1. I don't remember that limitation and I have successfully tested my converter with h:selectManyCheckbox.

2. You can name the @Id property whatever you want, convention is however id as that is also the implied and reserved named in older versions of the Hibernate Query Language. It makes things easier.

3. I've added the imports to the example here. But you are getting a ClassCastException, so obviously something with your deployment/configuration is wrong. It might have something to do with wrong imports but I doubt it.

Christian,

Thank you for your input and review.

I will change the names of my ids to id to keep with standards.

I just confirmed that I am using the same imports for the matchingEntityConverter class that you updated on the Documentation/DropdownBoxesWithEntitiesAndPageScope page.

I will re-check the deployment/configurations and will post again. I wonder if my using Postgresql for jboss itself and the app would have anything to do with the issues. I was guessing not but I don't know. I used the booking example as my starting point and have been adding to and modifying that.

Thanks again, Jeff

I forgot to mention, Eclipse is indicating the following warnings in the matchingEntityConverter class:

The serializable class MatchingEntityConverter does not declare a static final serialVersionUID field of type long

public class MatchingEntityConverter implements javax.faces.convert.Converter, Serializable {

AbstractEntityLoader is a raw type. References to generic type AbstractEntityLoader<T> should be parameterized

private AbstractEntityLoader entityLoader;

Set is a raw type. References to generic type Set<E> should be parameterized

HashSet is a raw type. References to generic type HashSet<E> should be parameterized

Set items = new HashSet();

Collection is a raw type. References to generic type Collection<E> should be parameterized

for (Object selectItemsValue : (Collection) selectItems.getValue()) {

Type safety: The method add(Object) belongs to the raw type Set. References to generic type Set<E> should be parameterized

items.add(selectItem.getValue());

Jeff Wexler wrote on Sep 16, 2009 06:01:
I forgot to mention, Eclipse is indicating the following warnings in the matchingEntityConverter class:

The serializable class MatchingEntityConverter does not declare a static final serialVersionUID field of type long

public class MatchingEntityConverter implements javax.faces.convert.Converter, Serializable {

AbstractEntityLoader is a raw type. References to generic type AbstractEntityLoader<T> should be parameterized

private AbstractEntityLoader entityLoader;

Set is a raw type. References to generic type Set<E> should be parameterized

HashSet is a raw type. References to generic type HashSet<E> should be parameterized

Set items = new HashSet();

Collection is a raw type. References to generic type Collection<E> should be parameterized

for (Object selectItemsValue : (Collection) selectItems.getValue()) {

Type safety: The method add(Object) belongs to the raw type Set. References to generic type Set<E> should be parameterized

items.add(selectItem.getValue());

All of the above warnings can be safely ignored. They should however be fixed if this code is going to be going out to the community. It would be nicer then :P

I can't quite understand why you are getting the class cast exception.

java.lang.ClassCastException: org.jboss.seam.ui.JpaEntityLoader_$$_javassist_seam_8 cannot be cast to org.jboss.seam.ui.AbstractEntityLoader

If we look at the JpaEntityLoader class

public class JpaEntityLoader extends AbstractEntityLoader<EntityManager>

Looks pretty obvious that casting JpaEntityLoader to AbstractEntityLoader should work fine.

Can you check you havn't accidently got two different versions of the Seam library on your path?

That is a challenging question for me to answer. The following is my first attempt at answering whether there are two different version of the Seam library on the path.

Actually, I am not really sure where the path is defined.

After investigating, it appears to be ok, but I'm not completely sure. Below are the details of investigating:

Microsoft system environmental variables: No seam library path information defined there.

I use the Seam perspective of Eclipse with the Jboss Tools for Seam and initially generated the project via New Seam Web Project. At that time, Seam was version 2.1.1. I then copied in the relevant contents of the booking example files. At one point, I replaced the Seam 2.1.1 library files with the Seam 2.1.2 versions to upgrade from Seam 2.1.1 to Seam 2.1.2.

There are therefore 4 separate project directories in Eclipse: mysite, mysite-ear, mysite-ejb, and mysite-test.

