java technology and .net ui interoperability: how to mix and match

2007 JavaOneSM Conference | Session TS-3888 |

Java™ Technology and .NET UI Interoperability: How to Mix and Match UI Components

Wayne Citrin, JNBridge

Robert Bell, Microsoft

TS-3888

2007 JavaOneSM Conference | Session TS-3888 | 2

Outline

• Why Interop?• Types of Interop• .NET UI Technologies• UI Interop Using Java™ Native Interface (JNI™)• UI Interop Using Bridging• Summary and Conclusion


What Is Interop?

• Interoperability enables communication, data exchange, or program execution among various systems in a way that requires the user to have little or no awareness of the underlying operations of those systems

ISO Information Technology


Why Interop? Business Reasons

• Business moves quickly• Technology moves quickly• Buy for competitive parity, build for competitive

advantage, interoperate for?• Pragmatic• Cost


Why Interop? Technical Reasons

• Most enterprises and ISVs either have or support both technologies

• Benefits• Re-use• Delivery based on technical merit

• Interop is more that Java technology and .NET• SharePoint, Office 2007, SQL Server reporting

services, BizTalk, etc.


Types of Interop—Tiers

• Presentation• Application• Resource

• Shared database• Asynchronous• Messaging


Types of Interop—Presentation Tier

• Web• Axis, JavaServer Pages™ (JSP™) technology,

and servlets• AJAX, ASP.NET

• Smart Client• Applet, Java application• Winforms• WPF• Silverlight


Types of Interop—Presentation Tier

• Business requirement: To replace or extend an existing presentation tier by using the technology of a different platform, or to integrate an application written to a different platform with an existing presentation tier

• Business benefits: Allows selection of the presentation tier based on the best overall user experience, regardless of technology


Types of Interop—Presentation Tier Web Services

JavaTechnology

.NET JavaTechnology

.NETPresentation Tier

Application Tier


Types of Interop—.NET UI Technologies

• Windows Forms (WinForms)• Windows Presentation Foundation (WPF)• Silverlight (WPF/E)


UI Interoperability Matrix

Host.NET Java Technology

WinForms WPF AWT Swing SWT

Embedded

.NETWinForms Y N Y

WPF ? N ?

JavaTechnology

AWT Y YSwing N NSWT ? ?


UI Interop Using JNI Implementation

• Calling the JNI API invocation interface from .NET

• Peers and Windows handles• Cross-platform parent-child assignments• Demo: Embedding Java code in .NET


Calling JNI API InvocationInterface From .NET

• .NET is managed, JNI implementation is unmanaged

• Call through a “hybrid” dll

C++

Unmanaged

JavaTechnology

JNI

API

Hybrid dll (C++ only)

C++

Managed

C#

Managed


Calling Invocation InterfaceC#

Managed C++

Managed C++

Unmanaged C++

JavaCode


Peers

What about Swing?

Java component

Win32 window


Window Handles

…

HandleHandle Table

Object


Obtaining the Peer’s Handle1) Surround Java component with Frame


Obtaining the Peer’s HandleGet handle of frame’s drawing surface

Java Code

Unmanaged C++


Set .NET Form as Parentof Java Component


DemoJava Technology in .NET


UI Interop Using Bridging

• Bridging• Wrappers• Demo: Java technology in .NET• Demo: .NET in Java technology


Bridging

InternetInternetIntranetIntranet

SocketSocket--based based TCP/Binary TCP/Binary

Communications Communications ChannelChannel

JNBridgePro Runtime

Component

Java Technology Side

User Java Code

User .NETCode

SharedMemory

Communications Channel

JNBridgePro Runtime

Component

.NET Side

Process

Machine


Wrappers: Java Technology in .NET

Proxied JavaUI component

JavaControl .NET wrapper

.NET WPF app

JavaUI component

extends UserControl


Wrappers: .NET in Java Technology

DotNetControl or DotNetSWTControl wrapper

Extends Canvas or Composite

AWT or SWT app

.NETUI Component

Proxied .NETUI Component


DemoJava Technology in .NET


Demo.NET in Java Technology


Summary and Conclusion

• Variety of reasons for Java technology/ .NET interop

• UI interop• Mix and match most appropriate components

for the task• Make your Java components available to .NET users

• Techniques• JNI implementation• Bridging


Java™ Technology and .NET UI Interoperability: How to Mix and Match UI Components

Wayne Citrin, JNBridge

Robert Bell, Microsoft

TS-3888

java technology and .net ui interoperability: how to mix and match

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