package org.apache.archiva.proxy.model;

/*
 * 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.
 */

import org.apache.archiva.model.ArtifactReference;
import org.apache.archiva.policies.ProxyDownloadException;
import org.apache.archiva.repository.ManagedRepositoryContent;

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

/**
 * Handler for potential repository proxy connectors.
 *
 *
 */
public interface RepositoryProxyConnectors
{
    /**
     * Performs the artifact fetch operation against the target repositories
     * of the provided source repository.
     * 
     * If the artifact is found, it is downloaded and placed into the source repository
     * filesystem.
     * 
     * @param repository the source repository to use. (must be a managed repository)
     * @param artifact the artifact to fetch.
     * @return the file that was obtained, or null if no content was obtained
     * @throws ProxyDownloadException if there was a problem fetching the content from the target repositories.
     */
    File fetchFromProxies( ManagedRepositoryContent repository, ArtifactReference artifact )
        throws ProxyDownloadException;
    
    /**
     * Performs the metadata fetch operation against the target repositories
     * of the provided source repository.
     * 
     * If the metadata is found, it is downloaded and placed into the source repository
     * filesystem.
     * 
     * @param repository the source repository to use. (must be a managed repository)
     * @param logicalPath the metadata to fetch.
     * @return the file that was obtained, or null if no content was obtained
     */
    ProxyFetchResult fetchMetadataFromProxies( ManagedRepositoryContent repository, String logicalPath );

    /**
     * Performs the fetch operation against the target repositories
     * of the provided source repository.
     * 
     * @param managedRepository the source repository to use. (must be a managed repository)
     * @param path the path of the resource to fetch
     * @return the file that was obtained, or null if no content was obtained
     */
    File fetchFromProxies( ManagedRepositoryContent managedRepository, String path );

    /**
     * Get the List of {@link ProxyConnector} objects of the source repository.
     * 
     * @param repository the source repository to look for.
     * @return the List of {@link ProxyConnector} objects.
     */
    List<ProxyConnector> getProxyConnectors( ManagedRepositoryContent repository );

    /**
     * Tests to see if the provided repository is a source repository for
     * any {@link ProxyConnector} objects.
     * 
     * @param repository the source repository to look for.
     * @return true if there are proxy connectors that use the provided 
     *   repository as a source repository.
     */
    boolean hasProxies( ManagedRepositoryContent repository );
}
