Exception using DOMResult

[David Frankson]

I'm having problems getting an xml Document as the result of a transformation.  I get a sax exception - Can't have more than one root on a DOM!   If I use any other result type, Xalan works fine and I get the output I expect.  I double-checked both input files and the output, and everything is well formed.  I think it has to do with how I'm building the xml source.   I have business logic that returns an xml Document, and then I use Xalan and a xsl page to transform it.  I want to keep it as a Document so that I can pass it on to FOP.  When the business logic builds the dom, I use the DOM Level III command adoptNode implemented by Xerces 1.4.2.  Is it possible that this method returns the dom in a slightly different format than xalan expects?  When I use this method and use a StreamResult everything works fine, but a DOMResult throws an exception.   Does anyone know more about how the DOMResult is built and why this exception would occur?  Or could you suggest a work-around -- Is there a better way to combine two Document objects than use adoptNode?   Thanks,   Dave Frankson     org.xml.sax.SAXException: Can't have more than one root on a DOM! at org.apache.xml.utils.DOMBuilder.append(DOMBuilder.java:203) at org.apache.xml.utils.DOMBuilder.startElement(DOMBuilder.java:308) at org.apache.xalan.transformer.ResultTreeHandler.flushElem(ResultTreeHandler.java:843) at org.apache.xalan.transformer.ResultTreeHandler.flushPending(ResultTreeHandler.java:914) at org.apache.xalan.transformer.ResultTreeHandler.endElement(ResultTreeHandler.java:298) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:668) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:423) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:226) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:423) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:226) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:423) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:226) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:423) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:226) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2096) at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:1927) at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1120) at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:590) at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1037) at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1015)