src/main/java/org/apache/maven/artifact/ant/DependenciesTask.java - maven-ant-tasks - Git at Google

 package org.apache.maven.artifact.ant;

 /*
  * 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.artifact.Artifact;
 import org.apache.maven.artifact.ant.util.AntBuildWriter;
 import org.apache.maven.artifact.ant.util.AntTaskModified;
 import org.apache.maven.artifact.ant.util.AntUtil;
 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.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.filter.AndArtifactFilter;
 import org.apache.maven.artifact.resolver.filter.ArtifactFilter;
 import org.apache.maven.artifact.resolver.filter.ScopeArtifactFilter;
 import org.apache.maven.model.Dependency;
 import org.apache.maven.project.artifact.InvalidDependencyVersionException;
 import org.apache.maven.project.artifact.MavenMetadataSource;
 import org.apache.tools.ant.BuildException;
 import org.apache.tools.ant.Project;
 import org.apache.tools.ant.types.FileSet;
 import org.apache.tools.ant.types.Path;
 import org.codehaus.plexus.util.FileUtils;
 import org.codehaus.plexus.util.StringUtils;

 import java.io.File;
 import java.io.IOException;
 import java.util.Arrays;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;

 /**
  * Dependencies task, using maven-artifact.
  *
  * @author <a href="mailto:brett@apache.org">Brett Porter</a>
  * @author <a href="mailto:hboutemy@apache.org">Herve Boutemy</a>
  * @version $Id$
  */
 public class DependenciesTask
     extends AbstractArtifactWithRepositoryTask
 {
     private static final String[] SCOPES = { Artifact.SCOPE_COMPILE, Artifact.SCOPE_PROVIDED, Artifact.SCOPE_RUNTIME,
         Artifact.SCOPE_TEST, Artifact.SCOPE_SYSTEM };

     private static final Set<String> SCOPES_SET;
     static
     {
         SCOPES_SET = new HashSet<String>( Arrays.asList( SCOPES ) );
     }

     public static final String DEFAULT_ANT_BUILD_FILE = "target/build-dependencies.xml";

     private List<Dependency> dependencies = new ArrayList<Dependency>();

     /**
      * The id of the path object containing a list of all dependencies.
      */
     private String pathId;

     /**
      * The id of the fileset object containing a list of all dependencies.
      */
     private String filesetId;

     /**
      * The id of the fileset object containing all resolved source jars for the list of dependencies.
      */
     private String sourcesFilesetId;

     /**
      * The id of the fileset object containing all resolved javadoc jars for the list of dependencies.
      */
     private String javadocFilesetId;

     /**
      * The id of the object containing a list of all artifact versions.
      * This is used for things like removing the version from the dependency filenames.
      */
     private String versionsId;

     /**
      * A specific Maven scope used to determine which dependencies are resolved.
      * This takes only a single scope and uses the standard Maven ScopeArtifactFilter.
      */
     private String useScope;

     /**
      * A comma separated list of dependency scopes to include, in the resulting path and fileset.
      */
     private String scopes;

     /**
      * A comma separated list of dependency types to include in the resulting set of artifacts.
      */
     private String type;

     /**
      * The file name to use for the generated Ant build that contains dependency properties and references.
      */
     private String dependencyRefsBuildFile;

     /**
      * Whether to use a generated Ant build file to cache the list of dependency properties and references.
      */
     private boolean cacheDependencyRefs;

     /**
      * Main task execution.  Called by parent execute().
      */
     protected void doExecute()
     {

         if ( useScope != null && scopes != null )
         {
             throw new BuildException( "You cannot specify both useScope and scopes in the dependencies task." );
         }

         if ( getPom() != null && !this.dependencies.isEmpty() )
         {
             throw new BuildException( "You cannot specify both dependencies and a pom in the dependencies task" );
         }

         // Try to load dependency refs from an existing Ant cache file
         if ( isCacheDependencyRefs() )
         {
             if ( getDependencyRefsBuildFile() == null )
             {
                 setDependencyRefsBuildFile( DEFAULT_ANT_BUILD_FILE );
             }

             if ( checkCachedDependencies() )
             {
                 log( "Dependency refs loaded from file: " + getDependencyRefsBuildFile(), Project.MSG_VERBOSE );
                 return;
             }
         }

         doExecuteResolution();
     }

     protected ArtifactResolutionResult doExecuteResolution()
     {
         ArtifactRepository localRepo = createLocalArtifactRepository();
         log( "Using local repository: " + localRepo.getBasedir(), Project.MSG_VERBOSE );

