Figure 2 Component Integration Technologies
Feature |
XML |
COM |
Java |
CORBA |
In-memory interoperation |
None |
Object references are C++-style VPTRs |
Virtual machine-specific object representation, standard code representation |
None |
Source code interoperation |
W3C DOM (recommendation only), SAX, and so on |
The COM API |
The Java programming language |
The POA and ORB object interfaces |
Text-based type information interoperation |
DTDs (legacy) XML Schemas/XML Data (future) |
COM IDL |
The Java programming language |
OMG IDL |
Binary type information interoperation |
Same as text-based type information |
Type libraries |
.class files |
None |
API-level type information interoperation |
None for DTDs, DTD replacement will just be XML, so any XML parser will work |
LoadTypeLib, ITypeLib, and so on |
java.lang.reflect |
Interface repository |
Wire interoperation |
XML (over HTTP, raw TCP, or message-based protocols) |
DCOM (DCE-based) over raw TCP, SPX, and so on |
RMI/JRMP, RMI/IIOP, or RMI/HTTP |
IIOP over raw TCP |