How to bind "Image Field" object on a database

Hi to all
I inserted into a dynamic PDF (Livecycle ES3 trial) an image field, but I don't understand how I can to bind a JPG into a database.
In (F5) preview... I'm able to open a image file on filesystem and visualize it on PDF form... but then? How to bind on database?
In my several tentatives I'm using a MS Access 2010 database table, where I defined a OLE object... but doesn't work.
Thank you at all.
visert

Hi,
I have not tried to do this, but this document provides some instructions.
http://partners.adobe.com/public/developer/en/livecycle/lc_designer_XML_schemas.pdfhttp://partners.adobe.com/public/developer/en/livecycle/lc_designer_XML_schemas.pdf
Hope it helps
Bruce

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Creating a new cell factory, how to bind to my object's property

As near as I can tell, the javafx binding using observable values, alot like jgoodies and its not like SWT databinding or WPF binding.
I was creating a cell factory for a TreeView. Just using a label to display the contents and calling toString, alot like the way it works now. However, I could not figure out to create a binding that would bind to a property on my domain object. Is there a way to specify the binding to the Label's text property so that whatever object that the cell's item's value has I can bind to a property that I specify on it e.g. the "name" property. But I could not see how to do that. Also, the only way I could figure out how to update the Label's value was from updateItem. I thought maybe I could even setup the binding in updateItem so that when the TreeItem's value changed at least it would automatically update the label binding, but the API did not seem to support that.
What's the right coding pattern to use when using straight Java coding?
I know in jgoodies I could do this using the PresentationModel approach or master-detail SWT or WPF with just specifying the property on the item's property that I want in WPF.
public static class MyTreeCell extends TreeCell<Object> {
 Label label;
 public MyTreeCell() {
 label = new Label();
 setNode(label);
 @Override
 public void updateItem(TreeItem<Object> arg0, boolean arg1) {
 if (arg0 != null && arg0.getValue() != null) {
 System.out.println("New value: " + arg0.getValue());
 label.setText(arg0.getValue().toString());
 } else {
 System.out.println("New value is null and this println is called alot, why is that?");
 super.updateItem(arg0, arg1);
 }

Well the presentation model thing worked fine and I have some machinery for the cell factory/cell item to obtain a tree cell based on the domain object type (a template/factory is placed into the properties in the scenegraph hierarchy). But its not smooth yet and the pattern does not quite translate well into javafx. Because the cell factory produces cells that could be used for a variety of domain object types, all the logic gets pushed down to the treecell subclass which makes it messy. Maybe this is where CSS selectors need to come in, you specify the class of a tree cell for a specific domain object type and you can set that at the root of the application so it cascades. I'll see if this approach works.
Here's the code for the javafx version of jgoodies' presentation model, less the corner cases. This allows you to bind to a property and change the bean underneath that the property accesses. I'm not convinced that having properties has observable values directly on the objects is the right model for javafx because of the coupling to the actual object the property represents. Sometimes, you need to represent the property concept separate from the actual object instance. Maybe this already exists in the library.
 * An object binding object that creates object bindings based on property
 * names specified as strings. This is a convenience class. Generally, the
 * return values from <code>getProperty()</code> should be used for binding
 * not the factory itself. The object should be a domain object bean with
 * bean methods to get or set the value using java bean naming conventions.
 * When the bean itself changes, the properties fire to indicate that their
 * values may have changed and the observing object should update itself.
 * 
 * This only handles reading bean properties. Need to add set() logic.
 * 
 * TODO: Make this work better. Many corner cases to cover. Include PCL.
 public static class BeanBindingFactory<T> extends ObjectBinding<T> {
 T bean;
 Map<String, CaptiveObjectProperty> properties = new HashMap<String, CaptiveObjectProperty>();
 public Property getProperty(String property) {
 if (property == null || property.isEmpty())
 throw new IllegalArgumentException("Property cannot be null");
 if (properties.containsKey(property))
 return properties.get(property);
 CaptiveObjectProperty p = new CaptiveObjectProperty(this, property);
 properties.put(property, p);
 return p;
 public void setBean(T bean) {
 this.bean = bean;
 for (CaptiveObjectProperty p : properties.values()) {
 p.invalidate();
 fireValueChangedEvent();
 public T getBean() {
 return bean;
 @Override
 protected T computeValue() {
 return bean;
 * Lazily get the method representing the property.
 * @author Mr. Java
 * @param <T>
 protected static class CaptiveObjectProperty<T> extends
 ObjectPropertyBase<T> {
 String property;
 Method m;
 BeanBindingFactory factory;
 public CaptiveObjectProperty(BeanBindingFactory factory,
 String property) {
 this.property = property;
 this.factory = factory;
 @Override
 public Object getBean() {
 if (factory == null || factory.getBean() == null)
 return null;
 return factory.getBean();
 @Override
 public T getValue() {
 if (m == null) {
 m = getMethod();
 if (m == null)
 return null;
 try {
 Object rval = m.invoke(factory.getBean());
 return (T) rval;
 } catch (Exception e) {
 e.printStackTrace();
 return null;
 @Override
 public String getName() {
 return property;
 * Invalidate the method. Perhaps the bean changed to another object
 * and we should find the method on the new object.
 public void invalidate() {
 m = null;
 fireValueChangedEvent();
 protected Method getMethod() {
 if (factory == null || factory.getBean() == null)
 return null;
 String methodName = "get"
 + Character.toUpperCase(getName().charAt(0));
 if (getName().length() > 1)
 methodName += getName().substring(1);
 try {
 Method mtmp = factory.getBean().getClass()
 .getMethod(methodName, new Class<?>[0]);
 return mtmp;
 } catch (Exception e) {
 e.printStackTrace();
 return null;
 }

