Provide memory-mapped long-id unique index

dump/src/util/dump/Dump.java

@@ -49,7 +49,7 @@
 import gnu.trove.list.array.TByteArrayList;
 import gnu.trove.set.hash.TLongHashSet;
 import util.dump.ExternalizableBean.externalizationVersion;
-import util.dump.UniqueIndex.DuplicateKeyException;
+import util.dump.UniqueConstraint.DuplicateKeyException;
 import util.dump.cache.SoftLRUCache;
 import util.dump.io.IOUtils;
 import util.dump.sort.InfiniteSorter;

dump/src/util/dump/ExternalizableBean.java

@@ -792,7 +792,7 @@ default void readExternal( ObjectInput in ) throws IOException, ClassNotFoundExc
                if ( f != null ) {
                   f.set(this, o);
                }
-               //               throw new IllegalArgumentException("The field type " + fieldTypes[i] + " in class " + getClass()
+               //               throw new IllegalArgumentException("The field type " + fieldTypes[i] + " in " + getClass()
                //                  + " is unsupported by util.dump.ExternalizableBean.");
             }
             }
@@ -802,7 +802,7 @@ default void readExternal( ObjectInput in ) throws IOException, ClassNotFoundExc
          throw e;
       }
       catch ( Throwable e ) {
-         throw new RuntimeException("Failed to read externalized instance. Maybe the field order was changed? class " + getClass(), e);
+         throw new RuntimeException("Failed to read externalized instance. Maybe the field order was changed? " + getClass(), e);
       }
    }
 

dump/src/util/dump/GroupedIndex.java

@@ -3,7 +3,7 @@
 import java.util.Iterator;
 import java.util.NoSuchElementException;
 
-import util.dump.UniqueIndex.DuplicateKeyException;
+import util.dump.UniqueConstraint.DuplicateKeyException;
 import util.dump.reflection.FieldAccessor;