implement comparable for indexconfig

build.gradle

@@ -5,7 +5,7 @@ plugins {
 }
 
 group = 'com.nucleodb'
-version = '1.13.4'
+version = '1.13.5'
 
 repositories {
     mavenCentral()

src/main/java/com/nucleodb/library/database/index/IndexWrapper.java

@@ -6,6 +6,7 @@
 import com.nucleodb.library.database.index.trie.Entry;
 import com.nucleodb.library.database.tables.table.DataEntry;
 import com.nucleodb.library.database.utils.exceptions.InvalidIndexTypeException;
+import org.jetbrains.annotations.NotNull;
 
 import java.beans.IntrospectionException;
 import java.beans.PropertyDescriptor;
@@ -18,7 +19,7 @@
 import java.util.Queue;
 import java.util.Set;
 
-public abstract class IndexWrapper<T> implements Serializable{
+public abstract class IndexWrapper<T> implements Serializable, Comparable{
   private static final long serialVersionUID = 1;
   String indexedKeyStr;
   public IndexWrapper(String indexedKey) {
@@ -140,4 +141,12 @@ public Set<T> greaterThan(Object searchObj)  {
   public Set<T> greaterThanEqual(Object searchObj)  {
     return (Set<T>) Sets.newTreeSet();
   }
+
+  @Override
+  public int compareTo(@NotNull Object o) {
+    if(o instanceof IndexWrapper) {
+      return indexedKeyStr.compareTo(((IndexWrapper<?>) o).getIndexedKey());
+    }
+    return 0;
+  }
 }

src/main/java/com/nucleodb/library/database/index/TrieIndex.java

@@ -252,4 +252,5 @@ public List<Entry> startsWithInternal(String findString) {
     return tmp.getPartialEntries().stream().collect(Collectors.toList());
   }
 
+
 }

src/main/java/com/nucleodb/library/database/tables/table/DataTableConfig.java

@@ -3,6 +3,7 @@
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.nucleodb.library.database.index.IndexWrapper;
 import com.nucleodb.library.database.utils.StartupRun;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.Serializable;
 import java.time.Instant;
@@ -14,7 +15,7 @@
 public class DataTableConfig implements Serializable{
   private static final long serialVersionUID = 4416983891804575837L;
 
-  public static class IndexConfig {
+  public static class IndexConfig implements Comparable {
     String name;
     Class<? extends IndexWrapper> indexType;
 
@@ -38,6 +39,14 @@ public Class<? extends IndexWrapper> getIndexType() {
     public void setIndexType(Class<? extends IndexWrapper> indexType) {
       this.indexType = indexType;
     }
+
+    @Override
+    public int compareTo(@NotNull Object o) {
+      if(o instanceof IndexConfig){
+        return this.getName().compareTo(((IndexConfig) o).getName());
+      }
+      return 0;
+    }
   }
   String bootstrap = "127.0.0.1:19092";
   String table;