content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  // Namespaces.java - Analyze namespace nodes in a DOM tree
  
  /*
   * Copyright 2001-2004 The Apache Software Foundation or its licensors,
   * as applicable.
   *
   * 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.
   */
  
  package jaxp.sun.org.apache.xml.internal.resolver.helpers;
  
  import org.w3c.dom.*;
  
  /**
   * Static Namespace query methods.
   *
   * <p>This class defines a set of static methods that can be called
   * to analyze the namespace properties of DOM nodes.</p>
   *
   * @author Norman Walsh
   * <a href="mailto:Norman.Walsh@Sun.COM">Norman.Walsh@Sun.COM</a>
   *
   */
  public class Namespaces {
      /**
       * Returns the "prefix" part of a QName or the empty string (not
       * null) if the name has no prefix.
       *
       * @param element The QName of an element.
       * @return The prefix part of the element name.
       */
      public static String getPrefix(Element element) {
          String name = element.getTagName();
          String prefix = "";
  
          if (name.indexOf(':') > 0) {
              prefix = name.substring(0, name.indexOf(':'));
          }
  
          return prefix;
      }
  
      /**
       * Returns the "localname" part of a QName, which is the whole
       * name if it has no prefix.
       *
       * @param element The QName of an element.
       * @return The local part of a QName.
       */
      public static String getLocalName(Element element) {
          String name = element.getTagName();
  
          if (name.indexOf(':') > 0) {
              name = name.substring(name.indexOf(':')+1);
          }
  
          return name;
      }
  
      /**
       * Returns the namespace URI for the specified prefix at the
       * specified context node.
       *
       * @param node The context node.
       * @param prefix The prefix.
       * @return The namespace URI associated with the prefix, or
       * null if no namespace declaration exists for the prefix.
       */
      public static String getNamespaceURI(Node node, String prefix) {
          if (node == null || node.getNodeType() != Node.ELEMENT_NODE) {
              return null;
          }
  
          if (prefix.equals("")) {
              if (((Element) node).hasAttribute("xmlns")) {
                  return ((Element) node).getAttribute("xmlns");
              }
          } else {
              String nsattr = "xmlns:" + prefix;
              if (((Element) node).hasAttribute(nsattr)) {
                  return ((Element) node).getAttribute(nsattr);
              }
          }
  
          return getNamespaceURI(node.getParentNode(), prefix);
      }
  
      /**
       * Returns the namespace URI for the namespace to which the
       * element belongs.
       *
       * @param element The element.
       * @return The namespace URI associated with the namespace of the
       * element, or null if no namespace declaration exists for it.
       */
      public static String getNamespaceURI(Element element) {
          String prefix = getPrefix(element);
          return getNamespaceURI(element, prefix);
      }
  }
  