/*

  * 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.

  */

 package org.apache.maven.plugin.ide;

 import java.io.File;

 import java.io.FileInputStream;

 import java.io.FileOutputStream;

 import java.io.IOException;

 import java.io.InputStream;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.HashMap;

 import java.util.HashSet;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Map;

 import java.util.Properties;

 import java.util.Set;

 import java.util.TreeSet;

 import java.util.jar.Attributes;

 import java.util.jar.JarFile;

 import java.util.jar.Manifest;

 import java.util.zip.ZipFile;

 import org.apache.maven.artifact.Artifact;

 import org.apache.maven.artifact.factory.ArtifactFactory;

 import org.apache.maven.artifact.metadata.ArtifactMetadataSource;

 import org.apache.maven.artifact.repository.ArtifactRepository;

 import org.apache.maven.artifact.resolver.ArtifactCollector;

 import org.apache.maven.artifact.resolver.ArtifactNotFoundException;

 import org.apache.maven.artifact.resolver.ArtifactResolutionException;

 import org.apache.maven.artifact.resolver.ArtifactResolutionResult;

 import org.apache.maven.artifact.resolver.ArtifactResolver;

 import org.apache.maven.artifact.resolver.DebugResolutionListener;

 import org.apache.maven.artifact.resolver.ResolutionNode;

 import org.apache.maven.artifact.resolver.WarningResolutionListener;

 import org.apache.maven.artifact.resolver.filter.ArtifactFilter;

 import org.apache.maven.artifact.resolver.filter.ExcludesArtifactFilter;

 import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException;

 import org.apache.maven.artifact.versioning.VersionRange;

 import org.apache.maven.model.Dependency;

 import org.apache.maven.model.DependencyManagement;

 import org.apache.maven.model.Exclusion;

 import org.apache.maven.plugin.AbstractMojo;

 import org.apache.maven.plugin.MojoExecutionException;

 import org.apache.maven.plugin.MojoFailureException;

 import org.apache.maven.plugin.eclipse.Constants;

 import org.apache.maven.project.MavenProject;

 import org.codehaus.plexus.logging.LogEnabled;

 import org.codehaus.plexus.logging.Logger;

 import org.codehaus.plexus.util.IOUtil;

 /**

  * Abstract base plugin which takes care of the common stuff usually needed by maven IDE plugins. A plugin extending

  * AbstractIdeSupportMojo should implement the <code>setup()</code> and <code>writeConfiguration()</code> methods,

  * plus the getters needed to get the various configuration flags and required components. The lifecycle:

  * 

  * <pre>

  *       *** calls setup() where you can configure your specific stuff and stop the mojo from execute if appropriate ***

  *       - manually resolve project dependencies, NOT failing if a dependency is missing

  *       - compute project references (reactor projects) if the getUseProjectReferences() flag is set

  *       - download sources/javadocs if the getDownloadSources() flag is set

  *       *** calls writeConfiguration(), passing the list of resolved referenced dependencies ***

  *       - report the list of missing sources or just tell how to turn this feature on if the flag was disabled

  * </pre>

  * 

  * @author Fabrizio Giustina

  * @version $Id: AbstractIdeSupportMojo.java 628794 2008-02-18 16:09:11Z aheritier $

  */

 public abstract class AbstractIdeSupportMojo

     extends AbstractMojo

     implements LogEnabled

 {

     /**

      * The project whose project files to create.

      * 

      * @parameter expression="${project}"

      * @required

      * @readonly

      */

     protected MavenProject project;

     /**

      * The currently executed project (can be a reactor project).

      * 

      * @parameter expression="${executedProject}"

      * @readonly

      */

     protected MavenProject executedProject;

     /**

      * The project packaging.

      * 

      * @parameter expression="${project.packaging}"

      */

     protected String packaging;

     /**

      * Artifact factory, needed to download source jars for inclusion in classpath.

      * 

      * @component role="org.apache.maven.artifact.factory.ArtifactFactory"

      * @required

      * @readonly

      */

     protected ArtifactFactory artifactFactory;

     /**

      * Artifact resolver, needed to download source jars for inclusion in classpath.