The following are the libraries as viewed in the exploded directories of the default jboss server:

ear root directory: (Below each are version info from the MANIFEST.MF in the respective jar files)

antlr-runtime.jar
  Created-By: 1.5.0_07 (Apple Computer, Inc.)
commons-beanutils.jar
  Ant-Version: Apache Ant 1.5.3 
  Created-By: 1.4.1_01-b01 (Sun Microsystems Inc.)
  Specification-Version: 1.6
commons-digester.jar
  Ant-Version: Apache Ant 1.5.3 
  Build-Jdk: 1.3.1_19
  Implementation-Version: 1.8
  X-Compile-Source-JDK: 1.2
  X-Compile-Target-JDK: 1.2
drools-compiler.jar
  Build-Jdk: 1.5.0_13
  Specification-Version: 4.0.4
  Implementation-Version: 4.0.4
drools-core.jar
  (Identical to that of drools-compiler.jar above)
jboss-el.jar
  Ant-Version: Apache Ant 1.7.0
  Created-By: 1.5.0_16-133 (Apple Inc.)
  JBoss-EL-Version: 1.0_02.CR2
  Implementation-Version: 1.0_02.CR2
  Specification-Version: 1.0
jboss-seam.jar
  Ant-Version: Apache Ant 1.7.0
  Created-By: 1.5.0_16-133 (Apple Inc.)
  Seam-Version: 2.1.2
  Implementation-Version: 2.1.2
  Specification-Version: 2.1.2
jboss-seam-ui.jar
  Build-Jdk: 1.5.0_16
  Specification-Version: 2.1.2
  Implementation-Version: 2.1.2
jbpm-jpdl.jar
  Ant-Version: Apache Ant 1.6.5
  Created-By: 1.5.0_11-b03 (Sun Microsystems Inc.)
  Implementation-Version: 3.2.2 (date:12-Sep-2007 13:59)
mvel14.jar
  Ant-Version: Apache Ant 1.7.0
  Created-By: 1.6.0_01-41-release (Apple Inc.)
  Specification-Version: 1.2.21
  Implementation-Version: 1.2.21 January 14 2008
richfaces-api.jar
  Build-Jdk: 1.5.0_12
  Specification-Version: 3.3.0.GA
  Implementation-Version: 3.3.0.GA

The following are the contents of the MANIFEST.MF file within the jar META-INF directory:

Manifest-Version: 1.0
Class-Path:  
 antlr-runtime.jar 
 commons-beanutils.jar 
 commons-digester.jar 
 drools-compiler.jar  
 drools-core.jar 
 jboss-el.jar 
 jboss-seam-ui.jar 
 jbpm-jpdl.jar 
 mvel14.jar 
 richfaces-api.jar  

The following are the contents of the MANIFEST.MF file within the war WEB-INF lib directory:

Manifest-Version: 1.0
Class-Path: com-oneaction-ejb.jar 
 antlr-runtime.jar 
 drools-compiler.jar 
 drools-core.jar 
 jboss-el.jar 
 jboss-seam.jar 
 jboss-seam-ui.jar 
 jbpm-jpdl.jar 
 mvel14.jar 
 richfaces-api.jar 

The following are the libraries in the war WEB-INF lib directory and their versions in each's respective MANIFEST.MF file:

commons-beanutils
  (Same version as that of ear root directory above)
commons-digester
  (Same version as that of ear root directory above)
jboss-seam-debug
  Ant-Version: Apache Ant 1.7.0
  Created-By: 1.5.0_16-133 (Apple Inc.)
  Seam-Version: 2.1.2
  Implementation-Version: 2.1.2
  Specification-Version: 2.1.2
jboss-seam-excel
  (Identical info as jboss-seam-debug above)
jboss-seam-ioc
  (Identical info as jboss-seam-debug above)
jboss-seam-mail
  (Identical info as jboss-seam-debug above)
jboss-seam-pdf
  (Identical info as jboss-seam-debug above)
jboss-seam-remoting
  (Identical info as jboss-seam-debug above)
jboss-seam-ui
  (Same version as that of ear root directory above)
jsf-facelets
  Ant-Version: Apache Ant 1.7.0
  Created-By: 1.5.0_14-b03 (Sun Microsystems Inc.)
  Implementation-Version: 1.1.15.B1
jxl
  (No Info in the MANIFEST.MF file. Classes saved on August 9 2008 8:35 pm)
richfaces-impl
  Build-Jdk: 1.5.0_12
  Specification-Version: 3.3.0.GA
  Implementation-Version: 3.3.0.GA
richfaces-ui
  (Identical to that of richfaces-impl above)