How to bind a complex object to a composite component

I'm using JSF2 and having an issue binding an object (EL Expression) as a parameter to my composite component.
I have written a composite component (not very complex) that will display a drop-down list of countries and should bind the selection to a provided target bean.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:composite="http://java.sun.com/jsf/composite"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:a4j="http://richfaces.org/a4j"
xmlns:rich="http://richfaces.org/rich">

<composite:interface>
<composite:attribute name="label" required="true" />
<composite:attribute name="requiredMessage" required="true"/>
<composite:attribute name="target" required="true" type="com.mycompany.entity.Country"/>
</composite:interface>

<composite:implementation>
<h:panelGrid columns="2">
<h:outputLabel for="country-list" value="#{cc.attrs.label}"/>
<h:panelGrid id="country" columns="1" styleClass="select-one-menu-panel" >
<h:selectOneMenu id="country-list"
enabledClass="select-one-menu-enabled" disabledClass="select-one-menu-disabled"
layout="pageDirection"
value="#{cc.attrs.target}"
required="true" requiredMessage="#{cc.attrs.requiredMessage}"
>
<f:selectItem itemLabel="#{msgs['label.pleaseSelect']}" itemValue="" />
<f:selectItems value="#{countryController.countries}" />
<a4j:ajax />
</h:selectOneMenu>
<a4j:outputPanel id="country-list-error-panel" ajaxRendered="true">
<h:message id="country-list-error" for="country-list" style="color:red"/>
</a4j:outputPanel>
</h:panelGrid>
</h:panelGrid>
</composite:implementation>
</html>
I want to be able to use the composite component in the following way:
<util:country-select
label="#{msgs['label.countryOfBirth']}"
requiredMessge="#{msgs['error.birthCountryRequired']}"
target="#{participant.countryOfBirth}"/>
When I load the page everything renders correctly, but when I select an item from the drop-down I get a validation error.
apply-form:j_idt77:country-list: Validation Error: Value is not valid
I know that it must be something with the way that I have the parameters defined but I simply can't find any information to help me figure this out.
Any light that you might be able to she on this would be greatly appreciated.
Thank you for the help...

