NameTest.java

/* NameTest.java --
   Copyright (C) 2004,2006 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath 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 2, or (at your option)
any later version.

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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.

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along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
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package gnu.xml.xpath;

import javax.xml.XMLConstants;
import javax.xml.namespace.QName;
import org.w3c.dom.Node;

/**
 * Tests whether a node has the specified name.
 *
 * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
 */
public final class NameTest
  extends Test
{

  final QName qName;
  final boolean anyLocalName;
  final boolean any;

  public NameTest(QName qName, boolean anyLocalName, boolean any)
  {
    this.anyLocalName = anyLocalName;
    this.any = any;
    this.qName = qName;
  }

  public boolean matchesAny()
  {
    return any;
  }

  public boolean matchesAnyLocalName()
  {
    return anyLocalName;
  }

  public boolean matches(Node node, int pos, int len)
  {
    switch (node.getNodeType())
      {
      case Node.ATTRIBUTE_NODE:
        // Do not match namespace attributes
        String uri = node.getNamespaceURI();
        if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(uri) ||
            XMLConstants.XMLNS_ATTRIBUTE.equals(node.getPrefix()) ||
            XMLConstants.XMLNS_ATTRIBUTE.equals(node.getNodeName()))
          {
            return false;
          }
        // Fall through
      case Node.ELEMENT_NODE:
        break;
      default:
        return false;
      }
    if (any)
      return true;
    String uri = qName.getNamespaceURI();
    String nodeUri = node.getNamespaceURI();
    if (!equal(uri, nodeUri))
      return false;
    if (anyLocalName)
      return true;
    String localName = qName.getLocalPart();
    String nodeLocalName = getLocalName(node);
    return (localName.equals(nodeLocalName));
  }

  static String getLocalName(Node node)
  {
    String localName = node.getLocalName();
    if (localName == null)
      {
        localName = node.getNodeName();
        int ci = localName.indexOf(':');
        if (ci != -1)
          localName = localName.substring(ci + 1);
      }
    return localName;
  }

  static boolean equal(String s1, String s2)
  {
    return (((s1 == null || s1.length() == 0) &&
             (s2 == null || s2.length() == 0)) ||
            s1 != null && s1.equals(s2));
  }

  public Test clone(Object context)
  {
    return new NameTest(qName, anyLocalName, any);
  }

  public boolean references(QName var)
  {
    return false;
  }

  public String toString ()
  {
    if (any)
      return "*";
    return qName.toString();
  }

}