Introduce system roles

[lgpl/argeo-commons.git] / org.argeo.cms / src / org / argeo / cms / auth / CurrentUser.java

diff --git a/org.argeo.cms/src/org/argeo/cms/auth/CurrentUser.java b/org.argeo.cms/src/org/argeo/cms/auth/CurrentUser.java
index cbe4286921c527651e928eebc552d610d745f90e..16ac638c107a943422e84a059b0a79414f68e54f 100644 (file)
--- a/org.argeo.cms/src/org/argeo/cms/auth/CurrentUser.java
+++ b/org.argeo.cms/src/org/argeo/cms/auth/CurrentUser.java
@@ -6,9 +6,12 @@ import java.security.PrivilegedAction;
 import java.security.PrivilegedActionException;
 import java.security.PrivilegedExceptionAction;
 import java.util.HashSet;
+import java.util.Iterator;
 import java.util.Locale;
 import java.util.Set;
 import java.util.UUID;
+import java.util.concurrent.Callable;
+import java.util.concurrent.CompletionException;
 
 import javax.security.auth.Subject;
 import javax.security.auth.x500.X500Principal;
@@ -68,6 +71,11 @@ public final class CurrentUser {
                return roles.contains(role);
        }
 
+       /** Implies this {@link SystemRole} in this context. */
+       public final static boolean implies(SystemRole role, String context) {
+               return role.implied(currentSubject(), context);
+       }
+
        /** Executes as the current user */
        public final static <T> T doAs(PrivilegedAction<T> action) {
                return Subject.doAs(currentSubject(), action);
@@ -123,7 +131,12 @@ public final class CurrentUser {
 
        public static CmsSession getCmsSession() {
                Subject subject = currentSubject();
-               CmsSessionId cmsSessionId = subject.getPrivateCredentials(CmsSessionId.class).iterator().next();
+               Iterator<CmsSessionId> it = subject.getPrivateCredentials(CmsSessionId.class).iterator();
+               if (!it.hasNext())
+                       throw new IllegalStateException("No CMS session id available for " + subject);
+               CmsSessionId cmsSessionId = it.next();
+               if (it.hasNext())
+                       throw new IllegalStateException("More than one CMS session id available for " + subject);
                return CmsContextImpl.getCmsContext().getCmsSessionByUuid(cmsSessionId.getUuid());
        }
 
@@ -162,6 +175,29 @@ public final class CurrentUser {
                return true;
        }
 
+       /*
+        * PREPARE EVOLUTION OF JAVA APIs INTRODUCED IN JDK 18 The following static
+        * methods will be added to Subject
+        */
+       public Subject current() {
+               return currentSubject();
+       }
+
+       public static <T> T callAs(Subject subject, Callable<T> action) {
+               try {
+                       return Subject.doAs(subject, new PrivilegedExceptionAction<T>() {
+
+                               @Override
+                               public T run() throws Exception {
+                                       return action.call();
+                               }
+
+                       });
+               } catch (PrivilegedActionException e) {
+                       throw new CompletionException("Failed to execute action for " + subject, e.getCause());
+               }
+       }
+
        private CurrentUser() {
        }
 }