package org.apache.maven.lifecycle;
   
   /*
    * 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 org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.component.annotations.Requirement;
  import org.codehaus.plexus.logging.Logger;
  import org.codehaus.plexus.util.StringUtils;
  
  import com.google.common.base.Preconditions;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.HashMap;
  import java.util.LinkedHashMap;
  import java.util.LinkedHashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  /**
   * @since 3.0
   * @author Jason van Zyl
   * @author Kristian Rosenvold
   */
  // TODO: The configuration for the lifecycle needs to be externalized so that I can use the annotations properly for the
  // wiring and reference and external source for the lifecycle configuration.
  @Component( role = DefaultLifecycles.class )
  public class DefaultLifecycles
  {
      public static final String[] STANDARD_LIFECYCLES = { "default", "clean", "site" };
  
      // @Configuration(source="org/apache/maven/lifecycle/lifecycles.xml")
  
      @Requirement( role = Lifecycle.class )
      private Map<String, Lifecycle> lifecycles;
  
      @Requirement
      private Logger logger;
  
      public DefaultLifecycles()
      {
      }
  
      public DefaultLifecycles( Map<String, Lifecycle> lifecycles, Logger logger )
      {
          this.lifecycles = new LinkedHashMap<String, Lifecycle>();
          this.logger = logger;
          this.lifecycles = lifecycles;
      }
  
      public Lifecycle get( String key )
      {
          return getPhaseToLifecycleMap().get( key );
      }
  
      /**
       * We use this to map all phases to the lifecycle that contains it. This is used so that a user can specify the
       * phase they want to execute and we can easily determine what lifecycle we need to run.
       *
       * @return A map of lifecycles, indexed on id
       */
      public Map<String, Lifecycle> getPhaseToLifecycleMap()
      {
          // If people are going to make their own lifecycles then we need to tell people how to namespace them correctly
          // so that they don't interfere with internally defined lifecycles.
  
          HashMap<String, Lifecycle> phaseToLifecycleMap = new HashMap<String, Lifecycle>();
  
          for ( Lifecycle lifecycle : getLifeCycles() )
          {
              if ( logger.isDebugEnabled() )
              {
                  logger.debug( "Lifecycle " + lifecycle );
              }
  
              for ( String phase : lifecycle.getPhases() )
              {
                  // The first definition wins.
                  if ( !phaseToLifecycleMap.containsKey( phase ) )
                  {
                      phaseToLifecycleMap.put( phase, lifecycle );
                 }
                 else
                 {
                     Lifecycle original = phaseToLifecycleMap.get( phase );
                     logger.warn( "Duplicated lifecycle phase " + phase + ". Defined in " + original.getId()
                         + " but also in " + lifecycle.getId() );
                 }
             }
         }
 
         return phaseToLifecycleMap;
     }
 
     public List<Lifecycle> getLifeCycles()
     {
         // ensure canonical order of standard lifecycles
         Map<String, Lifecycle> lifecycles = new LinkedHashMap<String, Lifecycle>( this.lifecycles );
 
         LinkedHashSet<String> lifecycleNames = new LinkedHashSet<String>( Arrays.asList( STANDARD_LIFECYCLES ) );
         lifecycleNames.addAll( lifecycles.keySet() );
 
         ArrayList<Lifecycle> result = new ArrayList<Lifecycle>();
         for ( String name : lifecycleNames )
         {
             Lifecycle lifecycle = lifecycles.get( name );
             Preconditions.checkNotNull( "A lifecycle must have an id.", lifecycle.getId() );
             result.add( lifecycle );
         }
 
         return result;
     }
 
     public String getLifecyclePhaseList()
     {
         Set<String> phases = new LinkedHashSet<String>();
 
         for ( Lifecycle lifecycle : getLifeCycles() )
         {
             phases.addAll( lifecycle.getPhases() );
         }
 
         return StringUtils.join( phases.iterator(), ", " );
     }
 
 }