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1 package org.apache.archiva.converter.artifact;
2
3 /*
4  * Licensed to the Apache Software Foundation (ASF) under one
5  * or more contributor license agreements.  See the NOTICE file
6  * distributed with this work for additional information
7  * regarding copyright ownership.  The ASF licenses this file
8  * to you under the Apache License, Version 2.0 (the
9  * "License"); you may not use this file except in compliance
10  * with the License.  You may obtain a copy of the License at
11  *
12  *  http://www.apache.org/licenses/LICENSE-2.0
13  *
14  * Unless required by applicable law or agreed to in writing,
15  * software distributed under the License is distributed on an
16  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17  * KIND, either express or implied.  See the License for the
18  * specific language governing permissions and limitations
19  * under the License.
20  */
21
22 import org.apache.archiva.common.plexusbridge.DigesterUtils;
23 import org.apache.archiva.common.plexusbridge.PlexusSisuBridge;
24 import org.apache.archiva.common.plexusbridge.PlexusSisuBridgeException;
25 import org.apache.archiva.transaction.FileTransaction;
26 import org.apache.archiva.transaction.TransactionException;
27 import org.apache.commons.io.FileUtils;
28 import org.apache.commons.io.IOUtils;
29 import org.apache.maven.artifact.Artifact;
30 import org.apache.maven.artifact.factory.ArtifactFactory;
31 import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
32 import org.apache.maven.artifact.repository.ArtifactRepository;
33 import org.apache.maven.artifact.repository.metadata.ArtifactRepositoryMetadata;
34 import org.apache.maven.artifact.repository.metadata.Metadata;
35 import org.apache.maven.artifact.repository.metadata.RepositoryMetadata;
36 import org.apache.maven.artifact.repository.metadata.Snapshot;
37 import org.apache.maven.artifact.repository.metadata.SnapshotArtifactRepositoryMetadata;
38 import org.apache.maven.artifact.repository.metadata.Versioning;
39 import org.apache.maven.artifact.repository.metadata.io.xpp3.MetadataXpp3Reader;
40 import org.apache.maven.artifact.repository.metadata.io.xpp3.MetadataXpp3Writer;
41 import org.apache.maven.model.DistributionManagement;
42 import org.apache.maven.model.Model;
43 import org.apache.maven.model.Relocation;
44 import org.apache.maven.model.converter.ModelConverter;
45 import org.apache.maven.model.converter.PomTranslationException;
46 import org.apache.maven.model.io.xpp3.MavenXpp3Writer;
47 import org.codehaus.plexus.digest.Digester;
48 import org.codehaus.plexus.digest.DigesterException;
49 import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
50 import org.springframework.stereotype.Service;
51
52 import javax.annotation.PostConstruct;
53 import javax.inject.Inject;
54 import java.io.File;
55 import java.io.FileNotFoundException;
56 import java.io.FileReader;
57 import java.io.IOException;
58 import java.io.StringReader;
59 import java.io.StringWriter;
60 import java.nio.charset.Charset;
61 import java.util.ArrayList;
62 import java.util.HashMap;
63 import java.util.List;
64 import java.util.Map;
65 import java.util.Properties;
66 import java.util.regex.Matcher;
67
68 /**
69  * LegacyToDefaultConverter
70  */
71 @Service ("artifactConverter#legacy-to-default")
72 public class LegacyToDefaultConverter
73     implements ArtifactConverter
74 {
75     /**
76      * {@link List}<{@link Digester}
77      */
78     private List<? extends Digester> digesters;
79
80     @Inject
81     private PlexusSisuBridge plexusSisuBridge;
82
83     @Inject
84     private DigesterUtils digesterUtils;
85
86     /**
87      *
88      */
89     private ModelConverter translator;
90
91     /**
92      *
93      */
94     private ArtifactFactory artifactFactory;
95
96     /**
97      *
98      */
99     private ArtifactHandlerManager artifactHandlerManager;
100
101     /**
102      * default-value="false"
103      */
104     private boolean force;
105
106     /**
107      * default-value="false"
108      */
109     private boolean dryrun;
110
111     private Map<Artifact, List<String>> warnings = new HashMap<Artifact, List<String>>();
112
113     @PostConstruct
114     public void initialize()
115         throws PlexusSisuBridgeException
116     {
117         this.digesters = digesterUtils.getAllDigesters();
118         translator = plexusSisuBridge.lookup( ModelConverter.class );
