Update maps in ASAtoms to synchronized maps

veraPDF · Nov 15, 2024 · 2fd9eff · 2fd9eff
1 parent b6e14aa
commit 2fd9eff
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/main/java/org/verapdf/as/ASAtom.java b/src/main/java/org/verapdf/as/ASAtom.java
@@ -22,6 +22,7 @@
 
 import org.verapdf.cos.filters.COSFilterASCIIHexEncode;
 
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Objects;
@@ -34,8 +35,8 @@
  */
 public class ASAtom implements Comparable<ASAtom> {
 
-    private static final Map<String, ASAtom> PREDEFINED_PDF_NAMES = new HashMap<>();
-    private static final Map<String, ASAtom> CACHED_PDF_NAMES = new HashMap<>();
+    private static final Map<String, ASAtom> PREDEFINED_PDF_NAMES = Collections.synchronizedMap(new HashMap<>());
+    private static final Map<String, ASAtom> CACHED_PDF_NAMES = Collections.synchronizedMap(new HashMap<>());
 
     // 3
     public static final ASAtom key3D = new ASAtom("3D");