Re: Validating XML with an external DTD

From:

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>

Newsgroups:

comp.lang.java.programmer

Date:

Fri, 03 Aug 2007 23:01:42 -0400

Message-ID:

<46b3ec06$0$90269$14726298@news.sunsite.dk>

salimk786 wrote:

Okay, a wrapper class, so how would i do this ? Can you give me some
direction please. I'm still learning java. Much appreciated.

The following is far from product quality but it should give
you an idea:

Document doc = db.parse(new FakeInputStream("C:\\medarbejder_nodtd.xml",
"<?xml version=\"1.0\" encoding=\"iso-8859-1\" standalone=\"no\"?>\r\n",
"<!DOCTYPE medarbejderliste SYSTEM \"medarbejder.dtd\">\r\n"));

where:

class FakeInputStream extends InputStream {
     private static final int F = 1;
     private static final int X = 2;
     private static final int D = 3;
     private InputStream f;
     private InputStream x;
     private InputStream d;
     private int mode;
     public FakeInputStream(String xmlfnm, String xmldecl, String
doctyp) throws IOException {
         f = new FileInputStream(xmlfnm);
         while(f.read() != '\n');
         x = new ByteArrayInputStream(xmldecl.getBytes());
         d = new ByteArrayInputStream(doctyp.getBytes());
         mode = X;
     }
     public int read() throws IOException {
         int c = -1;
         switch(mode) {
         case X:
             c = x.read();
             if(c < 0) {
                 mode = D;
                 c = d.read();
             }
             break;
         case F:
             c = f.read();
             break;
         case D:
             c = d.read();
             if(c < 0) {
                 mode = F;
                 c = f.read();
             }
             break;
         }
         return c;
     }
}

Arne