Java XML Element Namespace buildNamespacePrefixMap(final Element root)

Description

Build Map of namespace URIs to prefixes.

License

Apache License

Parameter

Parameter	Description
root	Element to get namespaces and prefixes from.

Return

of namespace URIs to prefixes.

Declaration

private static final Map<String, String> buildNamespacePrefixMap(final Element root) 

Method Source Code

//package com.java2s;
/*//from  w w  w . java2s  .c o m
 * 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 java.util.HashMap;

import java.util.Map;

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

public class Main {
    /**
     * Build {@link Map} of namespace URIs to prefixes.
     * 
     * @param root
     *          {@link Element} to get namespaces and prefixes from.
     * @return {@link Map} of namespace URIs to prefixes.
     * @since GemFire 8.1
     */
    private static final Map<String, String> buildNamespacePrefixMap(final Element root) {
        final HashMap<String, String> namespacePrefixMap = new HashMap<>();

        //Look for all of the attributes of cache that start with
        //xmlns
        NamedNodeMap attributes = root.getAttributes();
        for (int i = 0; i < attributes.getLength(); i++) {
            Node item = attributes.item(i);
            if (item.getNodeName().startsWith("xmlns")) {
                //Anything after the colon is the prefix
                //eg xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                //has a prefix of xsi
                String[] splitName = item.getNodeName().split(":");
                String prefix;
                if (splitName.length > 1) {
                    prefix = splitName[1];
                } else {
                    prefix = "";
                }
                String uri = item.getTextContent();
                namespacePrefixMap.put(uri, prefix);
            }
        }

        return namespacePrefixMap;
    }
}

Related

1. addNamespaceDeclaration(Element element, String namespacePrefix, String namespaceURI)
2. addNamespacePrefix(Element element, String namespaceUri, String prefix)
3. buildNamespacePrefixMap(final Element root)
4. byteArrayToElement(byte[] b, boolean namespaceAware)
5. createElement(final String namespace, final String localPart, final String value)
6. createElement(String namespaceURI, String name)
7. createElement(String namespaceURI, String name)