Drop FileTransformer API

maven-resolver-api/src/main/java/org/eclipse/aether/AbstractForwardingRepositorySystemSession.java

@@ -36,7 +36,6 @@
 import org.eclipse.aether.resolution.ArtifactDescriptorPolicy;
 import org.eclipse.aether.resolution.ResolutionErrorPolicy;
 import org.eclipse.aether.transfer.TransferListener;
-import org.eclipse.aether.transform.FileTransformerManager;
 
 /**
  * A special repository system session to enable decorating or proxying another session. To do so, clients have to
@@ -211,10 +210,4 @@ public RepositoryCache getCache()
     {
         return getSession().getCache();
     }
-
-    @Override
-    public FileTransformerManager getFileTransformerManager()
-    {
-        return getSession().getFileTransformerManager();
-    }
 }

maven-resolver-api/src/main/java/org/eclipse/aether/DefaultRepositorySystemSession.java

@@ -19,12 +19,10 @@
  * under the License.
  */
 
-import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
-import org.eclipse.aether.artifact.Artifact;
 import org.eclipse.aether.artifact.ArtifactType;
 import org.eclipse.aether.artifact.ArtifactTypeRegistry;
 import org.eclipse.aether.collection.DependencyGraphTransformer;
@@ -45,8 +43,6 @@
 import org.eclipse.aether.resolution.ArtifactDescriptorPolicy;
 import org.eclipse.aether.resolution.ResolutionErrorPolicy;
 import org.eclipse.aether.transfer.TransferListener;
-import org.eclipse.aether.transform.FileTransformer;
-import org.eclipse.aether.transform.FileTransformerManager;
 
 import static java.util.Objects.requireNonNull;
 
@@ -78,8 +74,6 @@ public final class DefaultRepositorySystemSession
 
     private LocalRepositoryManager localRepositoryManager;
 
-    private FileTransformerManager fileTransformerManager;
-
     private WorkspaceReader workspaceReader;
 
     private RepositoryListener repositoryListener;
@@ -137,7 +131,6 @@ public DefaultRepositorySystemSession()
         proxySelector = NullProxySelector.INSTANCE;
         authenticationSelector = NullAuthenticationSelector.INSTANCE;
         artifactTypeRegistry = NullArtifactTypeRegistry.INSTANCE;
-        fileTransformerManager = NullFileTransformerManager.INSTANCE;
         data = new DefaultSessionData();
     }
 
@@ -175,7 +168,6 @@ public DefaultRepositorySystemSession( RepositorySystemSession session )
         setDependencySelector( session.getDependencySelector() );
         setVersionFilter( session.getVersionFilter() );
         setDependencyGraphTransformer( session.getDependencyGraphTransformer() );
-        setFileTransformerManager( session.getFileTransformerManager() );
         setData( session.getData() );
         setCache( session.getCache() );
     }
@@ -336,23 +328,6 @@ public DefaultRepositorySystemSession setLocalRepositoryManager( LocalRepository
         return this;
     }
 
-    @Override
-    public FileTransformerManager getFileTransformerManager()
-    {
-        return fileTransformerManager;
-    }
-
-    public DefaultRepositorySystemSession setFileTransformerManager( FileTransformerManager fileTransformerManager )
-    {
-        verifyStateForMutation();
-        this.fileTransformerManager = fileTransformerManager;
-        if ( this.fileTransformerManager == null )
-        {
-            this.fileTransformerManager = NullFileTransformerManager.INSTANCE;
-        }
-        return this;
-    }
-
     @Override
     public WorkspaceReader getWorkspaceReader()
     {
@@ -889,15 +864,4 @@ public ArtifactType get( String typeId )
         }
 
     }
-
-    static final class NullFileTransformerManager implements FileTransformerManager
-    {
-        public static final FileTransformerManager INSTANCE = new NullFileTransformerManager();
-
-        @Override
-        public Collection<FileTransformer> getTransformersForArtifact( Artifact artifact )
-        {
-            return Collections.emptyList();
-        }
-    }
 }

maven-resolver-api/src/main/java/org/eclipse/aether/RepositorySystemSession.java

@@ -37,7 +37,6 @@
 import org.eclipse.aether.resolution.ArtifactDescriptorPolicy;
 import org.eclipse.aether.resolution.ResolutionErrorPolicy;
 import org.eclipse.aether.transfer.TransferListener;
-import org.eclipse.aether.transform.FileTransformerManager;
 
 /**
  * Defines settings and components that control the repository system. Once initialized, the session object itself is
@@ -260,14 +259,4 @@ public interface RepositorySystemSession
      * @return The repository cache or {@code null} if none.
      */
     RepositoryCache getCache();
-
-    /**
-     * Get the file transformer manager
-     * 
-     * @return the manager, never {@code null}
-     * @deprecated Without any direct replacement for now. This API is OOM-prone, and also lacks a lot of context about
-     * transforming.
-     */
-    @Deprecated
-    FileTransformerManager getFileTransformerManager();
 }