Hi,
well, you can. What the ADF Data Control and thus the binding gives you is the JSF component binding and the business service access.
If you don't want to use ADF, then what you can do is
- Create an ADF BC root Application Module from a managed bean
e.g. see http://docs.oracle.com/cd/E21764_01/web.1111/b31974/bcservices.htm#CHDDDBFC
- Access the View Object for querying the data to display
- Expose the queried data so the component can handle it e.g. setter/getter for input components, ArrayList for tables (or you create the more complex component models like table and tree models)
Having outlined the above, here are some gotchas to watch out for
- Make sure creating the root application module is done such that you don't create/release it with each request. So you may consider a data serving managed bean in a scope like page flow or session
- Ensure you have helper methods that allow you to query and CRUD operate the View Object data
Frank

How to bind a String object to java:comp/env name space?

Hi, does anybody know how to declare a String as a JNDI object in OC4J V904. I want to register a String named 'Foo' with the value 'val' with JNDI. Eventually I want to get the value of this by referencing this JNDI name:
java:comp/env/ejb/Foo
I don't really care how this is done either by declaring it by way of ejb-jar.xml or a global setting at the application server level.
Please assist!
Thanks
J

There are many possible ways.
- (BEST) Use the J2EE resource environment variable mechanism (ie resource-env-ref in ejb-jar.xml).
- (MEDIUM) Use OC4J startup classes.
- (IF ELSE FAILS) Use the InitialContext.rebind method.

How to bind Hibernate domain objects to the UI layer

Dear All,
I am trying to bind FX UI controls to properties of a Hibernate Domain object. Is there any good example to refer to for this purpose?
Thanks & Regards,
Nitin Gupta

