[Java]How to get java.awt.Component from OOo Window?

[hawkx]

According to OOo API references, I could get a system-specific window handle from XSystemDependentWindowPeer.getWindowHandle, for java.awt.Component object, using com.sun.star.lang.SystemDependent.SYSTEM_JAVA as value of "SystemType" parameter.
Actually, I can get Windows window handle when using com.sun.star.lang.SystemDependent.WIN32, but every time I using com.sun.star.lang.SystemDependent.SYSTEM_JAVA, it returns <Empty>.
How to get java.awt.Component object from OOo window? Or it was impossible?

My purpose was to show a Swing modal dialog in OOo, I also kown that I can show a OOo modal dialog while my non-modal dialog running, but it was not the test.

Thanks in any advice.