119         artifactFactory = plexusSisuBridge.lookup( ArtifactFactory.class );
120         artifactHandlerManager = plexusSisuBridge.lookup( ArtifactHandlerManager.class );
121     }
122
123     public void convert( Artifact artifact, ArtifactRepository targetRepository )
124         throws ArtifactConversionException
125     {
126         if ( artifact.getRepository().getUrl().equals( targetRepository.getUrl() ) )
127         {
128             throw new ArtifactConversionException( Messages.getString( "exception.repositories.match" ) ); //$NON-NLS-1$
129         }
130
131         if ( !validateMetadata( artifact ) )
132         {
133             addWarning( artifact, Messages.getString( "unable.to.validate.metadata" ) ); //$NON-NLS-1$
134             return;
135         }
136
137         FileTransaction transaction = new FileTransaction();
138
139         if ( !copyPom( artifact, targetRepository, transaction ) )
140         {
141             addWarning( artifact, Messages.getString( "unable.to.copy.pom" ) ); //$NON-NLS-1$
142             return;
143         }
144
145         if ( !copyArtifact( artifact, targetRepository, transaction ) )
146         {
147             addWarning( artifact, Messages.getString( "unable.to.copy.artifact" ) ); //$NON-NLS-1$
148             return;
149         }
150
151         Metadata metadata = createBaseMetadata( artifact );
152         Versioning versioning = new Versioning();
153         versioning.addVersion( artifact.getBaseVersion() );
154         metadata.setVersioning( versioning );
155         updateMetadata( new ArtifactRepositoryMetadata( artifact ), targetRepository, metadata, transaction );
156
157         metadata = createBaseMetadata( artifact );
158         metadata.setVersion( artifact.getBaseVersion() );
159         versioning = new Versioning();
160
161         Matcher matcher = Artifact.VERSION_FILE_PATTERN.matcher( artifact.getVersion() );
162         if ( matcher.matches() )
163         {
164             Snapshot snapshot = new Snapshot();
165             snapshot.setBuildNumber( Integer.parseInt( matcher.group( 3 ) ) );
166             snapshot.setTimestamp( matcher.group( 2 ) );
167             versioning.setSnapshot( snapshot );
168         }
169
170         // TODO: merge latest/release/snapshot from source instead
171         metadata.setVersioning( versioning );
172         updateMetadata( new SnapshotArtifactRepositoryMetadata( artifact ), targetRepository, metadata, transaction );
173
174         if ( !dryrun )
175         {
176             try
177             {
178                 transaction.commit();
179             }
180             catch ( TransactionException e )
181             {
182                 throw new ArtifactConversionException( Messages.getString( "transaction.failure", e.getMessage() ),
183                                                        e ); //$NON-NLS-1$
184             }
185         }
186     }
187
188     @SuppressWarnings ("unchecked")
189     private boolean copyPom( Artifact artifact, ArtifactRepository targetRepository, FileTransaction transaction )
190         throws ArtifactConversionException
191     {
192         Artifact pom = artifactFactory.createProjectArtifact( artifact.getGroupId(), artifact.getArtifactId(),
193                                                               artifact.getVersion() );
194         pom.setBaseVersion( artifact.getBaseVersion() );
195         ArtifactRepository repository = artifact.getRepository();
196         File file = new File( repository.getBasedir(), repository.pathOf( pom ) );
197
198         boolean result = true;
199         if ( file.exists() )
200         {
201             File targetFile = new File( targetRepository.getBasedir(), targetRepository.pathOf( pom ) );
202
203             String contents = null;
204             boolean checksumsValid = false;
205             try
206             {
207                 if ( testChecksums( artifact, file ) )
208                 {
209                     checksumsValid = true;
210                 }
211
212                 // Even if the checksums for the POM are invalid we should still convert the POM
213                 contents = FileUtils.readFileToString( file, Charset.defaultCharset() );
214             }
215             catch ( IOException e )
216             {
217                 throw new ArtifactConversionException(
218                     Messages.getString( "unable.to.read.source.pom", e.getMessage() ), e ); //$NON-NLS-1$