The following are the contents of the .classpath file within the mysite-ejb directory in Eclipse:

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
	<classpathentry kind="src" path="ejbModule"/>
	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
	<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/>
	<classpathentry kind="con" path="org.eclipse.jst.server.core.container/org.jboss.ide.eclipse.as.core.server.runtime.runtimeTarget/JBoss 5.1.0.GA Default Runtime"/>
	<classpathentry kind="lib" path="/mysite-ear/EarContent/jboss-seam.jar"/>
	<classpathentry kind="output" path="build/classes"/>
</classpath>

Would it be helpful for me to post contents of some of the other configuration files?

The following are the contents of the MANIFEST.MF file within the war WEB-INF lib directory:

Manifest-Version: 1.0
Class-Path: mysite-ejb.jar 
 antlr-runtime.jar 
 drools-compiler.jar 
 drools-core.jar 
 jboss-el.jar 
 jboss-seam.jar 
 jboss-seam-ui.jar 
 jbpm-jpdl.jar 
 mvel14.jar 
 richfaces-api.jar 

I made the following changes:

1. Renamed all @id attributes of entities to be "id" and modified all classes and xhtml files to use "id".

2. Changed the name of the entityManger in all places from em to entityManager

3. Modified components.xml to be the following:

<?xml version="1.0" encoding="UTF-8"?>
<components xmlns="http://jboss.com/products/seam/components"
            xmlns:bpm="http://jboss.com/products/seam/bpm"
            xmlns:core="http://jboss.com/products/seam/core"
            xmlns:drools="http://jboss.com/products/seam/drools"
            xmlns:framework="http://jboss.com/products/seam/framework"
            xmlns:mail="http://jboss.com/products/seam/mail"
            xmlns:persistence="http://jboss.com/products/seam/persistence"
            xmlns:security="http://jboss.com/products/seam/security"
            xmlns:transaction="http://jboss.com/products/seam/transaction"
            xmlns:web="http://jboss.com/products/seam/web"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation=
                "http://jboss.com/products/seam/core http://jboss.com/products/seam/core-2.1.xsd
                 http://jboss.com/products/seam/framework http://jboss.com/products/seam/framework-2.1.xsd
                 http://jboss.com/products/seam/persistence http://jboss.com/products/seam/persistence-2.1.xsd
                 http://jboss.com/products/seam/drools http://jboss.com/products/seam/drools-2.1.xsd
                 http://jboss.com/products/seam/bpm http://jboss.com/products/seam/bpm-2.1.xsd
                 http://jboss.com/products/seam/transaction http://jboss.com/products/seam/transaction-2.1.xsd
                 http://jboss.com/products/seam/security http://jboss.com/products/seam/security-2.1.xsd
                 http://jboss.com/products/seam/mail http://jboss.com/products/seam/mail-2.1.xsd
                 http://jboss.com/products/seam/web http://jboss.com/products/seam/web-2.1.xsd
                 http://jboss.com/products/seam/components http://jboss.com/products/seam/components-2.1.xsd">

    <core:init jndi-pattern="@jndiPattern@" debug="true" distributable="false"/>

    <core:manager 
    		conversation-timeout="120000"
				concurrent-request-timeout="500"
				conversation-id-parameter="cid"
		/>

    <transaction:ejb-transaction/>
		
    <persistence:entity-manager-factory name="mysiteEntityManagerFactory"
      persistence-unit-name="mysite" installed="@loadPersistenceUnits@"/>
      
		<persistence:managed-persistence-context name="entityManager" 
				auto-create="true"
				entity-manager-factory="#{mysiteEntityManagerFactory}"
      	persistence-unit-jndi-name="java:/mysiteEntityManagerFactory"/>
		
		<component name="identifierMatchingEntityConverter"
				class="mysite.conversation.MatchingEntityConverter"
		>
			<property name="match">id</property>
		</component>
		
		
    <security:identity authenticate-method="#{authenticator.authenticate}"/>

</components>

Now I am getting the following errors:

javax.faces.FacesException: javax.el.ELException: /person04tst05.xhtml @94,83 value="#{person04Create.verify}": Error reading 'verify' on type org.javassist.tmp.java.lang.Object_$$_javassist_seam_3
	at javax.faces.component.UIOutput.getValue(UIOutput.java:187)

