToPerform = false;

            //inspired by http://markmail.org/message/43qjepg6shvfvqud
            while (true) {
                EntryCursor cursor = null;

                try {
                    SearchRequest searchRequest = new SearchRequestImpl();
                    searchRequest.setBase(new Dn(searchRoot));
                    searchRequest.setFilter(searchFilter);
                    searchRequest.setScope(SearchScope.SUBTREE);
                    searchRequest.addAttributes("*");
                    searchRequest.addControl(pagedSearchControl);

                    cursor = new EntryCursorImpl(
                            connection.search(searchRequest));

                    while (cursor.next()) {
                        Entry result = cursor.get();
                        results.add(result);
                    }

                    SearchResultDone result = cursor.getSearchResultDone();
                    pagedSearchControl = (PagedResults) result
                            .getControl(PagedResults.OID);

                    if (result.getLdapResult().getResultCode() ==
ResultCodeEnum.UNWILLING_TO_PERFORM) {
                        hasUnwillingToPerform = true;
                        break;
                    }
                } finally {
                    if (cursor != null) {
                        cursor.close();
                    }
                }

                // check if this is over
                byte[] cookie = pagedSearchControl.getCookie();

                if (Strings.isEmpty(cookie)) {
                    // If so, exit the loop
                    break;
                }

                // Prepare the next iteration, sending a bad cookie
                pagedSearchControl.setCookie("test".getBytes("UTF-8"));
                pagedSearchControl.setSize(300);
            }

Unfortunately I get the following ClassCast-Exception, and don't know how
to proceed further.

java.lang.ClassCastException:
org.apache.directory.api.ldap.codec.BasicControlDecorator cannot be cast to
org.apache.directory.api.ldap.model.message.controls.PagedResults

for:

                    pagedSearchControl = (PagedResults) result
                            .getControl(PagedResults.OID);

I use the following dependency:
<dependency>
<groupId>org.apache.directory.api</groupId>
<artifactId>api-all</artifactId>
<version>1.0.0-M20</version>
</dependency>

Re: ClassCast Exception with Paging

Posted by Emmanuel Lécharny <el...@gmail.com>.
Le 12/4/13 4:38 PM, Daniel Fisher a écrit :
> On Wed, Dec 4, 2013 at 7:06 AM, Stefan Murawski <st...@gmail.com> wrote:
>> Unfortunately I get the following ClassCast-Exception, and don't know how
>> to proceed further.
>>
>> java.lang.ClassCastException:
>> org.apache.directory.api.ldap.codec.BasicControlDecorator cannot be cast to
>> org.apache.directory.api.ldap.model.message.controls.PagedResults
>>
>> for:
>>
>>                     pagedSearchControl = (PagedResults) result
>>                             .getControl(PagedResults.OID);
>>
> Try adding: System.setProperty(StandaloneLdapApiService.CONTROLS_LIST,
> PagedResultsFactory.class.getName());
> at the top of your code.
> I recall seeing CastClassExceptions if the ApiService doesn't know
> about the control.

This is something we have to fix...



-- 
Regards,
Cordialement,
Emmanuel Lécharny
www.iktek.com

Re: ClassCast Exception with Paging

Posted by Stefan Murawski <st...@gmail.com>.
Thanks!
This helped.
And also removing the line

pagedSearchControl.setCookie("test".getBytes("UTF-8"));

which broke the process.


2013/12/4 Daniel Fisher <df...@vt.edu>

> On Wed, Dec 4, 2013 at 7:06 AM, Stefan Murawski <st...@gmail.com> wrote:
> > Unfortunately I get the following ClassCast-Exception, and don't know how
> > to proceed further.
> >
> > java.lang.ClassCastException:
> > org.apache.directory.api.ldap.codec.BasicControlDecorator cannot be cast
> to
> > org.apache.directory.api.ldap.model.message.controls.PagedResults
> >
> > for:
> >
> >                     pagedSearchControl = (PagedResults) result
> >                             .getControl(PagedResults.OID);
> >
>
> Try adding: System.setProperty(StandaloneLdapApiService.CONTROLS_LIST,
> PagedResultsFactory.class.getName());
> at the top of your code.
> I recall seeing CastClassExceptions if the ApiService doesn't know
> about the control.
>
> --Daniel Fisher
>

Re: ClassCast Exception with Paging

Posted by Daniel Fisher <df...@vt.edu>.
On Wed, Dec 4, 2013 at 7:06 AM, Stefan Murawski <st...@gmail.com> wrote:
> Unfortunately I get the following ClassCast-Exception, and don't know how
> to proceed further.
>
> java.lang.ClassCastException:
> org.apache.directory.api.ldap.codec.BasicControlDecorator cannot be cast to
> org.apache.directory.api.ldap.model.message.controls.PagedResults
>
> for:
>
>                     pagedSearchControl = (PagedResults) result
>                             .getControl(PagedResults.OID);
>

Try adding: System.setProperty(StandaloneLdapApiService.CONTROLS_LIST,
PagedResultsFactory.class.getName());
at the top of your code.
I recall seeing CastClassExceptions if the ApiService doesn't know
about the control.

--Daniel Fisher