219             }
220
221             if ( checksumsValid && contents.indexOf( "modelVersion" ) >= 0 ) //$NON-NLS-1$
222             {
223                 // v4 POM
224                 try
225                 {
226                     boolean matching = false;
227                     if ( !force && targetFile.exists() )
228                     {
229                         String targetContents = FileUtils.readFileToString( targetFile, Charset.defaultCharset() );
230                         matching = targetContents.equals( contents );
231                     }
232                     if ( force || !matching )
233                     {
234                         transaction.createFile( contents, targetFile, digesters );
235                     }
236                 }
237                 catch ( IOException e )
238                 {
239                     throw new ArtifactConversionException(
240                         Messages.getString( "unable.to.write.target.pom", e.getMessage() ), e ); //$NON-NLS-1$
241                 }
242             }
243             else
244             {
245                 // v3 POM
246                 StringReader stringReader = new StringReader( contents );
247                 StringWriter writer = null;
248                 try
249                 {
250                     org.apache.maven.model.v3_0_0.io.xpp3.MavenXpp3Reader v3Reader =
251                         new org.apache.maven.model.v3_0_0.io.xpp3.MavenXpp3Reader();
252                     org.apache.maven.model.v3_0_0.Model v3Model = v3Reader.read( stringReader );
253
254                     if ( doRelocation( artifact, v3Model, targetRepository, transaction ) )
255                     {
256                         Artifact relocatedPom =
257                             artifactFactory.createProjectArtifact( artifact.getGroupId(), artifact.getArtifactId(),
258                                                                    artifact.getVersion() );
259                         targetFile = new File( targetRepository.getBasedir(), targetRepository.pathOf( relocatedPom ) );
260                     }
261
262                     Model v4Model = translator.translate( v3Model );
263
264                     translator.validateV4Basics( v4Model, v3Model.getGroupId(), v3Model.getArtifactId(),
265                                                  v3Model.getVersion(), v3Model.getPackage() );
266
267                     writer = new StringWriter();
268                     MavenXpp3Writer Xpp3Writer = new MavenXpp3Writer();
269                     Xpp3Writer.write( writer, v4Model );
270
271                     transaction.createFile( writer.toString(), targetFile, digesters );
272
273                     List<String> warnings = translator.getWarnings();
274
275                     for ( String message : warnings )
276                     {
277                         addWarning( artifact, message );
278                     }
279                 }
280                 catch ( XmlPullParserException e )
281                 {
282                     addWarning( artifact, Messages.getString( "invalid.source.pom", e.getMessage() ) ); //$NON-NLS-1$
283                     result = false;
284                 }
285                 catch ( IOException e )
286                 {
287                     throw new ArtifactConversionException( Messages.getString( "unable.to.write.converted.pom" ),
288                                                            e ); //$NON-NLS-1$
289                 }
290                 catch ( PomTranslationException e )
291                 {
292                     addWarning( artifact, Messages.getString( "invalid.source.pom", e.getMessage() ) ); //$NON-NLS-1$
293                     result = false;
294                 }
295                 finally
296                 {
297                     IOUtils.closeQuietly( writer );
298                 }
299             }
300         }
301         else
302         {
303             addWarning( artifact, Messages.getString( "warning.missing.pom" ) ); //$NON-NLS-1$
304         }
305         return result;
306     }
307
308     private boolean testChecksums( Artifact artifact, File file )
309         throws IOException
310     {
311         boolean result = true;
312         for ( Digester digester : digesters )
313         {
314             result &= verifyChecksum( file, file.getName() + "." + getDigesterFileExtension( digester ), digester,
