--- /dev/null
+package org.argeo.jcr;
+
+import org.argeo.ArgeoMonitor;
+
+/**
+ * Simple monitor abstraction. Inspired by Eclipse IProgressMOnitor, but without
+ * dependency to it.
+ */
+@SuppressWarnings("deprecation")
+public interface JcrMonitor extends ArgeoMonitor {
+ /**
+ * Constant indicating an unknown amount of work.
+ */
+ public final static int UNKNOWN = -1;
+
+ /**
+ * Notifies that the main task is beginning. This must only be called once
+ * on a given progress monitor instance.
+ *
+ * @param name
+ * the name (or description) of the main task
+ * @param totalWork
+ * the total number of work units into which the main task is
+ * been subdivided. If the value is <code>UNKNOWN</code> the
+ * implementation is free to indicate progress in a way which
+ * doesn't require the total number of work units in advance.
+ */
+ public void beginTask(String name, int totalWork);
+
+ /**
+ * Notifies that the work is done; that is, either the main task is
+ * completed or the user canceled it. This method may be called more than
+ * once (implementations should be prepared to handle this case).
+ */
+ public void done();
+
+ /**
+ * Returns whether cancelation of current operation has been requested.
+ * Long-running operations should poll to see if cancelation has been
+ * requested.
+ *
+ * @return <code>true</code> if cancellation has been requested, and
+ * <code>false</code> otherwise
+ * @see #setCanceled(boolean)
+ */
+ public boolean isCanceled();
+
+ /**
+ * Sets the cancel state to the given value.
+ *
+ * @param value
+ * <code>true</code> indicates that cancelation has been
+ * requested (but not necessarily acknowledged);
+ * <code>false</code> clears this flag
+ * @see #isCanceled()
+ */
+ public void setCanceled(boolean value);
+
+ /**
+ * Sets the task name to the given value. This method is used to restore the
+ * task label after a nested operation was executed. Normally there is no
+ * need for clients to call this method.
+ *
+ * @param name
+ * the name (or description) of the main task
+ * @see #beginTask(java.lang.String, int)
+ */
+ public void setTaskName(String name);
+
+ /**
+ * Notifies that a subtask of the main task is beginning. Subtasks are
+ * optional; the main task might not have subtasks.
+ *
+ * @param name
+ * the name (or description) of the subtask
+ */
+ public void subTask(String name);
+
+ /**
+ * Notifies that a given number of work unit of the main task has been
+ * completed. Note that this amount represents an installment, as opposed to
+ * a cumulative amount of work done to date.
+ *
+ * @param work
+ * a non-negative number of work units just completed
+ */
+ public void worked(int work);
+
+}