utility method convert vectors

Author: l-trotta

java-client/src/main/java/co/elastic/clients/util/VectorDocumentUtility.java

@@ -0,0 +1,34 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package co.elastic.clients.util;
+
+import java.nio.ByteBuffer;
+import java.util.Base64;
+
+
+public class VectorDocumentUtility {
+    public static String convertVectorToBase64String(Float[] vec) {
+        ByteBuffer buff = ByteBuffer.allocate(Float.BYTES * vec.length);
+        for (int i = 0; i < vec.length; i++) {
+            buff.putFloat(vec[i]);
+        }
+        return Base64.getEncoder().encodeToString(buff.array());
+    }
+}