Caused by: javax.el.ELException: /person04tst05.xhtml @94,83 value="#{person04Create.verify}": Error reading 'verify' on type org.javassist.tmp.java.lang.Object_$$_javassist_seam_3
	at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:76)

Caused by: javax.ejb.EJBTransactionRolledbackException: java.lang.Long cannot be cast to javax.persistence.EntityManagerFactory
	at org.jboss.ejb3.tx.Ejb3TxPolicy.handleInCallerTx(Ejb3TxPolicy.java:115)

Stack Trace:

javax.faces.FacesException: javax.el.ELException: /person04tst05.xhtml @94,83 value="#{person04Create.verify}": Error reading 'verify' on type org.javassist.tmp.java.lang.Object_$$_javassist_seam_3
	at javax.faces.component.UIOutput.getValue(UIOutput.java:187)
	at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:201)
	at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:284)
	at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:154)
	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:861)
	at org.jboss.seam.ui.util.cdk.RendererBase.renderChild(RendererBase.java:190)
	at org.jboss.seam.ui.util.cdk.RendererBase.renderChildren(RendererBase.java:166)
	at org.jboss.seam.ui.renderkit.ValidateAllRendererBase.doEncodeChildren(ValidateAllRendererBase.java:33)
	at org.jboss.seam.ui.util.cdk.RendererBase.encodeChildren(RendererBase.java:92)
	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
	at org.jboss.seam.ui.util.cdk.RendererBase.renderChild(RendererBase.java:186)
	at org.jboss.seam.ui.util.cdk.RendererBase.renderChildren(RendererBase.java:166)
	at org.jboss.seam.ui.renderkit.DecorateRendererBase.doEncodeChildren(DecorateRendererBase.java:152)
	at org.jboss.seam.ui.util.cdk.RendererBase.encodeChildren(RendererBase.java:92)
	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:930)
	at javax.faces.render.Renderer.encodeChildren(Renderer.java:148)
	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:930)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:933)
	at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
	at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
	at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
	at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:110)
	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
	at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
	at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
	at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:390)
	at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:517)
	at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
	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.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
	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.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.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:598)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:619)
Caused by: javax.el.ELException: /person04tst05.xhtml @94,83 value="#{person04Create.verify}": Error reading 'verify' on type org.javassist.tmp.java.lang.Object_$$_javassist_seam_3
	at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:76)
	at javax.faces.component.UIOutput.getValue(UIOutput.java:184)
	... 68 more
Caused by: javax.ejb.EJBTransactionRolledbackException: java.lang.Long cannot be cast to javax.persistence.EntityManagerFactory
	at org.jboss.ejb3.tx.Ejb3TxPolicy.handleInCallerTx(Ejb3TxPolicy.java:115)
	at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:130)
	at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:194)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.ejb3.security.RoleBasedAuthorizationInterceptorv2.invoke(RoleBasedAuthorizationInterceptorv2.java:201)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:186)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:41)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.ejb3.BlockContainerShutdownInterceptor.invoke(BlockContainerShutdownInterceptor.java:67)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.ejb3.session.SessionSpecContainer.invoke(SessionSpecContainer.java:176)
	at org.jboss.ejb3.session.SessionSpecContainer.invoke(SessionSpecContainer.java:216)
	at org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:207)
	at org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:164)
	at $Proxy620.getVerify(Unknown Source)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
	at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:32)
	at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:76)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
	at org.jboss.seam.ejb.RemoveInterceptor.aroundInvoke(RemoveInterceptor.java:43)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
	at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
	at org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:54)
	at org.javassist.tmp.java.lang.Object_$$_javassist_seam_3.getVerify(Object_$$_javassist_seam_3.java)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at javax.el.BeanELResolver.getValue(BeanELResolver.java:62)
	at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:54)
	at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:72)
	at org.jboss.el.parser.AstPropertySuffix.getValue(AstPropertySuffix.java:53)
	at org.jboss.el.parser.AstValue.getValue(AstValue.java:67)
	at org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
	at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
	... 69 more
Caused by: java.lang.ClassCastException: java.lang.Long cannot be cast to javax.persistence.EntityManagerFactory
	at org.jboss.seam.persistence.ManagedPersistenceContext.getEntityManagerFactoryFromJndiOrValueBinding(ManagedPersistenceContext.java:234)
	at org.jboss.seam.persistence.ManagedPersistenceContext.initEntityManager(ManagedPersistenceContext.java:78)
	at org.jboss.seam.persistence.ManagedPersistenceContext.getEntityManager(ManagedPersistenceContext.java:107)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
	at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:144)
	at org.jboss.seam.Component.callComponentMethod(Component.java:2249)
	at org.jboss.seam.Component.unwrap(Component.java:2275)
	at org.jboss.seam.Component.getInstance(Component.java:2041)
	at org.jboss.seam.Component.getInstance(Component.java:1983)
	at org.jboss.seam.Component.getInstance(Component.java:1977)
	at org.jboss.seam.Component.getInstanceInAllNamespaces(Component.java:2349)
	at org.jboss.seam.Component.getValueToInject(Component.java:2301)
	at org.jboss.seam.Component.injectAttributes(Component.java:1736)
	at org.jboss.seam.Component.inject(Component.java:1554)
	at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:61)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
	at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
	at org.jboss.seam.persistence.EntityManagerProxyInterceptor.aroundInvoke(EntityManagerProxyInterceptor.java:29)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
	at org.jboss.seam.persistence.HibernateSessionProxyInterceptor.aroundInvoke(HibernateSessionProxyInterceptor.java:30)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
	at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
	at org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:50)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.jboss.ejb3.interceptors.aop.EJB3InterceptorInterceptor.invoke(EJB3InterceptorInterceptor.java:83)
	at org.jboss.ejb3.interceptors.aop.EJB3InterceptorInterceptor.invoke(EJB3InterceptorInterceptor.java:70)
	at org.jboss.ejb3.EJBContainerInvocationWrapper.invokeNext(EJBContainerInvocationWrapper.java:59)
	at org.jboss.ejb3.interceptors.aop.InterceptorSequencer.invoke(InterceptorSequencer.java:73)
	at org.jboss.ejb3.interceptors.aop.InterceptorSequencer.aroundInvoke(InterceptorSequencer.java:59)
	at sun.reflect.GeneratedMethodAccessor470.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.jboss.aop.advice.PerJoinpointAdvice.invoke(PerJoinpointAdvice.java:174)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.fillMethod(InvocationContextInterceptor.java:72)
	at org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_fillMethod_21290107.invoke(InvocationContextInterceptor_z_fillMethod_21290107.java)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.setup(InvocationContextInterceptor.java:88)
	at org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_setup_21290107.invoke(InvocationContextInterceptor_z_setup_21290107.java)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.ejb3.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:62)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.ejb3.entity.ExtendedPersistenceContextPropagationInterceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:60)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:56)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:81)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
	at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126)
	... 114 more

