/*
 * Copyright (c) 2002 World Wide Web Consortium,
 * (Massachusetts Institute of Technology, Institut National de
 * Recherche en Informatique et en Automatique, Keio University). All
 * Rights Reserved. This program is distributed under the W3C's Software
 * Intellectual Property License. This program 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 W3C License http://www.w3.org/Consortium/Legal/ for more details.
 */

package org.w3c.domts;

import org.w3c.dom.DOMException;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;

/**
 *   JTidy does not implement DOMImplementation
 *    we do it here to keep the test exclusion logic
 *    from falling apart.
 */
public class JTidyDOMImplementation
    implements DOMImplementation {

  /**
   * Test if the DOM implementation implements a specific feature.
   * @param feature The name of the feature to test (case-insensitive). The
   *   values used by DOM features are defined throughout the DOM Level 2
   *   specifications and listed in the  section. The name must be an XML
   *   name. To avoid possible conflicts, as a convention, names referring
   *   to features defined outside the DOM specification should be made
   *   unique.
   * @param version This is the version number of the feature to test. In
   *   Level 2, the string can be either "2.0" or "1.0". If the version is
   *   not specified, supporting any version of the feature causes the
   *   method to return <code>true</code>.
   * @return <code>true</code> if the feature is implemented in the
   *   specified version, <code>false</code> otherwise.
   */
  public boolean hasFeature(String feature,
                            String version) {
    if (feature.equals("Core")) {
      return version == null || version.equals("1.0") || version.equals("2.0");
    }
    return false;
  }

  /**
   * Creates an empty <code>DocumentType</code> node. Entity declarations
   * and notations are not made available. Entity reference expansions and
   * default attribute additions do not occur. It is expected that a
   * future version of the DOM will provide a way for populating a
   * <code>DocumentType</code>.
   * @param qualifiedName The qualified name of the document type to be
   *   created.
   * @param publicId The external subset public identifier.
   * @param systemId The external subset system identifier.
   * @return A new <code>DocumentType</code> node with
   *   <code>Node.ownerDocument</code> set to <code>null</code>.
   * @exception DOMException
   *   INVALID_CHARACTER_ERR: Raised if the specified qualified name
   *   contains an illegal character.
   *   <br>NAMESPACE_ERR: Raised if the <code>qualifiedName</code> is
   *   malformed.
   *   <br>NOT_SUPPORTED_ERR: May be raised by DOM implementations which do
   *   not support the <code>"XML"</code> feature, if they choose not to
   *   support this method. Other features introduced in the future, by
   *   the DOM WG or in extensions defined by other groups, may also
   *   demand support for this method; please consult the definition of
   *   the feature to see if it requires this method.
   * @since DOM Level 2
   */
  public DocumentType createDocumentType(String qualifiedName,
                                         String publicId,
                                         String systemId) throws DOMException {
    throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Not Implemented");
  }

  /**
   * Creates a DOM Document object of the specified type with its document
   * element.
   * @param namespaceURI The namespace URI of the document element to
   *   create.
   * @param qualifiedName The qualified name of the document element to be
   *   created.
   * @param doctype The type of document to be created or <code>null</code>.
   *   When <code>doctype</code> is not <code>null</code>, its
   *   <code>Node.ownerDocument</code> attribute is set to the document
   *   being created.
   * @return A new <code>Document</code> object.
   * @exception DOMException
   *   INVALID_CHARACTER_ERR: Raised if the specified qualified name
   *   contains an illegal character.
   *   <br>NAMESPACE_ERR: Raised if the <code>qualifiedName</code> is
   *   malformed, if the <code>qualifiedName</code> has a prefix and the
   *   <code>namespaceURI</code> is <code>null</code>, or if the
   *   <code>qualifiedName</code> has a prefix that is "xml" and the
   *   <code>namespaceURI</code> is different from "
   *   http://www.w3.org/XML/1998/namespace" , or if the DOM
   *   implementation does not support the <code>"XML"</code> feature but
   *   a non-null namespace URI was provided, since namespaces were
   *   defined by XML.
   *   <br>WRONG_DOCUMENT_ERR: Raised if <code>doctype</code> has already
   *   been used with a different document or was created from a different
   *   implementation.
   *   <br>NOT_SUPPORTED_ERR: May be raised by DOM implementations which do
   *   not support the "XML" feature, if they choose not to support this
   *   method. Other features introduced in the future, by the DOM WG or
   *   in extensions defined by other groups, may also demand support for
   *   this method; please consult the definition of the feature to see if
   *   it requires this method.
   * @since DOM Level 2
   */
  public Document createDocument(String namespaceURI,
                                 String qualifiedName,
                                 DocumentType doctype) throws DOMException {
    throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Not Implemented");
  }

  public DOMImplementation getInterface(String feature) {
    return this;
  }

  public Object getFeature(String feature, String version) {
    return null;
  }

}