src/main/java/org/apache/sling/tooling/lc/AetherSetup.java

/*
 * 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.apache.sling.tooling.lc;

import java.io.File;
import java.util.Arrays;
import java.util.List;

import org.apache.maven.repository.internal.MavenRepositorySystemUtils;
import org.eclipse.aether.DefaultRepositorySystemSession;
import org.eclipse.aether.RepositorySystem;
import org.eclipse.aether.artifact.DefaultArtifact;
import org.eclipse.aether.connector.basic.BasicRepositoryConnectorFactory;
import org.eclipse.aether.impl.DefaultServiceLocator;
import org.eclipse.aether.repository.LocalRepository;
import org.eclipse.aether.repository.RemoteRepository;
import org.eclipse.aether.resolution.ArtifactRequest;
import org.eclipse.aether.resolution.ArtifactResolutionException;
import org.eclipse.aether.resolution.ArtifactResult;
import org.eclipse.aether.spi.connector.RepositoryConnectorFactory;
import org.eclipse.aether.spi.connector.transport.TransporterFactory;
import org.eclipse.aether.transport.file.FileTransporterFactory;
import org.eclipse.aether.transport.http.HttpTransporterFactory;

class AetherSetup {
    
    private final List<RemoteRepository> repos = Arrays.asList(
        new RemoteRepository.Builder("central", "default", "http://central.maven.org/maven2/").build(),
        new RemoteRepository.Builder("apache", "default", "https://repository.apache.org/content/groups/snapshots/").build()
    );
    
    private final RepositorySystem system;
    private final DefaultRepositorySystemSession session;
            
    
    public AetherSetup() {
        
        DefaultServiceLocator locator = MavenRepositorySystemUtils.newServiceLocator();
        locator.addService(RepositoryConnectorFactory.class, BasicRepositoryConnectorFactory.class);
        locator.addService(TransporterFactory.class, FileTransporterFactory.class);
        locator.addService(TransporterFactory.class, HttpTransporterFactory.class);

        system = locator.getService(RepositorySystem.class);
        
        session = MavenRepositorySystemUtils.newSession();

        LocalRepository localRepo = new LocalRepository("target/local-repo");
        session.setLocalRepositoryManager(system.newLocalRepositoryManager(session, localRepo));
    }
    

    public File download(String coordinates) throws ArtifactResolutionException {
        ArtifactResult fromResult = system.resolveArtifact(session, new ArtifactRequest(new DefaultArtifact(coordinates), repos, null));

        return fromResult.getArtifact().getFile();
    }
}