001package org.eclipse.aether.internal.impl.synccontext.named;
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
022import java.util.Collection;
023import java.util.Collections;
024
025import org.eclipse.aether.RepositorySystemSession;
026import org.eclipse.aether.artifact.Artifact;
027import org.eclipse.aether.metadata.Metadata;
028
029/**
030 * Static {@link NameMapper}, always assigns one same name, effectively becoming equivalent to "static" sync context:
031 * always maps ANY input to same name.
032 */
033public class StaticNameMapper implements NameMapper
034{
035    @Override
036    public boolean isFileSystemFriendly()
037    {
038        return true;
039    }
040
041    @Override
042    public Collection<String> nameLocks( final RepositorySystemSession session,
043                                         final Collection<? extends Artifact> artifacts,
044                                         final Collection<? extends Metadata> metadatas )
045    {
046        if ( ( artifacts != null && !artifacts.isEmpty() ) || ( metadatas != null && !metadatas.isEmpty() ) )
047        {
048            return Collections.singletonList( "static" );
049        }
050        else
051        {
052            return Collections.emptyList();
053        }
054    }
055}