Uniting NodeLists in DOM (java) -


here's code:

private nodelist union(nodelist left, nodelist right){      nodelist result=null;     try{         documentbuilderfactory domfactory = documentbuilderfactory.newinstance();         domfactory.setnamespaceaware(true); // never forget this!          documentbuilder newbuilder = domfactory.newdocumentbuilder();         document newdoc = newbuilder.newdocument();          element root = newdoc.createelement("root");         newdoc.appendchild(root);         if(left!=null){             for(int i=0;i<left.getlength();i++){                 node tmp=(node)left.item(i).clonenode(true);                 newdoc.adoptnode(tmp);                 newdoc.getdocumentelement().appendchild(tmp);                 //root.appendchild(newdoc.importnode((node)left.item(i), true));             }         }         if(right!=null){             for(int i=0;i<right.getlength();i++){                 node tmp=(node)right.item(i).clonenode(true);                 newdoc.adoptnode(tmp);                 newdoc.getdocumentelement().appendchild(tmp);                 //root.appendchild(newdoc.importnode((node)right.item(i), true));             }         }          result=root.getchildnodes();     } catch(parserconfigurationexception e){         system.err.println(e);     }      return result; }

in code i'm trying unite 2 nodelists one.

it works well, except fact after union, nodes loses context of parent, ancestor, preceding-sibling etc... if i'm trying run evaluate on result , use parent/ansector/preceding-sibling/etc axis on result, fails.

what should in order won't lose it?

thanks.

a node can exist in 1 document. if want copied node in both documents you're out of luck. can create new node in target document , move children , attributes old node new node. @ document::adoptnode(node) might easiest way that.


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