      * 

      * @component role="org.apache.maven.artifact.resolver.ArtifactResolver"

      * @required

      * @readonly

      */

     protected ArtifactResolver artifactResolver;

     /**

      * Artifact collector, needed to resolve dependencies.

      * 

      * @component role="org.apache.maven.artifact.resolver.ArtifactCollector"

      * @required

      * @readonly

      */

     protected ArtifactCollector artifactCollector;

     /**

      * @component role="org.apache.maven.artifact.metadata.ArtifactMetadataSource" hint="maven"

      */

     protected ArtifactMetadataSource artifactMetadataSource;

     /**

      * Remote repositories which will be searched for source attachments.

      * 

      * @parameter expression="${project.remoteArtifactRepositories}"

      * @required

      * @readonly

      */

     protected List remoteArtifactRepositories;

     /**

      * Local maven repository.

      * 

      * @parameter expression="${localRepository}"

      * @required

      * @readonly

      */

     protected ArtifactRepository localRepository;

     /**

      * If the executed project is a reactor project, this will contains the full list of projects in the reactor.

      * 

      * @parameter expression="${reactorProjects}"

      * @required

      * @readonly

      */

     protected List reactorProjects;

     /**

      * Skip the operation when true.

      * 

      * @parameter expression="${eclipse.skip}" default-value="false"

      */

     private boolean skip;

     /**

      * Enables/disables the downloading of source attachments. Defaults to false. When this flag is <code>true</code>

      * remote repositories are checked for sources: in order to avoid repeated check for unavailable source archives, a

      * status cache is mantained into the target dir of the root project. Run <code>mvn:clean</code> or delete the

      * file <code>mvn-eclipse-cache.properties</code> in order to reset this cache.

      * 

      * @parameter expression="${downloadSources}"

      */

     protected boolean downloadSources;

     /**

      * Enables/disables the downloading of javadoc attachments. Defaults to false. When this flag is <code>true</code>

      * remote repositories are checked for javadocs: in order to avoid repeated check for unavailable javadoc archives,

      * a status cache is mantained into the target dir of the root project. Run <code>mvn:clean</code> or delete the

      * file <code>mvn-eclipse-cache.properties</code> in order to reset this cache.

      * 

      * @parameter expression="${downloadJavadocs}"

      */

     protected boolean downloadJavadocs;

     /**

      * Plexus logger needed for debugging manual artifact resolution.

      */

     protected Logger logger;

     /**

      * Getter for <code>artifactMetadataSource</code>.

      * 

      * @return Returns the artifactMetadataSource.

      */

     public ArtifactMetadataSource getArtifactMetadataSource()

     {

         return artifactMetadataSource;

     }

     /**

      * Setter for <code>artifactMetadataSource</code>.

      * 

      * @param artifactMetadataSource The artifactMetadataSource to set.

      */

     public void setArtifactMetadataSource( ArtifactMetadataSource artifactMetadataSource )

     {

         this.artifactMetadataSource = artifactMetadataSource;

     }

     /**

      * Getter for <code>project</code>.

      * 

      * @return Returns the project.

      */

     public MavenProject getProject()

     {

         return project;

     }

     /**

      * Setter for <code>project</code>.

      * 

      * @param project The project to set.

      */

     public void setProject( MavenProject project )

     {

         this.project = project;

     }

     /**

      * Getter for <code>reactorProjects</code>.

      * 

      * @return Returns the reactorProjects.

      */

     public List getReactorProjects()

     {

         return reactorProjects;

     }

     /**

      * Setter for <code>reactorProjects</code>.

      * 

      * @param reactorProjects The reactorProjects to set.

      */

     public void setReactorProjects( List reactorProjects )

     {

         this.reactorProjects = reactorProjects;

     }

     /**

      * Getter for <code>remoteArtifactRepositories</code>.

      * 

      * @return Returns the remoteArtifactRepositories.

      */

     public List getRemoteArtifactRepositories()

     {

         return remoteArtifactRepositories;

     }

     /**

      * Setter for <code>remoteArtifactRepositories</code>.

      * 

      * @param remoteArtifactRepositories The remoteArtifactRepositories to set.

      */

     public void setRemoteArtifactRepositories( List remoteArtifactRepositories )

     {

         this.remoteArtifactRepositories = remoteArtifactRepositories;

     }

     /**

      * Getter for <code>artifactFactory</code>.