315                                       //$NON-NLS-1$
316                                       artifact,
317                                       "failure.incorrect." + getDigesterFileExtension( digester ) ); //$NON-NLS-1$
318         }
319         return result;
320     }
321
322     private boolean verifyChecksum( File file, String fileName, Digester digester, Artifact artifact, String key )
323         throws IOException
324     {
325         boolean result = true;
326
327         File checksumFile = new File( file.getParentFile(), fileName );
328         if ( checksumFile.exists() )
329         {
330             String checksum = FileUtils.readFileToString( checksumFile, Charset.defaultCharset() );
331             try
332             {
333                 digester.verify( file, checksum );
334             }
335             catch ( DigesterException e )
336             {
337                 addWarning( artifact, Messages.getString( key ) );
338                 result = false;
339             }
340         }
341         return result;
342     }
343
344     /**
345      * File extension for checksums
346      * TODO should be moved to plexus-digester ?
347      */
348     private String getDigesterFileExtension( Digester digester )
349     {
350         return digester.getAlgorithm().toLowerCase().replaceAll( "-", "" ); //$NON-NLS-1$ //$NON-NLS-2$
351     }
352
353     private boolean copyArtifact( Artifact artifact, ArtifactRepository targetRepository, FileTransaction transaction )
354         throws ArtifactConversionException
355     {
356         File sourceFile = artifact.getFile();
357
358         if ( sourceFile.getAbsolutePath().indexOf( "/plugins/" ) > -1 ) //$NON-NLS-1$
359         {
360             artifact.setArtifactHandler( artifactHandlerManager.getArtifactHandler( "maven-plugin" ) ); //$NON-NLS-1$
361         }
362
363         File targetFile = new File( targetRepository.getBasedir(), targetRepository.pathOf( artifact ) );
364
365         boolean result = true;
366         try
367         {
368             boolean matching = false;
369             if ( !force && targetFile.exists() )
370             {
371                 matching = FileUtils.contentEquals( sourceFile, targetFile );
372                 if ( !matching )
373                 {
374                     addWarning( artifact, Messages.getString( "failure.target.already.exists" ) ); //$NON-NLS-1$
375                     result = false;
376                 }
377             }
378             if ( result )
379             {
380                 if ( force || !matching )
381                 {
382                     if ( testChecksums( artifact, sourceFile ) )
383                     {
384                         transaction.copyFile( sourceFile, targetFile, digesters );
385                     }
386                     else
387                     {
388                         result = false;
389                     }
390                 }
391             }
392         }
393         catch ( IOException e )
394         {
395             throw new ArtifactConversionException( Messages.getString( "error.copying.artifact" ), e ); //$NON-NLS-1$
396         }
397         return result;
398     }
399
400     private Metadata createBaseMetadata( Artifact artifact )
401     {
402         Metadata metadata = new Metadata();
403         metadata.setArtifactId( artifact.getArtifactId() );
404         metadata.setGroupId( artifact.getGroupId() );
405         return metadata;
406     }
407
408     private Metadata readMetadata( File file )
409         throws ArtifactConversionException
410     {
411         Metadata metadata;
412         MetadataXpp3Reader reader = new MetadataXpp3Reader();
413         FileReader fileReader = null;
414         try
415         {
416             fileReader = new FileReader( file );
417             metadata = reader.read( fileReader );
418         }
419         catch ( FileNotFoundException e )
420         {
421             throw new ArtifactConversionException( Messages.getString( "error.reading.target.metadata" ),
422                                                    e ); //$NON-NLS-1$
423         }
424         catch ( IOException e )
425         {
426             throw new ArtifactConversionException( Messages.getString( "error.reading.target.metadata" ),
427                                                    e ); //$NON-NLS-1$
428         }
