Java XML Node Namespace hasNamespaceURI(@Nullable final Node aNode, @Nullable final String sNamespaceURI)

Description

has Namespace URI

License

Apache License

Declaration

public static boolean hasNamespaceURI(@Nullable final Node aNode, @Nullable final String sNamespaceURI) 

Method Source Code

//package com.java2s;
/**//w w w .  j av a  2  s.c  om
 * Copyright (C) 2014-2017 Philip Helger (www.helger.com)
 * philip[at]helger[dot]com
 *
 * Licensed 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.annotation.Nullable;

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

import org.w3c.dom.Node;

public class Main {
    public static boolean hasNamespaceURI(@Nullable final Node aNode, @Nullable final String sNamespaceURI) {
        final String sNSURI = aNode == null ? null : aNode.getNamespaceURI();
        return sNSURI != null && sNSURI.equals(sNamespaceURI);
    }

    @Nullable
    public static String getNamespaceURI(@Nullable final Node aNode) {
        if (aNode instanceof Document) {
            // Recurse into document element
            return getNamespaceURI(((Document) aNode).getDocumentElement());
        }
        if (aNode != null)
            return aNode.getNamespaceURI();
        return null;
    }

    @Nullable
    public static Element getDocumentElement(@Nullable final Node aNode) {
        final Document aDoc = getOwnerDocument(aNode);
        return aDoc == null ? null : aDoc.getDocumentElement();
    }

    /**
     * Get the owner document of the passed node. If the node itself is a
     * document, only a cast is performed.
     *
     * @param aNode
     *        The node to get the document from. May be <code>null</code>.
     * @return <code>null</code> if the passed node was <code>null</code>.
     */
    @Nullable
    public static Document getOwnerDocument(@Nullable final Node aNode) {
        return aNode == null ? null : aNode instanceof Document ? (Document) aNode : aNode.getOwnerDocument();
    }
}

Related

1. getNodeName(Node node, NamespaceContext namespaceContext)
2. getNodeString(Node node, NamespaceContext context)
3. hasDITANamespace(Node node)
4. hasNamespace(Node node, String prefix, String namespace)
5. hasNamespaceURI(@Nullable final Node aNode, @Nullable final String sNamespaceURI)
6. isAppropriateElement(Node iNode, String iNodeName, String iNamespace)
7. isAppropriateElement(Node iNode, String iNodeName, String iNamespace)
8. isInNamespace(Node node, String namespace)
9. isInNamespace(Node node, String namespace)