      * 

      * @return Returns the artifactFactory.

      */

     public ArtifactFactory getArtifactFactory()

     {

         return artifactFactory;

     }

     /**

      * Setter for <code>artifactFactory</code>.

      * 

      * @param artifactFactory The artifactFactory to set.

      */

     public void setArtifactFactory( ArtifactFactory artifactFactory )

     {

         this.artifactFactory = artifactFactory;

     }

     /**

      * Getter for <code>artifactResolver</code>.

      * 

      * @return Returns the artifactResolver.

      */

     public ArtifactResolver getArtifactResolver()

     {

         return artifactResolver;

     }

     /**

      * Setter for <code>artifactResolver</code>.

      * 

      * @param artifactResolver The artifactResolver to set.

      */

     public void setArtifactResolver( ArtifactResolver artifactResolver )

     {

         this.artifactResolver = artifactResolver;

     }

     /**

      * Getter for <code>executedProject</code>.

      * 

      * @return Returns the executedProject.

      */

     public MavenProject getExecutedProject()

     {

         return executedProject;

     }

     /**

      * Setter for <code>executedProject</code>.

      * 

      * @param executedProject The executedProject to set.

      */

     public void setExecutedProject( MavenProject executedProject )

     {

         this.executedProject = executedProject;

     }

     /**

      * Getter for <code>localRepository</code>.

      * 

      * @return Returns the localRepository.

      */

     public ArtifactRepository getLocalRepository()

     {

         return localRepository;

     }

     /**

      * Setter for <code>localRepository</code>.

      * 

      * @param localRepository The localRepository to set.

      */

     public void setLocalRepository( ArtifactRepository localRepository )

     {

         this.localRepository = localRepository;

     }

     /**

      * Getter for <code>downloadJavadocs</code>.

      * 

      * @return Returns the downloadJavadocs.

      */

     public boolean getDownloadJavadocs()

     {

         return downloadJavadocs;

     }

     /**

      * Setter for <code>downloadJavadocs</code>.

      * 

      * @param downloadJavadocs The downloadJavadocs to set.

      */

     public void setDownloadJavadocs( boolean downloadJavadoc )

     {

         downloadJavadocs = downloadJavadoc;

     }

     /**

      * Getter for <code>downloadSources</code>.

      * 

      * @return Returns the downloadSources.

      */

     public boolean getDownloadSources()

     {

         return downloadSources;

     }

     /**

      * Setter for <code>downloadSources</code>.

      * 

      * @param downloadSources The downloadSources to set.

      */

     public void setDownloadSources( boolean downloadSources )

     {

         this.downloadSources = downloadSources;

     }

     protected void setResolveDependencies( boolean resolveDependencies )

     {

         this.resolveDependencies = resolveDependencies;

     }

     protected boolean isResolveDependencies()

     {

         return resolveDependencies;

     }

     /**

      * return <code>false</code> if projects available in a reactor build should be considered normal dependencies,

      * <code>true</code> if referenced project will be linked and not need artifact resolution.

      * 

      * @return <code>true</code> if referenced project will be linked and not need artifact resolution

      */

     protected abstract boolean getUseProjectReferences();

     /**

      * Hook for preparation steps before the actual plugin execution.

      * 

      * @return <code>true</code> if execution should continue or <code>false</code> if not.

      * @throws MojoExecutionException generic mojo exception

      */

     protected abstract boolean setup()

         throws MojoExecutionException;

     /**

      * Main plugin method where dependencies should be processed in order to generate IDE configuration files.

      * 

      * @param deps list of <code>IdeDependency</code> objects, with artifacts, sources and javadocs already resolved

      * @throws MojoExecutionException generic mojo exception

      */

     protected abstract void writeConfiguration( IdeDependency[] deps )

         throws MojoExecutionException;

     /**

      * Not a plugin parameter. Collect the list of dependencies with a missing source artifact for the final report.

      */

     private List missingSourceDependencies = new ArrayList();

     /**

      * Not a plugin parameter. Collect the list of dependencies with a missing javadoc artifact for the final report.

      */

     // TODO merge this with the missingSourceDependencies in a classifier based map?

     private List missingJavadocDependencies = new ArrayList();

     /**

      * Cached array of resolved dependencies.

