content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you 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 org.apache.causeway.applib.services.xml;
  
  import org.w3c.dom.Document;
  import org.w3c.dom.Element;
  
  /**
   * This service provides a number of utility services for interacting with
   * w3c DOM (XML) {@link Document}s
   *
   * @since 1.x {@index}
   */
  public interface XmlService {
  
      /**
       * Converts xml string into an {@link Document W3C Document}.
       *
       * @see #asString(Document)
       */
      Document asDocument(String xmlStr);
  
      /**
       * Serializes a {@link Document W3C Document} back into a string.
       *
       * @see #asDocument(String)
       */
      public String asString(final Document doc);
  
      /**
       * Convenience method to walk XML document.
       */
      Element getChildElement(
                      final Element el, final String tagname);
  
      /**
       * Convenience method to obtain value of child text node.
       */
      String getChildTextValue(final Element el);
  
  }
  