Remove UI dependencies to JCR.

[lgpl/argeo-commons.git] / jcr / org.argeo.cms.jcr.ui / src / org / argeo / cms / ui / CmsUiProvider.java

diff --git a/jcr/org.argeo.cms.jcr.ui/src/org/argeo/cms/ui/CmsUiProvider.java b/jcr/org.argeo.cms.jcr.ui/src/org/argeo/cms/ui/CmsUiProvider.java
new file mode 100644 (file)
index 0000000..5f2377b
--- /dev/null
+++ b/jcr/org.argeo.cms.jcr.ui/src/org/argeo/cms/ui/CmsUiProvider.java
@@ -0,0 +1,51 @@
+package org.argeo.cms.ui;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+
+import org.argeo.api.acr.Content;
+import org.argeo.cms.jcr.acr.JcrContent;
+import org.argeo.cms.swt.acr.SwtUiProvider;
+import org.argeo.jcr.JcrException;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Control;
+
+/** Stateless factory building an SWT user interface given a JCR context. */
+public interface CmsUiProvider extends SwtUiProvider {
+       /**
+        * Initialises a user interface.
+        * 
+        * @param parent  the parent composite
+        * @param context a context node (holding the JCR underlying session), or null
+        */
+       default Control createUi(Composite parent, Node context) throws RepositoryException {
+               // does nothing by default
+               return null;
+       }
+
+       default Control createUiPart(Composite parent, Node context) {
+               try {
+                       return createUi(parent, context);
+               } catch (RepositoryException e) {
+                       throw new JcrException("Cannot create UI for context " + context, e);
+               }
+       }
+
+       @Override
+       default Control createUiPart(Composite parent, Content context) {
+               if (context == null)
+                       return createUiPart(parent, (Node) null);
+               if (context instanceof JcrContent) {
+                       Node node = ((JcrContent) context).getJcrNode();
+                       return createUiPart(parent, node);
+               } else {
+//                     CmsLog.getLog(CmsUiProvider.class)
+//                                     .warn("In " + getClass() + ", content " + context + " is not compatible with JCR.");
+//                     return createUiPart(parent, (Node) null);
+
+                       throw new IllegalArgumentException(
+                                       "In " + getClass() + ", content " + context + " is not compatible with JCR");
+               }
+       }
+
+}