429         catch ( XmlPullParserException e )
430         {
431             throw new ArtifactConversionException( Messages.getString( "error.reading.target.metadata" ),
432                                                    e ); //$NON-NLS-1$
433         }
434         finally
435         {
436             IOUtils.closeQuietly( fileReader );
437         }
438         return metadata;
439     }
440
441     private boolean validateMetadata( Artifact artifact )
442         throws ArtifactConversionException
443     {
444         ArtifactRepository repository = artifact.getRepository();
445
446         boolean result = true;
447
448         RepositoryMetadata repositoryMetadata = new ArtifactRepositoryMetadata( artifact );
449         File file =
450             new File( repository.getBasedir(), repository.pathOfRemoteRepositoryMetadata( repositoryMetadata ) );
451         if ( file.exists() )
452         {
453             Metadata metadata = readMetadata( file );
454             result = validateMetadata( metadata, repositoryMetadata, artifact );
455         }
456
457         repositoryMetadata = new SnapshotArtifactRepositoryMetadata( artifact );
458         file = new File( repository.getBasedir(), repository.pathOfRemoteRepositoryMetadata( repositoryMetadata ) );
459         if ( file.exists() )
460         {
461             Metadata metadata = readMetadata( file );
462             result = result && validateMetadata( metadata, repositoryMetadata, artifact );
463         }
464
465         return result;
466     }
467
468     @SuppressWarnings ("unchecked")
469     private boolean validateMetadata( Metadata metadata, RepositoryMetadata repositoryMetadata, Artifact artifact )
470     {
471         String groupIdKey;
472         String artifactIdKey = null;
473         String snapshotKey = null;
474         String versionKey = null;
475         String versionsKey = null;
476
477         if ( repositoryMetadata.storedInGroupDirectory() )
478         {
479             groupIdKey = "failure.incorrect.groupMetadata.groupId"; //$NON-NLS-1$
480         }
481         else if ( repositoryMetadata.storedInArtifactVersionDirectory() )
482         {
483             groupIdKey = "failure.incorrect.snapshotMetadata.groupId"; //$NON-NLS-1$
484             artifactIdKey = "failure.incorrect.snapshotMetadata.artifactId"; //$NON-NLS-1$
485             versionKey = "failure.incorrect.snapshotMetadata.version"; //$NON-NLS-1$
486             snapshotKey = "failure.incorrect.snapshotMetadata.snapshot"; //$NON-NLS-1$
487         }
488         else
489         {
490             groupIdKey = "failure.incorrect.artifactMetadata.groupId"; //$NON-NLS-1$
491             artifactIdKey = "failure.incorrect.artifactMetadata.artifactId"; //$NON-NLS-1$
492             versionsKey = "failure.incorrect.artifactMetadata.versions"; //$NON-NLS-1$
493         }
494
495         boolean result = true;
496
497         if ( metadata.getGroupId() == null || !metadata.getGroupId().equals( artifact.getGroupId() ) )
498         {
499             addWarning( artifact, Messages.getString( groupIdKey ) );
500             result = false;
501         }
502         if ( !repositoryMetadata.storedInGroupDirectory() )
503         {
504             if ( metadata.getGroupId() == null || !metadata.getArtifactId().equals( artifact.getArtifactId() ) )
505             {
506                 addWarning( artifact, Messages.getString( artifactIdKey ) );
507                 result = false;
508             }
509             if ( !repositoryMetadata.storedInArtifactVersionDirectory() )
510             {
511                 // artifact metadata
512
513                 boolean foundVersion = false;
514                 if ( metadata.getVersioning() != null )
515                 {
516                     for ( String version : (List<String>) metadata.getVersioning().getVersions() )
517                     {
518                         if ( version.equals( artifact.getBaseVersion() ) )
519                         {
520                             foundVersion = true;
521                             break;
522                         }
523                     }
524                 }
525
526                 if ( !foundVersion )
527                 {
528                     addWarning( artifact, Messages.getString( versionsKey ) );
529                     result = false;
530                 }
531             }
532             else
533             {
