package org.apache.maven.plugin.failsafe.xmlsummary;
   
   /*
    * 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.
   */
  
  import javax.xml.bind.JAXBContext;
  import javax.xml.bind.JAXBElement;
  import javax.xml.bind.JAXBException;
  import javax.xml.bind.Marshaller;
  import javax.xml.bind.PropertyException;
  import javax.xml.bind.Unmarshaller;
  import javax.xml.bind.annotation.XmlRootElement;
  import javax.xml.bind.helpers.DefaultValidationEventHandler;
  import javax.xml.namespace.QName;
  import javax.xml.transform.stream.StreamSource;
  import java.io.File;
  import java.io.IOException;
  import java.io.StringWriter;
  import java.io.Writer;
  import java.nio.charset.Charset;
  import java.util.Collections;
  import java.util.Map;
  import java.util.Map.Entry;
  
  import static javax.xml.bind.JAXBContext.newInstance;
  import static javax.xml.bind.Marshaller.JAXB_ENCODING;
  import static javax.xml.bind.Marshaller.JAXB_FORMATTED_OUTPUT;
  import static javax.xml.bind.Marshaller.JAXB_FRAGMENT;
  
  /**
   * @author <a href="mailto:tibordigana@apache.org">Tibor Digana (tibor17)</a>
   * @since 2.20
   */
  public final class JAXB
  {
      private JAXB()
      {
          throw new IllegalStateException( "Not instantiated constructor." );
      }
  
      public static <T> T unmarshal( File source, Class<T> rootXmlNode ) throws JAXBException
      {
          return unmarshal( source, rootXmlNode, Collections.<String, Object>emptyMap() );
      }
  
      public static <T> T unmarshal( File source, Class<T> rootXmlNode, Map<String, ?> props )
              throws JAXBException
      {
          Class<?>[] classesToBeBound = { rootXmlNode };
          JAXBContext ctx = newInstance( classesToBeBound );
          Unmarshaller unmarshaller = ctx.createUnmarshaller();
          properties( props, unmarshaller );
          unmarshaller.setEventHandler( new DefaultValidationEventHandler() );
          JAXBElement<T> element = unmarshaller.unmarshal( new StreamSource( source ), rootXmlNode );
          return element.getValue();
      }
  
      public static <T> String marshal( T bean, Charset encoding ) throws JAXBException, IOException
      {
          return marshal( bean, Collections.<String, Object>emptyMap(), encoding ).toString();
      }
  
      @SuppressWarnings( "unchecked" )
      public static <T> StringWriter marshal( T bean, Map<String, Object> props, Charset encoding )
              throws JAXBException, IOException
      {
          return marshal( bean, (Class<T>) bean.getClass(), props, encoding );
      }
  
      public static <T> StringWriter marshal( T bean, Class<T> type, Map<String, Object> props, Charset encoding )
              throws JAXBException, IOException
      {
          JAXBElement<T> rootElement = buildJaxbElement( bean, type );
          return marshal( rootElement, type, props, encoding );
      }
  
      public static <T> StringWriter marshal( JAXBElement<T> rootElement, Class<T> type,
                                              Map<String, Object> props, Charset encoding )
              throws JAXBException, IOException
      {
          StringWriter destination = new StringWriter( 256 );
          marshal( rootElement, type, props, destination, encoding );
          destination.flush();
         return destination;
     }
 
     public static <T> void marshal( JAXBElement<T> rootElement, Class<T> type, Map<String, Object> props,
                                     Writer destination, Charset encoding ) throws JAXBException
     {
         Class<?>[] classesToBeBound = { type };
         JAXBContext context = newInstance( classesToBeBound );
         Marshaller marshaller = context.createMarshaller();
         marshaller.setProperty( JAXB_ENCODING, encoding.name() );
         marshaller.setProperty( JAXB_FORMATTED_OUTPUT, true );
         marshaller.setProperty( JAXB_FRAGMENT, true );
         properties( props, marshaller );
         marshaller.marshal( rootElement, destination );
     }
 
     private static <T> JAXBElement<T> buildJaxbElement( T bean, Class<T> type )
     {
         XmlRootElement xmlRootElement = type.getAnnotation( XmlRootElement.class );
         if ( xmlRootElement == null )
         {
             return null;
         }
         QName root = new QName( "", xmlRootElement.name() );
         return new JAXBElement<T>( root, type, bean );
     }
 
     private static void properties( Map<String, ?> props, Unmarshaller unmarshaller ) throws PropertyException
     {
         for ( Entry<String, ?> e : props.entrySet() )
         {
             unmarshaller.setProperty( e.getKey(), e.getValue() );
         }
     }
 
     private static void properties( Map<String, ?> props, Marshaller marshaller ) throws PropertyException
     {
         for ( Entry<String, ?> e : props.entrySet() )
         {
             marshaller.setProperty( e.getKey(), e.getValue() );
         }
     }
 }