/*
    * 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;
  
  import java.util.Map;
  
  import org.eclipse.aether.artifact.ArtifactTypeRegistry;
  import org.eclipse.aether.collection.DependencyGraphTransformer;
  import org.eclipse.aether.collection.DependencyManager;
  import org.eclipse.aether.collection.DependencySelector;
  import org.eclipse.aether.collection.DependencyTraverser;
  import org.eclipse.aether.collection.VersionFilter;
  import org.eclipse.aether.repository.AuthenticationSelector;
  import org.eclipse.aether.repository.LocalRepository;
  import org.eclipse.aether.repository.LocalRepositoryManager;
  import org.eclipse.aether.repository.MirrorSelector;
  import org.eclipse.aether.repository.ProxySelector;
  import org.eclipse.aether.repository.WorkspaceReader;
  import org.eclipse.aether.resolution.ArtifactDescriptorPolicy;
  import org.eclipse.aether.resolution.ResolutionErrorPolicy;
  import org.eclipse.aether.scope.ScopeManager;
  import org.eclipse.aether.scope.SystemDependencyScope;
  import org.eclipse.aether.transfer.TransferListener;
  
  /**
   * A special repository system session to enable decorating or proxying another session. To do so, clients have to
   * create a subclass and implement {@link #getSession()}, and optionally override other methods.
   */
  public abstract class AbstractForwardingRepositorySystemSession implements RepositorySystemSession {
  
      /**
       * Creates a new forwarding session.
       */
      protected AbstractForwardingRepositorySystemSession() {}
  
      /**
       * Gets the repository system session to which this instance forwards calls. It's worth noting that this class does
       * not save/cache the returned reference but queries this method before each forwarding. Hence, the session
       * forwarded to may change over time or depending on the context (e.g. calling thread).
       *
       * @return The repository system session to forward calls to, never {@code null}.
       */
      protected abstract RepositorySystemSession getSession();
  
      @Override
      public boolean isOffline() {
          return getSession().isOffline();
      }
  
      @Override
      public boolean isIgnoreArtifactDescriptorRepositories() {
          return getSession().isIgnoreArtifactDescriptorRepositories();
      }
  
      @Override
      public ResolutionErrorPolicy getResolutionErrorPolicy() {
          return getSession().getResolutionErrorPolicy();
      }
  
      @Override
      public ArtifactDescriptorPolicy getArtifactDescriptorPolicy() {
          return getSession().getArtifactDescriptorPolicy();
      }
  
      @Override
      public String getChecksumPolicy() {
          return getSession().getChecksumPolicy();
      }
  
      @Override
      public String getUpdatePolicy() {
          return getSession().getUpdatePolicy();
      }
  
      @Override
      public String getArtifactUpdatePolicy() {
          return getSession().getArtifactUpdatePolicy();
      }
  
      @Override
      public String getMetadataUpdatePolicy() {
          return getSession().getMetadataUpdatePolicy();
      }
 
     @Override
     public LocalRepository getLocalRepository() {
         return getSession().getLocalRepository();
     }
 
     @Override
     public LocalRepositoryManager getLocalRepositoryManager() {
         return getSession().getLocalRepositoryManager();
     }
 
     @Override
     public WorkspaceReader getWorkspaceReader() {
         return getSession().getWorkspaceReader();
     }
 
     @Override
     public RepositoryListener getRepositoryListener() {
         return getSession().getRepositoryListener();
     }
 
     @Override
     public TransferListener getTransferListener() {
         return getSession().getTransferListener();
     }
 
     @Override
     public Map<String, String> getSystemProperties() {
         return getSession().getSystemProperties();
     }
 
     @Override
     public Map<String, String> getUserProperties() {
         return getSession().getUserProperties();
     }
 
     @Override
     public Map<String, Object> getConfigProperties() {
         return getSession().getConfigProperties();
     }
 
     @Override
     public MirrorSelector getMirrorSelector() {
         return getSession().getMirrorSelector();
     }
 
     @Override
     public ProxySelector getProxySelector() {
         return getSession().getProxySelector();
     }
 
     @Override
     public AuthenticationSelector getAuthenticationSelector() {
         return getSession().getAuthenticationSelector();
     }
 
     @Override
     public ArtifactTypeRegistry getArtifactTypeRegistry() {
         return getSession().getArtifactTypeRegistry();
     }
 
     @Override
     public DependencyTraverser getDependencyTraverser() {
         return getSession().getDependencyTraverser();
     }
 
     @Override
     public DependencyManager getDependencyManager() {
         return getSession().getDependencyManager();
     }
 
     @Override
     public DependencySelector getDependencySelector() {
         return getSession().getDependencySelector();
     }
 
     @Override
     public VersionFilter getVersionFilter() {
         return getSession().getVersionFilter();
     }
 
     @Override
     public DependencyGraphTransformer getDependencyGraphTransformer() {
         return getSession().getDependencyGraphTransformer();
     }
 
     @Override
     public SessionData getData() {
         return getSession().getData();
     }
 
     @Override
     public RepositoryCache getCache() {
         return getSession().getCache();
     }
 
     @Override
     public ScopeManager getScopeManager() {
         return getSession().getScopeManager();
     }
 
     @Override
     public SystemDependencyScope getSystemDependencyScope() {
         return getSession().getSystemDependencyScope();
     }
 
     @Override
     public boolean addOnSessionEndedHandler(Runnable handler) {
         return getSession().addOnSessionEndedHandler(handler);
     }
 }