Giving FileStore a 'flush' method to push out changes. (The alternative was some sort of provider that Source utilized, but that seems overly complicated.) This added a 'Source#replaceAllBytes'.

lib/ac-api/src/main/java/com/webcodepro/applecommander/storage/FileEntrySource.java

@@ -34,7 +34,7 @@ import java.util.stream.Collectors;
 
 public class FileEntrySource implements Source {
     private final FileEntry fileEntry;
-    private final DataBuffer buffer;
+    private DataBuffer buffer;
     private boolean changed;
     private final Set<Hint> hints;
 
@@ -98,6 +98,12 @@ public class FileEntrySource implements Source {
         changed = true;
     }
 
+    @Override
+    public void replaceAllBytes(DataBuffer data) {
+        buffer = data;
+        changed = true;
+    }
+
     @Override
     public boolean hasChanged() {
         return changed;

lib/ac-api/src/main/java/org/applecommander/archive/zip/ZipFileEntry.java

@@ -31,7 +31,6 @@ import org.applecommander.util.FileMagic;
 import java.io.IOException;
 import java.io.UncheckedIOException;
 import java.nio.file.attribute.FileTime;
-import java.util.Date;
 import java.util.Objects;
 import java.util.Optional;
 import java.util.zip.ZipEntry;
@@ -83,6 +82,10 @@ public class ZipFileEntry implements FileEntry {
         return entry.getLastModifiedTime();
     }
 
+    public FileTime getLastAccessTime() {
+        return entry.getLastAccessTime();
+    }
+
     public long getCrc() {
         return entry.getCrc();
     }
@@ -91,6 +94,10 @@ public class ZipFileEntry implements FileEntry {
         return entry.getCompressedSize();
     }
 
+    public String getComment() {
+        return entry.getComment();
+    }
+
     public int getMethod() {
         return entry.getMethod();
     }
@@ -130,8 +137,8 @@ public class ZipFileEntry implements FileEntry {
                 .unlocked()
                 .size(getSize())
                 .BIN(0x0000)
-                .creation(new Date(getCreationTime().toMillis()))
-                .modification(new Date(getLastModifiedTime().toMillis()))
+                .creation(getCreationTime())
+                .modification(getLastModifiedTime())
                 .get();
     }
 

lib/ac-api/src/main/java/org/applecommander/archive/zip/ZipFileStore.java

@@ -26,9 +26,11 @@ import org.applecommander.filestore.FileEntry;
 import org.applecommander.filestore.FileStore;
 import org.applecommander.source.Source;
 import org.applecommander.util.Container;
+import org.applecommander.util.DataBuffer;
 import org.applecommander.util.InformationGroup;
 
 import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.UncheckedIOException;
 import java.nio.file.Files;
@@ -39,6 +41,9 @@ import java.util.Objects;
 import java.util.Optional;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
+import java.util.zip.ZipOutputStream;
+
+import static org.applecommander.util.Shorthand.copy;
 
 public class ZipFileStore implements FileStore {
     private final Source source;
@@ -93,12 +98,33 @@ public class ZipFileStore implements FileStore {
             .addLongField("Size", ZipFileEntry::getCompressedSize, Mode.DETAIL)
             .addPercentField("Ratio", ZipFileEntry::getCompressedSize, ZipFileEntry::getSize, "%2.0f%%", Mode.DETAIL)
             .addFileTimeField("Creation", ZipFileEntry::getCreationTime)
+            .addFileTimeField("Last Access", ZipFileEntry::getLastAccessTime, Mode.DETAIL)
             .addFileTimeField("Last Modified", ZipFileEntry::getLastModifiedTime)
             .addLongField("CRC-32", ZipFileEntry::getCrc, "%08x", Mode.DETAIL)
             .addStringField("Name", FileEntry::getName)
             .toList();
     }
 
+    @Override
+    public void flush() {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        try (ZipOutputStream zip = new ZipOutputStream(baos)) {
+            for (FileEntry fileEntry : entries) {
+                ZipFileEntry zipFileEntry = (ZipFileEntry) fileEntry;
+                ZipEntry zipEntry = new ZipEntry(zipFileEntry.getName());
+                copy(zipFileEntry::getCreationTime, zipEntry::setCreationTime);
+                copy(zipFileEntry::getLastAccessTime, zipEntry::setLastAccessTime);
+                copy(zipFileEntry::getLastModifiedTime, zipEntry::setLastModifiedTime);
+                copy(zipFileEntry::getComment, zipEntry::setComment);
+                zip.putNextEntry(zipEntry);
+                zip.write(fileEntry.getDataFork().asBytes());
+            }
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+        source.replaceAllBytes(DataBuffer.wrap(baos.toByteArray()));
+    }
+
     @Override
     public boolean can(Capability capability) {
         return false;

lib/ac-api/src/main/java/org/applecommander/archive/zip/ZipFileStoreFactory.java

@@ -20,6 +20,7 @@
 package org.applecommander.archive.zip;
 
 import org.applecommander.filestore.FileStoreFactory;
+import org.applecommander.source.Source;
 import org.applecommander.util.DataBuffer;
 
 public class ZipFileStoreFactory implements FileStoreFactory {
@@ -32,4 +33,8 @@ public class ZipFileStoreFactory implements FileStoreFactory {
             ctx.fileStores.add(new ZipFileStore(ctx.source));
         }
     }
+
+    public static ZipFileStore create(Source source) {
+        return new ZipFileStore(source);
+    }
 }

lib/ac-api/src/main/java/org/applecommander/filestore/FileStore.java

@@ -42,4 +42,20 @@ public interface FileStore extends CapabilityProvider, Container, InformationPro
 
