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/*
 * 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.
 */
package org.eclipse.aether.internal.impl.synccontext.named;

import java.io.IOException;
import java.io.UncheckedIOException;
import java.nio.file.Path;
import java.util.Collection;
import java.util.stream.Collectors;

import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.artifact.Artifact;
import org.eclipse.aether.metadata.Metadata;
import org.eclipse.aether.util.DirectoryUtils;

import static java.util.Objects.requireNonNull;

/**
 * Wrapping {@link NameMapper} class that is file system friendly: it wraps another
 * {@link NameMapper} and resolves the resulting "file system friendly" names against local
 * repository basedir.
 *
 * @since 1.9.0
 */
public class BasedirNameMapper implements NameMapper {
    private static final String CONFIG_PROP_LOCKS_DIR = "aether.syncContext.named.basedir.locksDir";

    private final NameMapper delegate;

    public BasedirNameMapper(final NameMapper delegate) {
        this.delegate = requireNonNull(delegate);
    }

    @Override
    public boolean isFileSystemFriendly() {
        return delegate.isFileSystemFriendly();
    }

    @Override
    public Collection nameLocks(
            final RepositorySystemSession session,
            final Collection artifacts,
            final Collection metadatas) {
        try {
            final Path basedir = DirectoryUtils.resolveDirectory(session, ".locks", CONFIG_PROP_LOCKS_DIR, false);

            return delegate.nameLocks(session, artifacts, metadatas).stream()
                    .map(name -> basedir.resolve(name).toAbsolutePath().toString())
                    .collect(Collectors.toList());
        } catch (IOException e) {
            throw new UncheckedIOException(e);
        }
    }
}