package org.apache.maven.plugin.resources;

 /*

  * 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.apache.maven.execution.MavenSession;

 import org.apache.maven.model.Resource;

 import org.apache.maven.plugin.AbstractMojo;

 import org.apache.maven.plugin.MojoExecutionException;

 import org.apache.maven.project.MavenProject;

 import org.apache.maven.shared.filtering.MavenFilteringException;

 import org.apache.maven.shared.filtering.MavenResourcesExecution;

 import org.apache.maven.shared.filtering.MavenResourcesFiltering;

 import org.codehaus.plexus.util.ReaderFactory;

 import org.codehaus.plexus.util.StringUtils;

 import java.io.File;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.Collections;

 import java.util.Iterator;

 import java.util.LinkedHashSet;

 import java.util.List;

 /**

  * Copy resources for the main source code to the main output directory.

  *

  * @author <a href="michal.maczka@dimatics.com">Michal Maczka</a>

  * @author <a href="mailto:jason@maven.org">Jason van Zyl</a>

  * @author Andreas Hoheneder

  * @author William Ferguson

  * @version $Id: ResourcesMojo.java 943020 2010-05-11 06:53:57Z krosenvold $

  * @goal resources

  * @phase process-resources

  * @threadSafe

  * 

  */

 public class ResourcesMojo

     extends AbstractMojo

 {

     /**

      * The character encoding scheme to be applied when filtering resources.

      *

      * @parameter expression="${encoding}" default-value="${project.build.sourceEncoding}"

      */

     protected String encoding;

     /**

      * The output directory into which to copy the resources.

      *

      * @parameter default-value="${project.build.outputDirectory}"

      * @required

      */

     private File outputDirectory;

     /**

      * The list of resources we want to transfer.

      *

      * @parameter default-value="${project.resources}"

      * @required

      * @readonly

      */

     private List resources;

     /**

      * @parameter default-value="${project}"

      * @required

      * @readonly

      */

     protected MavenProject project;

     /**

      * The list of additional filter properties files to be used along with System and project

      * properties, which would be used for the filtering.

      * <br/>

      * See also: {@link ResourcesMojo#filters}.

      *

      * @parameter default-value="${project.build.filters}"

      * @readonly

      * @since 2.4

      */

     protected List buildFilters;

     /**

      * The list of extra filter properties files to be used along with System properties,

      * project properties, and filter properties files specified in the POM build/filters section,

      * which should be used for the filtering during the current mojo execution.

      * <br/>

      * Normally, these will be configured from a plugin's execution section, to provide a different

      * set of filters for a particular execution. For instance, starting in Maven 2.2.0, you have the

      * option of configuring executions with the id's <code>default-resources</code> and 

      * <code>default-testResources</code> to supply different configurations for the two 

      * different types of resources. By supplying <code>extraFilters</code> configurations, you

      * can separate which filters are used for which type of resource.

      *

      * @parameter

      */

     protected List filters;

     /**

      * If false, don't use the filters specified in the build/filters section of the POM when

      * processing resources in this mojo execution.

      * <br/>

      * See also: {@link ResourcesMojo#buildFilters} and {@link ResourcesMojo#filters}

      * @parameter default-value="true"

      * @since 2.4

      */

     protected boolean useBuildFilters;

     /**

      * 

      * @component role="org.apache.maven.shared.filtering.MavenResourcesFiltering" role-hint="default"

      * @required

      */    

     protected MavenResourcesFiltering mavenResourcesFiltering;    

     /**

      * @parameter default-value="${session}"

      * @readonly

      * @required

      */

     protected MavenSession session;   

     /**

      * Expression preceded with the String won't be interpolated 

      * \${foo} will be replaced with ${foo}

      * @parameter default-value="${maven.resources.escapeString}"

      * @since 2.3

      */    

     protected String escapeString;

     /**

      * Overwrite existing files even if the destination files are newer.

      * @parameter expression="${maven.resources.overwrite}" default-value="false"

      * @since 2.3

      */

     private boolean overwrite;

     /**

      * Copy any empty directories included in the Ressources.

      * @parameter expression="${maven.resources.includeEmptyDirs}" default-value="false"

      * @since 2.3

      */    

     protected boolean includeEmptyDirs;

     /**

      * Additionnal file extensions to not apply filtering (already defined are : jpg, jpeg, gif, bmp, png)

      * @parameter 

      * @since 2.3

      */

     protected List nonFilteredFileExtensions;

     /**

      * Whether to escape backslashes and colons in windows-style paths.

      * @parameter expression="${maven.resources.escapeWindowsPaths}" default-value="true"

      * @since 2.4

      */

     protected boolean escapeWindowsPaths;

     /**

      * <p>

      * Set of delimiters for expressions to filter within the resources. These delimiters are specified in the

      * form 'beginToken*endToken'. If no '*' is given, the delimiter is assumed to be the same for start and end.

