Implement PreferTag#hashCode()

Resolves: https://jira.duraspace.org/browse/FCREPO-1307
fcrepo · Feb 19, 2015 · c2e1af0 · c2e1af0
1 parent bb6072d
commit c2e1af0
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Showing 2 changed files with 35 additions and 4 deletions.
diff --git a/fcrepo-http-commons/src/main/java/org/fcrepo/http/commons/domain/PreferTag.java b/fcrepo-http-commons/src/main/java/org/fcrepo/http/commons/domain/PreferTag.java
@@ -146,4 +146,13 @@ public boolean equals(final Object obj) {
             return false;
         }
     }
+
+    @Override
+    public int hashCode() {
+        if (getTag() == null) {
+            return 0;
+        }
+
+        return getTag().hashCode();
+    }
 }
diff --git a/fcrepo-http-commons/src/test/java/org/fcrepo/http/commons/domain/PreferTagTest.java b/fcrepo-http-commons/src/test/java/org/fcrepo/http/commons/domain/PreferTagTest.java
@@ -15,14 +15,15 @@
  */
 package org.fcrepo.http.commons.domain;
 
-import org.junit.Test;
-
-import java.text.ParseException;
-
+import static org.fcrepo.kernel.RdfLexicon.LDP_NAMESPACE;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
+import java.text.ParseException;
+
+import org.junit.Test;
+
 /**
  * @author cabeer
  */
@@ -48,4 +49,25 @@ public void testEquals() throws ParseException {
         assertFalse(preferTag1.equals(null));
         assertFalse(preferTag1.equals("some string"));
     }
+
+    @Test
+    public void testHashCode() throws ParseException {
+        doTestHashCode(new PreferTag("handling=lenient; received=\"minimal\""),
+                new PreferTag("handling=lenient; received=\"minimal\""),
+                true);
+
+        doTestHashCode(new PreferTag("handling=lenient; received=\"minimal\""),
+                new PreferTag("return=representation; include=\"" + LDP_NAMESPACE + "PreferMinimalContainer\""),
+                false);
+
+        doTestHashCode(new PreferTag("handling=lenient; received=\"minimal\""),
+                PreferTag.emptyTag(),
+                false);
+    }
+
+    private void doTestHashCode(final PreferTag tag0, final PreferTag tag1, final boolean expectEqual)    {
+        assertEquals(expectEqual, tag0.equals(tag1));
+        assertEquals(expectEqual, tag0.hashCode() == tag1.hashCode());
+    }
+
 }