534                 // snapshot metadata
535                 if ( !artifact.getBaseVersion().equals( metadata.getVersion() ) )
536                 {
537                     addWarning( artifact, Messages.getString( versionKey ) );
538                     result = false;
539                 }
540
541                 if ( artifact.isSnapshot() )
542                 {
543                     Matcher matcher = Artifact.VERSION_FILE_PATTERN.matcher( artifact.getVersion() );
544                     if ( matcher.matches() )
545                     {
546                         boolean correct = false;
547                         if ( metadata.getVersioning() != null && metadata.getVersioning().getSnapshot() != null )
548                         {
549                             Snapshot snapshot = metadata.getVersioning().getSnapshot();
550                             int build = Integer.parseInt( matcher.group( 3 ) );
551                             String ts = matcher.group( 2 );
552                             if ( build == snapshot.getBuildNumber() && ts.equals( snapshot.getTimestamp() ) )
553                             {
554                                 correct = true;
555                             }
556                         }
557
558                         if ( !correct )
559                         {
560                             addWarning( artifact, Messages.getString( snapshotKey ) );
561                             result = false;
562                         }
563                     }
564                 }
565             }
566         }
567         return result;
568     }
569
570     private void updateMetadata( RepositoryMetadata artifactMetadata, ArtifactRepository targetRepository,
571                                  Metadata newMetadata, FileTransaction transaction )
572         throws ArtifactConversionException
573     {
574         File file = new File( targetRepository.getBasedir(),
575                               targetRepository.pathOfRemoteRepositoryMetadata( artifactMetadata ) );
576
577         Metadata metadata;
578         boolean changed;
579
580         if ( file.exists() )
581         {
582             metadata = readMetadata( file );
583             changed = metadata.merge( newMetadata );
584         }
585         else
586         {
587             changed = true;
588             metadata = newMetadata;
589         }
590
591         if ( changed )
592         {
593             StringWriter writer = null;
594             try
595             {
596                 writer = new StringWriter();
597
598                 MetadataXpp3Writer mappingWriter = new MetadataXpp3Writer();
599
600                 mappingWriter.write( writer, metadata );
601
602                 transaction.createFile( writer.toString(), file, digesters );
603             }
604             catch ( IOException e )
605             {
606                 throw new ArtifactConversionException( Messages.getString( "error.writing.target.metadata" ),
607                                                        e ); //$NON-NLS-1$
608             }
609             finally
610             {
611                 IOUtils.closeQuietly( writer );
612             }
613         }
614     }
615
616     private boolean doRelocation( Artifact artifact, org.apache.maven.model.v3_0_0.Model v3Model,
617                                   ArtifactRepository repository, FileTransaction transaction )
618         throws IOException
619     {
620         Properties properties = v3Model.getProperties();
621         if ( properties.containsKey( "relocated.groupId" ) || properties.containsKey( "relocated.artifactId" )
622             //$NON-NLS-1$ //$NON-NLS-2$
623             || properties.containsKey( "relocated.version" ) ) //$NON-NLS-1$
624         {
625             String newGroupId = properties.getProperty( "relocated.groupId", v3Model.getGroupId() ); //$NON-NLS-1$
626             properties.remove( "relocated.groupId" ); //$NON-NLS-1$
627
628             String newArtifactId =
629                 properties.getProperty( "relocated.artifactId", v3Model.getArtifactId() ); //$NON-NLS-1$
630             properties.remove( "relocated.artifactId" ); //$NON-NLS-1$
631
632             String newVersion = properties.getProperty( "relocated.version", v3Model.getVersion() ); //$NON-NLS-1$
633             properties.remove( "relocated.version" ); //$NON-NLS-1$
634
