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package com.sun.xml.bind.v2.runtime;

import java.util.HashSet;
import java.util.Set;

import javax.xml.XMLConstants;

import org.w3c.dom.Attr;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

/**
 * Post-init action for {@link MarshallerImpl} that incorporate the in-scope namespace bindings
 * from a DOM node.
 *
 * TODO: do we really need this? think about a better way to put this logic back into marshaller.
 *
 * @author Kohsuke Kawaguchi
 */
final class DomPostInitAction implements Runnable {

    private final Node node;
    private final XMLSerializer serializer;

    DomPostInitAction(Node node, XMLSerializer serializer) {
        this.node = node;
        this.serializer = serializer;
    }

    // declare the currently in-scope namespace bindings
    public void run() {
        Set declaredPrefixes = new HashSet();
        for( Node n=node; n!=null && n.getNodeType()==Node.ELEMENT_NODE; n=n.getParentNode() ) {
            NamedNodeMap atts = n.getAttributes();
            if(atts==null)      continue; // broken DOM. but be graceful.
            for( int i=0; i