/*
    * 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.maven.settings.io;
  
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.io.OutputStreamWriter;
  import java.io.Writer;
  import java.util.Map;
  import java.util.Objects;
  
  import org.apache.maven.settings.Settings;
  import org.apache.maven.settings.v4.SettingsXpp3Writer;
  import org.codehaus.plexus.util.WriterFactory;
  
  /**
   * Handles serialization of settings into the default textual format.
   *
   * @author Benjamin Bentmann
   */
  @Named
  @Singleton
  public class DefaultSettingsWriter implements SettingsWriter {
  
      @Override
      public void write(File output, Map<String, Object> options, Settings settings) throws IOException {
          Objects.requireNonNull(output, "output cannot be null");
          Objects.requireNonNull(settings, "settings cannot be null");
  
          output.getParentFile().mkdirs();
  
          write(WriterFactory.newXmlWriter(output), options, settings);
      }
  
      @Override
      public void write(Writer output, Map<String, Object> options, Settings settings) throws IOException {
          Objects.requireNonNull(output, "output cannot be null");
          Objects.requireNonNull(settings, "settings cannot be null");
  
          try (Writer out = output) {
              new SettingsXpp3Writer().write(out, settings.getDelegate());
          }
      }
  
      @Override
      public void write(OutputStream output, Map<String, Object> options, Settings settings) throws IOException {
          Objects.requireNonNull(output, "output cannot be null");
          Objects.requireNonNull(settings, "settings cannot be null");
  
          String encoding = settings.getModelEncoding();
          // TODO Use StringUtils here
          if (encoding == null || encoding.length() <= 0) {
              encoding = "UTF-8";
          }
  
          try (Writer out = new OutputStreamWriter(output, encoding)) {
              write(out, options, settings);
          }
      }
  }