     /// Yields a list of columns to be used in this display mode.
     List<DisplayColumn> getDisplayColumns();
+
+    /// Flush any pending writes back to the source. This is intended to handle archives
+    /// as they do not have a fixed structure to write changes. `flush` should be invoked
+    /// before a save.
+    ///
+    /// Example usage:
+    ///
+    /// ```java
+    /// FileStore fileStore = fileStoreSelection.getSelectedItem();
+    /// fileStore.flush();
+    /// Source source = fileStore.get(Source.class).orElseThrow();
+    /// source.save();
+    /// ```
+    default void flush() {
+        // Do Nothing
+    }
 }

lib/ac-api/src/main/java/org/applecommander/image/DiskCopyImage.java

@@ -125,6 +125,11 @@ public class DiskCopyImage implements Source {
         this.source.writeBytes(HEADER_SIZE+offset, data);
     }
 
+    @Override
+    public void replaceAllBytes(DataBuffer data) {
+        this.source.replaceAllBytes(data);
+    }
+
     @Override
     public boolean hasChanged() {
         return source.hasChanged();

lib/ac-api/src/main/java/org/applecommander/image/UniversalDiskImage.java

@@ -126,6 +126,11 @@ public class UniversalDiskImage implements Source {
         source.writeBytes(this.info.dataOffset + offset, data);
     }
 
+    @Override
+    public void replaceAllBytes(DataBuffer data) {
+        source.replaceAllBytes(data);
+    }
+
     @Override
     public boolean hasChanged() {
         return source.hasChanged();

lib/ac-api/src/main/java/org/applecommander/source/DataBufferSource.java

@@ -31,7 +31,7 @@ import java.util.Optional;
 import java.util.Set;
 
 public class DataBufferSource implements Source {
-    private final DataBuffer dataBuffer;
+    private DataBuffer dataBuffer;
     private final String name;
     private final Set<Capability> capabilities;
     private final Set<Hint> hints;
@@ -74,6 +74,12 @@ public class DataBufferSource implements Source {
         changed = true;
     }
 
+    @Override
+    public void replaceAllBytes(DataBuffer data) {
+        dataBuffer = data;
+        changed = true;
+    }
+
     @Override
     public boolean hasChanged() {
         return changed;

lib/ac-api/src/main/java/org/applecommander/source/FileEntrySource.java

@@ -33,7 +33,7 @@ import java.util.stream.Collectors;
 
 public class FileEntrySource implements Source {
     private final FileEntry fileEntry;
-    private final DataBuffer buffer;
+    private DataBuffer buffer;
     private boolean changed;
     private final Set<Hint> hints;
 
@@ -85,6 +85,12 @@ public class FileEntrySource implements Source {
         changed = true;
     }
 
+    @Override
+    public void replaceAllBytes(DataBuffer data) {
+        buffer = data;
+        changed = true;
+    }
+
     @Override
     public boolean hasChanged() {
         return changed;

lib/ac-api/src/main/java/org/applecommander/source/FileSource.java

@@ -111,6 +111,12 @@ public class FileSource implements Source {
         changed = true;
     }
 
+    @Override
+    public void replaceAllBytes(DataBuffer data) {
+        buffer = data;
+        changed = true;
+    }
+
     @Override
     public boolean hasChanged() {
         return changed;

lib/ac-api/src/main/java/org/applecommander/source/Source.java

@@ -74,6 +74,9 @@ public interface Source extends CapabilityProvider, HintProvider, Container, Inf
     /// Write bytes to this source. Updates the changed status.
     void writeBytes(int offset, DataBuffer data);
 
+    /// Replace ALL bytes in this Source.
+    void replaceAllBytes(DataBuffer data);
+
     /// Indicates if this source has changed.
     boolean hasChanged();
 

lib/ac-api/src/main/java/org/applecommander/transfer/ProdosAttributes.java

@@ -22,6 +22,7 @@ package org.applecommander.transfer;
 import org.applecommander.util.DataBuffer;
 import org.applecommander.util.FileMagic;
 
+import java.nio.file.attribute.FileTime;
 import java.util.Date;
 import java.util.Optional;
 
@@ -102,10 +103,22 @@ public record ProdosAttributes(String name, int access, int fileType, int auxTyp
             this.size = size;
             return this;
         }
+        public Builder creation(FileTime creation) {
+            if (creation != null) {
+                this.creation = new Date(creation.toMillis());
+            }
+            return this;
+        }
         public Builder creation(Date creation) {
             this.creation = creation;
             return this;
         }
+        public Builder modification(FileTime modified) {
+            if (modified != null) {
+                this.modified = new Date(modified.toMillis());
+            }
+            return this;
+        }
         public Builder modification(Date modified) {
             this.modified = modified;
             return this;

lib/ac-api/src/main/java/org/applecommander/util/Shorthand.java

@@ -0,0 +1,14 @@
+package org.applecommander.util;
+
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+
+public abstract class Shorthand {
+    /// This is a shorthand method to only set non-null values.
+    public static <T> void copy(Supplier<T> supplier, Consumer<T> consumer) {
+        T value = supplier.get();
+        if (value != null) {
+            consumer.accept(value);
+        }
+    }
+}