1 files changed, 63 insertions, 0 deletions
diff --git a/plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/internal/util/om/progress/Monitor.java b/plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/internal/util/om/progress/Monitor.java
new file mode 100644
index 0000000000..b0be5af9c5
--- /dev/null
+++ b/plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/internal/util/om/progress/Monitor.java
@@ -0,0 +1,63 @@
+package org.eclipse.net4j.internal.util.om.progress;
+
+import org.eclipse.net4j.util.om.PROGRESS;
+
+/**
+ * @author Eike Stepper
+ */
+public abstract class Monitor
+{
+  private static final int UNINITIALIZED = 0;
+
+  protected int totalWork = UNINITIALIZED;
+
+  protected int work;
+
+  public Monitor()
+  {
+  }
+
+  public int getTotalWork()
+  {
+    return totalWork;
+  }
+
+  public void begin(int totalWork, String task)
+  {
+    if (this.totalWork != UNINITIALIZED)
+    {
+      throw new IllegalStateException("Monitoring has already begun");
+    }
+
+    this.totalWork = totalWork;
+    if (task != null)
+    {
+      setTask(task);
+    }
+  }
+
+  public void worked(int work, String success)
+  {
+    if (this.totalWork == UNINITIALIZED)
+    {
+      throw new IllegalStateException("Monitoring has not yet begun");
+    }
+
+    this.work += work;
+    if (totalWork != PROGRESS.UNKNOWN && this.work > totalWork)
+    {
+      throw new IllegalStateException("Work has exceeded total work");
+    }
+
+    if (success != null)
+    {
+      onSuccess(success);
+    }
+  }
+
+  public abstract void onSuccess(String success);
+
+  public abstract String getTask();
+
+  public abstract void setTask(String task);
+}
+\ No newline at end of file