package org.apache.maven.model.profile.activation;
   
   /*
    * 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 javax.inject.Named;
  import javax.inject.Singleton;
  
  import org.apache.maven.model.Activation;
  import org.apache.maven.model.ActivationProperty;
  import org.apache.maven.model.Profile;
  import org.apache.maven.model.building.ModelProblemCollector;
  import org.apache.maven.model.building.ModelProblem.Severity;
  import org.apache.maven.model.building.ModelProblem.Version;
  import org.apache.maven.model.building.ModelProblemCollectorRequest;
  import org.apache.maven.model.profile.ProfileActivationContext;
  import org.codehaus.plexus.util.StringUtils;
  
  /**
   * Determines profile activation based on the existence or value of some execution property.
   *
   * @author Benjamin Bentmann
   * @see ActivationProperty
   */
  @Named( "property" )
  @Singleton
  public class PropertyProfileActivator
      implements ProfileActivator
  {
  
      @Override
      public boolean isActive( Profile profile, ProfileActivationContext context, ModelProblemCollector problems )
      {
          Activation activation = profile.getActivation();
  
          if ( activation == null )
          {
              return false;
          }
  
          ActivationProperty property = activation.getProperty();
  
          if ( property == null )
          {
              return false;
          }
  
          String name = property.getName();
          boolean reverseName = false;
  
          if ( name != null && name.startsWith( "!" ) )
          {
              reverseName = true;
              name = name.substring( 1 );
          }
  
          if ( name == null || name.length() <= 0 )
          {
              problems.add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
                      .setMessage( "The property name is required to activate the profile " + profile.getId() )
                      .setLocation( property.getLocation( "" ) ) );
              return false;
          }
  
          String sysValue = context.getUserProperties().get( name );
          if ( sysValue == null )
          {
              sysValue = context.getSystemProperties().get( name );
          }
  
          String propValue = property.getValue();
          if ( StringUtils.isNotEmpty( propValue ) )
          {
              boolean reverseValue = false;
              if ( propValue.startsWith( "!" ) )
              {
                  reverseValue = true;
                  propValue = propValue.substring( 1 );
              }
  
              // we have a value, so it has to match the system value...
              boolean result = propValue.equals( sysValue );
  
             return reverseValue ? !result : result;
         }
         else
         {
             boolean result = StringUtils.isNotEmpty( sysValue );
 
             return reverseName ? !result : result;
         }
     }
 
     @Override
     public boolean presentInConfig( Profile profile, ProfileActivationContext context, ModelProblemCollector problems )
     {
         Activation activation = profile.getActivation();
 
         if ( activation == null )
         {
             return false;
         }
 
         ActivationProperty property = activation.getProperty();
 
         if ( property == null )
         {
             return false;
         }
         return true;
     }
 
 }