Re: large XML files

From:
=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>
Newsgroups:
comp.lang.java.programmer
Date:
Sun, 07 Feb 2010 16:35:12 -0500
Message-ID:
<4b6f3203$0$282$14726298@news.sunsite.dk>
On 07-02-2010 15:31, Lew wrote:

On 2/7/2010 1:20 PM, Donkey Hottie wrote:

On 7.2.2010 20:14, Peter Duniho wrote:

Roedy Green wrote:

It seems to me the usual XML tools in Java load the entire XML file
into RAM. Are there any tools that process sequentially, bringing in
only a chunk at a time so you could handle really fat files.


Sounds like you want the XMLStreamReader interface:
http://java.sun.com/javase/6/docs/api/javax/xml/stream/XMLStreamReader.html

I haven't used the Java version myself (there's a similar type in .NET),
and haven't looked closed to determine the specifics. But I presume
there's a way to get an implementation of the interface (looks like
XMLInputFactory is the way to go).

Of course, if per a previous discussion you're stuck on Java 1.5, this
is unavailable to you. But otherwise, you should find it exactly what
you're asking for.

Pete


SAX interface works fine even with Java 1.4, and it does what Roedy
wants.


It's been around since Java 1.2; it better work with 1.4.


Yes and no.

SAX was added to Java API in 1.4.

JAXP API including SAX existed earlier than Java 1.4 and
libraries implementing it could be separately downloaded.

I have done the latter for Java 1.3 and it may have
existed already for 1.2.

Arne

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