/*
    *   Copyright (C) Christian Schulte, 2005-206
    *   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: CommitClassesTask.java 4613 2012-09-22 10:07:08Z schulte $
   *
   */
  package org.jomc.ant;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.logging.Level;
  import javax.xml.bind.JAXBContext;
  import javax.xml.bind.JAXBException;
  import javax.xml.bind.util.JAXBSource;
  import javax.xml.transform.Source;
  import javax.xml.transform.Transformer;
  import javax.xml.transform.TransformerConfigurationException;
  import org.apache.tools.ant.BuildException;
  import org.jomc.ant.types.TransformerResourceType;
  import org.jomc.model.Implementation;
  import org.jomc.model.Module;
  import org.jomc.model.Specification;
  import org.jomc.modlet.Model;
  import org.jomc.modlet.ModelContext;
  import org.jomc.modlet.ModelException;
  import org.jomc.modlet.ModelValidationReport;
  import org.jomc.modlet.ObjectFactory;
  import org.jomc.tools.ClassFileProcessor;
  
  /**
   * Task for committing model objects to class files.
   *
   * @author <a href="mailto:cs@schulte.it">Christian Schulte</a>
   * @version $JOMC: CommitClassesTask.java 4613 2012-09-22 10:07:08Z schulte $
   */
  public final class CommitClassesTask extends ClassFileProcessorTask
  {
  
      /** The directory holding the class files to commit model objects to. */
      private File classesDirectory;
  
      /** XSLT documents to use for transforming model objects. */
      private List<TransformerResourceType> modelObjectStylesheetResources;
  
      /** Creates a new {@code CommitClassesTask} instance. */
      public CommitClassesTask()
      {
          super();
      }
  
      /**
       * Gets the directory holding the class files to commit model objects to.
       *
       * @return The directory holding the class files to commit model objects to or {@code null}.
       *
       * @see #setClassesDirectory(java.io.File)
       */
      public File getClassesDirectory()
      {
          return this.classesDirectory;
      }
  
      /**
       * Sets the directory holding the class files to commit model objects to.
       *
       * @param value The new directory holding the class files to commit model objects to or {@code null}.
       *
       * @see #getClassesDirectory()
       */
      public void setClassesDirectory( final File value )
      {
          this.classesDirectory = value;
     }
 
     /**
      * Gets the XSLT documents to use for transforming model objects.
      * <p>This accessor method returns a reference to the live list, not a snapshot. Therefore any modification you make
      * to the returned list will be present inside the object. This is why there is no {@code set} method for the
      * model object stylesheet resources property.</p>
      *
      * @return The XSLT documents to use for transforming model objects.
      *
      * @see #createModelObjectStylesheetResource()
      */
     public List<TransformerResourceType> getModelObjectStylesheetResources()
     {
         if ( this.modelObjectStylesheetResources == null )
         {
             this.modelObjectStylesheetResources = new LinkedList<TransformerResourceType>();
         }
 
         return this.modelObjectStylesheetResources;
     }
 
     /**
      * Creates a new {@code modelObjectStylesheetResource} element instance.
      *
      * @return A new {@code modelObjectStylesheetResource} element instance.
      *
      * @see #getModelObjectStylesheetResources()
      */
     public TransformerResourceType createModelObjectStylesheetResource()
     {
         final TransformerResourceType modelObjectStylesheetResource = new TransformerResourceType();
         this.getModelObjectStylesheetResources().add( modelObjectStylesheetResource );
         return modelObjectStylesheetResource;
     }
 
     /** {@inheritDoc} */
     @Override
     public void preExecuteTask() throws BuildException
     {
         super.preExecuteTask();
 
         this.assertNotNull( "classesDirectory", this.getClassesDirectory() );
         this.assertLocationsNotNull( this.getModelObjectStylesheetResources() );
     }
 
     /**
      * Commits model objects to class files.
      *
      * @throws BuildException if committing model objects fails.
      */
     @Override
     public void processClassFiles() throws BuildException
     {
         ProjectClassLoader classLoader = null;
         boolean suppressExceptionOnClose = true;
 
         try
         {
             this.log( Messages.getMessage( "committingModelObjects", this.getModel() ) );
 
             classLoader = this.newProjectClassLoader();
             final ModelContext context = this.newModelContext( classLoader );
             final ClassFileProcessor tool = this.newClassFileProcessor();
             final JAXBContext jaxbContext = context.createContext( this.getModel() );
             final Model model = this.getModel( context );
             final Source source = new JAXBSource( jaxbContext, new ObjectFactory().createModel( model ) );
             final ModelValidationReport validationReport = context.validateModel( this.getModel(), source );
 
             this.logValidationReport( context, validationReport );
             tool.setModel( model );
 
             final List<Transformer> transformers =
                 new ArrayList<Transformer>( this.getModelObjectStylesheetResources().size() );
 
             for ( int i = 0, s0 = this.getModelObjectStylesheetResources().size(); i < s0; i++ )
             {
                 final Transformer transformer =
                     this.getTransformer( this.getModelObjectStylesheetResources().get( i ) );
 
                 if ( transformer != null )
                 {
                     transformers.add( transformer );
                 }
             }
 
             if ( validationReport.isModelValid() )
             {
                 final Specification s = this.getSpecification( model );
                 final Implementation i = this.getImplementation( model );
                 final Module m = this.getModule( model );
 
                 if ( s != null )
                 {
                     tool.commitModelObjects( s, context, this.getClassesDirectory() );
 
                     if ( !transformers.isEmpty() )
                     {
                         tool.transformModelObjects( s, context, this.getClassesDirectory(), transformers );
                     }
                 }
 
 
                 if ( i != null )
                 {
                     tool.commitModelObjects( i, context, this.getClassesDirectory() );
 
                     if ( !transformers.isEmpty() )
                     {
                         tool.transformModelObjects( i, context, this.getClassesDirectory(), transformers );
                     }
                 }
 
                 if ( m != null )
                 {
                     tool.commitModelObjects( m, context, this.getClassesDirectory() );
 
                     if ( !transformers.isEmpty() )
                     {
                         tool.transformModelObjects( m, context, this.getClassesDirectory(), transformers );
                     }
                 }
 
                 if ( this.isModulesProcessingRequested() )
                 {
                     tool.commitModelObjects( context, this.getClassesDirectory() );
 
                     if ( !transformers.isEmpty() )
                     {
                         tool.transformModelObjects( context, this.getClassesDirectory(), transformers );
                     }
                 }
 
                 suppressExceptionOnClose = false;
             }
             else
             {
                 throw new ModelException( Messages.getMessage( "invalidModel", this.getModel() ) );
             }
         }
         catch ( final IOException e )
         {
             throw new ClassProcessingException( Messages.getMessage( e ), e, this.getLocation() );
         }
         catch ( final JAXBException e )
         {
             throw new ClassProcessingException( Messages.getMessage( e ), e, this.getLocation() );
         }
         catch ( final TransformerConfigurationException e )
         {
             throw new ClassProcessingException( Messages.getMessage( e ), e, this.getLocation() );
         }
         catch ( final ModelException e )
         {
             throw new ClassProcessingException( Messages.getMessage( e ), e, this.getLocation() );
         }
         finally
         {
             try
             {
                 if ( classLoader != null )
                 {
                     classLoader.close();
                 }
             }
             catch ( final IOException e )
             {
                 if ( suppressExceptionOnClose )
                 {
                     this.logMessage( Level.SEVERE, Messages.getMessage( e ), e );
                 }
                 else
                 {
                     throw new ClassProcessingException( Messages.getMessage( e ), e, this.getLocation() );
                 }
             }
         }
     }
 
     /** {@inheritDoc} */
     @Override
     public CommitClassesTask clone()
     {
         final CommitClassesTask clone = (CommitClassesTask) super.clone();
         clone.classesDirectory =
             this.classesDirectory != null ? new File( this.classesDirectory.getAbsolutePath() ) : null;
 
         if ( this.modelObjectStylesheetResources != null )
         {
             clone.modelObjectStylesheetResources =
                 new ArrayList<TransformerResourceType>( this.modelObjectStylesheetResources.size() );
 
             for ( TransformerResourceType e : this.modelObjectStylesheetResources )
             {
                 clone.modelObjectStylesheetResources.add( e.clone() );
             }
         }
 
         return clone;
     }
 
 }