Databases
StackOverflow2013
Postsdbo
POErrors while adding dynamic form field
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POErrors while adding dynamic form field
    primarykey
    data
    text
    <p>I am trying to add dynamic form fields to jsf form. But even following simple codes gives errors.</p> <p><strong>test.xhtml</strong></p> <pre><code>&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:ui="http://java.sun.com/jsf/facelets"&gt; &lt;h:head&gt;&lt;/h:head&gt; &lt;body&gt; &lt;h:form id="form" binding="#{testBean.form}" /&gt; &lt;h:commandButton value="submit" action="#{testBean.submit}" /&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p><strong>Field.java</strong></p> <p>package Entity;</p> <p>public class Field {</p> <pre><code>private String name; public Field() { // TODO Auto-generated constructor stub } public String getName() { return name; } public void setName(String name) { this.name = name; } </code></pre> <p>}</p> <p><strong>testBean.java</strong></p> <pre><code>package beans; import java.io.Serializable; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.el.ELContext; import javax.el.ExpressionFactory; import javax.el.ValueExpression; import javax.faces.application.Application; import javax.faces.bean.ManagedBean; import javax.faces.bean.ViewScoped; import javax.faces.component.UIInput; import javax.faces.component.html.HtmlForm; import javax.faces.component.html.HtmlInputText; import javax.faces.context.FacesContext; import Entity.*; @ManagedBean @ViewScoped public class testBean implements Serializable{ private static final long serialVersionUID = 770513161289990805L; private HtmlForm form = new HtmlForm(); private List&lt;Field&gt; fields=new ArrayList&lt;Field&gt;(); private Map&lt;String, Object&gt; values; private Field field1 = new Field(); private Field field2 = new Field(); public testBean() { field1.setName("aaa"); field2.setName("bbb"); fields.add(field1); fields.add(field2); values = new HashMap&lt;String, Object&gt;(); } private ValueExpression createValueExpression(String binding, Class clazz) { final ValueExpression ve = getExpressionFactory() .createValueExpression(getELContext(), binding, String.class); return ve; } public static ELContext getELContext() { return FacesContext.getCurrentInstance().getELContext(); } public static ExpressionFactory getExpressionFactory() { return getApplication().getExpressionFactory(); } public static Application getApplication() { return FacesContext.getCurrentInstance().getApplication(); } @SuppressWarnings("el-syntax") public HtmlForm getForm() { if (form == null) { form = new HtmlForm(); for (Field field : fields) { UIInput input = new HtmlInputText(); input.setId(field.getName()); // Must be unique! String v = "#{testBean.values['" + field.getName() + "']}"; input.setValueExpression("value", createValueExpression(v, String.class)); form.getChildren().add(input); } } return form; } public void setForm(HtmlForm form) { this.form = form; } public List&lt;Field&gt; getFields() { return fields; } public void setFields(List&lt;Field&gt; fields) { this.fields = fields; } public Map&lt;String, Object&gt; getValues() { return values; } public void setValues(Map&lt;String, Object&gt; values) { this.values = values; } public void submit() { System.out.println("Worked :)"); } } </code></pre> <p>My codes above gives "java.io.NotSerializableException: Entity.Field" error.</p> <pre><code>java.io.NotSerializableException: Entity.Field java.io.ObjectOutputStream.writeObject0(Unknown Source) java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) java.io.ObjectOutputStream.writeSerialData(Unknown Source) java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) java.io.ObjectOutputStream.writeObject0(Unknown Source) java.io.ObjectOutputStream.writeObject(Unknown Source) java.util.HashMap.writeObject(Unknown Source) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) java.lang.reflect.Method.invoke(Unknown Source) java.io.ObjectStreamClass.invokeWriteObject(Unknown Source) java.io.ObjectOutputStream.writeSerialData(Unknown Source) java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) java.io.ObjectOutputStream.writeObject0(Unknown Source) java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) java.io.ObjectOutputStream.writeSerialData(Unknown Source) java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) java.io.ObjectOutputStream.writeObject0(Unknown Source) java.io.ObjectOutputStream.writeArray(Unknown