Major refactoring of Argeo CMS UI

[lgpl/argeo-commons.git] / org.argeo.cms / src / org / argeo / cms / osgi / CmsOsgiUtils.java

diff --git a/org.argeo.cms/src/org/argeo/cms/osgi/CmsOsgiUtils.java b/org.argeo.cms/src/org/argeo/cms/osgi/CmsOsgiUtils.java
new file mode 100644 (file)
index 0000000..424d62f
--- /dev/null
+++ b/org.argeo.cms/src/org/argeo/cms/osgi/CmsOsgiUtils.java
@@ -0,0 +1,40 @@
+package org.argeo.cms.osgi;
+
+import java.util.Collection;
+
+import javax.security.auth.Subject;
+
+import org.argeo.api.cms.CmsSession;
+import org.argeo.api.cms.CmsSessionId;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.InvalidSyntaxException;
+import org.osgi.framework.ServiceReference;
+
+public class CmsOsgiUtils {
+
+       /** @return The {@link CmsSession} for this {@link Subject} or null. */
+       public static CmsSession getCmsSession(BundleContext bc, Subject subject) {
+               if (subject.getPrivateCredentials(CmsSessionId.class).isEmpty())
+                       return null;
+               CmsSessionId cmsSessionId = subject.getPrivateCredentials(CmsSessionId.class).iterator().next();
+               String uuid = cmsSessionId.getUuid().toString();
+               Collection<ServiceReference<CmsSession>> sr;
+               try {
+                       sr = bc.getServiceReferences(CmsSession.class, "(" + CmsSession.SESSION_UUID + "=" + uuid + ")");
+               } catch (InvalidSyntaxException e) {
+                       throw new IllegalArgumentException("Cannot get CMS session for uuid " + uuid, e);
+               }
+               ServiceReference<CmsSession> cmsSessionRef;
+               if (sr.size() == 1) {
+                       cmsSessionRef = sr.iterator().next();
+                       return bc.getService(cmsSessionRef);
+               } else if (sr.size() == 0) {
+                       return null;
+               } else
+                       throw new IllegalStateException(sr.size() + " CMS sessions registered for " + uuid);
+       }
+
+       /** Singleton.*/
+       private CmsOsgiUtils() {
+       }
+}