Support for Full Text Search (parse-community#772)

Author: dplewis

Parse/src/main/java/com/parse/ParseQuery.java

@@ -480,6 +480,14 @@ public Builder<T> whereGeoIntersects(String key, ParseGeoPoint point) {
         return addCondition(key, "$geoIntersects", dictionary);
       }
 
+      public Builder<T> whereText(String key, String value) {
+        Map<String, String> termDictionary = new HashMap<>();
+        Map<String, Map<String, String>> searchDictionary = new HashMap<>();
+        termDictionary.put("$term", value);
+        searchDictionary.put("$search", termDictionary);
+        return addCondition(key, "$text", searchDictionary);
+      }
+
       public Builder<T> addCondition(String key, String condition,
           Collection<? extends Object> value) {
         return addConditionInternal(key, condition, Collections.unmodifiableCollection(value));
@@ -1683,6 +1691,23 @@ public ParseQuery<T> whereContainsAll(String key, Collection<?> values) {
     return this;
   }
 
+    /**
+   * Adds a constraint for finding string values that contain a provided
+   * string using Full Text Search
+   *
+   * Requires [email protected]
+   *
+   * @param key
+   *          The key to be constrained.
+   * @param text
+   *          String to be searched
+   * @return this, so you can chain this call.
+   */
+  public ParseQuery<T> whereFullText(String key, String text) {
+    builder.whereText(key, text);
+    return this;
+  }
+
   /**
    * Add a constraint to the query that requires a particular key's value match another
    * {@code ParseQuery}.

Parse/src/test/java/com/parse/ParseQueryTest.java

@@ -363,6 +363,22 @@ public void testWhereContainedIn() throws Exception {
     verifyCondition(query, "key", "$in", values);
   }
 
+  @Test
+  public void testWhereFullText() throws Exception {
+    ParseQuery<ParseObject> query = new ParseQuery<>("Test");
+    String text = "TestString";
+    query.whereFullText("key", text);
+
+    // We generate a state to verify the content of the builder
+    ParseQuery.State state = query.getBuilder().build();
+    ParseQuery.QueryConstraints queryConstraints = state.constraints();
+    ParseQuery.KeyConstraints keyConstraints = (ParseQuery.KeyConstraints) queryConstraints.get("key");
+    Map searchDictionary = (Map) keyConstraints.get("$text");
+    Map termDictionary = (Map) searchDictionary.get("$search");
+    String value = (String) termDictionary.get("$term");
+    assertEquals(value, text);
+  }
+
   @Test
   public void testWhereContainsAll() throws Exception {
     ParseQuery<ParseObject> query = new ParseQuery<>("Test");