         // Look up required resources from the plexus container
         ArtifactResolver resolver = (ArtifactResolver) lookup( ArtifactResolver.ROLE );
         ArtifactFactory artifactFactory = (ArtifactFactory) lookup( ArtifactFactory.ROLE );
         MavenMetadataSource metadataSource = (MavenMetadataSource) lookup( ArtifactMetadataSource.ROLE );

         Pom pom = initializePom( localRepo );
         if ( pom != null )
         {
             dependencies = pom.getDependencies();
         }
         else
         {
             // we have to have some sort of Pom object in order to satisfy the requirements for building the
             // originating Artifact below...
             pom = createDummyPom( localRepo );
         }

         if ( dependencies.isEmpty() )
         {
             log( "There were no dependencies specified", Project.MSG_WARN );
         }
         else
         {
             // check scopes
             for ( Dependency dependency : dependencies )
             {
                 String scope = dependency.getScope();

                 if ( Artifact.SCOPE_SYSTEM.equals( scope ) )
                 {
                     if ( StringUtils.isBlank( dependency.getSystemPath() ) )
                     {
                         throw new BuildException( dependency.toString()
                             + " is defined with scope='system': systemPath attribute is required." );
                     }
                 }
                 else if ( ( scope != null ) && !SCOPES_SET.contains( scope ) )
                 {
                     // see MANTTASKS-190
                     log( "Unknown scope='" + scope + "' for " + dependency + ", supported scopes are: " + SCOPES_SET,
                          Project.MSG_WARN );
                 }
             }
         }

         log( "Resolving dependencies...", Project.MSG_VERBOSE );

         ArtifactResolutionResult result;

         List<ArtifactRepository> remoteArtifactRepositories = createRemoteArtifactRepositories( pom.getRepositories() );

         try
         {
             Set<Artifact> artifacts = MavenMetadataSource.createArtifacts( artifactFactory, dependencies, null, null, null );

             Artifact pomArtifact = artifactFactory.createBuildArtifact( pom.getGroupId(), pom.getArtifactId(),
                 pom.getVersion(), pom.getPackaging() );

             List<AntResolutionListener> listeners = Collections.singletonList( new AntResolutionListener( getProject() ) );

             Map<String,Artifact> managedDependencies = pom.getMavenProject().getManagedVersionMap();

             ArtifactFilter filter = null;
             if ( useScope != null )
             {
                 filter = new ScopeArtifactFilter( useScope );
             }
             if ( scopes != null )
             {
                 filter = new SpecificScopesArtifactFilter( scopes );
             }
             if ( type != null )
             {
                 ArtifactFilter typeArtifactFilter = new TypesArtifactFilter( type );
                 if ( filter != null )
                 {
                     AndArtifactFilter andFilter = new AndArtifactFilter();
                     andFilter.add( filter );
                     andFilter.add( typeArtifactFilter );
                     filter = andFilter;
                 }
                 else
                 {
                     filter = typeArtifactFilter;
                 }
             }

             result = resolver.resolveTransitively( artifacts, pomArtifact, managedDependencies, localRepo,
                                                    remoteArtifactRepositories, metadataSource, filter, listeners );
         }
         catch ( ArtifactResolutionException e )
         {
             throw new BuildException( "Unable to resolve artifact: " + e.getMessage(), e );
         }
         catch ( ArtifactNotFoundException e )
         {
             throw new BuildException( "Dependency not found: " + e.getMessage(), e );
         }
         catch ( InvalidDependencyVersionException e )
         {
             throw new BuildException( "Invalid dependency version: " + e.getMessage(), e );
         }

         FileSet dependencyFileSet = createFileSet();

         FileSet sourcesFileSet = createFileSet();

         FileSet javadocsFileSet = createFileSet();

         Path dependencyPath = new Path( getProject() );

         Set<String> versions = new HashSet<String>();

         for ( Iterator<Artifact> i = result.getArtifacts().iterator(); i.hasNext(); )
         {
             Artifact artifact = (Artifact) i.next();

             addArtifactToResult( localRepo, artifact, dependencyFileSet, dependencyPath );

             versions.add( artifact.getVersion() );

             if ( sourcesFilesetId != null )
             {
                 resolveSource( artifactFactory, resolver, remoteArtifactRepositories, localRepo,
                                artifact, "sources", sourcesFileSet );
             }

             if ( javadocFilesetId != null )
             {
                 resolveSource( artifactFactory, resolver, remoteArtifactRepositories, localRepo,
                                artifact, "javadoc", javadocsFileSet );
             }

