Index: src/main/java/info/magnolia/module/blossom/annotation/IsAvailable.java
===================================================================
--- src/main/java/info/magnolia/module/blossom/annotation/IsAvailable.java	(revision 0)
+++ src/main/java/info/magnolia/module/blossom/annotation/IsAvailable.java	(revision 0)
@@ -0,0 +1,51 @@
+/**
+ * This file Copyright (c) 2003-2010 Magnolia International
+ * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
+ *
+ *
+ * This file is dual-licensed under both the Magnolia
+ * Network Agreement and the GNU General Public License.
+ * You may elect to use one or the other of these licenses.
+ *
+ * This file is distributed in the hope that it will be
+ * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
+ * implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
+ * Redistribution, except as permitted by whichever of the GPL
+ * or MNA you select, is prohibited.
+ *
+ * 1. For the GPL license (GPL), you can redistribute and/or
+ * modify this file under the terms of the GNU General
+ * Public License, Version 3, as published by the Free Software
+ * Foundation.  You should have received a copy of the GNU
+ * General Public License, Version 3 along with this program;
+ * if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * 2. For the Magnolia Network Agreement (MNA), this file
+ * and the accompanying materials are made available under the
+ * terms of the MNA which accompanies this distribution, and
+ * is available at http://www.magnolia-cms.com/mna.html
+ *
+ * Any modifications to this file must keep this entire header
+ * intact.
+ *
+ */
+package info.magnolia.module.blossom.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Used on a controller method to expose it as that template's isAvailable() method. The method will be used in
+ * place of the default Magnolia template isAvailable() method and must use the following signature:
+ *
+ * public static boolean isAvailable(Content node) { ... }
+ *
+ * The method name can be anything but it must be publically accessible, static and return a boolean value.
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+public @interface IsAvailable {}
\ No newline at end of file
Index: src/main/java/info/magnolia/module/blossom/template/BlossomTemplateDescription.java
===================================================================
--- src/main/java/info/magnolia/module/blossom/template/BlossomTemplateDescription.java	(revision 35702)
+++ src/main/java/info/magnolia/module/blossom/template/BlossomTemplateDescription.java	(working copy)
@@ -35,6 +35,8 @@
 
 import info.magnolia.module.blossom.render.BlossomDispatcherServlet;
 
+import java.lang.reflect.Method;
+
 public class BlossomTemplateDescription {
 
     private String name;
@@ -43,6 +45,7 @@
     private String i18nBasename;
     private String handlerPath;
     private boolean visible;
+    private Method isAvailableMethod;
     private BlossomDispatcherServlet dispatcherServlet;
 
