support attribute filter & max distance in tvsscan;support max distance in knnsearch

Link: https://code.alibaba-inc.com/tair3.0/tairjedis-sdk/codereview/13305901
* support attribute filter & max distance in tvsscan;support max distance in knnsearch

Author: seth-hg

src/main/java/com/aliyun/tair/tairvector/params/DistanceMethod.java

@@ -3,5 +3,6 @@
 public enum DistanceMethod {
     L2,
     IP,
-    JACCARD
+    JACCARD,
+    COSINE,
 }

src/main/java/com/aliyun/tair/tairvector/params/HscanParams.java

@@ -1,5 +1,8 @@
 package com.aliyun.tair.tairvector.params;
 
+import redis.clients.jedis.Protocol;
+import redis.clients.jedis.util.SafeEncoder;
+
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.Collection;
@@ -9,14 +12,12 @@
 import java.util.List;
 import java.util.Map;
 
-import redis.clients.jedis.Protocol;
-import redis.clients.jedis.util.SafeEncoder;
-
-
 public class HscanParams {
     private final static String MATCH = "MATCH";
     private final static String COUNT = "COUNT";
-    private final static String NOVAL = "NOVAL";
+    private final static String VECTOR = "VECTOR";
+    private final static String MAX_DIST = "MAX_DIST";
+    private final static String FILTER = "FILTER";
 
     private final Map<String, ByteBuffer> params = new HashMap<>();
     public static final String SCAN_POINTER_START = String.valueOf(0);
@@ -40,35 +41,49 @@ public HscanParams count(Integer count) {
         return this;
     }
 
-    public HscanParams noval( ) {
-        this.params.put(NOVAL, null);
+    public HscanParams vector(byte[] vector) {
+        this.params.put(VECTOR, ByteBuffer.wrap(vector));
+        return this;
+    }
+
+    public HscanParams vector(String vector) {
+        this.params.put(VECTOR, ByteBuffer.wrap(SafeEncoder.encode(vector)));
+        return this;
+    }
+
+    public HscanParams max_dist(float max_dist) {
+        this.params.put(MAX_DIST, ByteBuffer.wrap(Protocol.toByteArray(max_dist)));
+        return this;
+    }
+
+    public HscanParams filter(String filter) {
+        this.params.put(FILTER, ByteBuffer.wrap(SafeEncoder.encode(filter)));
         return this;
     }
 
     public Collection<byte[]> getParams() {
         List<byte[]> paramsList = new ArrayList(this.params.size());
         Iterator var2 = this.params.entrySet().iterator();
 
-        while(var2.hasNext()) {
-            Map.Entry<String, ByteBuffer> param = (Map.Entry)var2.next();
+        while (var2.hasNext()) {
+            Map.Entry<String, ByteBuffer> param = (Map.Entry) var2.next();
             paramsList.add(SafeEncoder.encode(param.getKey()));
-            if (param.getKey().equals(NOVAL)) continue;
             paramsList.add((param.getValue()).array());
         }
 
         return Collections.unmodifiableCollection(paramsList);
     }
 
     byte[] binaryMatch() {
-        return this.params.containsKey(MATCH) ? ((ByteBuffer)this.params.get(MATCH)).array() : null;
+        return this.params.containsKey(MATCH) ? ((ByteBuffer) this.params.get(MATCH)).array() : null;
     }
 
     String match() {
-        return this.params.containsKey(MATCH) ? new String(((ByteBuffer)this.params.get(MATCH)).array()) : null;
+        return this.params.containsKey(MATCH) ? new String(((ByteBuffer) this.params.get(MATCH)).array()) : null;
     }
 
     Integer count() {
-        return this.params.containsKey(COUNT) ? ((ByteBuffer)this.params.get(COUNT)).getInt() : null;
+        return this.params.containsKey(COUNT) ? ((ByteBuffer) this.params.get(COUNT)).getInt() : null;
     }
 
     static {