         }

         defineFilesetReference( filesetId, dependencyFileSet );

         defineFilesetReference( sourcesFilesetId, sourcesFileSet );

         defineFilesetReference( javadocFilesetId, javadocsFileSet );

         if ( pathId != null )
         {
             getProject().addReference( pathId, dependencyPath );
         }

         if ( versionsId != null )
         {
             String versionsValue = StringUtils.join( versions.iterator(), File.pathSeparator );
             getProject().setNewProperty( versionsId, versionsValue );
         }

         // Write the dependency information to an Ant build file.
         if ( getDependencyRefsBuildFile() != null || this.isCacheDependencyRefs() )
         {
             if ( getDependencyRefsBuildFile() == null || getDependencyRefsBuildFile().equals( "default" ) )
             {
                 setDependencyRefsBuildFile( DEFAULT_ANT_BUILD_FILE );
             }
             log( "Building ant file: " + getDependencyRefsBuildFile() );
             AntBuildWriter antBuildWriter = new AntBuildWriter();
             File antBuildFile = FileUtils.resolveFile( getProject().getBaseDir(), getDependencyRefsBuildFile() );
             try
             {
                 antBuildWriter.openAntBuild( antBuildFile, "maven-dependencies", "init-dependencies" );
                 antBuildWriter.openTarget( "init-dependencies" );
                 antBuildWriter.writeEcho( "Loading dependency paths from file: " + antBuildFile.getAbsolutePath() );

                 for ( Iterator<Artifact> i = result.getArtifacts().iterator(); i.hasNext(); )
                 {
                     Artifact artifact = i.next();
                     String conflictId = artifact.getDependencyConflictId();
                     antBuildWriter.writeProperty( conflictId, artifact.getFile().getAbsolutePath() );
                     FileSet singleArtifactFileSet = (FileSet) getProject().getReference( conflictId );
                     antBuildWriter.writeFileSet( singleArtifactFileSet, conflictId );
                 }

                 if ( pathId != null )
                 {
                     Path thePath = (Path) getProject().getReference( pathId );
                     antBuildWriter.writePath( thePath, pathId );
                 }

                 if ( filesetId != null )
                 {
                     antBuildWriter.writeFileSet( dependencyFileSet, filesetId );
                 }
                 if ( sourcesFilesetId != null )
                 {
                     antBuildWriter.writeFileSet( sourcesFileSet, sourcesFilesetId );
                 }
                 if ( javadocFilesetId != null )
                 {
                     antBuildWriter.writeFileSet( sourcesFileSet, javadocFilesetId );
                 }

                 String versionsList = getProject().getProperty( versionsId );
                 if ( versionsList != null )
                 {
                     antBuildWriter.writeProperty( versionsId, versionsList );
                 }

                 antBuildWriter.closeTarget();
                 antBuildWriter.closeAntBuild();
             }
             catch ( IOException e )
             {
                 throw new BuildException ( "Unable to write ant build: " + e);
             }
         }

         return result;
     }

     /**
      * Check if the cache needs to be updated.
      *
      * @return true if the dependency refs were successfully loaded, false otherwise
      */
     private boolean checkCachedDependencies()
     {
         File cacheBuildFile = FileUtils.resolveFile( getProject().getBaseDir(), getDependencyRefsBuildFile() );
         if ( ! cacheBuildFile.exists() )
         {
             return false;
         }

         File antBuildFile = new File( getProject().getProperty( "ant.file" ) );
         if ( antBuildFile.lastModified() > cacheBuildFile.lastModified() )
         {
             return false;
         }

         Pom pom = getPom();
         if ( pom != null )
         {
             File pomFile = pom.getFile();
             if ( pomFile == null || ( pomFile.lastModified() > cacheBuildFile.lastModified() ) )
             {
                 return false;
             }
         }

         return loadDependenciesFromAntBuildFile();
     }

     /**
      * Load the dependency references from the generated ant build file.
      *
      * @return True if the dependency refs were successfully loaded.
      */
     private boolean loadDependenciesFromAntBuildFile()
     {
         Project currentAntProject = getProject();

         // Run the ant build with the dependency refs
         AntTaskModified dependenciesAntBuild = new AntTaskModified();
         dependenciesAntBuild.setAntfile( getDependencyRefsBuildFile() );
         dependenciesAntBuild.setProject( currentAntProject );
         dependenciesAntBuild.execute();

