001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.eclipse.aether.internal.impl.synccontext.named;
020
021import java.util.Collection;
022import java.util.Collections;
023
024import org.eclipse.aether.RepositorySystemSession;
025import org.eclipse.aether.artifact.Artifact;
026import org.eclipse.aether.metadata.Metadata;
027import org.eclipse.aether.named.NamedLockKey;
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    @Override
035    public boolean isFileSystemFriendly() {
036        return true;
037    }
038
039    @Override
040    public Collection<NamedLockKey> nameLocks(
041            final RepositorySystemSession session,
042            final Collection<? extends Artifact> artifacts,
043            final Collection<? extends Metadata> metadatas) {
044        if (artifacts != null && !artifacts.isEmpty()) {
045            return Collections.singletonList(NamedLockKey.of("static-artifact"));
046        } else if (metadatas != null && !metadatas.isEmpty()) {
047            return Collections.singletonList(NamedLockKey.of("static-metadata"));
048        } else {
049            return Collections.emptyList();
050        }
051    }
052}