Create Namespace : Namespace « XML « Java Tutorial






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 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import javax.xml.XMLConstants;

import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
/**
 * Few simple utils to read DOM. This is originally from the Jakarta Commons Modeler.
 * 
 * @author Costin Manolache
 */
public class Utils {
  private static final String XMLNAMESPACE = "xmlns";
  public static String createNamespace(Element el, String ns) {
    String p = "ns1";
    int i = 1;
    while (getPrefix(el, ns) != null) {
        p = "ns" + i;
        i++;
    }
    el.setAttribute(XMLNAMESPACE + ":" + p, ns);
    return p;
}
  public static String getPrefix(Element el, String ns) {
    NamedNodeMap atts = el.getAttributes();
    for (int i = 0; i < atts.getLength(); i++) {
        Node node = atts.item(i);
        String name = node.getNodeName();
        if (ns.equals(node.getNodeValue())
            && (name != null && (XMLNAMESPACE.equals(name) || name.startsWith(XMLNAMESPACE + ":")))) {
            return node.getPrefix();
        }
    }
    return null;
}
}








33.26.Namespace
33.26.1.Access elements from document with namespaces
33.26.2.Handling namespaces during parsing
33.26.3.Create Namespace
33.26.4.Get Attribute by QName
33.26.5.Set a namespace/prefix on an element if it is not set already.
33.26.6.Get all prefixes defined on this element for the specified namespace.
33.26.7.Get all prefixes defined, up to the root, for a namespace URI.
33.26.8.Creates a QName instance from the given namespace context for the given qualifiedName
33.26.9.Starting from a node, find the namespace declaration for a prefix.
33.26.10.Returns the first element that has the specified local name.
33.26.11.Checks whether the supplied String is an NCName (Namespace Classified Name)
33.26.12.Finds and returns the first child node with the given qualified name.
33.26.13.Finds and returns the last child node with the given qualified name.
33.26.14.Finds and returns the next sibling node with the given qualified name.