/*
    *   Copyright (C) 2005 Christian Schulte <cs@schulte.it>
    *   All rights reserved.
    *
    *   Redistribution and use in source and binary forms, with or without
    *   modification, are permitted provided that the following conditions
    *   are met:
    *
    *     o Redistributions of source code must retain the above copyright
   *       notice, this list of conditions and the following disclaimer.
   *
   *     o Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in
   *       the documentation and/or other materials provided with the
   *       distribution.
   *
   *   THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
   *   INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
   *   AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
   *   THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY DIRECT, INDIRECT,
   *   INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   *   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   *   THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   *   $JOMC: MainInstanceShowMojo.java 5228 2016-04-24 11:08:06Z schulte $
   *
   */
  package org.jomc.mojo;
  
  import javax.xml.bind.JAXBElement;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.apache.maven.plugins.annotations.ResolutionScope;
  import org.jomc.model.Instance;
  import org.jomc.model.Modules;
  import org.jomc.model.modlet.ModelHelper;
  import org.jomc.modlet.Model;
  import org.jomc.modlet.ModelContext;
  
  /**
   * Displays an instance from the project's main model.
   *
   * @author <a href="mailto:cs@schulte.it">Christian Schulte</a>
   * @version $JOMC: MainInstanceShowMojo.java 5228 2016-04-24 11:08:06Z schulte $
   * @since 1.1
   */
  @Mojo( name = "show-main-instance",
         requiresDependencyResolution = ResolutionScope.TEST,
         threadSafe = true )
  public final class MainInstanceShowMojo extends AbstractModelShowMojo
  {
  
      /**
       * Identifier of the instance to show.
       */
      @Parameter( name = "identifier",
                  property = "jomc.identifier",
                  required = true )
      private String identifier;
  
      /**
       * Execution strategy of the goal ({@code always} or {@code once-per-session}).
       */
      @Parameter( name = "showMainInstanceExecutionStrategy",
                  property = "jomc.showMainInstanceExecutionStrategy",
                  defaultValue = "once-per-session" )
      private String showMainInstanceExecutionStrategy;
  
      /**
       * Creates a new {@code MainInstanceShowMojo} instance.
       */
      public MainInstanceShowMojo()
      {
          super();
      }
  
      @Override
      protected JAXBElement<?> getDisplayModel( final ModelContext modelContext ) throws MojoExecutionException
      {
          final Model model = this.getModel( modelContext );
          final Modules modules = ModelHelper.getModules( model );
          final Instance instance = modules != null ? modules.getInstance( this.identifier ) : null;
          JAXBElement<?> displayModel = null;
  
          if ( instance != null )
          {
              displayModel = new org.jomc.model.ObjectFactory().createInstance( instance );
          }
  
          return displayModel;
      }
  
      @Override
      protected ClassLoader getDisplayClassLoader() throws MojoExecutionException
      {
         return this.getMainClassLoader();
     }
 
     @Override
     protected String getGoal() throws MojoExecutionException
     {
         return "show-main-instance";
     }
 
     @Override
     protected String getExecutionStrategy() throws MojoExecutionException
     {
         return this.showMainInstanceExecutionStrategy;
     }
 
 }