svn commit: r908096 - /incubator/clerezza/trunk/org.apache.clerezza.parent/org.apache.clerezza.webapp.parent/org.apache.clerezza.platform.security/src/main/java/org/apache/clerezza/platform/security/UserUtil.java

[it...@apache.org]

Author: ito
Date: Tue Feb  9 16:11:13 2010
New Revision: 908096

URL: http://svn.apache.org/viewvc?rev=908096&view=rev
Log:
CLEREZZA-110: provide method for retrieving current subjects name

Added:
    incubator/clerezza/trunk/org.apache.clerezza.parent/org.apache.clerezza.webapp.parent/org.apache.clerezza.platform.security/src/main/java/org/apache/clerezza/platform/security/UserUtil.java

Added: incubator/clerezza/trunk/org.apache.clerezza.parent/org.apache.clerezza.webapp.parent/org.apache.clerezza.platform.security/src/main/java/org/apache/clerezza/platform/security/UserUtil.java
URL: http://svn.apache.org/viewvc/incubator/clerezza/trunk/org.apache.clerezza.parent/org.apache.clerezza.webapp.parent/org.apache.clerezza.platform.security/src/main/java/org/apache/clerezza/platform/security/UserUtil.java?rev=908096&view=auto
==============================================================================
--- incubator/clerezza/trunk/org.apache.clerezza.parent/org.apache.clerezza.webapp.parent/org.apache.clerezza.platform.security/src/main/java/org/apache/clerezza/platform/security/UserUtil.java (added)
+++ incubator/clerezza/trunk/org.apache.clerezza.parent/org.apache.clerezza.webapp.parent/org.apache.clerezza.platform.security/src/main/java/org/apache/clerezza/platform/security/UserUtil.java Tue Feb  9 16:11:13 2010
@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.clerezza.platform.security;
+
+import java.security.AccessControlContext;
+import java.security.AccessController;
+import java.security.Principal;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.util.Iterator;
+import javax.security.auth.Subject;
+
+/**
+ * Utility methods for retrieving user information.
+ *
+ *
+ * @author mir, tio
+ */
+public class UserUtil {
+
+	/**
+	 *
+	 * @return the name of user which is associated to the current thread
+	 */
+	public static String getCurrentUserName() {
+		Subject subject;
+		final AccessControlContext context = AccessController.getContext();
+		try {
+			subject = AccessController.doPrivileged(new PrivilegedExceptionAction<Subject>() {
+
+				@Override
+				public Subject run() throws Exception {
+					return Subject.getSubject(context);
+				}
+			});
+		} catch (PrivilegedActionException ex) {
+			Exception cause = (Exception)ex.getCause();
+			if (cause instanceof RuntimeException) {
+				throw (RuntimeException) cause;
+			}
+			throw new RuntimeException(cause);
+		}
+		Iterator<Principal> iter = subject.getPrincipals().iterator();
+		String name = null;
+		if (iter.hasNext()) {
+				name = iter.next().getName();
+		}
+		return name;
+	}
+}