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package com.deltaxml.test.saxon;
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import java.io.StringReader;
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import java.util.List;
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import java.util.stream.Collectors;
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import java.util.stream.IntStream;
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import javax.xml.transform.stream.StreamSource;
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import net.sf.saxon.om.FingerprintedQName;
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import net.sf.saxon.om.NamePool;
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import net.sf.saxon.om.StructuredQName;
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import net.sf.saxon.om.TreeModel;
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import net.sf.saxon.s9api.DocumentBuilder;
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import net.sf.saxon.s9api.Processor;
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import net.sf.saxon.s9api.SaxonApiException;
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import net.sf.saxon.s9api.Serializer;
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import net.sf.saxon.s9api.XdmNode;
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import net.sf.saxon.tree.linked.DocumentImpl;
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import net.sf.saxon.tree.linked.ElementImpl;
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public class SaxonLinkedTreeSample {
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public static void buildLinkedTree(boolean well) throws SaxonApiException {
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String skeleton = "<wrapper></wrapper>";
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Processor p = new Processor(true);
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DocumentBuilder b = p.newDocumentBuilder();
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b.setTreeModel(TreeModel.LINKED_TREE);
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XdmNode src1 = b.build(new StreamSource(new StringReader(skeleton)));
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if(well) {
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addChildrenWell((DocumentImpl) src1.getUnderlyingNode(), 2);
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}
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else {
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addChildrenBadly((DocumentImpl) src1.getUnderlyingNode(), 2);
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}
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Serializer ser = p.newSerializer();
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ser.setOutputProperty(Serializer.Property.INDENT, "yes");
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ser.setOutputStream(System.out);
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ser.serializeNode(src1);
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}
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private static void addChildrenBadly(DocumentImpl d, int width) {
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addChildrenBadly(d.getNamePool(), d.getDocumentElement(), width);
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}
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private static void addChildrenWell(DocumentImpl d, int width) {
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addChildrenWell(d.getNamePool(), d.getDocumentElement(), width);
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}
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private static final String ChildName = "Child";
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private static void addChildrenWell(NamePool context, ElementImpl e, int width) {
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List<ElementImpl> children= IntStream.range(1, width+1).mapToObj(i->{
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ElementImpl c = createLinkedTreeElement(context, ChildName+"-"+i);
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return c;
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}).collect(Collectors.toList());
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if(!children.isEmpty()) {
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ElementImpl head = children.remove(0);
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ElementImpl[] h = { head };
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e.insertChildren(h, true, true); //?Bug in saxon, cleanUpChildren(NodeImpl[]) must be called to set the siblings up, but adding them all in on go does not do this :-)
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e.insertChildren(children.toArray(new ElementImpl[children.size()]), false, true);
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}
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}
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private static void addChildrenBadly(NamePool context, ElementImpl e, int width) {
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List<ElementImpl> children= IntStream.range(1, width+1).mapToObj(i->{
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ElementImpl c = createLinkedTreeElement(context, ChildName+"-"+i);
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return c;
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}).collect(Collectors.toList());
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e.insertChildren(children.toArray(new ElementImpl[children.size()]), false, true);
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}
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private static ElementImpl createLinkedTreeElement(NamePool context, String name) {
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ElementImpl e = new ElementImpl();
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e.setNodeName(new FingerprintedQName(new StructuredQName("", "", name), context));
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return e;
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}
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public static void main(String[] args) throws SaxonApiException {
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boolean doWell = args.length==0 || "well".equals(args[0]);
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buildLinkedTree(doWell);
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}
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}
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