/*
    * 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.plugins.shade.pom;
  
  import java.io.IOException;
  import java.io.Writer;
  
  import org.apache.maven.model.Model;
  import org.jdom2.Document;
  import org.jdom2.Element;
  import org.jdom2.Namespace;
  import org.jdom2.output.Format;
  
  /**
   * @author Jason van Zyl
   */
  public class PomWriter {
      public static void write(Writer w, Model newModel) throws IOException {
          write(w, newModel, false);
      }
  
      public static void write(Writer w, Model newModel, boolean namespaceDeclaration) throws IOException {
          Element root = new Element("project");
  
          if (namespaceDeclaration) {
              String modelVersion = newModel.getModelVersion();
  
              Namespace pomNamespace = Namespace.getNamespace("", "http://maven.apache.org/POM/" + modelVersion);
  
              root.setNamespace(pomNamespace);
  
              Namespace xsiNamespace = Namespace.getNamespace("xsi", "http://www.w3.org/2001/XMLSchema-instance");
  
              root.addNamespaceDeclaration(xsiNamespace);
  
              if (root.getAttribute("schemaLocation", xsiNamespace) == null) {
                  root.setAttribute(
                          "schemaLocation",
                          "http://maven.apache.org/POM/" + modelVersion + " http://maven.apache.org/maven-v"
                                  + modelVersion.replace('.', '_') + ".xsd",
                          xsiNamespace);
              }
          }
  
          Document doc = new Document(root);
  
          MavenJDOMWriter writer = new MavenJDOMWriter();
  
          String encoding = newModel.getModelEncoding() != null ? newModel.getModelEncoding() : "UTF-8";
  
          Format format = Format.getPrettyFormat().setEncoding(encoding);
  
          writer.write(newModel, doc, w, format);
      }
  }