Source) java.io.ObjectOutputStream.writeObject0(Unknown Source) java.io.ObjectOutputStream.writeObject(Unknown Source) java.util.HashMap.writeObject(Unknown Source) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) java.lang.reflect.Method.invoke(Unknown Source) java.io.ObjectStreamClass.invokeWriteObject(Unknown Source) java.io.ObjectOutputStream.writeSerialData(Unknown Source) java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) java.io.ObjectOutputStream.writeObject0(Unknown Source) java.io.ObjectOutputStream.writeObject(Unknown Source) com.sun.faces.renderkit.ClientSideStateHelper.doWriteState(ClientSideStateHelper.java:325) com.sun.faces.renderkit.ClientSideStateHelper.writeState(ClientSideStateHelper.java:173) com.sun.faces.renderkit.ResponseStateManagerImpl.writeState(ResponseStateManagerImpl.java:122) com.sun.faces.application.StateManagerImpl.writeState(StateManagerImpl.java:166) com.sun.faces.application.view.WriteBehindStateWriter.flushToWriter(WriteBehindStateWriter.java:225) com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:419) com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131) com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121) com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139) javax.faces.webapp.FacesServlet.service(FacesServlet.java:594) note The full stack trace of the root cause is available in the Apache Tomcat/7.0.12 logs. </code></pre> <p>If I make Field class Serializable it gives error again.</p> <pre><code>HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception java.io.NotSerializableException: javax.faces.component.html.HtmlForm java.io.ObjectOutputStream.writeObject0(Unknown Source) java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) java.io.ObjectOutputStream.writeSerialData(Unknown Source) java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) java.io.ObjectOutputStream.writeObject0(Unknown Source) java.io.ObjectOutputStream.writeObject(Unknown Source) java.util.HashMap.writeObject(Unknown Source) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) java.lang.reflect.Method.invoke(Unknown Source) java.io.ObjectStreamClass.invokeWriteObject(Unknown Source) java.io.ObjectOutputStream.writeSerialData(Unknown Source) java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) java.io.ObjectOutputStream.writeObject0(Unknown Source) java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) java.io.ObjectOutputStream.writeSerialData(Unknown Source) java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) java.io.ObjectOutputStream.writeObject0(Unknown Source) java.io.ObjectOutputStream.writeArray(Unknown Source) java.io.ObjectOutputStream.writeObject0(Unknown Source) java.io.ObjectOutputStream.writeObject(Unknown Source) java.util.HashMap.writeObject(Unknown Source) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) java.lang.reflect.Method.invoke(Unknown Source) java.io.ObjectStreamClass.invokeWriteObject(Unknown Source) java.io.ObjectOutputStream.writeSerialData(Unknown Source) java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) java.io.ObjectOutputStream.writeObject0(Unknown Source) java.io.ObjectOutputStream.writeObject(Unknown Source) com.sun.faces.renderkit.ClientSideStateHelper.doWriteState(ClientSideStateHelper.java:325) com.sun.faces.renderkit.ClientSideStateHelper.writeState(ClientSideStateHelper.java:173) com.sun.faces.renderkit.ResponseStateManagerImpl.writeState(ResponseStateManagerImpl.java:122) com.sun.faces.application.StateManagerImpl.writeState(StateManagerImpl.java:166) com.sun.faces.application.view.WriteBehindStateWriter.flushToWriter(WriteBehindStateWriter.java:225) com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:419) com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131) com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121) com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139) javax.faces.webapp.FacesServlet.service(FacesServlet.java:594) note The full stack trace of the root cause is available in the Apache Tomcat/7.0.12 logs. Apache Tomcat/7.0.12 </code></pre> <p>What is wrong with my simple code? Thanks in advance</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USBalusC
    1. USnsumer
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POErrors while adding dynamic form field
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POErrors while adding dynamic form field
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload