package org.apache.maven.plugin.compiler.module;
   
   /*
    * 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.
   */
  
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Set;
  
  /**
   * Simple representation of a Module containing info required by this plugin.
   * It will provide only methods matching Java 9 ModuleDescriptor, so once Java 9  is required, we can easily switch 
   * 
   * @author Robert Scholte
   * @since 3.7.0
   *
   */
  public class JavaModuleDescriptor
  {
      private String name;
      
      private boolean automatic;
  
      private Set<JavaRequires> requires = new HashSet<JavaRequires>();
      
      private Set<JavaExports> exports = new HashSet<JavaExports>();
  
      public String name()
      {
          return name;
      }
  
      public boolean isAutomatic()
      {
          return automatic;
      }
      
      public Set<JavaRequires> requires()
      {
          return Collections.unmodifiableSet( requires );
      }
      
      public Set<JavaExports> exports()
      {
          return Collections.unmodifiableSet( exports );
      }
      
      public static JavaModuleDescriptor.Builder newModule( String name )
      {
          return new Builder( name ).setAutomatic( false );
      }
      
      public static Builder newAutomaticModule( String name )
      {
          return new Builder( name ).setAutomatic( true );
      }  
  
      /**
       * A JavaModuleDescriptor Builder
       * 
       * @author Robert Scholte
       * @since 3.7.0
       */
      public static final class Builder
      {
          private JavaModuleDescriptor jModule;
          
          private Builder( String name )
          {
              jModule = new JavaModuleDescriptor();
              jModule.name = name;
          }
          
          private Builder setAutomatic( boolean isAutomatic )
          {
              jModule.automatic = isAutomatic;
              return this;
          }
  
          public Builder requires( String name )
          {
              JavaRequires requires = new JavaRequires( name );
              jModule.requires.add( requires );
             return this;
         }
         
         public Builder exports( String source )
         {
             JavaExports exports = new JavaExports( source );
             jModule.exports.add( exports );
             return this;
         }
         
         public JavaModuleDescriptor build()
         {
             return jModule;
         }
     }
     
     /**
      * Represents Module.Requires
      * 
      * @author Robert Scholte
      * @since 3.7.0
      */
     public static class JavaRequires
     {
         private final String name;
 
         private JavaRequires( String name )
         {
             this.name = name;
         }
 
         public String name()
         {
             return name;
         }
     }
     
     /**
      * Represents Module.Exports
      * 
      * @author Robert Scholte
      * @since 3.7.0
      *
      */
     public static class JavaExports
     {
         private final String source;
         
         private JavaExports( String source )
         {
             this.source = source;
         }
         
         public String source()
         {
             return source;
         }
     }
     
 }