Problem with SelectItem when multiple="true"

[joe.parks@hyperproductive.com]

I am trying to use a SelectItem with setMultiple(true), allowing the user to pick values for a ManyToMany relationship.
When rendering the form, though, I get a ClassCastException if there are previously assigned values for the relationship.

java.lang.ClassCastException: Value '[418, 417]' of type 'class java.util.ArrayList' can not be cast to type 'class java.lang.Long'.

I have tried to reduce the problem to a simple test case, but the error does not occur in my test case app. Have you seen this before? I've been trying to compare the successful version of this to the failing version; I cannot find the coding error that must exist. Perhaps this rings a bell for someone.

In the failing version, the values are actually populated most of the time, even after the warning dialog that pops up with the ClassCastException message. Sometimes, though, the numeric values are not re-rendered as the "displayField" values.

Please find the relevant supporting details below.

1. SmartClient Version: SNAPSHOT_v8.3d_2012-09-25/Enterprise Deployment (built 2012-09-25)

2. Browser: Internet Explorer 9

3. Server Log:

16:55:26,519 INFO  [STDOUT] === 2012-09-27 16:55:26,510 [80-1] DEBUG RPCManager - Request #1 (DSRequest) payload: {
    criteria:{
        id:[
            418,
            417
        ]
    },
    operationConfig:{
        dataSource:"authorHB",
        operationType:"fetch"
    },
    componentId:"isc_DynamicForm_17",
    appID:"builtinApplication",
    operation:"authorHB_fetch",
    oldValues:{
        id:[
            418,
            417
        ]
    }
}
16:55:26,528 INFO  [STDOUT] === 2012-09-27 16:55:26,519 [80-1] INFO  IDACall - Performing 1 operation(s)
16:55:26,529 INFO  [STDOUT] === 2012-09-27 16:55:26,529 [80-1] DEBUG DeclarativeSecurity - Processing security checks for DataSource null, field null
16:55:26,529 INFO  [STDOUT] === 2012-09-27 16:55:26,529 [80-1] DEBUG DeclarativeSecurity - DataSource authorHB is not in the pre-checked list, processing...
16:55:26,529 INFO  [STDOUT] === 2012-09-27 16:55:26,529 [80-1] DEBUG DeclarativeSecurity - Processing security checks for DataSource authorTypeHB, field authorTypeDescription
16:55:26,529 INFO  [STDOUT] === 2012-09-27 16:55:26,529 [80-1] DEBUG DeclarativeSecurity - DataSource authorTypeHB is not in the pre-checked list, processing...
16:55:26,530 INFO  [STDOUT] === 2012-09-27 16:55:26,529 [80-1] DEBUG AppBase - [builtinApplication.authorHB_fetch] No userTypes defined, allowing anyone access to all operations for this application
16:55:26,530 INFO  [STDOUT] === 2012-09-27 16:55:26,530 [80-1] DEBUG AppBase - [builtinApplication.authorHB_fetch] No public zero-argument method named '_authorHB_fetch' found, performing generic datasource operation
16:55:26,530 INFO  [STDOUT] === 2012-09-27 16:55:26,530 [80-1] INFO  HibernateDataSource - [builtinApplication.authorHB_fetch] Performing fetch operation with
	criteria: {id:[418,417]}	values: {id:[418,417]}
16:55:26,531 INFO  [STDOUT] === 2012-09-27 16:55:26,531 [80-1] WARN  RequestContext - dsRequest.execute() failed: 
java.lang.ClassCastException: Value '[418, 417]' of type 'class java.util.ArrayList' can not be cast to type 'class java.lang.Long'.
	at com.isomorphic.util.DataTools.castValue(DataTools.java:4218)
	at com.isomorphic.hibernate.HibernateDataSource.createPrimaryKey(HibernateDataSource.java:1417)
	at com.isomorphic.hibernate.HibernateDataSource.processRequest(HibernateDataSource.java:839)
	at com.isomorphic.hibernate.HibernateDataSource.executeFetch(HibernateDataSource.java:727)
	at com.isomorphic.datasource.DataSource.execute(DataSource.java:1356)
	at com.isomorphic.application.AppBase.executeDefaultDSOperation(AppBase.java:726)
	at com.isomorphic.application.AppBase.executeAppOperation(AppBase.java:658)
	at com.isomorphic.application.AppBase.execute(AppBase.java:491)
	at com.isomorphic.datasource.DSRequest.execute(DSRequest.java:2000)
	at com.isomorphic.servlet.IDACall.handleDSRequest(IDACall.java:216)
	at com.isomorphic.servlet.IDACall.processRPCTransaction(IDACall.java:173)
	at com.isomorphic.servlet.IDACall.processRequest(IDACall.java:138)
	at com.isomorphic.servlet.IDACall.doPost(IDACall.java:74)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	at com.isomorphic.servlet.BaseServlet.service(BaseServlet.java:152)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.isomorphic.servlet.CompressionFilter.doFilter(CompressionFilter.java:259)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
	at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java)
	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:183)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:534)
	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:95)
	at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
	at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
	at org.apache.catalina.core.StandardHostValve.__invoke(StandardHostValve.java:127)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.internalProcess(ActiveRequestResponseCacheValve.java:74)
	at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.invoke(ActiveRequestResponseCacheValve.java:47)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:599)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:451)
	at java.lang.Thread.run(Thread.java:662)

4. Response in the Developer Console:

[
    {
        data:"Value '[1883, 418, 417]' of type 'class java.util.ArrayList' can not be cast to type 'class java.lang.Long'.", 
        invalidateCache:false, 
        isDSResponse:true, 
        queueStatus:-1, 
        status:-1
    }
]

5. N/A

6. Code
Creating the SelectItem:

final SelectItem selectItem = new SelectItem("authors");
selectItem.setOptionDataSource(DataSource.get("authorHB"));
selectItem.setDisplayField("description");
selectItem.setMultiple(true);
selectItem.setSortField("description");

Defining the relationship in the datasource:

<field name="authors"  multiple="true" foreignKey="authorHB.id"  />

[Isomorphic]

Hi Joe
We may need a reproducible case to give you an answer, but one of our developers is taking a look to see if they can come up with an answer based on the stack trace

Thanks
Isomorphic Software

[alius]

Hi,

I've just committed fix.
You will be able to pick it up with next nightly build.

Regards,
Alius

[joe.parks@hyperproductive.com]

That fixed it. Thanks.