      */

     private IdeDependency[] ideDeps;

     /**

      * Flag for mojo implementations to control whether normal maven dependencies should be resolved. Default value is

      * true.

      */

     private boolean resolveDependencies = true;

     /**

      * @see org.codehaus.plexus.logging.LogEnabled#enableLogging(org.codehaus.plexus.logging.Logger)

      */

     public void enableLogging( Logger logger )

     {

         this.logger = logger;

     }

     /**

      * @see org.apache.maven.plugin.Mojo#execute()

      */

     public final void execute()

         throws MojoExecutionException, MojoFailureException

     {

         if ( skip )

         {

             return;

         }

         boolean processProject = setup();

         if ( !processProject )

         {

             return;

         }

         // resolve artifacts

         IdeDependency[] deps = doDependencyResolution();

         resolveSourceAndJavadocArtifacts( deps );

         writeConfiguration( deps );

         reportMissingArtifacts();

     }

     /**

      * Resolve project dependencies. Manual resolution is needed in order to avoid resolution of multiproject artifacts

      * (if projects will be linked each other an installed jar is not needed) and to avoid a failure when a jar is

      * missing.

      * 

      * @throws MojoExecutionException if dependencies can't be resolved

      * @return resolved IDE dependencies, with attached jars for non-reactor dependencies

      */

     protected IdeDependency[] doDependencyResolution()

         throws MojoExecutionException

     {

         if ( ideDeps == null )

         {

             if ( resolveDependencies )

             {

                 MavenProject project = getProject();

                 ArtifactRepository localRepo = getLocalRepository();

                 List deps = getProject().getDependencies();

                 // Collect the list of resolved IdeDependencies.

                 List dependencies = new ArrayList();

                 if ( deps != null )

                 {

                     Map managedVersions =

                         createManagedVersionMap( getArtifactFactory(), project.getId(),

                                                  project.getDependencyManagement() );

                     ArtifactResolutionResult artifactResolutionResult = null;

                     try

                     {

                         List listeners = new ArrayList();

                         if ( logger.isDebugEnabled() )

                         {

                             listeners.add( new DebugResolutionListener( logger ) );

                         }

                         listeners.add( new WarningResolutionListener( logger ) );

                         artifactResolutionResult =

                             artifactCollector.collect( getProjectArtifacts(), project.getArtifact(), managedVersions,

                                                        localRepo, project.getRemoteArtifactRepositories(),

                                                        getArtifactMetadataSource(), null, listeners );

                     }

                     catch ( ArtifactResolutionException e )

                     {

                         getLog().debug( e.getMessage(), e );

                         getLog().error(

                                         Messages.getString( "artifactresolution", new Object[] { //$NON-NLS-1$

                                                             e.getGroupId(), e.getArtifactId(), e.getVersion(),

                                                                 e.getMessage() } ) );

                         // if we are here artifactResolutionResult is null, create a project without dependencies but

                         // don't fail

                         // (this could be a reactor projects, we don't want to fail everything)

                         // Causes MECLIPSE-185. Not sure if it should be handled this way??

                         return new IdeDependency[0];

                     }

                     // keep track of added reactor projects in order to avoid duplicates

                     Set emittedReactorProjectId = new HashSet();

                     for ( Iterator i = artifactResolutionResult.getArtifactResolutionNodes().iterator(); i.hasNext(); )

                     {

                         ResolutionNode node = (ResolutionNode) i.next();

                         int dependencyDepth = node.getDepth();

                         Artifact art = node.getArtifact();

                         // don't resolve jars for reactor projects

                         if ( hasToResolveJar( art ) )

                         {

                             try

                             {

                                 artifactResolver.resolve( art, node.getRemoteRepositories(), localRepository );

                             }

                             catch ( ArtifactNotFoundException e )

                             {

                                 getLog().debug( e.getMessage(), e );

                                 getLog().warn(

                                                Messages.getString( "artifactdownload", new Object[] { //$NON-NLS-1$

                                                                    e.getGroupId(), e.getArtifactId(), e.getVersion(),

                                                                        e.getMessage() } ) );

                             }

                             catch ( ArtifactResolutionException e )

                             {

                                 getLog().debug( e.getMessage(), e );