Assuming you do not formulate your hibernate objects as pojos with javafx properties directly, if the hibernate object is a pojo with or without PCL, you can convert the properties of the pojo to observable values (or properties) directly. These are used in a bind statement.
Check out what jgoodies does with BeanAdapter or PresentationModel. You need the same concept. I've attached a class that does this for a pojo already (its an incomplete port of jgoodies PresentationModel). It will work for any pojo. It does not have setter support as it was just a demonstration. Its efficient for a pojo with a large number of properties. You could also write a very short property connector to produce one observable value per property. The value of the class below is to be able to swap out the bean being observed without having to change or reset the property observable values each time. Bind once and then just reset the bean (think master detail).
package scenegraphdemo;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.ObjectPropertyBase;
import javafx.beans.property.Property;
import javafx.beans.property.StringProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.beans.value.WritableValue;
* An object binding object that creates object bindings based on property names
* specified as strings. This is a convenience class to avoid having observable
* values directly dependent on the underlying bean. The actual bean the
* properties connect can be changed dynamically using the channel or
* <code>setBean</code>. This allows you to setup binding when you don't have
* the bean to bind to or the bean to bind to will change as in the detail part
* of a master-detail screen. Generally, the return values from
* <code>getProperty()</code> should be used for binding not the factory itself.
* The object should be a domain object bean with bean methods to get or set the
* value using java bean naming conventions OR it should use javafx property
* definition conventions. The factory will automatically listen for standard
* java bean changes using <code>PropertyChangeListener</code> approaches unless
* you indicate to not to.
* 
* When the bean itself changes, the properties fire to indicate that their
* values may have changed and the observing object should update itself. This
* object allows you to integrate your javafx/POJOs into the binding
* infrastructure without being dependent on the actual underlying bean. If you
* are familiar with jgoodies <code>BindingAdapter</code> this is a similar
* class.
* 
* This only handles reading bean properties. Need to add set() logic.
* 
* TODO: Make this work better. Many corner cases to cover.
* 
* TODO: Instead of just method calls on POJOs, also check for PCL. Note that
* javafx properties won't work easily they are always tied to the underlying
* object so I would have to write another CaptiveObjectProperty object that is
* essentially a delegator.
public class BeanPropertyFactory<T> extends ObjectProperty<T> {
 ObservableValue<T> channel;
 Map<String, CaptiveObjectProperty> properties = new HashMap<String, CaptiveObjectProperty>();
 boolean listenForBeanPCLEvents = true;
 public boolean isListenForBeanPCLEvents() {
 return listenForBeanPCLEvents;
 public void setListenForBeanPCLEvents(boolean listenForBeanPCLEvents) {
 this.listenForBeanPCLEvents = listenForBeanPCLEvents;
 if (getBean() != null)
 removeBeanPCLListener(getBean());
 * The bean channel where the bean is obtained.
 * @return
 public ObservableValue<T> getChannel() {
 return channel;
 public BeanPropertyFactory() {
 setChannel(new ObjectProperty());
 public BeanPropertyFactory(ObservableValue<T> channel) {
 if (channel == null)
 setChannel(new ObjectProperty());
 else
 setChannel(channel);
 protected void setChannel(ObservableValue<T> channel) {
 if (this.channel != null) {
 removeBeanChangeListener(this.channel);
 this.channel = channel;
 if (this.channel != null) {
 addBeanChangeListener(this.channel);
 updateStringProperty(getBean());
 invalidateProperties();
 fireValueChangedEvent();
 protected StringProperty stringProperty = new StringProperty();
 * The string property is an observable toString property. It cannot be set.
 * @return
 public StringProperty beanStringProperty() {
 return stringProperty;
 public String getBeanString() {
 return beanStringProperty().getValue();
 * A listener that listens to changes in the bean channel. This only fires
 * when the bean changes not when the properties on the bean change. The
 * default actions updates the "string" property representation of this
 * object as well as attaches property change listeners.
 * @author Mr. Java
 protected class BeanChangeListener implements ChangeListener {
 @Override
 public void changed(ObservableValue arg0, Object arg1, Object arg2) {
 if (arg1 != null) {
 BeanPropertyFactory.this.removeBeanPCLListener(arg1);
 if (arg2 != null) {
 BeanPropertyFactory.this.addBeanPCLListener(arg2);
 updateStringProperty(arg2);
 protected void updateStringProperty(Object obj) {
 if (obj != null)
 beanStringProperty().setValue(obj.toString());
 else
 beanStringProperty().setValue("null");
 protected void removeBeanChangeListener(ObservableValue<T> obj) {
 if (beanChangeListener == null)
 beanChangeListener = createBeanChangeListener();
 if (obj != null) {
 obj.addListener(beanChangeListener);
 protected void addBeanChangeListener(ObservableValue<T> obj) {
 if (beanChangeListener == null)
 beanChangeListener = createBeanChangeListener();
 if (obj != null)
 obj.removeListener(beanChangeListener);
 * The instance of a change listener for detecting when the bean in the bean
 * channel changes.
 ChangeListener beanChangeListener = new BeanChangeListener();
 * Subclass can override to create their bean change listener.
 * @return
 protected ChangeListener createBeanChangeListener() {
 return new BeanChangeListener();
 public BeanPropertyFactory(T bean) {
