content: /**
   * Copyright 2014 55 Minutes (http://www.55minutes.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.
   */
  package fiftyfive.wicket.test;
  
  import javax.xml.parsers.DocumentBuilder;
  import javax.xml.parsers.DocumentBuilderFactory;
  import javax.xml.parsers.ParserConfigurationException;
  
  import fiftyfive.wicket.test.dtd.XHtmlEntityResolver;
  
  /**
   * Utility for parsing XHTML documents and verifying that they are valid
   * according to the DTD.
   * You should not have to use this class directly; it will be auto-selected
   * by helper methods in {@link WicketTestUtils}.
   */
  public class XHtmlValidator extends AbstractDocumentValidator
  {
      /**
       * Constructs and returns a standard Java XML DocumentBuilder with
       * validation enabled. Uses
       * {@link XHtmlEntityResolver XHtmlEntityResolver} to resolve DTDs
       * locally for best performance.
       */
      protected DocumentBuilder builder()
      {
          DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
          factory.setValidating(true);
          try
          {
              DocumentBuilder builder = factory.newDocumentBuilder();
              builder.setErrorHandler(this);
              builder.setEntityResolver(new XHtmlEntityResolver());
              return builder;
          }
          catch(ParserConfigurationException pce)
          {
              throw new RuntimeException(pce);
          }
      }
  }
  