Resolve "Die Statistiken sollten auch in ElasticSearch hinterlegt werden."

Related to #384 (closed)

src/main/java/at/ac/uibk/gitsearch/security/oauth2/GitSearchOAuth2AuthenticationToken.java

 package at.ac.uibk.gitsearch.security.oauth2;
 
+import java.util.Collection;
 import java.util.Objects;
+import org.springframework.security.core.GrantedAuthority;
 import org.springframework.security.oauth2.client.authentication.OAuth2AuthenticationToken;
 import org.springframework.security.oauth2.client.authentication.OAuth2LoginAuthenticationToken;
 
@@ -33,7 +35,26 @@ public class GitSearchOAuth2AuthenticationToken extends OAuth2AuthenticationToke
     @Override
     public int hashCode() {
         final int prime = 31;
-        int result = super.hashCode();
+        int code = 31;
+        final Collection<GrantedAuthority> authorities = this.getAuthorities();
+        if (authorities != null) {
+            for (GrantedAuthority authority : authorities) {
+                code ^= authority.hashCode();
+            }
+        }
+        if (this.getPrincipal() != null) {
+            code ^= this.getPrincipal().hashCode();
+        }
+        if (this.getCredentials() != null) {
+            code ^= this.getCredentials().hashCode();
+        }
+        if (this.getDetails() != null) {
+            code ^= this.getDetails().hashCode();
+        }
+        if (this.isAuthenticated()) {
+            code ^= -37;
+        }
+        int result = code;
         result = prime * result + Objects.hash(redirectURL);
         return result;
     }
@@ -43,13 +64,18 @@ public class GitSearchOAuth2AuthenticationToken extends OAuth2AuthenticationToke
         if (this == obj) {
             return true;
         }
-        if (!super.equals(obj)) {
+        if (obj == null) return false;
+
+        if (!getClass().isAssignableFrom(obj.getClass())) {
             return false;
         }
-        if (getClass() != obj.getClass()) {
+        GitSearchOAuth2AuthenticationToken other = (GitSearchOAuth2AuthenticationToken) obj;
+        if (this.getAuthorities() == null) {
+            return other.getAuthorities() == null;
+        }
+        if (!super.equals(obj)) {
             return false;
         }
-        GitSearchOAuth2AuthenticationToken other = (GitSearchOAuth2AuthenticationToken) obj;
         return Objects.equals(redirectURL, other.redirectURL);
     }
 }