         // Copy the properties and refs to the current project
         Project cachedDepsProject = dependenciesAntBuild.getSavedNewProject();
         AntUtil.copyProperties( cachedDepsProject, currentAntProject );
         AntUtil.copyReferences( cachedDepsProject, currentAntProject );

         return true;
     }

     private FileSet createFileSet()
     {
         FileSet fileSet = new FileSet();
         fileSet.setProject( getProject() );
         fileSet.setDir( getLocalRepository().getPath() );
         return fileSet;
     }

     private void defineFilesetReference( String id, FileSet fileSet )
     {
         if ( id != null )
         {
             if ( !fileSet.hasPatterns() )
             {
                 fileSet.createExclude().setName( "**/**" );
             }
             getProject().addReference( id, fileSet );
         }
     }

     private void addArtifactToResult( ArtifactRepository localRepo, Artifact artifact,
                                       FileSet toFileSet )
     {
         addArtifactToResult( localRepo, artifact, toFileSet, null );
     }

     private void addArtifactToResult( ArtifactRepository localRepo, Artifact artifact,
                                       FileSet toFileSet, Path path )
     {
         String filename = localRepo.pathOf( artifact );

         toFileSet.createInclude().setName( filename );

         getProject().setProperty( artifact.getDependencyConflictId(), artifact.getFile().getAbsolutePath() );

         FileSet artifactFileSet = new FileSet();
         artifactFileSet.setProject( getProject() );
         artifactFileSet.setFile( artifact.getFile() );
         getProject().addReference( artifact.getDependencyConflictId(), artifactFileSet );

         if ( path != null )
         {
             path.addFileset( artifactFileSet );
         }
     }

     private void resolveSource( ArtifactFactory artifactFactory, ArtifactResolver resolver,
                                 List<ArtifactRepository> remoteArtifactRepositories, ArtifactRepository localRepo,
                                 Artifact artifact, String classifier, FileSet sourcesFileSet )
     {
         Artifact sourceArtifact =
             artifactFactory.createArtifactWithClassifier( artifact.getGroupId(), artifact.getArtifactId(),
                                                           artifact.getVersion(), "java-source", classifier );
         try
         {
             resolver.resolve( sourceArtifact, remoteArtifactRepositories, localRepo );

             addArtifactToResult( localRepo, sourceArtifact, sourcesFileSet );
         }
         catch ( ArtifactResolutionException e )
         {
             throw new BuildException( "Unable to resolve artifact: " + e.getMessage(), e );
         }
         catch ( ArtifactNotFoundException e )
         {
             // no source available: no problem, it's optional
         }
     }

     public List<Dependency> getDependencies()
     {
         return dependencies;
     }

     public void addDependency( Dependency dependency )
     {
         dependencies.add( dependency );
     }

     public String getPathId()
     {
         return pathId;
     }

     public void setPathId( String pathId )
     {
         this.pathId = pathId;
     }

     public String getFilesetId()
     {
         return filesetId;
     }

     public void setSourcesFilesetId( String filesetId )
     {
         this.sourcesFilesetId = filesetId;
     }

     public String getSourcesFilesetId()
     {
         return sourcesFilesetId;
     }

     public void setJavadocFilesetId( String filesetId )
     {
         this.javadocFilesetId = filesetId;
     }

     public String getJavadocFilesetId()
     {
         return javadocFilesetId;
     }

     public void setFilesetId( String filesetId )
     {
         this.filesetId = filesetId;
     }

     public String getVersionsId()
     {
         return versionsId;
     }

     public void setVersionsId( String versionsId )
     {
         this.versionsId = versionsId;
     }

     public void setVerbose( boolean verbose )
     {
         getProject().log( "Option \"verbose\" is deprecated.  Please use the standard Ant -v option.",
                           Project.MSG_WARN );
     }

     /**
      * Use the Maven artifact filtering for a particular scope.  This
      * uses the standard Maven ScopeArtifactFilter.
      *
      * @param useScope
      */
     public void setUseScope( String useScope )
     {
         this.useScope = useScope;
     }

     public void setType( String type )
     {
         this.type = type;
     }

     public String getScopes()
     {
         return scopes;
     }

     /**
      * Only include artifacts that fall under one of the specified scopes.
      *
      * @return
      */
     public void setScopes( String scopes )
     {
         this.scopes = scopes;
     }

     /**
      * @deprecated
      * @param addArtifactFileSetRefs
      */
     public void setAddArtifactFileSetRefs( boolean addArtifactFileSetRefs )
     {
         this.log( "Parameter addArtifactFileSetRefs is deprecated. A fileset ref is always created " +
         		"for each dependency.", Project.MSG_WARN );
     }

     public String getDependencyRefsBuildFile()
     {
         return dependencyRefsBuildFile;
     }

     public void setDependencyRefsBuildFile( String dependencyRefsBuildFile )
     {
         this.dependencyRefsBuildFile = dependencyRefsBuildFile;
     }

     public boolean isCacheDependencyRefs()
     {
         return cacheDependencyRefs;
     }

     public void setCacheDependencyRefs( boolean cacheDependencyRefs )
     {
         this.cacheDependencyRefs = cacheDependencyRefs;
     }
 }
	package org.apache.maven.artifact.ant;

