Merge remote-tracking branch 'origin/enhancement/#838-Filterable-Attributes-Methods' into enhancement/#838-Filterable-Attributes-Methods

Author: Noah-Mack-01

src/main/java/com/meilisearch/sdk/model/FilterableAttribute.java

@@ -42,19 +42,20 @@ public FilterableAttribute(String[] patterns) {
     }
 
     public FilterableAttribute(
-            String[] patterns, boolean facetSearch, Map<String, Boolean> filters) {
-        if (patterns == null) throw new IllegalArgumentException("Patterns cannot be null");
-        boolean patternHasGeo = false;
-        for (String s : patterns)
-            if (_GEO.equals(s)) {
-                patternHasGeo = true;
-                break;
-            }
-        if (patternHasGeo) checkGeoValidation(facetSearch, filters);
-        this.patterns = patterns;
-        this.facetSearch = facetSearch;
-        this.filter = filters;
-    }
+public FilterableAttribute(String[] patterns, boolean facetSearch, Map<String, Boolean> filters) {
+    if (patterns == null) throw new IllegalArgumentException("Patterns cannot be null");
+    if (filters == null)  throw new IllegalArgumentException("Filters cannot be null");
+    boolean patternHasGeo = false;
+    for (String s : patterns)
+        if (_GEO.equals(s)) {
+            patternHasGeo = true;
+            break;
+        }
+    if (patternHasGeo) checkGeoValidation(facetSearch, filters);
+    this.patterns  = Arrays.copyOf(patterns, patterns.length); // defensive copy
+    this.facetSearch = facetSearch;
+    this.filter    = new HashMap<>(filters);                   // defensive copy
+}
 
     private static void checkGeoValidation(boolean facetSearch, Map<String, Boolean> filters) {
         String[] errors = new String[3];