                                 getLog().warn(

                                                Messages.getString( "artifactresolution", new Object[] { //$NON-NLS-1$

                                                                    e.getGroupId(), e.getArtifactId(), e.getVersion(),

                                                                        e.getMessage() } ) );

                             }

                         }

                         boolean includeArtifact = true;

                         if ( getExcludes() != null )

                         {

                             String artifactFullId = art.getGroupId() + ":" + art.getArtifactId();

                             if ( getExcludes().contains( artifactFullId ) )

                             {

                                 getLog().info( "excluded: " + artifactFullId );

                                 includeArtifact = false;

                             }

                         }

                         if ( includeArtifact &&

                             ( !( getUseProjectReferences() && isAvailableAsAReactorProject( art ) ) || emittedReactorProjectId.add( art.getGroupId() +

                                 '-' + art.getArtifactId() ) ) )

                         {

                             // the following doesn't work: art.getArtifactHandler().getPackaging() always returns "jar"

                             // also

                             // if the packaging specified in pom.xml is different.

                             // osgi-bundle packaging is provided by the felix osgi plugin

                             // eclipse-plugin packaging is provided by this eclipse plugin

                             // String packaging = art.getArtifactHandler().getPackaging();

                             // boolean isOsgiBundle = "osgi-bundle".equals( packaging ) || "eclipse-plugin".equals(

                             // packaging );

                             // we need to check the manifest, if "Bundle-SymbolicName" is there the artifact can be

                             // considered

                             // an osgi bundle

                             boolean isOsgiBundle = false;

                             String osgiSymbolicName = null;

                             if ( art.getFile() != null )

                             {

                                 JarFile jarFile = null;

                                 try

                                 {

                                     jarFile = new JarFile( art.getFile(), false, ZipFile.OPEN_READ );

                                     Manifest manifest = jarFile.getManifest();

                                     if ( manifest != null )

                                     {

                                         osgiSymbolicName =

                                             manifest.getMainAttributes().getValue(

                                                                                    new Attributes.Name(

                                                                                                         "Bundle-SymbolicName" ) );

                                     }

                                 }

                                 catch ( IOException e )

                                 {

                                     getLog().info( "Unable to read jar manifest from " + art.getFile() );

                                 }

                                 finally

                                 {

                                     if ( jarFile != null )

                                     {

                                         try

                                         {

                                             jarFile.close();

                                         }

                                         catch ( IOException e )

                                         {

                                             // ignore

                                         }

                                     }

                                 }

                             }

                             isOsgiBundle = osgiSymbolicName != null;

                             IdeDependency dep =

                                 new IdeDependency( art.getGroupId(), art.getArtifactId(), art.getVersion(),

                                                    art.getClassifier(), useProjectReference( art ),

                                                    Artifact.SCOPE_TEST.equals( art.getScope() ),

                                                    Artifact.SCOPE_SYSTEM.equals( art.getScope() ),

                                                    Artifact.SCOPE_PROVIDED.equals( art.getScope() ),

                                                    art.getArtifactHandler().isAddedToClasspath(), art.getFile(),

                                                    art.getType(), isOsgiBundle, osgiSymbolicName, dependencyDepth,

                                                    getProjectNameForArifact( art ) );

                             // no duplicate entries allowed. System paths can cause this problem.

                             if ( !dependencies.contains( dep ) )

                             {

                                 dependencies.add( dep );

                             }

                         }

                     }

                     // @todo a final report with the list of

                     // missingArtifacts?

                 }

                 ideDeps = (IdeDependency[]) dependencies.toArray( new IdeDependency[dependencies.size()] );

             }

             else

             {

                 ideDeps = new IdeDependency[0];

             }

         }

         return ideDeps;

     }

     /**

      * Find the name of the project as used in eclipse.

      * 

      * @param artifact The artifact to find the eclipse name for.

      * @return The name os the eclipse project.

      */

     abstract public String getProjectNameForArifact( Artifact artifact );

     /**

      * Returns the list of project artifacts. Also artifacts generated from referenced projects will be added, but with

      * the <code>resolved</code> property set to true.