persistence.xml is the following:

<?xml version="1.0" encoding="UTF-8"?>
<!-- Persistence deployment descriptor for dev profile -->
<persistence xmlns="http://java.sun.com/xml/ns/persistence" 
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" 
             version="1.0">
             
   <persistence-unit name="mysite" transaction-type="JTA">
      <provider>org.hibernate.ejb.HibernatePersistence</provider>
      <jta-data-source>java:/mysiteDatasource</jta-data-source>
      <properties>
         <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
         <property name="hibernate.show_sql" value="true"/>
         <property name="hibernate.format_sql" value="true"/>
         <property name="jboss.entity.manager.factory.jndi.name" value="java:/mysiteEntityManagerFactory"/>
         <property name="hibernate.cache.provider_class" value="org.hibernate.cache.HashtableCacheProvider"/>
         <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
      </properties>
   </persistence-unit>
    
</persistence>

Any ideas as to the cause of the issue?

Thanks

Jeff

Hello Jeff, I'm also trying to implement custom converter and I have exactly the same problem as you - ClassCastException. Are you sure that after having the changes you resolved THIS exception and you are not falling in javax.el.ELException BEFORE the ClassCast should happen? I'm asking you because classcast exception concerns wrong jar files (mixing libraries).

Thank you in advance.

Hello Alexander,

I found some issues with jar files since September which I believe I corrected. However, I have not attempted to implement the custom converter since September and ended up getting the s:convertEntity to work (which was extremely challenging for me to fix the issues at the time).