      * </p><p>

      * So, the default filtering delimiters might be specified as:

      * </p>

      * <pre>

      * <delimiters>

      *   <delimiter>${*}&lt/delimiter>

      *   <delimiter>@&lt/delimiter>

      * </delimiters>

      * </pre>

      * <p>

      * Since the '@' delimiter is the same on both ends, we don't need to specify '@*@' (though we can).

      * </p>

      * @parameter

      * @since 2.4

      */

     protected List delimiters;

     /**

      * @parameter default-value="true"

      * @since 2.4

      */

     protected boolean useDefaultDelimiters;

     public void execute()

         throws MojoExecutionException

     {

         try

         {

             if ( StringUtils.isEmpty( encoding ) && isFilteringEnabled( getResources() ) )

             {

                 getLog().warn(

                                "File encoding has not been set, using platform encoding " + ReaderFactory.FILE_ENCODING

                                    + ", i.e. build is platform dependent!" );

             }

             List filters = getCombinedFiltersList();

             MavenResourcesExecution mavenResourcesExecution = new MavenResourcesExecution( getResources(), 

                                                                                            getOutputDirectory(),

                                                                                            project, encoding, filters,

                                                                                            Collections.EMPTY_LIST,

                                                                                            session );

             mavenResourcesExecution.setEscapeWindowsPaths( escapeWindowsPaths );

             // never include project build filters in this call, since we've already accounted for the POM build filters

             // above, in getCombinedFiltersList().

             mavenResourcesExecution.setInjectProjectBuildFilters( false );

             mavenResourcesExecution.setEscapeString( escapeString );

             mavenResourcesExecution.setOverwrite( overwrite );

             mavenResourcesExecution.setIncludeEmptyDirs( includeEmptyDirs );

             // if these are NOT set, just use the defaults, which are '${*}' and '@'.

             if ( delimiters != null && !delimiters.isEmpty() )

             {

                 LinkedHashSet delims = new LinkedHashSet();

                 if ( useDefaultDelimiters )

                 {

                     delims.addAll( mavenResourcesExecution.getDelimiters() );

                 }

                 for ( Iterator dIt = delimiters.iterator(); dIt.hasNext(); )

                 {

                     String delim = (String) dIt.next();

                     if ( delim == null )

                     {

                         // FIXME: ${filter:*} could also trigger this condition. Need a better long-term solution.

                         delims.add( "${*}" );

                     }

                     else

                     {

                         delims.add( delim );

                     }

                 }

                 mavenResourcesExecution.setDelimiters( delims );

             }

             if ( nonFilteredFileExtensions != null )

             {

                 mavenResourcesExecution.setNonFilteredFileExtensions( nonFilteredFileExtensions );

             }

             mavenResourcesFiltering.filterResources( mavenResourcesExecution );

         }

         catch ( MavenFilteringException e )

         {

             throw new MojoExecutionException( e.getMessage(), e );

         }

     }

     protected List getCombinedFiltersList()

     {

         if ( filters == null || filters.isEmpty() )

         {

             return useBuildFilters ? buildFilters : null;

         }

         else

         {

             List result = new ArrayList();

             if ( useBuildFilters && buildFilters != null && !buildFilters.isEmpty() )

             {

                 result.addAll( buildFilters );

             }

             result.addAll( filters );

             return result;

         }

     }

     /**

      * Determines whether filtering has been enabled for any resource.

      * 

      * @param resources The set of resources to check for filtering, may be <code>null</code>.

      * @return <code>true</code> if at least one resource uses filtering, <code>false</code> otherwise.

      */

     private boolean isFilteringEnabled( Collection resources )

     {

         if ( resources != null )

         {

             for ( Iterator i = resources.iterator(); i.hasNext(); )

             {

                 Resource resource = (Resource) i.next();

                 if ( resource.isFiltering() )

                 {

                     return true;

                 }

             }

         }

         return false;

     }

     public List getResources()

     {

         return resources;

     }

     public void setResources( List resources )

     {

         this.resources = resources;

     }

     public File getOutputDirectory()

     {

         return outputDirectory;

     }

     public void setOutputDirectory( File outputDirectory )

     {

         this.outputDirectory = outputDirectory;

     }

     public boolean isOverwrite()

     {

         return overwrite;

     }

     public void setOverwrite( boolean overwrite )

     {

         this.overwrite = overwrite;

     }

     public boolean isIncludeEmptyDirs()

     {

         return includeEmptyDirs;

     }

     public void setIncludeEmptyDirs( boolean includeEmptyDirs )

     {

         this.includeEmptyDirs = includeEmptyDirs;

     }

     public List getFilters()

     {

         return filters;

     }

     public void setFilters( List filters )

     {

         this.filters = filters;

     }

     public List getDelimiters()

     {

         return delimiters;

     }

     public void setDelimiters( List delimiters )

     {

         this.delimiters = delimiters;

     }

     public boolean isUseDefaultDelimiters()

     {

         return useDefaultDelimiters;

     }

     public void setUseDefaultDelimiters( boolean useDefaultDelimiters )

     {

         this.useDefaultDelimiters = useDefaultDelimiters;

     }

 }