msv.msv.examples.schemaLookup.NamespaceScanner Maven / Gradle / Ivy

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/*
 * @(#)$Id: NamespaceScanner.java 1597 2003-09-04 20:37:30Z kohsuke $
 *
 * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * This software is the proprietary information of Sun Microsystems, Inc.  
 * Use is subject to license terms.
 * 
 */
package schemaLookup;

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

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

/**
 * Enumerates all the namespaces from a DOM tree.
 * 
 * @author
 *     Kohsuke Kawaguchi ([email protected])
 */
public final class NamespaceScanner {
    public static void scan( Document d, NamespaceReceiver r ) {
        scan(d.getDocumentElement(),r);
    }
    public static void scan( Element e, NamespaceReceiver r ) {
        new NamespaceScanner(r).scan(e);
    } 
    
    private final Set nss = new HashSet();
    private final NamespaceReceiver receiver;
    
    private NamespaceScanner( NamespaceReceiver r ) {
        this.receiver = r;
        // xmlns
        nss.add("http://www.w3.org/2000/xmlns/");
    }
    
    private void scan( Element e ) {
        onNamespace(e.getNamespaceURI());
        
        NamedNodeMap atts = e.getAttributes();
        for( int i=0; i