Hello everybody..
I've this problem when ii'm going to search in my DB via hibernate my objects..
The exception is :
Code:
javax.faces.FacesException: javax.faces.el.EvaluationException: Cannot get value for expression '#{BeanListasMedicos.medicos}'
at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:431)
at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:255)
at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:146)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:147)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:662)
Caused by: org.apache.jasper.JasperException: javax.faces.el.EvaluationException: Cannot get value for expression '#{BeanListasMedicos.medicos}'
at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:522)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:416)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
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 org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:425)
... 16 more
Caused by: javax.faces.el.EvaluationException: Cannot get value for expression '#{BeanListasMedicos.medicos}'
at org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:405)
at javax.faces.component.UIData.getValue(UIData.java:1054)
at javax.faces.component.UIData.createDataModel(UIData.java:801)
at javax.faces.component.UIData.getDataModel(UIData.java:781)
at javax.faces.component.UIData.getRowCount(UIData.java:199)
at org.apache.myfaces.shared_impl.renderkit.html.HtmlTableRendererBase.encodeInnerHtml(HtmlTableRendererBase.java:218)
at org.apache.myfaces.shared_impl.renderkit.html.HtmlTableRendererBase.encodeChildren(HtmlTableRendererBase.java:140)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:761)
at javax.faces.webapp.UIComponentTag.encodeChildren(UIComponentTag.java:663)
at javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:544)
at org.apache.jsp.solecitarCambioMedico_jsp._jspx_meth_h_005fdataTable_005f0(solecitarCambioMedico_jsp.java:229)
at org.apache.jsp.solecitarCambioMedico_jsp._jspx_meth_h_005fform_005f0(solecitarCambioMedico_jsp.java:168)
at org.apache.jsp.solecitarCambioMedico_jsp._jspx_meth_f_005fview_005f0(solecitarCambioMedico_jsp.java:132)
at org.apache.jsp.solecitarCambioMedico_jsp._jspService(solecitarCambioMedico_jsp.java:96)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
... 26 more
Caused by: javax.faces.el.EvaluationException: Exception getting value of property medicos of base of type : beans.BeanListasMedicos
at org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:99)
at org.apache.myfaces.el.ELParserHelper$MyPropertySuffix.evaluate(ELParserHelper.java:539)
at org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:145)
at org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:386)
... 42 more
Caused by: javax.faces.el.EvaluationException: Bean: beans.BeanListasMedicos, property: medicos
at org.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:463)
at org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:85)
... 45 more
Caused by: java.lang.reflect.InvocationTargetException
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.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:459)
... 46 more
Caused by: org.hibernate.HibernateException: Javassist Enhancement failed: model.CentroMedico
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.getProxy(JavassistLazyInitializer.java:142)
at org.hibernate.proxy.pojo.javassist.JavassistProxyFactory.getProxy(JavassistProxyFactory.java:72)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.createProxy(AbstractEntityTuplizer.java:402)
at org.hibernate.persister.entity.AbstractEntityPersister.createProxy(AbstractEntityPersister.java:3483)
at org.hibernate.event.def.DefaultLoadEventListener.createProxyIfNecessary(DefaultLoadEventListener.java:298)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:219)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:126)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:905)
at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:873)
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:590)
at org.hibernate.type.EntityType.resolve(EntityType.java:412)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:139)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:877)
at org.hibernate.loader.Loader.doQuery(Loader.java:752)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
at org.hibernate.loader.Loader.doList(Loader.java:2228)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2125)
at org.hibernate.loader.Loader.list(Loader.java:2120)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:401)
at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:361)
at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1148)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102)
at beans.BeanListasMedicos.getMedicos(BeanListasMedicos.java:31)
... 51 more
Caused by: java.lang.InstantiationException: model.CentroMedico_$$_javassist_10
at java.lang.Class.newInstance0(Class.java:340)
at java.lang.Class.newInstance(Class.java:308)
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.getProxy(JavassistLazyInitializer.java:139)
... 74 more
The exception told me that the association between my two tables (MEDICO and CENTRO MEDICO) doesn't work and i don't know why because without this association everything is good and when i'm going to create my tables i've no errors -.-
This are the hibernates file of MEDICO and CENTRO MEDICO
Code:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="model.CentroMedico" table="CENTROMEDICO">
<id name="id" column="id" type="java.lang.Integer">
<generator class="increment"/>
</id>
<property name="nombre" column="nombre" type="java.lang.String"/>
<property name="direccion" column="direccion" type="java.lang.String"/>
<set name="medicos">
<key column="centroMedico_id" />
<one-to-many class="model.Medico" />
</set>
</class>
</hibernate-mapping>
MEDICO !
Code:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="model.Medico" table="MEDICO">
<!-- El identificador y el nombre son los atributos que
hereda de Empleado -->
<id name="id" type="java.lang.Integer">
<generator class="increment" />
</id>
<property name="nombre" column="nombre" type="java.lang.String"/>
<property name="appelidos" column="appelidos" type="java.lang.String"/>
<property name="usuario" column="usuario" type="java.lang.String"/>
<property name="clave" column="clave" type="java.lang.String"/>
<property name="numColegiado" column="numColegiado" type="java.lang.Integer"/>
<many-to-one name="centroMedico" column="centroMedico_id"/>
<one-to-one name="paciente" class="model.Paciente"/>
</class>
</hibernate-mapping>c
Any suggestions ? The one-to-one relation works ...
This is the JSF File, but i think that's good because works perfectly without that one-to-many mapping !!
Code:
<html>
<head>
<title>SolecitarCambioMedico</title>
</head>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<body bgcolor="#FFFF9D">
<font color="#000080" FACE="Arial,Helvetica,Times">
<center>
<h3>Solecitar Cambio Medico</h3>
</center>
<hr>
<f:view>
<h:form id="medicosList">
<center>
<h4>Medicos disponibles</h4>
<h:dataTable id="medicos" value="#{BeanListasMedicos.medicos}" var="medicos"
border="1">
<h:column>
<f:facet name="header">
<h:outputText value="Nombre medico" />
</f:facet>
<h:outputText value="#{medicos.nombre}" />
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="Num colegiado" />
</f:facet>
<h:outputText value="#{medicos.numColegiado}" />
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="Seleccionar" />
</f:facet>
<h:commandLink id="select" action="selectMedico"
actionListener="#{BeanMedico.selectMedico}">
<h:outputText value="Quieres usted ?" />
<f:param id="selectMedicoId" name="selectMedicoId" value="#{medicos.id}" />
</h:commandLink>
</h:column>
</h:dataTable> <br>
<br>
</center>
</h:form>
</f:view> </font>
</body>
</html>
Thanks you !!
GIANNI
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