package org.apache.maven.profiles.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 java.util.Properties;

 import org.apache.maven.model.Activation;

 import org.apache.maven.model.ActivationProperty;

 import org.apache.maven.model.Profile;

 import org.codehaus.plexus.context.Context;

 import org.codehaus.plexus.context.ContextException;

 import org.codehaus.plexus.personality.plexus.lifecycle.phase.Contextualizable;

 import org.codehaus.plexus.util.StringUtils;

 public class SystemPropertyProfileActivator

     extends DetectedProfileActivator implements Contextualizable

 {

     private Properties properties;

     public void contextualize(Context context) throws ContextException 

     {

         properties = (Properties)context.get("SystemProperties");

     }

     protected boolean canDetectActivation( Profile profile )

     {

         return profile.getActivation() != null && profile.getActivation().getProperty() != null;

     }

     public boolean isActive( Profile profile )

         throws ProfileActivationException

     {

         Activation activation = profile.getActivation();

         ActivationProperty property = activation.getProperty();

         if ( property != null )

         {

             String name = property.getName();

             boolean reverseName = false;

             if ( name == null )

             {

                 throw new ProfileActivationException( "The property name is required to activate the profile '"

                     + profile.getId() + "'" );

             }

             if ( name.startsWith("!") )

             {

                 reverseName = true;

                 name = name.substring( 1 );

             }

             String sysValue = properties.getProperty( 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 );

                 if ( reverseValue )

                 {

                     return !result;

                 }

                 else

                 {

                     return result;

                 }

             }

             else

             {

                 boolean result = StringUtils.isNotEmpty( sysValue );

                 if ( reverseName )

                 {

                     return !result;

                 }

                 else

                 {

                     return result;

                 }

             }

         }

         return false;

     }

 }