Re: [bdbxml] XMLInputStreams and regular InputStreams and w3c DOM objects.

I see this as difficult because the class isn't really an InputStream
but more or less a handle on a C InputStream. I can read from the stream
in java (C++ --> Java) when accessing the contents of the container but
I'm not sure if I can have the XMLContainer read the inputstream from
Java (Java --> C++) without actually having to subclass the C++ version
of XMLInputStream?

> XmlInputStream is a pure virtual interface. In C++, you can subclass
> XmlInputStream, and pass an instance of your class to any of the
> methods that take it as a parameter, such as
> XmlContainer.putDocument(com.sleepycat.dbxml.XmlDocument,
> com.sleepycat.dbxml.XmlUpdateContext). This is especially useful for
> streaming XML from an application directly into Berkeley DB XML
> without first converting it to a string.

Does this mean I can Implement XMLInputStream in Java and use it there, 
or I have to Implement it in C++ and instantiate it using a JNI/SWIG the 
way that they are created using XMLManager?

>   public XmlInputStream createURLInputStream(String baseId, String systemId) throws XmlException {
>     long cPtr = dbxml_javaJNI.XmlManager_createURLInputStream__SWIG_1(swigCPtr, baseId, systemId);
>     return (cPtr == 0) ? null : new XmlInputStream(cPtr, false);
>   }

-Mark Diggory


Ingo Lütkebohle wrote:
> I've never tested it in Java but in C++, you can easily subclass 
> XmlInputStream and implement custom I/O.  Implementing the Interface
> on top of a regular Java InputStream should be possible, too.
> 
> On 9/25/05, *Mark R. Diggory* <mdiggory-Mahy8Y1M33PaZwrp7/[email protected] 
> <mailto:mdiggory-Mahy8Y1M33PaZwrp7/[email protected]>> wrote:
> 
> I'm looking to see if there is a way that I can take a pre-existing 
> java.io.InputStream in Java and place its contents in bdbxml. I 
> understand that I can create "XMLInputStreams" to the Database, but 
> these are not true InputStreams. Its clear that there is no
> capability to Stream my content directly through the Java API (that
> the Java API is just providing handles on the native streams, but no
> access to them) unless I've missed something.
> 
> Is there any way I can read my java.io.InputStream into the db
> without putting all the contents in a String or tmp file?
> 
> -Mark
> 
> 
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