      * 

      * @return list of projects artifacts

      * @throws MojoExecutionException if unable to parse dependency versions

      */

     private Set getProjectArtifacts()

         throws MojoExecutionException

     {

         // keep it sorted, this should avoid random classpath order in tests

         Set artifacts = new TreeSet();

         for ( Iterator dependencies = getProject().getDependencies().iterator(); dependencies.hasNext(); )

         {

             Dependency dependency = (Dependency) dependencies.next();

             String groupId = dependency.getGroupId();

             String artifactId = dependency.getArtifactId();

             VersionRange versionRange;

             try

             {

                 versionRange = VersionRange.createFromVersionSpec( dependency.getVersion() );

             }

             catch ( InvalidVersionSpecificationException e )

             {

                 throw new MojoExecutionException(

                                                   Messages.getString(

                                                                       "unabletoparseversion", new Object[] { //$NON-NLS-1$

                                                                       dependency.getArtifactId(),

                                                                           dependency.getVersion(),

                                                                           dependency.getManagementKey(), e.getMessage() } ),

                                                   e );

             }

             String type = dependency.getType();

             if ( type == null )

             {

                 type = Constants.PROJECT_PACKAGING_JAR;

             }

             String classifier = dependency.getClassifier();

             boolean optional = dependency.isOptional();

             String scope = dependency.getScope();

             if ( scope == null )

             {

                 scope = Artifact.SCOPE_COMPILE;

             }

             Artifact art =

                 getArtifactFactory().createDependencyArtifact( groupId, artifactId, versionRange, type, classifier,

                                                                scope, optional );

             if ( scope.equalsIgnoreCase( Artifact.SCOPE_SYSTEM ) )

             {

                 art.setFile( new File( dependency.getSystemPath() ) );

             }

             List exclusions = new ArrayList();

             for ( Iterator j = dependency.getExclusions().iterator(); j.hasNext(); )

             {

                 Exclusion e = (Exclusion) j.next();

                 exclusions.add( e.getGroupId() + ":" + e.getArtifactId() ); //$NON-NLS-1$

             }

             ArtifactFilter newFilter = new ExcludesArtifactFilter( exclusions );

             art.setDependencyFilter( newFilter );

             artifacts.add( art );

         }

         return artifacts;

     }

     /**

      * Utility method that locates a project producing the given artifact.

      * 

      * @param artifact the artifact a project should produce.

      * @return <code>true</code> if the artifact is produced by a reactor projectart.

      */

     protected boolean isAvailableAsAReactorProject( Artifact artifact )

     {

         if ( reactorProjects != null )

         {

             for ( Iterator iter = reactorProjects.iterator(); iter.hasNext(); )

             {

                 MavenProject reactorProject = (MavenProject) iter.next();

                 if ( reactorProject.getGroupId().equals( artifact.getGroupId() ) &&

                     reactorProject.getArtifactId().equals( artifact.getArtifactId() ) )

                 {

                     if ( reactorProject.getVersion().equals( artifact.getVersion() ) )

                     {

                         return true;

                     }

                     else

                     {

                         getLog().info(

                                        "Artifact " +

                                            artifact.getId() +

                                            " already available as a reactor project, but with different version. Expected: " +

                                            artifact.getVersion() + ", found: " + reactorProject.getVersion() );

                     }

                 }

             }

         }

         return false;

     }

     /**

      * @return an array with all dependencies avalaible in the workspace, to be implemented by the subclasses.

      */

     protected IdeDependency[] getWorkspaceArtefacts()

     {

         return new IdeDependency[0];

     }

     private Map createManagedVersionMap( ArtifactFactory artifactFactory, String projectId,

                                          DependencyManagement dependencyManagement )

         throws MojoExecutionException

     {

         Map map;

         if ( dependencyManagement != null && dependencyManagement.getDependencies() != null )

         {

             map = new HashMap();

             for ( Iterator i = dependencyManagement.getDependencies().iterator(); i.hasNext(); )

             {

                 Dependency d = (Dependency) i.next();

                 try

                 {

                     VersionRange versionRange = VersionRange.createFromVersionSpec( d.getVersion() );

                     Artifact artifact =

                         artifactFactory.createDependencyArtifact( d.getGroupId(), d.getArtifactId(), versionRange,

                                                                   d.getType(), d.getClassifier(), d.getScope(),

                                                                   d.isOptional() );

                     map.put( d.getManagementKey(), artifact );

