java class not found in cf code

J'd like to manage libreooffice api for replace text in odf.

i've done a running java cfx but when i transate to cf sintax i get an error

this is the working java/cfx code

com.sun.star.util.XReplaceable xReplaceable = null;

com.sun.star.util.XReplaceDescriptor xReplaceDescr = null;

xReplaceable = UnoRuntime.queryInterface(com.sun.star.util.XReplaceable.class, xTextDocument);

xReplaceDescr = xReplaceable.createReplaceDescriptor();

and this is the cf code

<cfset xReplaceable = CreateObject("java", "com.sun.star.util.XReplaceable")>

<cfset xReplaceableClass = xReplaceable.getClass()>

<cfset xReplaceable = UnoRuntime.queryInterface(XTextDocumentClass, xTextDocument)>

<cfset xReplaceDescr = xReplaceable.createReplaceDescriptor()>

the error is in the last line

class not found: com.sun.star.util.XReplaceable.createReplaceDescriptor

any ideas?