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POCan't bind a nested property along a BeanFieldGroup
 

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  1. POCan't bind a nested property along a BeanFieldGroup
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    <p>I'm developing a vaadin application and now have the following trouble. I'm trying to bind a nested property along BeanFieldGroup.</p> <p>MyEntity Class</p> <pre><code>@Entity public class MyEntity implements Serializable { private static final long serialVersionUID = 1L; @EmbeddedId private MyEntityPK id; //Others Property public MyEntityPK getId() { return this.id; } public void setId(MyEntityPK id) { this.id = id; } } </code></pre> <p>MyEntityPK Class</p> <pre><code>@Embeddable public class MyEntityPK implements Serializable { @Column(name="CD_VARIABILE") private String cdVariabile; public String getCdVariabile() { return this.cdVariabile; } public void setCdVariabile(String cdVariabile) { this.cdVariabile = cdVariabile; } } </code></pre> <p>MyVaadinPanel</p> <pre><code>private BeanFieldGroup&lt;MyEntity&gt; binder; binder = new BeanFieldGroup&lt;MyEntity&gt;(MyEntity.class); binder.setItemDataSource(new BeanItem&lt;MyEntity&gt;(new MyEntity())); variabileBinder.bind(new TextField(), "id.cdVariabile"); </code></pre> <p>When, I try to bind the property "id.cdVariabile" to TextFiel, I get the following error:</p> <pre><code>Caused by: com.vaadin.data.util.MethodProperty$MethodException at com.vaadin.data.util.NestedMethodProperty.getValue(NestedMethodProperty.java:205) at com.vaadin.data.util.TransactionalPropertyWrapper.getValue(TransactionalPropertyWrapper.java:73) at com.vaadin.ui.AbstractField.getDataSourceValue(AbstractField.java:299) at com.vaadin.ui.AbstractField.setPropertyDataSource(AbstractField.java:629) ... 48 more Caused by: java.lang.NullPointerException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.vaadin.data.util.NestedMethodProperty.getValue(NestedMethodProperty.java:201) ... 51 more </code></pre> <p>Where am I wrong ?</p>
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    1. This table or related slice is empty.
 

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