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!
   */
  /*
   * Copyright 1999-2004 The Apache Software Foundation.
   *
   * 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.
   */
  /*
   * $Id: PrefixResolverDefault.java,v 1.2.4.1 2005/09/15 08:15:51 suresh_emailid Exp $
   */
  package jaxp.sun.org.apache.xml.internal.utils;
  
  import org.w3c.dom.NamedNodeMap;
  import org.w3c.dom.Node;
  
  /**
   * This class implements a generic PrefixResolver that
   * can be used to perform prefix-to-namespace lookup
   * for the XPath object.
   * @xsl.usage general
   */
  public class PrefixResolverDefault implements PrefixResolver
  {
  
    /**
     * The context to resolve the prefix from, if the context
     * is not given.
     */
    Node m_context;
  
    /**
     * Construct a PrefixResolverDefault object.
     * @param xpathExpressionContext The context from
     * which XPath expression prefixes will be resolved.
     * Warning: This will not work correctly if xpathExpressionContext
     * is an attribute node.
     */
    public PrefixResolverDefault(Node xpathExpressionContext)
    {
      m_context = xpathExpressionContext;
    }
  
    /**
     * Given a namespace, get the corrisponding prefix.  This assumes that
     * the PrevixResolver hold's it's own namespace context, or is a namespace
     * context itself.
     * @param prefix Prefix to resolve.
     * @return Namespace that prefix resolves to, or null if prefix
     * is not bound.
     */
    public String getNamespaceForPrefix(String prefix)
    {
      return getNamespaceForPrefix(prefix, m_context);
    }
  
    /**
     * Given a namespace, get the corrisponding prefix.
     * Warning: This will not work correctly if namespaceContext
     * is an attribute node.
     * @param prefix Prefix to resolve.
     * @param namespaceContext Node from which to start searching for a
     * xmlns attribute that binds a prefix to a namespace.
     * @return Namespace that prefix resolves to, or null if prefix
     * is not bound.
     */
    public String getNamespaceForPrefix(String prefix,
                                        org.w3c.dom.Node namespaceContext)
    {
  
      Node parent = namespaceContext;
      String namespace = null;
  
      if (prefix.equals("xml"))
      {
        namespace = Constants.S_XMLNAMESPACEURI;
      }
      else
      {
        int type;
  
        while ((null != parent) && (null == namespace)
               && (((type = parent.getNodeType()) == Node.ELEMENT_NODE)
                   || (type == Node.ENTITY_REFERENCE_NODE)))
        {
          if (type == Node.ELEMENT_NODE)
          {
                  if (parent.getNodeName().indexOf(prefix+":") == 0)
                          return parent.getNamespaceURI();
            NamedNodeMap nnm = parent.getAttributes();
  
            for (int i = 0; i < nnm.getLength(); i++)
            {
              Node attr = nnm.item(i);
              String aname = attr.getNodeName();
              boolean isPrefix = aname.startsWith("xmlns:");
  
              if (isPrefix || aname.equals("xmlns"))
              {
                int index = aname.indexOf(':');
                String p = isPrefix ? aname.substring(index + 1) : "";
  
                if (p.equals(prefix))
                {
                  namespace = attr.getNodeValue();
  
                  break;
                }
              }
            }
          }
  
          parent = parent.getParentNode();
        }
      }
  
      return namespace;
    }
  
    /**
     * Return the base identifier.
     *
     * @return null
     */
    public String getBaseIdentifier()
    {
      return null;
    }
          /**
           * @see PrefixResolver#handlesNullPrefixes()
           */
          public boolean handlesNullPrefixes() {
                  return false;
          }
  
  }
  