Appending a DocumentFragment to XMLDocument

Question

I've been having a surprisingly difficult time trying to do this simple thing: append a DocumentFragment to an XMLDocument.
Here is my method; there are several print statements in here for debugging:
* This method joins two XML elements to form a single XML document: the individual
* SDI element, in an XMLDocument, and the non-SDI parts of the record, in a
* DocumentFragment. The method assumes that each element has just one child node
* containing the value. Also assumed is a class object, inputroot, which is a
* Node that is the root element of an XMLDocument.
private void joinSDI(XMLDocument sdidoc, DocumentFragment frag)
NodeList nonSdiNodeList = frag.getChildNodes();
Node tempRecRoot = sdidoc.getDocumentElement();
if (DEBUG3)
System.out.println("length of node list = "+nonSdiNodeList.getLength());
for (int i = 0; i < nonSdiNodeList.getLength(); i++)
System.out.println("iteration "+i);
Node node = nonSdiNodeList.item(i);
Node n = node.getFirstChild(); // this is the SDI
System.out.println("source name = " + node.getNodeName());
System.out.println("source value = " + n.getNodeValue());
Node tempNode = sdidoc.createTextNode(n.getNodeName());
tempNode.setNodeValue(n.getNodeValue());
System.out.println("new node type = " + tempNode.getNodeType());
System.out.println("new node name = " + tempNode.getNodeName());
System.out.println("new node value = " + tempNode.getNodeValue());
tempRecRoot.appendChild(tempNode);
// Now append this record XML doc to the insertion document we are building.
System.out.println("the constructed input doc:");
try {
sdidoc.print(System.out);
catch (IOException e)
System.out.println("Caught IO parse exception : "+e.getMessage());
this.inputroot.appendChild(sdidoc);
return;
Here is the input xml doc:
<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
<!DOCTYPE hydro SYSTEM "hydro.dtd">
<hydro>
<ROW num="1">
<HM_SITE_CODE>HDMLC</HM_SITE_CODE>
<HM_PCODE>TRACE</HM_PCODE>
<DATE_HOUR>14-APR-00 12:00:00</DATE_HOUR>
<VALUE>644.039978</VALUE>
<SOURCE_ID>4</SOURCE_ID>
<VALIDATION>Z</VALIDATION>
</ROW>
<ROW num="2">
<HM_SITE_CODE>HDMLC</HM_SITE_CODE>
<HM_PCODE>TRACE</HM_PCODE>
<DATE_HOUR>14-APR-00 13:00:00</DATE_HOUR>
<VALUE>111</VALUE>
<SOURCE_ID>4</SOURCE_ID>
<VALIDATION>Z</VALIDATION>
</ROW>
<ROW num="3">
<HM_SITE_CODE>HDMLC</HM_SITE_CODE>
<HM_PCODE>TRACE</HM_PCODE>
<DATE_HOUR>14-APR-00 14:00:00</DATE_HOUR>
<VALUE>333</VALUE>
<SOURCE_ID>4</SOURCE_ID>
<VALIDATION>Z</VALIDATION>
</ROW>
</hydro>
Here is what I get for output (including the debugging statements):
null

Answer 1

I've been having a surprisingly difficult time trying to do this simple thing: append a DocumentFragment to an XMLDocument.
Here is my method; there are several print statements in here for debugging:
* This method joins two XML elements to form a single XML document: the individual
* SDI element, in an XMLDocument, and the non-SDI parts of the record, in a
* DocumentFragment. The method assumes that each element has just one child node
* containing the value. Also assumed is a class object, inputroot, which is a
* Node that is the root element of an XMLDocument.
private void joinSDI(XMLDocument sdidoc, DocumentFragment frag)
NodeList nonSdiNodeList = frag.getChildNodes();
Node tempRecRoot = sdidoc.getDocumentElement();
if (DEBUG3)
System.out.println("length of node list = "+nonSdiNodeList.getLength());
for (int i = 0; i < nonSdiNodeList.getLength(); i++)
System.out.println("iteration "+i);
Node node = nonSdiNodeList.item(i);
Node n = node.getFirstChild(); // this is the SDI
System.out.println("source name = " + node.getNodeName());
System.out.println("source value = " + n.getNodeValue());
Node tempNode = sdidoc.createTextNode(n.getNodeName());
tempNode.setNodeValue(n.getNodeValue());
System.out.println("new node type = " + tempNode.getNodeType());
System.out.println("new node name = " + tempNode.getNodeName());
System.out.println("new node value = " + tempNode.getNodeValue());
tempRecRoot.appendChild(tempNode);
// Now append this record XML doc to the insertion document we are building.
System.out.println("the constructed input doc:");
try {
sdidoc.print(System.out);
catch (IOException e)
System.out.println("Caught IO parse exception : "+e.getMessage());
this.inputroot.appendChild(sdidoc);
return;
Here is the input xml doc:
<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
<!DOCTYPE hydro SYSTEM "hydro.dtd">
<hydro>
<ROW num="1">
<HM_SITE_CODE>HDMLC</HM_SITE_CODE>
<HM_PCODE>TRACE</HM_PCODE>
<DATE_HOUR>14-APR-00 12:00:00</DATE_HOUR>
<VALUE>644.039978</VALUE>
<SOURCE_ID>4</SOURCE_ID>
<VALIDATION>Z</VALIDATION>
</ROW>
<ROW num="2">
<HM_SITE_CODE>HDMLC</HM_SITE_CODE>
<HM_PCODE>TRACE</HM_PCODE>
<DATE_HOUR>14-APR-00 13:00:00</DATE_HOUR>
<VALUE>111</VALUE>
<SOURCE_ID>4</SOURCE_ID>
<VALIDATION>Z</VALIDATION>
</ROW>
<ROW num="3">
<HM_SITE_CODE>HDMLC</HM_SITE_CODE>
<HM_PCODE>TRACE</HM_PCODE>
<DATE_HOUR>14-APR-00 14:00:00</DATE_HOUR>
<VALUE>333</VALUE>
<SOURCE_ID>4</SOURCE_ID>
<VALIDATION>Z</VALIDATION>
</ROW>
</hydro>
Here is what I get for output (including the debugging statements):
null