I do not know as of yet whether the changes of jar files would have corrected the issue with the custom converter. I plan to take another look at it again tomorrow and see if I can post some further insight into it.

Regards,

Jeff

Hello Jeff,

Thank you for the answer. In fact, I wish to get this s:convertEntity working by all means. Of course, I have already tried to use this built-in converter but failed. Please, tell me, did you changed somehow equals() and hashCode()? My methods are not working well :(

@Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((getId() == null) ? 0 : getId().hashCode()); return result; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } //http://www.seamframework.org/Documentation/IGetValueIsNotAValidOptionWhenUsingSselectItemsAndSconvertEntityOrACustomConverter // if (getClass() != obj.getClass()) { // return false; // } Projects other = (Projects) obj; if (getId() == null) { if (other.getId() != null) { return false; } } else if (!getId().equals(other.getId())) { return false; } return true; }

I took a glance at https://www.hibernate.org/109.html as well as http://djeang.blogspot.com/2005/08/override-equals-and-hashcode-methods.html

Thanks.

Oh, here is a good formatting:

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((getId() == null) ? 0 : getId().hashCode());
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (obj == null) {
      return false;
    }
    //http://www.seamframework.org/Documentation/IGetValueIsNotAValidOptionWhenUsingSselectItemsAndSconvertEntityOrACustomConverter
//    if (getClass() != obj.getClass()) {
//      return false;
//    }
    Projects other = (Projects) obj;
    if (getId() == null) {
      if (other.getId() != null) {
        return false;
      }
    } else if (!getId().equals(other.getId())) {
      return false;
    }
    return true;
  }

Hello Alexander,

I just recalled changes that enabled the s:convertEntity to work for me. I took a different approach than via modification to hashcode() and equals(Object obj).

My initial solution was by making <framework:entity-query entries in components.xml.

Later, after I cleaned up my libraries issues, I got a solution more preferable to me working which I will describe below. I assume that you have read the following post because you were able to find Christian Bauer's MatchingEntityConverter.

Dropdowns in JSF: Validating the selected value

Near the top of that post, there is a section titled "The Workarounds". In your solution, it appears that you are attempting the workaround #2. The one that I got to work was workaround #1 "1.Display the list and submit the form inside the same long running conversation (so that the persistence context returns the same object both times)."

So, this is what I did. If I recall correctly, the @Scope(CONVERSATION) on the class, the @PersistenceContext(type=PersistenceContextType.EXTENDED) and @In(create=true) on the entityManager and the @Factory on getMyOptionsList() were important. The @TransactionAttribute(REQUIRES_NEW) might also have been important.

package com.mysite;

import static org.jboss.seam.ScopeType.CONVERSATION;
import static javax.ejb.TransactionAttributeType.REQUIRES_NEW;
import java.io.Serializable;
import java.util.List;
import javax.ejb.Remove;
import javax.ejb.Stateful;
import javax.ejb.TransactionAttribute;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceContextType;

import org.jboss.seam.annotations.Create;
import org.jboss.seam.annotations.Destroy;
import org.jboss.seam.annotations.Factory;
import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;

@Stateful
@Scope(CONVERSATION)
@Name("myOptionList")
@TransactionAttribute(REQUIRES_NEW)
public class MyOptionListAction implements MyOptionList, Serializable
{
private static final long serialVersionUID = 4292649042195284573L;
public MyOptionListAction() {};
@PersistenceContext(type=PersistenceContextType.EXTENDED)
@In(create=true)
private EntityManager entityManager;

private List<MyOption> myOptionsList;

@Create
public void create() { getMyOptionsList(); }

@SuppressWarnings("unchecked")
@Factory
public List<MyOption> getMyOptionsList()
{
 return (List<MyOption>) entityManager.createQuery(
  "select r from MyOption r where " + 
  "r.someParameter.id = :someParameterId " + 
  "order by r.order asc")
      		  
  .setParameter("someParameterId", valueIWantToMatchTo)
  .getResultList();
}      

public void setMyOptionsList(List<MyOption> myOptionsList)
{ this.myOptionsList = myOptionsList; }

@Destroy
@Remove
public void destroy() {}
}

And then in the conversation object where I capture the value of the s:convertEntity and use it, I ensure that I inject the SAME persistence context. This was key.

