Extract filters for protocol features used for specific file attributes in file transfers.

Author: dkocher

core/src/main/java/ch/cyberduck/core/transfer/ChainedFeatureFilter.java

@@ -0,0 +1,53 @@
+package ch.cyberduck.core.transfer;
+
+/*
+ * Copyright (c) 2002-2024 iterate GmbH. All rights reserved.
+ * https://cyberduck.io/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+import ch.cyberduck.core.Local;
+import ch.cyberduck.core.Path;
+import ch.cyberduck.core.ProgressListener;
+import ch.cyberduck.core.exception.BackgroundException;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.Optional;
+
+public class ChainedFeatureFilter implements FeatureFilter {
+    private static final Logger log = LogManager.getLogger(ChainedFeatureFilter.class);
+
+    private final FeatureFilter[] filters;
+
+    public ChainedFeatureFilter(final FeatureFilter... filters) {
+        this.filters = filters;
+    }
+
+    @Override
+    public TransferStatus prepare(final Path file, final Optional<Local> local, final TransferStatus status, final ProgressListener progress) throws BackgroundException {
+        for(final FeatureFilter filter : filters) {
+            log.debug("Prepare {} with {}", file, filter);
+            filter.prepare(file, local, status, progress);
+        }
+        return status;
+    }
+
+    @Override
+    public void complete(final Path file, final Optional<Local> local, final TransferStatus status, final ProgressListener progress) throws BackgroundException {
+        for(final FeatureFilter filter : filters) {
+            log.debug("Complete {} with {}", file, filter);
+            filter.complete(file, local, status, progress);
+        }
+    }
+}

core/src/main/java/ch/cyberduck/core/transfer/FeatureFilter.java

@@ -0,0 +1,46 @@
+package ch.cyberduck.core.transfer;
+
+/*
+ * Copyright (c) 2002-2024 iterate GmbH. All rights reserved.
+ * https://cyberduck.io/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+import ch.cyberduck.core.Local;
+import ch.cyberduck.core.Path;
+import ch.cyberduck.core.ProgressListener;
+import ch.cyberduck.core.exception.BackgroundException;
+
+import java.util.Optional;
+
+public interface FeatureFilter {
+    default TransferStatus prepare(final Path file, final Optional<Local> local, final TransferStatus status, final ProgressListener progress) throws BackgroundException {
+        // No-op
+        return status;
+    }
+
+    default void apply(final Path file, final TransferStatus status, final ProgressListener progress) throws BackgroundException {
+        // No-op
+    }
+
+    default void complete(final Path file, final Optional<Local> local,  final TransferStatus status, final ProgressListener progress) throws BackgroundException {
+        // No-op
+    }
+
+    FeatureFilter noop = new FeatureFilter() {
+        @Override
+        public TransferStatus prepare(final Path file, final Optional<Local> local, final TransferStatus status, final ProgressListener progress) {
+            // No-op
+            return status;
+        }
+    };
+}