Add custom exception for adding duplicate fields

[Sone.git] / src / main / java / net / pterodactylus / sone / data / Profile.java

diff --git a/src/main/java/net/pterodactylus/sone/data/Profile.java b/src/main/java/net/pterodactylus/sone/data/Profile.java
index 4bf26cc..1f80248 100644 (file)
--- a/src/main/java/net/pterodactylus/sone/data/Profile.java
+++ b/src/main/java/net/pterodactylus/sone/data/Profile.java
@@ -326,7 +326,9 @@ public class Profile implements Fingerprintable {
        public Field addField(String fieldName) throws IllegalArgumentException {
                checkNotNull(fieldName, "fieldName must not be null");
                checkArgument(fieldName.length() > 0, "fieldName must not be empty");
-               checkArgument(getFieldByName(fieldName) == null, "fieldName must be unique");
+               if (getFieldByName(fieldName) != null) {
+                       throw new DuplicateField();
+               }
                @SuppressWarnings("synthetic-access")
                Field field = new Field().setName(fieldName);
                fields.add(field);
@@ -553,4 +555,11 @@ public class Profile implements Fingerprintable {
 
        }
 
+       /**
+        * Exception that signals the addition of a field that already exists.
+        *
+        * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+        */
+       public static class DuplicateField extends IllegalArgumentException { }
+
 }