 setChannel(new ObjectProperty(bean));
 public Property getProperty(String property) {
 if (property == null || property.isEmpty())
 throw new IllegalArgumentException("Property cannot be null");
 if (properties.containsKey(property))
 return properties.get(property);
 CaptiveObjectProperty p = new CaptiveObjectProperty(this, property);
 properties.put(property, p);
 return p;
 @Override
 public T getValue() {
 return getBean();
 * A listener that listens for property change events on the bean. When the
 * bean changes, the listener must be removed then attached to the new bean
 * but can use the same instance of this class. The action is to inform any
 * existing property objects that the property has changed. The detection of
 * property changes is centralized in the factory class for efficiency.
 protected class BeanPropertyListener implements PropertyChangeListener {
 @Override
 public void propertyChange(PropertyChangeEvent evt) {
 if (properties.containsKey(evt.getPropertyName())) {
 CaptiveObjectProperty p = properties.get(evt.getPropertyName());
 p.propertyChanged();
 updateStringProperty(getBean());
 * The cached listener instance to listen to the bean (in the bean channel)
 * property change events if it supports PCL.
 PropertyChangeListener beanPropertyListener;
 * Subclasses can override to implement their own behavior. Its best to
 * extend from <code>BeanPropertyListiner</code> to include the default
 * behavior.
 * @return
 protected PropertyChangeListener createBeanPropertyListener() {
 return new BeanPropertyListener();
 * Add a listener only if the PCL methods exist. This listens for property
 * changes on the bean's property not changes in the actually bean held by
 * the bean channel.
 protected void addBeanPCLListener(Object obj) {
 if (!isListenForBeanPCLEvents())
 return;
 if (obj != null) {
 if (BeanPropertyUtils.hasPCL(obj.getClass())) {
 if (beanPropertyListener == null)
 beanPropertyListener = createBeanPropertyListener();
 BeanPropertyUtils.addPCL(obj, beanPropertyListener, null);
 * Remove a listener only if the PCL methods exist.
 * @see #attachBeanPCLListener
 protected void removeBeanPCLListener(Object obj) {
 if (obj != null) {
 if (BeanPropertyUtils.hasPCL(obj.getClass())) {
 if (beanPropertyListener == null)
 beanPropertyListener = createBeanPropertyListener();
 BeanPropertyUtils.removePCL(obj, beanPropertyListener, null);
 * Invalidate the properties in the property cache. Then changed the bean in
 * the bean channel. Then fire a value changed event.
 * @param bean
 public void setBean(T bean) {
 invalidateProperties();
 if (getChannel() instanceof WritableValue) {
 ((WritableValue) getChannel()).setValue(bean);
 } else {
 throw new IllegalArgumentException(
 "Could not set bean value into a non-writable bean channel");
 fireValueChangedEvent();
 * Called to indicate that the underlying bean changed.
 protected void invalidateProperties() {
 for (CaptiveObjectProperty p : properties.values()) {
 p.invalidate();
 public T getBean() {
 return getChannel().getValue();
 * Lazily get the method representing the property prior to getting or
 * setting. Because this is a property, it can also be bound to.
 * @author Mr. Java
 * @param <T>
 protected static class CaptiveObjectProperty<T> extends
 ObjectPropertyBase<T> {
 * The string name of the property.
 String readPropertyName, writePropertyName;
 * If the property is really a javafx property, it is stored here.
 Property<T> enhancedProperty;
 * Used if the property is not an enhanced property.
 Method readMethod, writeMethod;
 * The factory that holds the bean we obtain values against.
 BeanPropertyFactory factory;
 public CaptiveObjectProperty(BeanPropertyFactory factory,
 String property) {
 this.readPropertyName = property;
 this.factory = factory;
 public CaptiveObjectProperty(BeanPropertyFactory factory,
 String property, String writePropertyName) {
 this.readPropertyName = property;
 this.writePropertyName = writePropertyName;
 this.factory = factory;
 @Override
 public Object getBean() {
 if (factory == null || factory.getBean() == null)
 return null;
 return factory.getBean();
 @Override
 public void store(T value) {
 if (writeMethod == null && enhancedProperty == null) {
 getWriteMethod(value.getClass());
 if (writeMethod == null && enhancedProperty == null) {
 return;
 try {
 if (enhancedProperty != null) {
 enhancedProperty.setValue(value);
 return;
 if (getBean() == null)
 return;
 writeMethod.invoke(getBean(), value);
 return;
 } catch (Exception e) {
 e.printStackTrace();
 @Override
 public T getValue() {
 if (readMethod == null && enhancedProperty == null) {
 getReadMethod();
 if (readMethod == null && enhancedProperty == null)
 return null;
 try {
 if (enhancedProperty != null)
 return enhancedProperty.getValue();
 if (factory.getBean() == null)
 return null;
 Object rval = readMethod.invoke(getBean());
 return (T) rval;
 } catch (Exception e) {
 e.printStackTrace();
 return null;
 @Override
 public String getName() {
 return readPropertyName;
 * Invalidate the method. Perhaps the bean changed to another object and
 * we should find the method on the new object. This is called prior to
 * the <code>getBean()</code> being changed.
 public void invalidate() {
 readMethod = null;
 fireValueChangedEvent();
 * This is used to externally signal that the property has changed. It
 * is quite possible that this object does not detect those changes and
 * hence, an external object (in all cases the BeanPropertyFactory) will
 * signal when a change occurs. Property change detection is centralized
 * in the factory for efficiency reasons.
 public void propertyChanged() {
 fireValueChangedEvent();
 protected Property getJavaFXReadProperty(String propertyName) {
 if (factory.getBean() == null)
 return null;
 String methodName = getName() + "Property";
 try {
 Method mtmp = factory.getBean().getClass()
