Add first part of a persistent map implementation.

block-storage/src/test/java/org/lucares/pdb/map/NodeEntryTest.java

@@ -0,0 +1,32 @@
+package org.lucares.pdb.map;
+
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.lucares.pdb.map.NodeEntry.ValueType;
+import org.testng.Assert;
+import org.testng.annotations.Test;
+
+@Test
+public class NodeEntryTest {
+	public void serializeDeserialize() throws Exception {
+
+		final List<NodeEntry> entries = new ArrayList<>();
+		entries.add(newNode(ValueType.NODE_POINTER, "key1", "value1"));
+		entries.add(newNode(ValueType.VALUE_INLINE, "key2_", "value2--"));
+		entries.add(newNode(ValueType.NODE_POINTER, "key3__", "value3---"));
+		entries.add(newNode(ValueType.VALUE_INLINE, "key4___", "value4----"));
+
+		final byte[] buffer = NodeEntry.serialize(entries);
+
+		final List<NodeEntry> actualEntries = NodeEntry.deserialize(buffer);
+
+		Assert.assertEquals(actualEntries, entries);
+	}
+
+	private static NodeEntry newNode(final ValueType type, final String key, final String value) {
+		return new NodeEntry(ValueType.VALUE_INLINE, key.getBytes(StandardCharsets.UTF_8),
+				value.getBytes(StandardCharsets.UTF_8));
+	}
+}

block-storage/src/test/java/org/lucares/pdb/map/PersistentMapTest.java

@@ -0,0 +1,38 @@
+package org.lucares.pdb.map;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import org.lucares.pdb.diskstorage.DiskStorage;
+import org.lucares.utils.file.FileUtils;
+import org.testng.annotations.AfterMethod;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+@Test
+public class PersistentMapTest {
+
+	private Path dataDirectory;
+
+	@BeforeMethod
+	public void beforeMethod() throws IOException {
+		dataDirectory = Files.createTempDirectory("pdb");
+	}
+
+	@AfterMethod
+	public void afterMethod() throws IOException {
+		FileUtils.delete(dataDirectory);
+	}
+
+	public void test() throws Exception {
+		final Path file = dataDirectory.resolve("map.db");
+
+		try (final DiskStorage ds = new DiskStorage(file)) {
+			final PersistentMap map = new PersistentMap(ds);
+
+			map.put("key1", "value1");
+			map.getAsString("key1");
+		}
+	}
+}