DOC-5110 added hash search examples (#4151)

* DOC-5110 added hash search examples

* Java 8 compatibility

---------

Co-authored-by: ggivo <[email protected]>

Author: andy-stark-redis

src/test/java/io/redis/examples/HomeJsonExample.java

@@ -3,7 +3,8 @@
 package io.redis.examples;
 
 import org.junit.jupiter.api.Test;
-
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 // REMOVE_END
 // STEP_START import
 import redis.clients.jedis.UnifiedJedis;
@@ -13,10 +14,10 @@
 import redis.clients.jedis.search.aggr.*;
 import redis.clients.jedis.search.schemafields.*;
 import org.json.JSONObject;
-import java.util.List;
 
-import static org.junit.jupiter.api.Assertions.assertArrayEquals;
-import static org.junit.jupiter.api.Assertions.assertEquals;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 // STEP_END
 
 // HIDE_START
@@ -32,7 +33,8 @@ public void run() {
         //REMOVE_START
         // Clear the indexes and keys here before using them in tests.
         try {jedis.ftDropIndex("idx:users");} catch (JedisDataException j){}
-        jedis.del("bike", "bike:1", "crashes", "newbike", "riders", "bikes:inventory");
+        try {jedis.ftDropIndex("hash-idx:users");} catch (JedisDataException j){}
+        jedis.del("user:1", "user:2", "user:3", "huser:1", "huser:2", "huser:3");
         //REMOVE_END
 
         // STEP_START create_data
@@ -135,10 +137,8 @@ public void run() {
         System.out.println(aggResult.getTotalResults()); // >>> 2
 
         for (Row cityRow: aggResult.getRows()) {
-            System.out.println(String.format(
-                "%s - %d",
-                cityRow.getString("city"), cityRow.getLong("count"))
-            );
+            System.out.printf("%s - %d%n",
+                cityRow.getString("city"), cityRow.getLong("count"));
         }
         // >>> London - 1
         // >>> Tel Aviv - 2
@@ -151,6 +151,78 @@ public void run() {
                     .sorted().toArray());
         // REMOVE_END
 
+        // STEP_START make_hash_index
+        SchemaField[] hashSchema = {
+            TextField.of("name"),
+            TextField.of("city"),
+            NumericField.of("age")
+        };
+
+        String hashCreateResult = jedis.ftCreate("hash-idx:users",
+            FTCreateParams.createParams()
+                .on(IndexDataType.HASH)
+                .addPrefix("huser:"),
+                hashSchema
+        );
+
+        System.out.println(hashCreateResult); // >>> OK
+        // STEP_END
+        // REMOVE_START
+        assertEquals("OK", hashCreateResult);
+        // REMOVE_END
+
+        // STEP_START add_hash_data
+        Map<String, String> user1Info = new HashMap<>();
+        user1Info.put("name", "Paul John");
+        user1Info.put("email", "[email protected]");
+        user1Info.put("age", "42");
+        user1Info.put("city", "London");
+        long huser1Set = jedis.hset("huser:1", user1Info);
+        
+        System.out.println(huser1Set); // >>> 4
+
+        Map<String, String> user2Info = new HashMap<>();
+        user2Info.put("name", "Eden Zamir");
+        user2Info.put("email", "[email protected]");
+        user2Info.put("age", "29");
+        user2Info.put("city", "Tel Aviv");
+        long huser2Set = jedis.hset("huser:2", user2Info);
+        
+        System.out.println(huser2Set); // >>> 4
+
+        Map<String, String> user3Info = new HashMap<>();
+        user3Info.put("name", "Paul Zamir");
+        user3Info.put("email", "[email protected]");
+        user3Info.put("age", "35");
+        user3Info.put("city", "Tel Aviv");
+        long huser3Set = jedis.hset("huser:3", user3Info);
+        
+        System.out.println(huser3Set); // >>> 4
+        // STEP_END
+        // REMOVE_START
+        assertEquals(4, huser1Set);
+        assertEquals(4, huser2Set);
+        assertEquals(4, huser3Set);
+        // REMOVE_END
+        
+        // STEP_START query1_hash
+        SearchResult findPaulHashResult = jedis.ftSearch("hash-idx:users",
+             "Paul @age:[30 40]"
+        );
+        
+        System.out.println(findPaulHashResult.getTotalResults()); // >>> 1
+
+        List<Document> paulHashDocs = findPaulHashResult.getDocuments();
+
+        for (Document doc: paulHashDocs) {
+            System.out.println(doc.getId());
+        }
+        // >>> user:3
+        // STEP_END
+        // REMOVE_START
+        assertEquals("huser:3", paulHashDocs.get(0).getId());
+        // REMOVE_END
+
 // HIDE_START
         jedis.close();
     }