/*
 * 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.karaf.features;

import java.net.URI;
import java.util.EnumSet;
import java.util.Set;

/**
 * The service managing features repositories.
 */
public interface FeaturesService {

    enum Option {
        NoCleanIfFailure,
        PrintBundlesToRefresh,
        NoAutoRefreshBundles,
        ContinueBatchOnFailure,
        Verbose
    }

    /**
     * Validate repository contents.
     * 
     * @param uri Repository uri.
     * @throws Exception When validation fails.
     */
    void validateRepository(URI uri) throws Exception;

    void addRepository(URI url) throws Exception;

    void removeRepository(URI url);
    
    void restoreRepository(URI url) throws Exception;

    Repository[] listRepositories();

    void installFeature(String name) throws Exception;
    
    void installFeature(String name, String version) throws Exception;

    void installFeature(String name, String version, EnumSet<Option> options) throws Exception;

    void installFeature(Feature f, EnumSet<Option> options) throws Exception;

    void installFeatures(Set<Feature> features, EnumSet<Option> options) throws Exception;

    void uninstallFeature(String name) throws Exception;
    
    void uninstallFeature(String name, String version) throws Exception;

    Feature[] listFeatures() throws Exception;

    Feature[] listInstalledFeatures();

    boolean isInstalled(Feature f);

    Feature getFeature(String name, String version) throws Exception;

    Feature getFeature(String name) throws Exception;
}