Lift containsElement condition restrictions, must work with flex maps.

Author: greenrobot-team

objectbox-java/src/main/java/io/objectbox/Property.java

@@ -443,27 +443,19 @@ private void checkNotStringArray() {
     }
 
     /**
-     * For a String array property, matches if at least one element equals the given value
+     * For a String array or String-key map property, matches if at least one element equals the given value
      * using {@link StringOrder#CASE_SENSITIVE StringOrder#CASE_SENSITIVE}.
      *
      * @see #containsElement(String, StringOrder)
      */
     public PropertyQueryCondition<ENTITY> containsElement(String value) {
-        checkIsStringArray();
         return new StringCondition<>(this, Operation.CONTAINS_ELEMENT, value);
     }
 
     public PropertyQueryCondition<ENTITY> containsElement(String value, StringOrder order) {
-        checkIsStringArray();
         return new StringCondition<>(this, Operation.CONTAINS_ELEMENT, value, order);
     }
 
-    private void checkIsStringArray() {
-        if (String[].class != type) {
-            throw new IllegalArgumentException("containsElement is only supported for String[] properties.");
-        }
-    }
-
     /**
      * For a String-key map property, matches if at least one key and value combination equals the given values
      * using {@link StringOrder#CASE_SENSITIVE StringOrder#CASE_SENSITIVE}.

objectbox-java/src/main/java/io/objectbox/query/QueryBuilder.java

@@ -771,12 +771,9 @@ public QueryBuilder<T> contains(Property<T> property, String value, StringOrder
     }
 
     /**
-     * For a String array property, matches if at least one element equals the given value.
+     * For a String array or String-key map property, matches if at least one element equals the given value.
      */
     public QueryBuilder<T> containsElement(Property<T> property, String value, StringOrder order) {
-        if (String[].class != property.type) {
-            throw new IllegalArgumentException("containsElement is only supported for String[] properties.");
-        }
         verifyHandle();
         checkCombineCondition(nativeContainsElement(handle, property.getId(), value, order == StringOrder.CASE_SENSITIVE));
         return this;