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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 shaded.shaded.org.eclipse.aether.internal.impl;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Set;

import org.eclipse.aether.RepositoryEvent;
import org.eclipse.aether.RepositoryListener;
import shaded.shaded.org.eclipse.aether.impl.RepositoryEventDispatcher;
import shaded.shaded.org.eclipse.aether.spi.locator.Service;
import shaded.shaded.org.eclipse.aether.spi.locator.ServiceLocator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static java.util.Objects.requireNonNull;

/**
 */
@Singleton
@Named
public class DefaultRepositoryEventDispatcher implements RepositoryEventDispatcher, Service {

    private static final Logger LOGGER = LoggerFactory.getLogger(DefaultRepositoryEventDispatcher.class);

    private Collection listeners = new ArrayList<>();

    @Deprecated
    public DefaultRepositoryEventDispatcher() {
        // enables no-arg constructor
    }

    @Inject
    public DefaultRepositoryEventDispatcher(Set listeners) {
        setRepositoryListeners(listeners);
    }

    public DefaultRepositoryEventDispatcher addRepositoryListener(RepositoryListener listener) {
        this.listeners.add(requireNonNull(listener, "repository listener cannot be null"));
        return this;
    }

    public DefaultRepositoryEventDispatcher setRepositoryListeners(Collection listeners) {
        if (listeners == null) {
            this.listeners = new ArrayList<>();
        } else {
            this.listeners = listeners;
        }
        return this;
    }

    public void initService(ServiceLocator locator) {
        setRepositoryListeners(locator.getServices(RepositoryListener.class));
    }

    public void dispatch(RepositoryEvent event) {
        requireNonNull(event, "event cannot be null");
        if (!listeners.isEmpty()) {
            for (RepositoryListener listener : listeners) {
                dispatch(event, listener);
            }
        }

        RepositoryListener listener = event.getSession().getRepositoryListener();

        if (listener != null) {
            dispatch(event, listener);
        }
    }

    private void dispatch(RepositoryEvent event, RepositoryListener listener) {
        try {
            switch (event.getType()) {
                case ARTIFACT_DEPLOYED:
                    listener.artifactDeployed(event);
                    break;
                case ARTIFACT_DEPLOYING:
                    listener.artifactDeploying(event);
                    break;
                case ARTIFACT_DESCRIPTOR_INVALID:
                    listener.artifactDescriptorInvalid(event);
                    break;
                case ARTIFACT_DESCRIPTOR_MISSING:
                    listener.artifactDescriptorMissing(event);
                    break;
                case ARTIFACT_DOWNLOADED:
                    listener.artifactDownloaded(event);
                    break;
                case ARTIFACT_DOWNLOADING:
                    listener.artifactDownloading(event);
                    break;
                case ARTIFACT_INSTALLED:
                    listener.artifactInstalled(event);
                    break;
                case ARTIFACT_INSTALLING:
                    listener.artifactInstalling(event);
                    break;
                case ARTIFACT_RESOLVED:
                    listener.artifactResolved(event);
                    break;
                case ARTIFACT_RESOLVING:
                    listener.artifactResolving(event);
                    break;
                case METADATA_DEPLOYED:
                    listener.metadataDeployed(event);
                    break;
                case METADATA_DEPLOYING:
                    listener.metadataDeploying(event);
                    break;
                case METADATA_DOWNLOADED:
                    listener.metadataDownloaded(event);
                    break;
                case METADATA_DOWNLOADING:
                    listener.metadataDownloading(event);
                    break;
                case METADATA_INSTALLED:
                    listener.metadataInstalled(event);
                    break;
                case METADATA_INSTALLING:
                    listener.metadataInstalling(event);
                    break;
                case METADATA_INVALID:
                    listener.metadataInvalid(event);
                    break;
                case METADATA_RESOLVED:
                    listener.metadataResolved(event);
                    break;
                case METADATA_RESOLVING:
                    listener.metadataResolving(event);
                    break;
                default:
                    throw new IllegalStateException("unknown repository event type " + event.getType());
            }
        } catch (Exception | LinkageError e) {
            logError(e, listener);
        }
    }

    private void logError(Throwable e, Object listener) {
        LOGGER.warn(
                "Failed to dispatch repository event to {}", listener.getClass().getCanonicalName(), e);
    }
}