1 files changed, 30 insertions, 0 deletions
diff --git a/src/main/java/com/healthmarketscience/jackcess/impl/ColumnImpl.java b/src/main/java/com/healthmarketscience/jackcess/impl/ColumnImpl.java
index a6cba97..ae68a17 100644
--- a/src/main/java/com/healthmarketscience/jackcess/impl/ColumnImpl.java
+++ b/src/main/java/com/healthmarketscience/jackcess/impl/ColumnImpl.java
@@ -1994,6 +1994,11 @@ public class ColumnImpl implements Column, Comparable<ColumnImpl> {
     public abstract Object getNext(Object prevRowValue);
 
     /**
+     * Restores a previous autonumber generated by this generator.
+     */
+    public abstract void restoreLast(Object last);
+    
+    /**
      * Returns the type of values generated by this generator.
      */
     public abstract DataType getType();
@@ -2016,6 +2021,13 @@ public class ColumnImpl implements Column, Comparable<ColumnImpl> {
     }
 
     @Override
+    public void restoreLast(Object last) {
+      if(last instanceof Integer) {
+        getTable().restoreLastLongAutoNumber((Integer)last);
+      }
+    }
+    
+    @Override
     public DataType getType() {
       return DataType.LONG;
     }
@@ -2040,6 +2052,11 @@ public class ColumnImpl implements Column, Comparable<ColumnImpl> {
     }
 
     @Override
+    public void restoreLast(Object last) {
+      _lastAutoNumber = null;
+    }
+    
+    @Override
     public DataType getType() {
       return DataType.GUID;
     }
@@ -2067,6 +2084,14 @@ public class ColumnImpl implements Column, Comparable<ColumnImpl> {
     }
 
     @Override
+    public void restoreLast(Object last) {
+      if(last instanceof ComplexValueForeignKey) {
+        getTable().restoreLastComplexTypeAutoNumber(
+            ((ComplexValueForeignKey)last).get());
+      }
+    }
+    
+    @Override
     public DataType getType() {
       return DataType.COMPLEX_TYPE;
     }
@@ -2091,6 +2116,11 @@ public class ColumnImpl implements Column, Comparable<ColumnImpl> {
     }
 
     @Override
+    public void restoreLast(Object last) {
+      throw new UnsupportedOperationException();
+    }
+    
+    @Override
     public DataType getType() {
       return _genType;
     }