     public String getI18nBasename() {
@@ -100,4 +103,7 @@
     public void setVisible(boolean visible) {
         this.visible = visible;
     }
+
+    public Method getIsAvailableMethod() { return isAvailableMethod; }
+    public void setIsAvailableMethod(Method isAvailableMethod) { this.isAvailableMethod = isAvailableMethod; }
 }
Index: src/main/java/info/magnolia/module/blossom/template/BlossomTemplate.java
===================================================================
--- src/main/java/info/magnolia/module/blossom/template/BlossomTemplate.java	(revision 0)
+++ src/main/java/info/magnolia/module/blossom/template/BlossomTemplate.java	(revision 0)
@@ -0,0 +1,66 @@
+/**
+ * This file Copyright (c) 2003-2010 Magnolia International
+ * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
+ *
+ *
+ * This file is dual-licensed under both the Magnolia
+ * Network Agreement and the GNU General Public License.
+ * You may elect to use one or the other of these licenses.
+ *
+ * This file is distributed in the hope that it will be
+ * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
+ * implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
+ * Redistribution, except as permitted by whichever of the GPL
+ * or MNA you select, is prohibited.
+ *
+ * 1. For the GPL license (GPL), you can redistribute and/or
+ * modify this file under the terms of the GNU General
+ * Public License, Version 3, as published by the Free Software
+ * Foundation.  You should have received a copy of the GNU
+ * General Public License, Version 3 along with this program;
+ * if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * 2. For the Magnolia Network Agreement (MNA), this file
+ * and the accompanying materials are made available under the
+ * terms of the MNA which accompanies this distribution, and
+ * is available at http://www.magnolia-cms.com/mna.html
+ *
+ * Any modifications to this file must keep this entire header
+ * intact.
+ *
+ */
+package info.magnolia.module.blossom.template;
+
+import info.magnolia.cms.core.Content;
+import info.magnolia.module.blossom.BlossomModule;
+import info.magnolia.module.templating.Template;
+
+import java.lang.reflect.Method;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class BlossomTemplate extends Template {
+    private final Logger logger = LoggerFactory.getLogger(getClass());
+
+    @Override
+    public boolean isAvailable(Content content) {
+
+        BlossomTemplateRegistry registry = BlossomModule.getTemplateRegistry();
+        BlossomTemplateDescription description = registry.getTemplate(getContent().getName());
+
+        Method isAvailable = description.getIsAvailableMethod();
+        if (isAvailable == null)
+            return super.isAvailable(content);
+
+        try {
+            return (Boolean) isAvailable.invoke(null, content);
+        }
+        catch (Exception e) {
+            logger.error("Exception occurred executing isAvailable method: " + e, e);
+            return false;
+        }
+    }
+}
\ No newline at end of file
Index: src/main/java/info/magnolia/module/blossom/template/DefaultBlossomTemplateRegistry.java
===================================================================
--- src/main/java/info/magnolia/module/blossom/template/DefaultBlossomTemplateRegistry.java	(revision 35702)
+++ src/main/java/info/magnolia/module/blossom/template/DefaultBlossomTemplateRegistry.java	(working copy)
@@ -80,6 +80,7 @@
         if (StringUtils.isNotBlank(templateDescription.getI18nBasename()))
             content1.createNodeData("i18nBasename", new StringValue(templateDescription.getI18nBasename()));
         content1.createNodeData("type", new StringValue("blossom"));
+        content1.createNodeData("class", "info.magnolia.module.blossom.template.BlossomTemplate");
         content.save();
     }
 
Index: src/main/java/info/magnolia/module/blossom/template/TemplateDescriptionBuilder.java
===================================================================
--- src/main/java/info/magnolia/module/blossom/template/TemplateDescriptionBuilder.java	(revision 35702)
+++ src/main/java/info/magnolia/module/blossom/template/TemplateDescriptionBuilder.java	(working copy)
@@ -34,8 +34,12 @@
 package info.magnolia.module.blossom.template;
 
 import info.magnolia.module.blossom.annotation.I18nBasename;
+import info.magnolia.module.blossom.annotation.IsAvailable;
 import info.magnolia.module.blossom.annotation.Template;
 import info.magnolia.module.blossom.render.BlossomDispatcherServlet;
+
+import java.lang.reflect.Method;
+
 import org.apache.commons.lang.StringUtils;
 
 public class TemplateDescriptionBuilder {
@@ -45,6 +49,14 @@
         Template annotation = handler.getClass().getAnnotation(Template.class);
         I18nBasename i18nBasename = handler.getClass().getAnnotation(I18nBasename.class);
 
+        Method isAvailable = null;
+        for (Method m : handler.getClass().getMethods()) {
+            if (m.isAnnotationPresent(IsAvailable.class)) {
+                isAvailable = m;
+                break;
+            }
+        }
+
         BlossomTemplateDescription description = new BlossomTemplateDescription();
         description.setName(resolveName(handlerPath, handler, annotation));
         description.setTitle(resolveTitle(handlerPath, handler, annotation));
@@ -53,6 +65,7 @@
         description.setHandlerPath(handlerPath);
         description.setVisible(annotation.visible());
         description.setDispatcherServlet(dispatcherServlet);
+        description.setIsAvailableMethod(isAvailable);
 
         return description;
     }