635             String message = properties.getProperty( "relocated.message", "" ); //$NON-NLS-1$ //$NON-NLS-2$
636             properties.remove( "relocated.message" ); //$NON-NLS-1$
637
638             if ( properties.isEmpty() )
639             {
640                 v3Model.setProperties( null );
641             }
642
643             writeRelocationPom( v3Model.getGroupId(), v3Model.getArtifactId(), v3Model.getVersion(), newGroupId,
644                                 newArtifactId, newVersion, message, repository, transaction );
645
646             v3Model.setGroupId( newGroupId );
647             v3Model.setArtifactId( newArtifactId );
648             v3Model.setVersion( newVersion );
649
650             artifact.setGroupId( newGroupId );
651             artifact.setArtifactId( newArtifactId );
652             artifact.setVersion( newVersion );
653
654             return true;
655         }
656         else
657         {
658             return false;
659         }
660     }
661
662     private void writeRelocationPom( String groupId, String artifactId, String version, String newGroupId,
663                                      String newArtifactId, String newVersion, String message,
664                                      ArtifactRepository repository, FileTransaction transaction )
665         throws IOException
666     {
667         Model pom = new Model();
668         pom.setGroupId( groupId );
669         pom.setArtifactId( artifactId );
670         pom.setVersion( version );
671
672         DistributionManagement dMngt = new DistributionManagement();
673
674         Relocation relocation = new Relocation();
675         relocation.setGroupId( newGroupId );
676         relocation.setArtifactId( newArtifactId );
677         relocation.setVersion( newVersion );
678         if ( message != null && message.length() > 0 )
679         {
680             relocation.setMessage( message );
681         }
682
683         dMngt.setRelocation( relocation );
684
685         pom.setDistributionManagement( dMngt );
686
687         Artifact artifact = artifactFactory.createBuildArtifact( groupId, artifactId, version, "pom" ); //$NON-NLS-1$
688         File pomFile = new File( repository.getBasedir(), repository.pathOf( artifact ) );
689
690         StringWriter strWriter = new StringWriter();
691         MavenXpp3Writer pomWriter = new MavenXpp3Writer();
692         pomWriter.write( strWriter, pom );
693
694         transaction.createFile( strWriter.toString(), pomFile, digesters );
695     }
696
697     private void addWarning( Artifact artifact, String message )
698     {
699         List<String> messages = warnings.get( artifact );
700         if ( messages == null )
701         {
702             messages = new ArrayList<String>( 1 );
703         }
704         messages.add( message );
705         warnings.put( artifact, messages );
706     }
707
708     public void clearWarnings()
709     {
710         warnings.clear();
711     }
712
713     public Map<Artifact, List<String>> getWarnings()
714     {
715         return warnings;
716     }
717
718
719     public List<? extends Digester> getDigesters()
720     {
721         return digesters;
722     }
723
724     public void setDigesters( List<Digester> digesters )
725     {
726         this.digesters = digesters;
727     }
728
729     public ModelConverter getTranslator()
730     {
731         return translator;
732     }
733
734     public void setTranslator( ModelConverter translator )
735     {
736         this.translator = translator;
737     }
738
739     public ArtifactFactory getArtifactFactory()
740     {
741         return artifactFactory;
742     }
743
744     public void setArtifactFactory( ArtifactFactory artifactFactory )
745     {
746         this.artifactFactory = artifactFactory;
747     }
748
749     public ArtifactHandlerManager getArtifactHandlerManager()
750     {
751         return artifactHandlerManager;
752     }
753
754     public void setArtifactHandlerManager( ArtifactHandlerManager artifactHandlerManager )
755     {
756         this.artifactHandlerManager = artifactHandlerManager;
757     }
758
759     public boolean isForce()
760     {
761         return force;
762     }
763
764     public void setForce( boolean force )
765     {
766         this.force = force;
767     }
768
769     public boolean isDryrun()
770     {
771         return dryrun;
772     }
773
774     public void setDryrun( boolean dryrun )
775     {
776         this.dryrun = dryrun;
777     }
778 }