Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * 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 org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

public class Main {
    public static final String XMLNS_NS = "http://www.w3.org/2000/xmlns/";

    /**
     * Set a namespace/prefix on an element if it is not set already. First off,
     * it searches for the element for the prefix associated with the specified
     * namespace. If the prefix isn't null, then this is returned. Otherwise, it
     * creates a new attribute using the namespace/prefix passed as parameters.
     *
     * @param element
     * @param namespace
     * @param prefix
     * @return the prefix associated with the set namespace
     */
    public static String setNamespace(Element element, String namespace, String prefix) {
        String pre = getPrefixNS(namespace, element);
        if (pre != null) {
            return pre;
        }
        element.setAttributeNS(XMLNS_NS, "xmlns:" + prefix, namespace);
        return prefix;
    }

    public static String getPrefixNS(String uri, Node e) {
        while (e != null && e.getNodeType() == Node.ELEMENT_NODE) {
            NamedNodeMap attrs = e.getAttributes();
            for (int n = 0; n < attrs.getLength(); n++) {
                Attr a = (Attr) attrs.item(n);
                String name = a.getName();
                if (name.startsWith("xmlns:") && a.getNodeValue().equals(uri)) {
                    return name.substring("xmlns:".length());
                }
            }
            e = e.getParentNode();
        }
        return null;
    }
}