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>
|
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