package org.apache.maven.artifact;

 /*

  * 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.versioning.VersionRange;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.Iterator;

 import java.util.LinkedHashMap;

 import java.util.List;

 import java.util.Map;

 import java.util.regex.Matcher;

 public final class ArtifactUtils

 {

     private ArtifactUtils()

     {

     }

     public static boolean isSnapshot( String version )

     {

         return version != null &&

             ( version.toUpperCase().endsWith( Artifact.SNAPSHOT_VERSION ) || Artifact.VERSION_FILE_PATTERN.matcher( version )

                 .matches() );

     }

     public static String toSnapshotVersion( String version )

     {

         Matcher m = Artifact.VERSION_FILE_PATTERN.matcher( version );

         if ( m.matches() )

         {

             return m.group( 1 ) + '-' + Artifact.SNAPSHOT_VERSION;

         }

         else

         {

             return version;

         }

     }

     public static String versionlessKey( Artifact artifact )

     {

         return versionlessKey( artifact.getGroupId(), artifact.getArtifactId() );

     }

     public static String versionlessKey( String groupId, String artifactId )

     {

         if ( groupId == null )

         {

             throw new NullPointerException( "groupId was null" );

         }

         if ( artifactId == null )

         {

             throw new NullPointerException( "artifactId was null" );

         }

         return groupId + ":" + artifactId;

     }

     public static String artifactId( String groupId, String artifactId, String type, String version )

     {

         return artifactId( groupId, artifactId, type, null, version );

     }

     public static String artifactId( String groupId, String artifactId, String type, String classifier,

                                      String baseVersion )

     {

         return groupId + ":" + artifactId + ":" + type + ( classifier != null ? ":" + classifier : "" ) + ":" +

             baseVersion;

     }

     public static Map artifactMapByVersionlessId( Collection artifacts )

     {

         Map artifactMap = new LinkedHashMap();

         if ( artifacts != null )

         {

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

             {

                 Artifact artifact = (Artifact) it.next();

                 artifactMap.put( versionlessKey( artifact ), artifact );

             }

         }

         return artifactMap;

     }

     public static Map artifactMapByArtifactId( Collection artifacts )

     {

         Map artifactMap = new LinkedHashMap();

         if ( artifacts != null )

         {

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

             {

                 Artifact artifact = (Artifact) it.next();

                 artifactMap.put( artifact.getId(), artifact );

             }

         }

         return artifactMap;

     }

     public static Artifact copyArtifact( Artifact artifact )

     {

         VersionRange range = artifact.getVersionRange();

         DefaultArtifact clone = new DefaultArtifact( artifact.getGroupId(), artifact.getArtifactId(), range.cloneOf(),

                                                      artifact.getScope(), artifact.getType(), artifact.getClassifier(),

                                                      artifact.getArtifactHandler(), artifact.isOptional() );

         clone.setRelease( artifact.isRelease() );

         clone.setResolvedVersion( artifact.getVersion() );

         clone.setResolved( artifact.isResolved() );

         clone.setFile( artifact.getFile() );

         clone.setAvailableVersions( copyList( artifact.getAvailableVersions() ) );

         clone.setBaseVersion( artifact.getBaseVersion() );

         clone.setDependencyFilter( artifact.getDependencyFilter() );

         clone.setDependencyTrail( copyList( artifact.getDependencyTrail() ) );

         clone.setDownloadUrl( artifact.getDownloadUrl() );

         clone.setRepository( artifact.getRepository() );

         return clone;

     }

     private static List copyList( List original )

     {

         List copy = null;

         if ( original != null )

         {

             copy = new ArrayList();

             if ( !original.isEmpty() )

             {

                 copy.addAll( original );

             }

         }

         return copy;

     }

 }