001    package org.apache.maven.plugin.internal;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one
005     * or more contributor license agreements.  See the NOTICE file
006     * distributed with this work for additional information
007     * regarding copyright ownership.  The ASF licenses this file
008     * to you under the Apache License, Version 2.0 (the
009     * "License"); you may not use this file except in compliance
010     * with the License.  You may obtain a copy of the License at
011     *
012     *   http://www.apache.org/licenses/LICENSE-2.0
013     *
014     * Unless required by applicable law or agreed to in writing,
015     * software distributed under the License is distributed on an
016     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017     * KIND, either express or implied.  See the License for the
018     * specific language governing permissions and limitations
019     * under the License.
020     */
021    
022    import org.apache.maven.execution.MavenSession;
023    import org.apache.maven.plugin.LegacySupport;
024    import org.codehaus.plexus.component.annotations.Component;
025    import org.sonatype.aether.RepositorySystemSession;
026    
027    /**
028     * Helps to provide backward-compatibility with plugins that use legacy components. <strong>Warning:</strong> This is an
029     * internal utility component that is only public for technical reasons, it is not part of the public API. In
030     * particular, this component can be changed or deleted without prior notice.
031     * 
032     * @since 3.0
033     * @author Benjamin Bentmann
034     */
035    @Component( role = LegacySupport.class )
036    public class DefaultLegacySupport
037        implements LegacySupport
038    {
039    
040        private static final ThreadLocal<MavenSession[]> session = new InheritableThreadLocal<MavenSession[]>();
041    
042        public void setSession( MavenSession session )
043        {
044            if ( session == null )
045            {
046                MavenSession[] oldSession = DefaultLegacySupport.session.get();
047                if ( oldSession != null )
048                {
049                    oldSession[0] = null;
050                    DefaultLegacySupport.session.remove();
051                }
052            }
053            else
054            {
055                DefaultLegacySupport.session.set( new MavenSession[] { session } );
056            }
057        }
058    
059        public MavenSession getSession()
060        {
061            MavenSession[] currentSession = DefaultLegacySupport.session.get();
062            return currentSession != null ? currentSession[0] : null;
063        }
064    
065        public RepositorySystemSession getRepositorySession()
066        {
067            MavenSession session = getSession();
068            return ( session != null ) ? session.getRepositorySession() : null;
069        }
070    
071    }