package org.apache.maven.plugins.enforcer;

 /*

  * 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.io.File;

 import java.util.List;

 import java.util.Map;

 import org.apache.maven.enforcer.rule.api.EnforcerRuleHelper;

 import org.apache.maven.execution.MavenSession;

 import org.apache.maven.plugin.logging.Log;

 import org.codehaus.plexus.PlexusContainer;

 import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluationException;

 import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluator;

 import org.codehaus.plexus.component.repository.exception.ComponentLookupException;

 /**

  * Default implementation of the EnforcementRuleHelper interface. This is used to help retrieve information from the

  * session and provide useful elements like the log.

  *

  * @author <a href="mailto:brianf@apache.org">Brian Fox</a>

  * @version $Id: DefaultEnforcementRuleHelper.java 805190 2009-08-17 22:30:49Z hboutemy $

  */

 public class DefaultEnforcementRuleHelper

     implements EnforcerRuleHelper

 {

     /** The log. */

     Log log;

     /** The evaluator. */

     ExpressionEvaluator evaluator;

     /** The session. */

     MavenSession session;

     /** The container. */

     PlexusContainer container;

     /**

      * Instantiates a new default enforcement rule helper.

      *

      * @param session the session

      * @param evaluator the evaluator

      * @param log the log

      * @param container the container

      */

     public DefaultEnforcementRuleHelper( MavenSession session, ExpressionEvaluator evaluator, Log log,

                                          PlexusContainer container )

     {

         this.evaluator = evaluator;

         this.log = log;

         this.session = session;

         if ( container != null )

         {

             this.container = container;

         }

         else

         {

             this.container = session.getContainer();

         }

     }

     /*

      * (non-Javadoc)

      *

      * @see org.apache.maven.enforcer.rule.api.EnforcerRuleHelper#getLog()

      */

     public Log getLog()

     {

         return log;

     }

     /*

      * (non-Javadoc)

      *

      * @see org.codehaus.plexus.component.configurator.expression.ExpressionEvaluator#alignToBaseDirectory(java.io.File)

      */

     public File alignToBaseDirectory( File theFile )

     {

         return evaluator.alignToBaseDirectory( theFile );

     }

     /*

      * (non-Javadoc)

      *

      * @see org.codehaus.plexus.component.configurator.expression.ExpressionEvaluator#evaluate(java.lang.String)

      */

     public Object evaluate( String theExpression )

         throws ExpressionEvaluationException

     {

         return evaluator.evaluate( theExpression );

     }

     /*

      * (non-Javadoc)

      *

      * @see org.apache.maven.shared.enforcer.rule.api.EnforcerRuleHelper#getRuntimeInformation()

      */

     public Object getComponent( Class clazz )

         throws ComponentLookupException

     {

         return getComponent( clazz.getName() );

     }

     /*

      * (non-Javadoc)

      *

      * @see org.apache.maven.enforcer.rule.api.EnforcerRuleHelper#lookup(java.lang.String)

      */

     public Object getComponent( String theComponentKey )

         throws ComponentLookupException

     {

         return container.lookup( theComponentKey );

     }

     /*

      * (non-Javadoc)

      *

      * @see org.apache.maven.enforcer.rule.api.EnforcerRuleHelper#lookup(java.lang.String, java.lang.String)

      */

     public Object getComponent( String theRole, String theRoleHint )

         throws ComponentLookupException

     {

         return container.lookup( theRole, theRoleHint );

     }

     /*

      * (non-Javadoc)

      *

      * @see org.apache.maven.enforcer.rule.api.EnforcerRuleHelper#lookupList(java.lang.String)

      */

     public List getComponentList( String theRole )

         throws ComponentLookupException

     {

         return container.lookupList( theRole );

     }

     /*

      * (non-Javadoc)

      *

      * @see org.apache.maven.enforcer.rule.api.EnforcerRuleHelper#lookupMap(java.lang.String)

      */

     public Map getComponentMap( String theRole )

         throws ComponentLookupException

     {

         return container.lookupMap( theRole );

     }

     /*

      * (non-Javadoc)

      *

      * @see org.apache.maven.enforcer.rule.api.EnforcerRuleHelper#getContainer()

      */

     public PlexusContainer getContainer()

     {

         return container;

     }

 }