	/*
	* 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.artifact.Artifact;
	import org.apache.maven.artifact.ant.util.AntBuildWriter;
	import org.apache.maven.artifact.ant.util.AntTaskModified;
	import org.apache.maven.artifact.ant.util.AntUtil;
	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.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.filter.AndArtifactFilter;
	import org.apache.maven.artifact.resolver.filter.ArtifactFilter;
	import org.apache.maven.artifact.resolver.filter.ScopeArtifactFilter;
	import org.apache.maven.model.Dependency;
	import org.apache.maven.project.artifact.InvalidDependencyVersionException;
	import org.apache.maven.project.artifact.MavenMetadataSource;
	import org.apache.tools.ant.BuildException;
	import org.apache.tools.ant.Project;
	import org.apache.tools.ant.types.FileSet;
	import org.apache.tools.ant.types.Path;
	import org.codehaus.plexus.util.FileUtils;
	import org.codehaus.plexus.util.StringUtils;

	import java.io.File;
	import java.io.IOException;
	import java.util.Arrays;
	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.HashSet;
	import java.util.Iterator;
	import java.util.List;
	import java.util.Map;
	import java.util.Set;

	/**
	* Dependencies task, using maven-artifact.
	*
	* @author <a href="mailto:brett@apache.org">Brett Porter</a>
	* @author <a href="mailto:hboutemy@apache.org">Herve Boutemy</a>
	* @version $Id$
	*/
	public class DependenciesTask
	extends AbstractArtifactWithRepositoryTask
	{
	private static final String[] SCOPES = { Artifact.SCOPE_COMPILE, Artifact.SCOPE_PROVIDED, Artifact.SCOPE_RUNTIME,
	Artifact.SCOPE_TEST, Artifact.SCOPE_SYSTEM };

	private static final Set<String> SCOPES_SET;
	static
	{
	SCOPES_SET = new HashSet<String>( Arrays.asList( SCOPES ) );
	}

	public static final String DEFAULT_ANT_BUILD_FILE = "target/build-dependencies.xml";

	private List<Dependency> dependencies = new ArrayList<Dependency>();

	/**
	* The id of the path object containing a list of all dependencies.
	*/
	private String pathId;

	/**
	* The id of the fileset object containing a list of all dependencies.
	*/
	private String filesetId;

	/**
	* The id of the fileset object containing all resolved source jars for the list of dependencies.
	*/
	private String sourcesFilesetId;

	/**
	* The id of the fileset object containing all resolved javadoc jars for the list of dependencies.
	*/
	private String javadocFilesetId;

	/**
	* The id of the object containing a list of all artifact versions.
	* This is used for things like removing the version from the dependency filenames.
	*/
	private String versionsId;

	/**
	* A specific Maven scope used to determine which dependencies are resolved.
	* This takes only a single scope and uses the standard Maven ScopeArtifactFilter.
	*/
	private String useScope;

	/**
	* A comma separated list of dependency scopes to include, in the resulting path and fileset.
	*/
	private String scopes;

	/**
	* A comma separated list of dependency types to include in the resulting set of artifacts.
	*/
	private String type;

	/**
	* The file name to use for the generated Ant build that contains dependency properties and references.
	*/
	private String dependencyRefsBuildFile;

	/**
	* Whether to use a generated Ant build file to cache the list of dependency properties and references.
	*/
	private boolean cacheDependencyRefs;

	/**
	* Main task execution. Called by parent execute().
	*/
	protected void doExecute()
	{

	if ( useScope != null && scopes != null )
	{
	throw new BuildException( "You cannot specify both useScope and scopes in the dependencies task." );
	}

	if ( getPom() != null && !this.dependencies.isEmpty() )
	{
	throw new BuildException( "You cannot specify both dependencies and a pom in the dependencies task" );
	}

	// Try to load dependency refs from an existing Ant cache file
	if ( isCacheDependencyRefs() )
	{
	if ( getDependencyRefsBuildFile() == null )
	{
	setDependencyRefsBuildFile( DEFAULT_ANT_BUILD_FILE );
	}

	if ( checkCachedDependencies() )
	{
	log( "Dependency refs loaded from file: " + getDependencyRefsBuildFile(), Project.MSG_VERBOSE );
	return;
	}
	}

	doExecuteResolution();
	}

	protected ArtifactResolutionResult doExecuteResolution()
	{
	ArtifactRepository localRepo = createLocalArtifactRepository();
	log( "Using local repository: " + localRepo.getBasedir(), Project.MSG_VERBOSE );

