--- /dev/null
+package org.splat.som;
+/**
+ * Class defining the default rights related to operations on study steps.
+ *
+ * @author Daniel Brunier-Coulin
+ * @copyright OPEN CASCADE 2012
+ */
+//TODO: Review this rights according to the state of the owner study.
+
+import org.splat.kernel.User;
+
+
+public class StepRights {
+
+ private User user;
+ private Step operand;
+
+// ==============================================================================================================================
+// Construction
+// ==============================================================================================================================
+
+ public StepRights (User user, Step step) {
+// ----------------------------------------
+ this.user = user;
+ this.operand = step;
+ }
+ public StepRights (Step step) {
+// -----------------------------
+ this.user = step.getOwner().getAuthor();
+ this.operand = step;
+ }
+
+// ==============================================================================================================================
+// Public member functions
+// ==============================================================================================================================
+
+/**
+ * Checks if the user has right to add a comment attached to the selected step.
+ * All actors of the study have such right, including the author, contributors, reviewers and approvers.
+ *
+ * @return true if the user has right to add a comment.
+ */
+ public boolean canAddComment () {
+// -------------------------------
+ Study owner = operand.getOwnerStudy();
+ return (owner.getAuthor().equals(user) || owner.hasActor(user));
+ }
+
+/**
+ * Checks if the user has right to create or import a document into the selected step.
+ * Only the author and contributors have such right, providing that the study step is enabled for writing.
+ *
+ * @return true if the user has right to create or import a document.
+ */
+ public boolean canCreateDocument () {
+// -----------------------------------
+ if (!isEnabled()) return false;
+ return operand.getOwnerStudy().isStaffedBy(user);
+ }
+
+/**
+ * Checks if the user has right to enter a knowledge into the selected step.
+ * Only the author and contributors have such right.
+ *
+ * @return true if the user has right to enter a knowledge.
+ */
+ public boolean canCreateKnowledge () {
+// ------------------------------------
+ return operand.getOwnerStudy().isStaffedBy(user);
+ }
+
+/**
+ * Checks if the user has right to edit the simulation contexts attached to the selected step.
+ * All actors of the study have such right, including the author, contributors, reviewers and approvers.
+ *
+ * @return true if the user has right to edit the simulation contexts.
+ */
+ public boolean canEditSimulationContext () {
+// ------------------------------------------
+ Study owner = operand.getOwnerStudy();
+ return (owner.getAuthor().equals(user) || owner.hasActor(user));
+ }
+
+/**
+ * Checks if the selected step is enabled for writing.
+ * A step may be disabled for writing, or locked, following a check-out of the owner scenario.
+ *
+ * @return true if the step is enabled for writing.
+ */
+ public boolean isEnabled () {
+// ---------------------------
+ ProjectElement owner = operand.getOwner();
+
+ if (owner instanceof Scenario) {
+ Scenario scene = (Scenario)owner;
+ if (scene.isCheckedout()) return false;
+ }
+ return true;
+ }
+
+// ==============================================================================================================================
+// Getters
+// ==============================================================================================================================
+
+ public Step getOperand () {
+// -------------------------
+ return operand;
+ }
+}
\ No newline at end of file
