/*
    * 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.internal.impl;
  
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.io.Reader;
  import java.io.Writer;
  
  import org.apache.maven.api.annotations.Nonnull;
  import org.apache.maven.api.di.Named;
  import org.apache.maven.api.di.Singleton;
  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.settings.InputSource;
  import org.apache.maven.api.settings.Settings;
  import org.apache.maven.settings.v4.SettingsStaxReader;
  import org.apache.maven.settings.v4.SettingsStaxWriter;
  
  import static org.apache.maven.internal.impl.StaxLocation.getLocation;
  import static org.apache.maven.internal.impl.StaxLocation.getMessage;
  
  @Named
  @Singleton
  public class DefaultSettingsXmlFactory implements SettingsXmlFactory {
      @Override
      public Settings read(@Nonnull XmlReaderRequest request) throws XmlReaderException {
          nonNull(request, "request");
          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.getLocation());
              }
              SettingsStaxReader xml = new SettingsStaxReader();
              xml.setAddDefaultEntities(request.isAddDefaultEntities());
              if (reader != null) {
                  return xml.read(reader, request.isStrict(), source);
              } else {
                  return xml.read(inputStream, request.isStrict(), source);
              }
          } catch (Exception e) {
              throw new XmlReaderException("Unable to read settings: " + getMessage(e), getLocation(e), e);
          }
      }
  
      @Override
      public void write(XmlWriterRequest<Settings> request) throws XmlWriterException {
          nonNull(request, "request");
          Settings content = nonNull(request.getContent(), "content");
          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 SettingsStaxWriter().write(writer, content);
              } else {
                  new SettingsStaxWriter().write(outputStream, content);
              }
          } catch (Exception e) {
              throw new XmlWriterException("Unable to write settings: " + getMessage(e), getLocation(e), e);
          }
      }
  
      static <T> T nonNull(T t, String name) {
          if (t == null) {
              throw new IllegalArgumentException(name + " cannot be null");
          }
          return t;
      }
  }