package saraelectro;
import java.beans.*;
import java.io.Serializable;
 
/**
 *
 * @author Administrator
 */
public class myBean implements Serializable {
 
    public static final String PROP_SAMPLE_PROPERTY = "sampleProperty";
 
    private String sampleProperty;
 
    private PropertyChangeSupport propertySupport;
 
    public myBean() {
        propertySupport = new PropertyChangeSupport(this);
    }
 
    public String getSampleProperty() {
        return sampleProperty;
    }
 
    public void setSampleProperty(String value) {
        String oldValue = sampleProperty;
        sampleProperty = value;
        propertySupport.firePropertyChange(PROP_SAMPLE_PROPERTY, oldValue, sampleProperty);
    }
 
 
    public void addPropertyChangeListener(PropertyChangeListener listener) {
        propertySupport.addPropertyChangeListener(listener);
    }
 
    public void removePropertyChangeListener(PropertyChangeListener listener) {
        propertySupport.removePropertyChangeListener(listener);
    }
 
}

java.beans.Beans.isDesignTime() ? null : javax.persistence.Persistence.createEntityManagerFactory(myBean1.getSampleProperty()).createEntityManager();