1 files changed, 105 insertions, 0 deletions
diff --git a/src/main/java/com/keuin/kbackupfabric/backup/incremental/manager/IncCopyResult.java b/src/main/java/com/keuin/kbackupfabric/backup/incremental/manager/IncCopyResult.java
new file mode 100644
index 0000000..6011ea5
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/backup/incremental/manager/IncCopyResult.java
@@ -0,0 +1,105 @@
+package com.keuin.kbackupfabric.backup.incremental.manager;
+
+import com.keuin.kbackupfabric.backup.BackupFilesystemUtil;
+
+import java.util.Objects;
+
+/**
+ * Returned by `addObjectCollection` in IncrementalBackupStorageManager.
+ * Immutable.
+ */
+public class IncCopyResult {
+
+    private final int totalFiles;
+    private final int filesCopied;
+    private final long bytesCopied;
+    private final long bytesTotal;
+
+    public static final IncCopyResult ZERO = new IncCopyResult(0, 0, 0, 0);
+
+    public IncCopyResult(int totalFiles, int filesCopied, long bytesCopied, long bytesTotal) {
+        this.totalFiles = totalFiles;
+        this.filesCopied = filesCopied;
+        this.bytesCopied = bytesCopied;
+        this.bytesTotal = bytesTotal;
+    }
+
+    /**
+     * Get total files in the collection, containing reused files.
+     *
+     * @return file count.
+     */
+    public int getTotalFiles() {
+        return totalFiles;
+    }
+
+    /**
+     * Get new files added to the base.
+     *
+     * @return file count.
+     */
+    public int getFilesCopied() {
+        return filesCopied;
+    }
+
+    /**
+     * Get total bytes of new files added to the base.
+     *
+     * @return bytes.
+     */
+    public long getBytesCopied() {
+        return bytesCopied;
+    }
+
+    /**
+     * Get total bytes of all files in the collection. This equals to copied_files_bytes + reused_files_bytes.
+     *
+     * @return bytes.
+     */
+    public long getBytesTotal() {
+        return bytesTotal;
+    }
+
+    /**
+     * Add with another AddResult.
+     *
+     * @param a object.
+     * @return the add result.
+     */
+    public IncCopyResult addWith(IncCopyResult a) {
+        Objects.requireNonNull(a);
+        return new IncCopyResult(
+                totalFiles + a.totalFiles,
+                filesCopied + a.filesCopied,
+                bytesCopied + a.bytesCopied,
+                bytesTotal + a.bytesTotal
+        );
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        IncCopyResult that = (IncCopyResult) o;
+        return totalFiles == that.totalFiles &&
+                filesCopied == that.filesCopied &&
+                bytesCopied == that.bytesCopied &&
+                bytesTotal == that.bytesTotal;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(totalFiles, filesCopied, bytesCopied, bytesTotal);
+    }
+
+    @Override
+    public String toString() {
+        return String.format(
+                "Files copied: %d (%s in size, totally %d files). Total file tree size: %s.",
+                filesCopied,
+                BackupFilesystemUtil.getFriendlyFileSizeString(bytesCopied),
+                totalFiles,
+                BackupFilesystemUtil.getFriendlyFileSizeString(bytesTotal)
+        );
+    }
+}