import mx.utils.ObjectProxy;
import mx.controls.Alert;
...
var o1:Object = { f1:"test", f2:123 };
var o2:Object = new ObjectProxy(o1);
var o3:Object = ObjectProxy(o2).object;
Alert.show("Real object: "+o3);

Solution is pretty simple. To access the original object, you need to use special namespaced property and  special code handling. Here is a sample:

import mx.utils.ObjectProxy;
import mx.utils.object_proxy;
import mx.controls.Alert;
...
var o1:Object = { f1:"test", f2:123 };
var o2:Object = new ObjectProxy(o1);
var o3:Object = ObjectProxy(o2).object_proxy::object;
Alert.show("Real object: "+o3);

[ERROR] Could not resolve <mx:AdvancedDataGrid> to a component implementation 

This happened after adding  <mx:AdvancedDataGrid> component to project mxml file. In Flex Builder all compiled fine, but build with maven failed. After spending some time with google, i’ve found the root of a problem.  The problem is that  this component isn’t included in Flex SDK, that was installed in my repository.  The files needed for successful compilation are ‘datavisualization.swc’ and ‘datavisualization_rb.swc’. So i took these files from Flex SDK version 3.2 and installed two artifacts to maven repository:

 mvn install:install-file -DgroupId=com.adobe.flex.sdk -DartifactId=datavisualization -Dversion=3.2.0.3958 -Dpackaging=swc -Dfile=datavisualization.swc
mvn install:install-file -DgroupId=com.adobe.flex.sdk -DartifactId=datavisualization_rb -Dversion=3.2.0.3958 -Dclassifier=en_US -Dpackaging=swc -Dfile=datavisualization_rb.swc

And added two dependencies to project pom.xml:

<dependency>
<groupId>com.adobe.flex.sdk</groupId>
<artifactId>datavisualization</artifactId>
<version>${flex.sdk.version}</version>
<type>swc</type>
</dependency>
<dependency>
<groupId>com.adobe.flex.sdk</groupId>
<artifactId>datavisualization_rb</artifactId>
<version>${flex.sdk.version}</version>
<type>swc</type>
<classifier>en_US</classifier>
</dependency>

That’s all, hope it will be helpful for somebody.

System.setProperty("http.proxySet", "true");
System.setProperty("http.proxyHost", "name_of_proxy_server");
System.setProperty("http.proxyPort", "proxy_server_port_number");

This project’s purpose is to make it easier to build Spring-powered Rich Internet Applications using Adobe Flex as the front-end client. It aims to achieve this purpose by providing first-class support for using the open source Adobe BlazeDS project and its powerful remoting and messaging facilities in combination with the familiar Spring programming model.

More details and download is available on http://www.springsource.org/node/1499

For anyone who is just starting to explore the world of Spring-powered RIAs, be sure to check out Using Spring BlazeDS Integration 1.0 for an introduction and to get up and running.

mvn dependency:sources

If you are creating project for Eclipse and want source files to be included to the project, you can run this one:

mvn eclipse:eclipse -DdownloadSources

More info: http://sourceforge.net/projects/flexformatter/