Add support for filtering by product attributes

Author: anithakathir

src/main/java/com/indix/query/SearchQuery.java

@@ -54,6 +54,16 @@ public SearchQuery withCategoryId(List<Integer> categoryId) {
         return this;
     }
 
+    /**
+     * Combined with any of query/brand/category/store, limits results to products with specific attribute values
+     */
+    public SearchQuery withAttrFilter(String attrFilterKey, List<String> attrFilterValues) {
+        for (String attrValue: attrFilterValues) {
+            parameters.add(new BasicNameValuePair(attrFilterKey, attrValue));
+        }
+        return this;
+    }
+
     /**
      * Combined with end_price, limits results to products sold by at least one store at a price between start and end
      */

src/test/java/com/indix/query/SearchQueryTest.java

@@ -41,6 +41,9 @@ public void testBasicQuery() {
         expectedValue.add(new BasicNameValuePair("sortBy", "PRICE_HIGH_TO_LOW"));
         expectedValue.add(new BasicNameValuePair("facetBy", "storeId"));
         expectedValue.add(new BasicNameValuePair("facetBy", "brandId"));
+        expectedValue.add(new BasicNameValuePair("attr.color", "black"));
+        expectedValue.add(new BasicNameValuePair("attr.color", "red"));
+        expectedValue.add(new BasicNameValuePair("attr.size", "xs"));
         expectedValue.add(new BasicNameValuePair("pageNumber", "5"));
         expectedValue.add(new BasicNameValuePair("pageSize", "55"));
 
@@ -52,6 +55,8 @@ public void testBasicQuery() {
                 .withSku("sku1")
                 .withSortBy(SearchQuery.SortBy.PRICE_HIGH_TO_LOW)
                 .withFacetBy(Arrays.asList("storeId", "brandId"))
+                .withAttrFilter("attr.color", Arrays.asList("black", "red"))
+                .withAttrFilter("attr.size", Arrays.asList("xs"))
                 .withPageNumber(5)
                 .withPageSize(55)
                 .withCountryCode("US")