	// Look up required resources from the plexus container
	ArtifactResolver resolver = (ArtifactResolver) lookup( ArtifactResolver.ROLE );
	ArtifactFactory artifactFactory = (ArtifactFactory) lookup( ArtifactFactory.ROLE );
	MavenMetadataSource metadataSource = (MavenMetadataSource) lookup( ArtifactMetadataSource.ROLE );

	Pom pom = initializePom( localRepo );
	if ( pom != null )
	{
	dependencies = pom.getDependencies();
	}
	else
	{
	// we have to have some sort of Pom object in order to satisfy the requirements for building the
	// originating Artifact below...
	pom = createDummyPom( localRepo );
	}

	if ( dependencies.isEmpty() )
	{
	log( "There were no dependencies specified", Project.MSG_WARN );
	}
	else
	{
	// check scopes
	for ( Dependency dependency : dependencies )
	{
	String scope = dependency.getScope();

	if ( Artifact.SCOPE_SYSTEM.equals( scope ) )
	{
	if ( StringUtils.isBlank( dependency.getSystemPath() ) )
	{
	throw new BuildException( dependency.toString()
	+ " is defined with scope='system': systemPath attribute is required." );
	}
	}
	else if ( ( scope != null ) && !SCOPES_SET.contains( scope ) )
	{
	// see MANTTASKS-190
	log( "Unknown scope='" + scope + "' for " + dependency + ", supported scopes are: " + SCOPES_SET,
	Project.MSG_WARN );
	}
	}
	}

	log( "Resolving dependencies...", Project.MSG_VERBOSE );

	ArtifactResolutionResult result;

	List<ArtifactRepository> remoteArtifactRepositories = createRemoteArtifactRepositories( pom.getRepositories() );

	try
	{
	Set<Artifact> artifacts = MavenMetadataSource.createArtifacts( artifactFactory, dependencies, null, null, null );

	Artifact pomArtifact = artifactFactory.createBuildArtifact( pom.getGroupId(), pom.getArtifactId(),
	pom.getVersion(), pom.getPackaging() );

	List<AntResolutionListener> listeners = Collections.singletonList( new AntResolutionListener( getProject() ) );

	Map<String,Artifact> managedDependencies = pom.getMavenProject().getManagedVersionMap();

	ArtifactFilter filter = null;
	if ( useScope != null )
	{
	filter = new ScopeArtifactFilter( useScope );
	}
	if ( scopes != null )
	{
	filter = new SpecificScopesArtifactFilter( scopes );
	}
	if ( type != null )
	{
	ArtifactFilter typeArtifactFilter = new TypesArtifactFilter( type );
	if ( filter != null )
	{
	AndArtifactFilter andFilter = new AndArtifactFilter();
	andFilter.add( filter );
	andFilter.add( typeArtifactFilter );
	filter = andFilter;
	}
	else
	{
	filter = typeArtifactFilter;
	}
	}

	result = resolver.resolveTransitively( artifacts, pomArtifact, managedDependencies, localRepo,
	remoteArtifactRepositories, metadataSource, filter, listeners );
	}
	catch ( ArtifactResolutionException e )
	{
	throw new BuildException( "Unable to resolve artifact: " + e.getMessage(), e );
	}
	catch ( ArtifactNotFoundException e )
	{
	throw new BuildException( "Dependency not found: " + e.getMessage(), e );
	}
	catch ( InvalidDependencyVersionException e )
	{
	throw new BuildException( "Invalid dependency version: " + e.getMessage(), e );
	}

	FileSet dependencyFileSet = createFileSet();

	FileSet sourcesFileSet = createFileSet();

	FileSet javadocsFileSet = createFileSet();

	Path dependencyPath = new Path( getProject() );

	Set<String> versions = new HashSet<String>();

	for ( Iterator<Artifact> i = result.getArtifacts().iterator(); i.hasNext(); )
	{
	Artifact artifact = (Artifact) i.next();

	addArtifactToResult( localRepo, artifact, dependencyFileSet, dependencyPath );

	versions.add( artifact.getVersion() );

	if ( sourcesFilesetId != null )
	{
	resolveSource( artifactFactory, resolver, remoteArtifactRepositories, localRepo,
	artifact, "sources", sourcesFileSet );
	}

	if ( javadocFilesetId != null )
	{
	resolveSource( artifactFactory, resolver, remoteArtifactRepositories, localRepo,
	artifact, "javadoc", javadocsFileSet );
	}