                 }

                 catch ( InvalidVersionSpecificationException e )

                 {

                     throw new MojoExecutionException( Messages.getString( "unabletoparseversion", new Object[] { //$NON-NLS-1$

                                                                           projectId, d.getVersion(),

                                                                               d.getManagementKey(), e.getMessage() } ),

                                                       e );

                 }

             }

         }

         else

         {

             map = Collections.EMPTY_MAP;

         }

         return map;

     }

     /**

      * Find the reactor target dir. executedProject doesn't have the multiproject root dir set, and the only way to

      * extract it is iterating on parent projects.

      * 

      * @param prj current project

      * @return the parent target dir.

      */

     private File getReactorTargetDir( MavenProject prj )

     {

         if ( prj.getParent() != null )

         {

             if ( prj.getParent().getBasedir() != null && prj.getParent().getBasedir().exists() )

             {

                 return getReactorTargetDir( prj.getParent() );

             }

         }

         return new File( prj.getBuild().getDirectory() );

     }

     /**

      * Resolve source artifacts and download them if <code>downloadSources</code> is <code>true</code>. Source and

      * javadocs artifacts will be attached to the <code>IdeDependency</code> Resolve source and javadoc artifacts. The

      * resolved artifacts will be downloaded based on the <code>downloadSources</code> and

      * <code>downloadJavadocs</code> attributes. Source and

      * 

      * @param deps resolved dependencies

      */

     private void resolveSourceAndJavadocArtifacts( IdeDependency[] deps )

     {

         File reactorTargetDir = getReactorTargetDir( project );

         File unavailableArtifactsTmpFile = new File( reactorTargetDir, "mvn-eclipse-cache.properties" );

         getLog().info( "Using source status cache: " + unavailableArtifactsTmpFile.getAbsolutePath() );

         // create target dir if missing

         if ( !unavailableArtifactsTmpFile.getParentFile().exists() )

         {

             unavailableArtifactsTmpFile.getParentFile().mkdirs();

         }

         Properties unavailableArtifactsCache = new Properties();

         if ( unavailableArtifactsTmpFile.exists() )

         {

             InputStream is = null;

             try

             {

                 is = new FileInputStream( unavailableArtifactsTmpFile );

                 unavailableArtifactsCache.load( is );

             }

             catch ( IOException e )

             {

                 getLog().warn( "Unable to read source status for reactor projects" );

             }

             finally

             {

                 IOUtil.close( is );

             }

         }

         final List missingSources =

             resolveDependenciesWithClassifier( deps, "sources", getDownloadSources(), unavailableArtifactsCache );

         missingSourceDependencies.addAll( missingSources );

         final List missingJavadocs =

             resolveDependenciesWithClassifier( deps, "javadoc", getDownloadJavadocs(), unavailableArtifactsCache );

         missingJavadocDependencies.addAll( missingJavadocs );

         FileOutputStream fos = null;

         try

         {

             fos = new FileOutputStream( unavailableArtifactsTmpFile );

             unavailableArtifactsCache.store( fos, "Temporary index for unavailable sources and javadocs" );

         }

         catch ( IOException e )

         {

             getLog().warn( "Unable to cache source status for reactor projects" );

         }

         finally

         {

             IOUtil.close( fos );

         }

     }

     /**

      * Resolve the required artifacts for each of the dependency. <code>sources</code> or <code>javadoc</code>

      * artifacts (depending on the <code>classifier</code>) are attached to the dependency.

      * 

      * @param deps resolved dependencies

      * @param inClassifier the classifier we are looking for (either <code>sources</code> or <code>javadoc</code>)

      * @param includeRemoteRepositories flag whether we should search remote repositories for the artifacts or not

      * @param unavailableArtifactsCache cache of unavailable artifacts

      * @return the list of dependencies for which the required artifact was not found

      */

     private List resolveDependenciesWithClassifier( IdeDependency[] deps, String inClassifier,

                                                     boolean includeRemoteRepositories,

                                                     Properties unavailableArtifactsCache )

     {

         List missingClassifierDependencies = new ArrayList();

