0 Replies Latest reply on Jul 24, 2007 4:05 PM by Bill Durrell

    null pointer exception in Seam conversation using <s:convert

    Bill Durrell Newbie

      Hi , I searched the Seam forum for this problem but did not find exactly this case . I get the following exception navigating my web app that includes a dropdown list . I can go the the page with the dropdown list and save to the database but when I go to the next page and try to return to the dropdown I get the null pointer exception (sometimes) . Not sure how to proceed??? I really like Seam and would like to fix this problem .

      java.lang.NullPointerException
       at com.sun.faces.renderkit.html_basic.MenuRenderer.renderOption(MenuRenderer.java:580)
       at com.sun.faces.renderkit.html_basic.MenuRenderer.renderOptions(MenuRenderer.java:757)
       at com.sun.faces.renderkit.html_basic.MenuRenderer.renderSelect(MenuRenderer.java:811)
       at com.sun.faces.renderkit.html_basic.MenuRenderer.encodeEnd(MenuRenderer.java:335)
       at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:833)
       at javax.faces.component.UIComponent.encodeAll(UIComponent.java:896)
       at javax.faces.render.Renderer.encodeChildren(Renderer.java:137)
       at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:809)
       at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886)
       at javax.faces.component.UIComponent.encodeAll(UIComponent.java:892)
       at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:577)
       at org.ajax4jsf.framework.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
       at org.ajax4jsf.framework.ajax.AjaxViewHandler.renderView(AjaxViewHandler.java:233)
       at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
       at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
       at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
       at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
       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$FilterChainImpl.doFilter(SeamFilter.java:83)
       at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:63)
       at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
       at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:87)
       at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
       at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:63)
       at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
       at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:46)
       at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
       at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127)
       at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277)
       at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:40)
       at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
       at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:140)
       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:230)
       at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
       at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
       at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
       at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
       at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
       at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
       at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
       at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
       at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
       at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
       at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
       at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
       at java.lang.Thread.run(Thread.java:595)
      



      page :
      
      <h:form id="orgProfile1">
       <h1>Register Organization Profile</h1>
       <hr/>
       <h:outputLabel for="orgType" value="#{messages.orgType}"/>
       <h:selectOneMenu value="#{organization.type}" id="orgType">
       <s:selectItems value="#{orgTypeList}" var="type" label="#{type.type}" noSelectionLabel="Select your type"/>
       <s:convertEntity/>
       </h:selectOneMenu>
       <h:commandButton type="submit" value="Save" action="#{profile.save}"/>
       </h:form>
      

      
      package ca.gc.acdi_cida;
      
      import ....
      
      @Stateful
      @Name("profile")
      public class OrganizationalProfileAction implements OrganizationalProfile {
      
       @In (required=false)
       @Out (required=false)
       private Organization organization ;
      
       @Out (required=false)
       private List<OrganizationalType> orgTypeList;
      
       @In(create=true)
       private EntityManager entityManager;
      
      
       @Begin(join=true)
       @SuppressWarnings("unchecked")
       @Factory( "orgTypeList" )
       public void findOrgTypes() {
       System.out.println( " -------------------- Retrieving types..." );
       orgTypeList = entityManager.createQuery("from OrganizationalType ").getResultList();
       System.out.println(" ------------------ orgTypeList size : "+ orgTypeList.size());
      
       }
      
       @End
       public String save(){
       entityManager.persist(organization);
       organization = new Organization();
       return null;
       }
      
       @Remove @Destroy
       public void destroy() {}
      
      }
      

      
      package ca.gc.acdi_cida;
      
      import java.io.Serializable;
      
      import javax.persistence.Entity;
      import javax.persistence.GeneratedValue;
      import javax.persistence.Id;
      import javax.persistence.ManyToOne;
      
      import org.jboss.seam.annotations.Name;
      
      @Entity
      @Name("organization")
      
      public class Organization implements Serializable {
      
      
       private static final long serialVersionUID = 1L;
      
      
       private Integer id;
       private OrganizationalType type;
      
       public Organization(OrganizationalType type) {
       this.type = type;
       }
      
       public Organization() {}
      
       @Id @GeneratedValue
       public Integer getId() {return id;}
       public void setId(Integer id) {this.id = id;}
      
       @ManyToOne
       public OrganizationalType getType() {return type;}
       public void setType(OrganizationalType type) {
       System.out.println(" ------------ Type : " + type);
       this.type = type;
       }
      
      
      
      }
      
      
      
      

      import javax.persistence.Entity;
      import javax.persistence.GeneratedValue;
      import javax.persistence.Id;
      
      import org.jboss.seam.annotations.Name;
      
      @Entity
      @Name("organizationalType")
      
      
      public class OrganizationalType implements Serializable{
      
       /**
       *
       */
       private static final long serialVersionUID = 2490845589570967280L;
       private String type ;
       private Integer id;
      
       public OrganizationalType(){}
      
       public OrganizationalType(String type) {
       this.type = type;
       }
      
       @Id @GeneratedValue
       public Integer getId() {return id;}
       public void setId(Integer id) {this.id = id;}
      
       public String getType() {return type;}
       public void setType(String type) {this.type = type;}
      }
      


      components.xml
      <persistence:managed-persistence-context name="entityManager"
       auto-create="true"
       persistence-unit-jndi-name="java:/hopeEntityManagerFactory"/>
      
      
      

      persistence.xml
       <?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="hope">
       <provider>org.hibernate.ejb.HibernatePersistence</provider>
       <jta-data-source>java:/DefaultDS</jta-data-source>
       <properties>
       <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect" />
       <property name="hibernate.transaction.flush_before_completion" value="true" />
       <property name="hibernate.hbm2ddl.auto" value="create-drop" />
       <property name="hibernate.show_sql" value="true" />
       <property name="jboss.entity.manager.factory.jndi.name" value="java:/hopeEntityManagerFactory"/>
       </properties>
       </persistence-unit>
      
      </persistence>