	}

	defineFilesetReference( filesetId, dependencyFileSet );

	defineFilesetReference( sourcesFilesetId, sourcesFileSet );

	defineFilesetReference( javadocFilesetId, javadocsFileSet );

	if ( pathId != null )
	{
	getProject().addReference( pathId, dependencyPath );
	}

	if ( versionsId != null )
	{
	String versionsValue = StringUtils.join( versions.iterator(), File.pathSeparator );
	getProject().setNewProperty( versionsId, versionsValue );
	}

	// Write the dependency information to an Ant build file.
	if ( getDependencyRefsBuildFile() != null \|\| this.isCacheDependencyRefs() )
	{
	if ( getDependencyRefsBuildFile() == null \|\| getDependencyRefsBuildFile().equals( "default" ) )
	{
	setDependencyRefsBuildFile( DEFAULT_ANT_BUILD_FILE );
	}
	log( "Building ant file: " + getDependencyRefsBuildFile() );
	AntBuildWriter antBuildWriter = new AntBuildWriter();
	File antBuildFile = FileUtils.resolveFile( getProject().getBaseDir(), getDependencyRefsBuildFile() );
	try
	{
	antBuildWriter.openAntBuild( antBuildFile, "maven-dependencies", "init-dependencies" );
	antBuildWriter.openTarget( "init-dependencies" );
	antBuildWriter.writeEcho( "Loading dependency paths from file: " + antBuildFile.getAbsolutePath() );

	for ( Iterator<Artifact> i = result.getArtifacts().iterator(); i.hasNext(); )
	{
	Artifact artifact = i.next();
	String conflictId = artifact.getDependencyConflictId();
	antBuildWriter.writeProperty( conflictId, artifact.getFile().getAbsolutePath() );
	FileSet singleArtifactFileSet = (FileSet) getProject().getReference( conflictId );
	antBuildWriter.writeFileSet( singleArtifactFileSet, conflictId );
	}

	if ( pathId != null )
	{
	Path thePath = (Path) getProject().getReference( pathId );
	antBuildWriter.writePath( thePath, pathId );
	}

	if ( filesetId != null )
	{
	antBuildWriter.writeFileSet( dependencyFileSet, filesetId );
	}
	if ( sourcesFilesetId != null )
	{
	antBuildWriter.writeFileSet( sourcesFileSet, sourcesFilesetId );
	}
	if ( javadocFilesetId != null )
	{
	antBuildWriter.writeFileSet( sourcesFileSet, javadocFilesetId );
	}

	String versionsList = getProject().getProperty( versionsId );
	if ( versionsList != null )
	{
	antBuildWriter.writeProperty( versionsId, versionsList );
	}

	antBuildWriter.closeTarget();
	antBuildWriter.closeAntBuild();
	}
	catch ( IOException e )
	{
	throw new BuildException ( "Unable to write ant build: " + e);
	}
	}

	return result;
	}

	/**
	* Check if the cache needs to be updated.
	*
	* @return true if the dependency refs were successfully loaded, false otherwise
	*/
	private boolean checkCachedDependencies()
	{
	File cacheBuildFile = FileUtils.resolveFile( getProject().getBaseDir(), getDependencyRefsBuildFile() );
	if ( ! cacheBuildFile.exists() )
	{
	return false;
	}

	File antBuildFile = new File( getProject().getProperty( "ant.file" ) );
	if ( antBuildFile.lastModified() > cacheBuildFile.lastModified() )
	{
	return false;
	}

	Pom pom = getPom();
	if ( pom != null )
	{
	File pomFile = pom.getFile();
	if ( pomFile == null \|\| ( pomFile.lastModified() > cacheBuildFile.lastModified() ) )
	{
	return false;
	}
	}

	return loadDependenciesFromAntBuildFile();
	}

	/**
	* Load the dependency references from the generated ant build file.
	*
	* @return True if the dependency refs were successfully loaded.
	*/
	private boolean loadDependenciesFromAntBuildFile()
	{
	Project currentAntProject = getProject();

	// Run the ant build with the dependency refs
	AntTaskModified dependenciesAntBuild = new AntTaskModified();
	dependenciesAntBuild.setAntfile( getDependencyRefsBuildFile() );
	dependenciesAntBuild.setProject( currentAntProject );
	dependenciesAntBuild.execute();

