package org.apache.maven.internal.impl;
   
   /*
    * 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.inject.Named;
  import javax.inject.Singleton;
  
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.io.Reader;
  import java.io.Writer;
  import java.util.Objects;
  
  import org.apache.maven.api.annotations.Nonnull;
  import org.apache.maven.api.services.xml.SettingsXmlFactory;
  import org.apache.maven.api.services.xml.XmlReaderException;
  import org.apache.maven.api.services.xml.XmlReaderRequest;
  import org.apache.maven.api.services.xml.XmlWriterException;
  import org.apache.maven.api.services.xml.XmlWriterRequest;
  import org.apache.maven.api.model.InputSource;
  import org.apache.maven.api.settings.Settings;
  import org.apache.maven.settings.v4.SettingsXpp3Reader;
  import org.apache.maven.settings.v4.SettingsXpp3Writer;
  
  @Named
  @Singleton
  public class DefaultSettingsXmlFactory
          implements SettingsXmlFactory
  {
      @Override
      public Settings read( @Nonnull XmlReaderRequest request ) throws XmlReaderException
      {
          Objects.requireNonNull( request, "request can not be null" );
          Reader reader = request.getReader();
          InputStream inputStream = request.getInputStream();
          if ( reader == null && inputStream == null )
          {
              throw new IllegalArgumentException( "reader or inputStream must be non null" );
          }
          try
          {
              InputSource source = null;
              if ( request.getModelId() != null || request.getLocation() != null )
              {
                  source = new InputSource( request.getModelId(), request.getLocation() );
              }
              SettingsXpp3Reader xml = new SettingsXpp3Reader();
              xml.setAddDefaultEntities( request.isAddDefaultEntities() );
              if ( reader != null )
              {
                  return xml.read( reader, request.isStrict() );
              }
              else
              {
                  return xml.read( inputStream, request.isStrict() );
              }
          }
          catch ( Exception e )
          {
              throw new XmlReaderException( "Unable to read settings", e );
          }
      }
  
      @Override
      public void write( XmlWriterRequest<Settings> request ) throws XmlWriterException
      {
          Objects.requireNonNull( request, "request can not be null" );
          Settings content = Objects.requireNonNull( request.getContent(), "content can not be null" );
          OutputStream outputStream = request.getOutputStream();
          Writer writer = request.getWriter();
          if ( writer == null && outputStream == null )
          {
              throw new IllegalArgumentException( "writer or outputStream must be non null" );
          }
          try
          {
              if ( writer != null )
              {
                  new SettingsXpp3Writer().write( writer, content );
              }
              else
              {
                 new SettingsXpp3Writer().write( outputStream, content );
             }
         }
         catch ( Exception e )
         {
             throw new XmlWriterException( "Unable to write settings", e );
         }
     }
 }