 .getMethod(methodName, new Class<?>[0]);
 enhancedProperty = (Property) mtmp.invoke(factory.getBean(),
 new Object[0]);
 return enhancedProperty;
 } catch (Exception e) {
 // e.printStackTrace();
 // silently fail here
 return null;
 protected void getWriteMethod(Class<?> argType) {
 if (factory == null || factory.getBean() == null)
 return;
 if (enhancedProperty == null)
 enhancedProperty = getJavaFXReadProperty(getName());
 if (enhancedProperty != null)
 return;
 writeMethod = getPojoWriteMethod(getName(), argType);
 * Sets the method, either an enhanced property or the POJO method via
 * reflection.
 * @return
 protected void getReadMethod() {
 if (factory == null || factory.getBean() == null)
 return;
 enhancedProperty = getJavaFXReadProperty(getName());
 if (enhancedProperty != null)
 return;
 // Look for standard pojo method.
 readMethod = getPOJOReadMethod(getName());
 * Return a get method using reflection.
 * @param propertyName
 * @return
 protected Method getPOJOReadMethod(String propertyName) {
 if (factory.getBean() == null)
 return null;
 // Look for standard pojo method.
 String methodName = getGetMethodName();
 try {
 Method mtmp = factory.getBean().getClass()
 .getMethod(methodName, new Class<?>[0]);
 return mtmp;
 } catch (Exception e) {
 // silently fail here
 // e.printStackTrace();
 return null;
 protected String getGetMethodName() {
 String methodName = "get"
 + Character.toUpperCase(getName().charAt(0));
 if (getName().length() > 1)
 methodName += getName().substring(1);
 return methodName;
 * Return a set method using reflection.
 * @param propertyName
 * @param argType
 * @return
 protected Method getPojoWriteMethod(String propertyName,
 Class<?> argType) {
 if (factory.getBean() == null)
 return null;
 String methodName = getSetMethodName();
 try {
 Method mtmp = factory.getBean().getClass()
 .getMethod(methodName, argType);
 return mtmp;
 } catch (Exception e) {
 // silently fail here
 // e.printStackTrace();
 return null;
 protected String getSetMethodName() {
 String methodName = "set"
 + Character.toUpperCase(getName().charAt(0));
 if (getName().length() > 1)
 methodName += getName().substring(1);
 return methodName;
 * Obtain a property using the binding path. The binding path should be
 * simple property names separated by a dot. The bean has to specified
 * because the return value is a property that can be used directly for
 * binding. The first property specified in the binding path should be a
 * property on the bean.
 * 
 * The difference between this and <code>Bindings.select()</code> is not
 * much other that it uses the bean factory machinery and the path can be
 * specified as a string. Of course, the bean can be a plain pojo.
 * @param bindingPath
 * @return
 public static Property propertyFromBindingPath(Object bean,
 String bindingPath) {
 if (bindingPath == null || bindingPath.isEmpty())
 return null;
 BeanPropertyFactory lastFactory = null;
 Property lastProperty = null;
 String[] parts = bindingPath.split("\\.");
 if (parts.length > 0) {
 for (int i = 0; i < parts.length; i++) {
 if (parts.length() <= 0 || parts[i].isEmpty()) {
 throw new IllegalArgumentException("Binding path part " + i
 + " has no length");
 BeanPropertyFactory newFactory;
 if (i == 0)
 newFactory = new BeanPropertyFactory(bean);
 else
 newFactory = new BeanPropertyFactory(
 (WritableValue) lastProperty);
 lastProperty = newFactory.getProperty(parts[i].trim());
 lastFactory = newFactory;
 return lastProperty;
 * Alot like <code>Bindings.select</code> but also handles pojos.
 * @param bean
 * @param path
 * @return
 public static Property propertyFromBindingPath(Object bean, String... path) {
 String tmp = "";
 for (int i = 0; i < path.length; i++) {
 tmp += path[i];
 if (i <= path.length - 1)
 tmp += ".";
 return propertyFromBindingPath(bean, tmp);
and a supporting classpackage scenegraphdemo;
import java.beans.PropertyChangeListener;
* Static methods for manipulating PCL for standard java beans.
* @author Mr. Java
public class BeanPropertyUtils {
 protected final static Class<?>[] NO_ARGS = new Class<?>[] { PropertyChangeListener.class };
 protected final static Class<?>[] ARGS = new Class<?>[] { String.class,
 PropertyChangeListener.class };
 protected final static String pclAddMethodName = "addPropertyChangeListener";
 protected final static String pclRemoveMethodName = "removePropertyChangeListener";
 * Return true if the class has PCL methods. Does not check for remove.
 * 
 * addPropertyChangeListener(PropertyChangeListener)
 * 
 * addPropertyChangeListener(String, PropertyChangeListener)
 * @param bean
 * @return
 public static boolean hasPCL(Class<?> clazz) {
 try {
 if (clazz.getMethod(pclAddMethodName, NO_ARGS) != null) {
 return true;
 } catch (Exception e) {
 // silently fail
 try {
 if (clazz.getMethod(pclAddMethodName, ARGS) != null) {
 return true;
 } catch (Exception e) {
 // silently fail
 return false;
 * Add a listener.
 * @param bean
 * @param listener
 * @param propertyName
 public static void addPCL(Object bean, PropertyChangeListener listener,
 String propertyName) {
 try {
 if (propertyName == null) {
 bean.getClass().getMethod(pclAddMethodName, NO_ARGS)
 .invoke(bean, new Object[] { listener });
 } else {
 bean.getClass()
 .getMethod(pclAddMethodName, ARGS)
 .invoke(bean,
 new Object[] { propertyName, listener });
 } catch (Exception e) {
 e.printStackTrace();
 * Remove a listener.
 * @param bean
 * @param listener
 * @param propertyName
 public static void removePCL(Object bean, PropertyChangeListener listener,
 String propertyName) {
 try {
 if (propertyName == null) {
 bean.getClass().getMethod(pclRemoveMethodName, NO_ARGS)
 .invoke(bean, new Object[] { listener });
 } else {
 bean.getClass()
 .getMethod(pclRemoveMethodName, ARGS)
 .invoke(bean,
 new Object[] { propertyName, listener });
 } catch (Exception e) {
 e.printStackTrace();