	// Copy the properties and refs to the current project
	Project cachedDepsProject = dependenciesAntBuild.getSavedNewProject();
	AntUtil.copyProperties( cachedDepsProject, currentAntProject );
	AntUtil.copyReferences( cachedDepsProject, currentAntProject );

	return true;
	}

	private FileSet createFileSet()
	{
	FileSet fileSet = new FileSet();
	fileSet.setProject( getProject() );
	fileSet.setDir( getLocalRepository().getPath() );
	return fileSet;
	}

	private void defineFilesetReference( String id, FileSet fileSet )
	{
	if ( id != null )
	{
	if ( !fileSet.hasPatterns() )
	{
	fileSet.createExclude().setName( "/" );
	}
	getProject().addReference( id, fileSet );
	}
	}

	private void addArtifactToResult( ArtifactRepository localRepo, Artifact artifact,
	FileSet toFileSet )
	{
	addArtifactToResult( localRepo, artifact, toFileSet, null );
	}

	private void addArtifactToResult( ArtifactRepository localRepo, Artifact artifact,
	FileSet toFileSet, Path path )
	{
	String filename = localRepo.pathOf( artifact );

	toFileSet.createInclude().setName( filename );

	getProject().setProperty( artifact.getDependencyConflictId(), artifact.getFile().getAbsolutePath() );

	FileSet artifactFileSet = new FileSet();
	artifactFileSet.setProject( getProject() );
	artifactFileSet.setFile( artifact.getFile() );
	getProject().addReference( artifact.getDependencyConflictId(), artifactFileSet );

	if ( path != null )
	{
	path.addFileset( artifactFileSet );
	}
	}

	private void resolveSource( ArtifactFactory artifactFactory, ArtifactResolver resolver,
	List<ArtifactRepository> remoteArtifactRepositories, ArtifactRepository localRepo,
	Artifact artifact, String classifier, FileSet sourcesFileSet )
	{
	Artifact sourceArtifact =
	artifactFactory.createArtifactWithClassifier( artifact.getGroupId(), artifact.getArtifactId(),
	artifact.getVersion(), "java-source", classifier );
	try
	{
	resolver.resolve( sourceArtifact, remoteArtifactRepositories, localRepo );

	addArtifactToResult( localRepo, sourceArtifact, sourcesFileSet );
	}
	catch ( ArtifactResolutionException e )
	{
	throw new BuildException( "Unable to resolve artifact: " + e.getMessage(), e );
	}
	catch ( ArtifactNotFoundException e )
	{
	// no source available: no problem, it's optional
	}
	}

	public List<Dependency> getDependencies()
	{
	return dependencies;
	}

	public void addDependency( Dependency dependency )
	{
	dependencies.add( dependency );
	}

	public String getPathId()
	{
	return pathId;
	}

	public void setPathId( String pathId )
	{
	this.pathId = pathId;
	}

	public String getFilesetId()
	{
	return filesetId;
	}

	public void setSourcesFilesetId( String filesetId )
	{
	this.sourcesFilesetId = filesetId;
	}

	public String getSourcesFilesetId()
	{
	return sourcesFilesetId;
	}

	public void setJavadocFilesetId( String filesetId )
	{
	this.javadocFilesetId = filesetId;
	}

	public String getJavadocFilesetId()
	{
	return javadocFilesetId;
	}

	public void setFilesetId( String filesetId )
	{
	this.filesetId = filesetId;
	}

	public String getVersionsId()
	{
	return versionsId;
	}

	public void setVersionsId( String versionsId )
	{
	this.versionsId = versionsId;
	}

	public void setVerbose( boolean verbose )
	{
	getProject().log( "Option \"verbose\" is deprecated. Please use the standard Ant -v option.",
	Project.MSG_WARN );
	}

	/**
	* Use the Maven artifact filtering for a particular scope. This
	* uses the standard Maven ScopeArtifactFilter.
	*
	* @param useScope
	*/
	public void setUseScope( String useScope )
	{
	this.useScope = useScope;
	}

	public void setType( String type )
	{
	this.type = type;
	}

	public String getScopes()
	{
	return scopes;
	}

	/**
	* Only include artifacts that fall under one of the specified scopes.
	*
	* @return
	*/
	public void setScopes( String scopes )
	{
	this.scopes = scopes;
	}

	/**
	* @deprecated
	* @param addArtifactFileSetRefs
	*/
	public void setAddArtifactFileSetRefs( boolean addArtifactFileSetRefs )
	{
	this.log( "Parameter addArtifactFileSetRefs is deprecated. A fileset ref is always created " +
	"for each dependency.", Project.MSG_WARN );
	}

	public String getDependencyRefsBuildFile()
	{
	return dependencyRefsBuildFile;
	}

	public void setDependencyRefsBuildFile( String dependencyRefsBuildFile )
	{
	this.dependencyRefsBuildFile = dependencyRefsBuildFile;
	}

	public boolean isCacheDependencyRefs()
	{
	return cacheDependencyRefs;
	}

	public void setCacheDependencyRefs( boolean cacheDependencyRefs )
	{
	this.cacheDependencyRefs = cacheDependencyRefs;
	}
	}