Support loading mmapable indices by path
Change-Id: Iaaeb8dc987c3da4b3f72e84535dce975a22444cf
diff --git a/src/main/java/de/ids_mannheim/korap/KrillIndex.java b/src/main/java/de/ids_mannheim/korap/KrillIndex.java
index e19ebd1..2210167 100644
--- a/src/main/java/de/ids_mannheim/korap/KrillIndex.java
+++ b/src/main/java/de/ids_mannheim/korap/KrillIndex.java
@@ -3,6 +3,7 @@
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
+import java.nio.file.Path;
import java.time.LocalDate;
// Java core classes
import java.util.ArrayList;
@@ -44,6 +45,7 @@
import org.apache.lucene.search.spans.Spans;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
+import org.apache.lucene.store.MMapDirectory;
import org.apache.lucene.util.Bits;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.FixedBitSet;
@@ -225,6 +227,19 @@
/**
+ * Constructs a new KrillIndex bound to a persistant index,
+ * that will be lifted as an mmap.
+ *
+ * @param path
+ * A path pointing to an mmapable index
+ * @throws IOException
+ */
+ public KrillIndex (Path path) throws IOException {
+ this.directory = new MMapDirectory(path);
+ };
+
+
+ /**
* Get the version number of the index.
*
* @return A string containing the version number.