package org.apache.maven.archiva.policies;

 /*

  * 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.ArrayList;

 import java.util.List;

 import java.util.Map;

 import java.util.Properties;

 import org.apache.commons.lang.StringUtils;

 /**

  * PropagateErrorsPolicy - a policy applied on error to determine how to treat the error.

  *

  * @plexus.component role="org.apache.maven.archiva.policies.DownloadErrorPolicy"

  *                   role-hint="propagate-errors-on-update"

  */

 public class PropagateErrorsOnUpdateDownloadPolicy

     implements DownloadErrorPolicy

 {

     /**

      * Signifies any error should cause a failure whether the artifact is already present or not.

      */

     public static final String ALWAYS = "always";

     /**

      * Signifies any error should cause a failure only if the artifact is not already present.

      */

     public static final String NOT_PRESENT = "artifact not already present";

     private List<String> options = new ArrayList<String>();

     public PropagateErrorsOnUpdateDownloadPolicy()

     {

         options.add( ALWAYS );

         options.add( NOT_PRESENT );

     }

     public boolean applyPolicy( String policySetting, Properties request, File localFile, Exception exception,

                              Map<String,Exception> previousExceptions )

         throws PolicyConfigurationException

     {

         if ( !options.contains( policySetting ) )

         {

             // Not a valid code.

             throw new PolicyConfigurationException( "Unknown error policy setting [" + policySetting

                 + "], valid settings are [" + StringUtils.join( options.iterator(), "," ) + "]" );

         }

         if ( ALWAYS.equals( policySetting ) )

         {

             // throw ther exception regardless

             return true;

         }

         if ( NOT_PRESENT.equals( policySetting ) )

         {

             // cancel the exception if the file exists

             return !localFile.exists();

         }

         throw new PolicyConfigurationException( "Unable to process checksum policy of [" + policySetting

             + "], please file a bug report." );

     }

     public String getDefaultOption()

     {

         return NOT_PRESENT;

     }

     public String getId()

     {

         return "propagate-errors-on-update";

     }

     public String getName()

     {

         return "Return error when";

     }

     public List<String> getOptions()

     {

         return options;

     }

 }