         // if downloadSources is off, just check

         // local repository for reporting missing source jars

         List remoteRepos = includeRemoteRepositories ? getRemoteArtifactRepositories() : Collections.EMPTY_LIST;

         for ( int j = 0; j < deps.length; j++ )

         {

             IdeDependency dependency = deps[j];

             if ( dependency.isReferencedProject() || dependency.isSystemScoped() )

             {

                 // artifact not needed

                 continue;

             }

             if ( getLog().isDebugEnabled() )

             {

                 getLog().debug(

                                 "Searching for sources for " + dependency.getId() + ":" + dependency.getClassifier() +

                                     " at " + dependency.getId() + ":" + inClassifier );

             }

             String key =

                 dependency.getClassifier() == null ? dependency.getId() + ":" + inClassifier : dependency.getId() +

                     ":" + inClassifier + ":" + dependency.getClassifier();

             if ( !unavailableArtifactsCache.containsKey( key ) )

             {

                 Artifact artifact =

                     IdeUtils.resolveArtifactWithClassifier( dependency.getGroupId(), dependency.getArtifactId(),

                                                             dependency.getVersion(), dependency.getClassifier(),

                                                             inClassifier, localRepository, artifactResolver,

                                                             artifactFactory, remoteRepos, getLog() );

                 if ( artifact.isResolved() )

                 {

                     if ( "sources".equals( inClassifier ) )

                     {

                         dependency.setSourceAttachment( artifact.getFile() );

                     }

                     else if ( "javadoc".equals( inClassifier ) )

                     {

                         dependency.setJavadocAttachment( artifact.getFile() );

                     }

                 }

                 else

                 {

                     unavailableArtifactsCache.put( key, Boolean.TRUE.toString() );

                     // add the dependencies to the list

                     // of those lacking the required

                     // artifact

                     missingClassifierDependencies.add( dependency );

                 }

             }

         }

         // return the list of dependencies missing the

         // required artifact

         return missingClassifierDependencies;

     }

     /**

      * Output a message with the list of missing dependencies and info on how turn download on if it was disabled.

      */

     private void reportMissingArtifacts()

     {

         StringBuffer msg = new StringBuffer();

         if ( !missingSourceDependencies.isEmpty() )

         {

             if ( getDownloadSources() )

             {

                 msg.append( Messages.getString( "sourcesnotavailable" ) ); //$NON-NLS-1$

             }

             else

             {

                 msg.append( Messages.getString( "sourcesnotdownloaded" ) ); //$NON-NLS-1$

             }

             for ( Iterator it = missingSourceDependencies.iterator(); it.hasNext(); )

             {

                 IdeDependency art = (IdeDependency) it.next();

                 msg.append( Messages.getString( "sourcesmissingitem", art.getId() ) ); //$NON-NLS-1$

             }

             msg.append( "\n" ); //$NON-NLS-1$

         }

         if ( !missingJavadocDependencies.isEmpty() )

         {

             if ( getDownloadJavadocs() )

             {

                 msg.append( Messages.getString( "javadocnotavailable" ) ); //$NON-NLS-1$

             }

             else

             {

                 msg.append( Messages.getString( "javadocnotdownloaded" ) ); //$NON-NLS-1$

             }

             for ( Iterator it = missingJavadocDependencies.iterator(); it.hasNext(); )

             {

                 IdeDependency art = (IdeDependency) it.next();

                 msg.append( Messages.getString( "javadocmissingitem", art.getId() ) ); //$NON-NLS-1$

             }

             msg.append( "\n" ); //$NON-NLS-1$

         }

         getLog().info( msg );

     }

     /**

      * @return List of dependencies to exclude from eclipse classpath.

      * @since 2.5

      */

     public abstract List getExcludes();

     /**

      * Checks if jar has to be resolved for the given artifact

      * 

      * @param art the artifact to check

      * @return true if resolution should happen

      */

     protected boolean hasToResolveJar( Artifact art )

     {

         return !( getUseProjectReferences() && isAvailableAsAReactorProject( art ) );

     }

     /**

      * Checks if a projects reference has to be used for the given artifact

      * 

      * @param art the artifact to check

      * @return true if a project reference has to be used.

      */

     protected boolean useProjectReference( Artifact art )

     {

         return getUseProjectReferences() && isAvailableAsAReactorProject( art );

     }

 }