How to make a field Identity in Access Database

Hi All,
Attached is the screenshot which has a split form and if we are in the middle of entering a new record in the datasheet below it creates a new record already and gives the same ID to the next one,so while entering the next record the number again will be
7 instead of 8. However if i make the form a single form instead of a split form it works fine.
My code for Default Value of "ClaimRecoveryID" is
=IIf(IsNull(DLookUp("Max([ClaimRecoveryID]) + 1 ","[ClaimRecovery]")),1,DLookUp("Max([ClaimRecoveryID]) + 1 ","[ClaimRecovery]")) ( where ClaimRecovery is the name of the table and i think its giving
the next record as the 7 is not yet in the system. Can someone please help me on how to change my code.

To do that, you would need to assign the number before saving the record. As I mentioned, that is not a good idea in a multi-user environment.
If one user starts a record and you immediately assign the new number, it is not saved yet. Then another user starts a new record they would be assigned the same number, because that number will not yet exist in the table. Before saving the record, you could
check to see if the number already exists and change it, but that would defeat your purpose of displaying it immediately. The user would see 9 and it would change to 10.
If multi-user is not a problem, then move the line Me!ClaimRecoveryID = nz(DMax("ClaimRecoveryID", "ClaimRecovery"),0)+1 to the before insert event of the form.
I am also guessing that you are using this method of generating the number because you don't want any gaps in the numbering sequence. Should that not be the case, then simply change the field to an autonumber and you won't need any code. However, there will
eventually be gaps in the numbering sequence.

How to bind "Image Field" object on a database

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