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1   package org.apache.maven.profiles.activation;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *  http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import java.util.Properties;
23  import org.apache.maven.model.Activation;
24  import org.apache.maven.model.ActivationProperty;
25  import org.apache.maven.model.Profile;
26  import org.codehaus.plexus.context.Context;
27  import org.codehaus.plexus.context.ContextException;
28  import org.codehaus.plexus.personality.plexus.lifecycle.phase.Contextualizable;
29  import org.codehaus.plexus.util.StringUtils;
30  
31  public class SystemPropertyProfileActivator
32      extends DetectedProfileActivator implements Contextualizable
33  {
34      private Properties properties;
35      
36      public void contextualize(Context context) throws ContextException 
37      {
38          properties = (Properties)context.get("SystemProperties");
39      }
40      
41      protected boolean canDetectActivation( Profile profile )
42      {
43          return profile.getActivation() != null && profile.getActivation().getProperty() != null;
44      }
45  
46      public boolean isActive( Profile profile )
47          throws ProfileActivationException
48      {
49          Activation activation = profile.getActivation();
50  
51          ActivationProperty property = activation.getProperty();
52  
53          if ( property != null )
54          {
55              String name = property.getName();
56              boolean reverseName = false;
57              
58              if ( name == null )
59              {
60                  throw new ProfileActivationException( "The property name is required to activate the profile '"
61                      + profile.getId() + "'" );
62              }
63              
64              if ( name.startsWith("!") )
65              {
66                  reverseName = true;
67                  name = name.substring( 1 );
68              }
69              
70              String sysValue = properties.getProperty( name );
71  
72              String propValue = property.getValue();
73              if ( StringUtils.isNotEmpty( propValue ) )
74              {
75                  boolean reverseValue = false;
76                  if ( propValue.startsWith( "!" ) )
77                  {
78                      reverseValue = true;
79                      propValue = propValue.substring( 1 );
80                  }
81                  
82                  // we have a value, so it has to match the system value...
83                  boolean result = propValue.equals( sysValue );
84                  
85                  if ( reverseValue )
86                  {
87                      return !result;
88                  }
89                  else
90                  {
91                      return result;
92                  }
93              }
94              else
95              {
96                  boolean result = StringUtils.isNotEmpty( sysValue );
97                  
98                  if ( reverseName )
99                  {
100                     return !result;
101                 }
102                 else
103                 {
104                     return result;
105                 }
106             }
107         }
108 
109         return false;
110     }
111 
112 }