@Stateful
@Name("useOfMyOptionsList")
@Scope(ScopeType.CONVERSATION)
@TransactionAttribute(REQUIRES_NEW)
public class UseOfMyOptionsListAction implements UseOfMyOptionsList
{

public UseOfMyOptionsListAction() {}

@PersistenceContext(type=PersistenceContextType.EXTENDED)
@In(create=true)
private EntityManager entityManager;

@DataModel
private List<MyOption> chosenMyOptions = null;

The, the rest of the code.

}

Here is the xhtml code:

<h:selectManyListbox id="theSelectManyCheckboxlistId"
 value="#{useOfMyOptionsList.chosenMyOptions}"
 valueChangeListener="#{useOfMyOptionsList.vclForchosenMyOptions}"
>

<s:selectItems value="#{myOptionsList}"
 var="chosenMyOptionVar"
 label="#{chosenMyOptionVar.label}"
/>
<s:convertEntity />

Good news Jeff!

Yesterday I found that @Scope(CONVERSATION) really does the job. I mean that I have already used the converter but it did not help to make the restriction in my EJBQL statement. In fact I use only EntityHome / EntityQuery internal framework to have rapid development. Certainly, I experienced many problems (probably I should use the latest SEAM) but it's worth it.

I see that you use h:selectManyListbox. It is my next step and I've got a problem from converter (Caused by org.jboss.seam.Entity$NotEntityException with message: Not an entity class: java.util.ArrayList).

Are you sure that the @Factory is a must for the public

List<MyOption> getMyOptionsList()

?

Why you separated the list for options to the UseOfMyOptionsListAction instead of inplace definition of vclForchosenMyOptions? Is it obligatory?

Thank you.

Hi Alexander,

That is great news that the @Scope(CONVERSATION) helped you. So, you were able to get the matchngEntityConverter class working? I still have not tried that again yet due to being swamped with other things but am curious to know how that went for you. I may want to try using that again later on.

In regards to the error you mentioned:

org.jboss.seam.Entity$NotEntityException with message:

"Not an entity class: java.util.ArrayList"

I am not sure about that one. I vaguely recall that I may have removed @DataModel from the definition of private List<MyOption> myOptionsList; in the MyOptionListAction class due to an error with having the @DataModel there.

I am not sure if the @Factory is a must or not. I also vaguely recall issues when I tried commenting it out.

I may not be completely understanding the following question: "separated the list for options to the UseOfMyOptionsListAction instead of inplace definition of vclForchosenMyOptions?".

In terms of :

<h:selectManyListbox id="theSelectManyCheckboxlistId"
 value="#{useOfMyOptionsList.chosenMyOptions}"
 valueChangeListener="#{useOfMyOptionsList.vclForchosenMyOptions}"
>

My implementation certainly may not be the best or most efficient way. Initially, I did not have the valueChangeListener part. I added that after so that I could trigger a method upon change of the selectManyListbox by the user. Actually, when doing so, useOfMyOptionsList.chosenMyOptions was not being assigned the new value when the method was run and therefore the first statement of vclForchosenMyOptions is:

setChosenMyOptions((List<MyOption>) valueChangeEvent.getNewValue());

By doing this, I can use the value of chosenMyOptions right away in the method. I suppose, it may in fact be redundant to also have the

value="#{useOfMyOptionsList.chosenMyOptions}"

part also but I have not tried it without that part.

When I first got the s:convertEntity to work via the initial way (i.e., using components.xml), I literally cried out in joy, hugged my family, and took them to DisneyLand! It was so tough and such a long struggle to get that to actually work. Then when I got the 2nd way to work, I fealt happy that I finally was getting some trackion in bettering my understanding of Seam.

Jeff

Hello Jeff,

Just wanted to thank you again because your answers inspired me to achieve my objective and to find an appropriate solution. Now I move on to the new task.

So, finally, I didn't give up EntityHome/EntityQuery framework and it works just as needed:

- Factory is not a necessary thing to get converter (built-in) works - @Scope(CONVERSATION) is a MUST for a entity query component - dynamic list is defined at the EntityHome of a dependent entity (using @Datamodel annotation - I didn't check if it is mandatory) - more than one converter for different persistence units has been used (it works,but I didn't mix them at one page)

Have a good day!

Hello Alexander,

Sounds very good. Your insight is also helpful.

Have a nice day!

Jeff