From 602c06978f31419b646228e973021e02672fcd11 Mon Sep 17 00:00:00 2001
From: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Date: Thu, 28 Feb 2013 15:59:09 -0500
Subject: [PATCH] tmf: Add a method to query an ongoing state's start time

We can already query a state system's current state value for
a given attribute. It's trivial to expose a method to also query
the start time of that state.

Change-Id: I4b2610709bb0af33b612514007787b20f941f490
Signed-off-by: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Reviewed-on: https://git.eclipse.org/r/10757
Tested-by: Hudson CI
Reviewed-by: Bernd Hufmann <bhufmann@gmail.com>
IP-Clean: Bernd Hufmann <bhufmann@gmail.com>
---
 .../tmf/core/statesystem/StateSystem.java      |  8 ++++++--
 .../tmf/core/statesystem/TransientState.java   | 18 ++++++++----------
 .../tmf/core/statesystem/ITmfStateSystem.java  | 13 +++++++++++++
 3 files changed, 27 insertions(+), 12 deletions(-)

diff --git a/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/internal/tmf/core/statesystem/StateSystem.java b/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/internal/tmf/core/statesystem/StateSystem.java
index a9d69fea48..cd82f92119 100644
--- a/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/internal/tmf/core/statesystem/StateSystem.java
+++ b/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/internal/tmf/core/statesystem/StateSystem.java
@@ -463,14 +463,18 @@ public class StateSystem implements ITmfStateSystemBuilder {
         return transState.getOngoingStateValue(attributeQuark);
     }
 
+    @Override
+    public long getOngoingStartTime(int attribute)
+            throws AttributeNotFoundException {
+        return transState.getOngoingStartTime(attribute);
+    }
+
     @Override
     public void updateOngoingState(ITmfStateValue newValue, int attributeQuark)
             throws AttributeNotFoundException {
         transState.changeOngoingStateValue(attributeQuark, newValue);
     }
 
-
-
     //--------------------------------------------------------------------------
     //        Regular query methods (sent to the back-end)
     //--------------------------------------------------------------------------
diff --git a/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/internal/tmf/core/statesystem/TransientState.java b/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/internal/tmf/core/statesystem/TransientState.java
index 19ec969c64..1fae851b79 100644
--- a/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/internal/tmf/core/statesystem/TransientState.java
+++ b/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/internal/tmf/core/statesystem/TransientState.java
@@ -68,16 +68,18 @@ class TransientState {
         return latestTime;
     }
 
-    ITmfStateValue getOngoingStateValue(int index)
-            throws AttributeNotFoundException {
-
+    ITmfStateValue getOngoingStateValue(int index) throws AttributeNotFoundException {
         checkValidAttribute(index);
         return ongoingStateInfo.get(index);
     }
 
+    long getOngoingStartTime(int index) throws AttributeNotFoundException {
+        checkValidAttribute(index);
+        return ongoingStateStartTimes.get(index);
+    }
+
     void changeOngoingStateValue(int index, ITmfStateValue newValue)
             throws AttributeNotFoundException {
-
         checkValidAttribute(index);
         ongoingStateInfo.set(index, newValue);
     }
@@ -89,17 +91,13 @@ class TransientState {
      * @param quark
      * @throws AttributeNotFoundException
      */
-    ITmfStateInterval getOngoingInterval(int quark)
-            throws AttributeNotFoundException {
-
+    ITmfStateInterval getOngoingInterval(int quark) throws AttributeNotFoundException {
         checkValidAttribute(quark);
         return new TmfStateInterval(ongoingStateStartTimes.get(quark), -1, quark,
                 ongoingStateInfo.get(quark));
     }
 
-    private void checkValidAttribute(int quark)
-            throws AttributeNotFoundException {
-
+    private void checkValidAttribute(int quark) throws AttributeNotFoundException {
         if (quark > ongoingStateInfo.size() - 1 || quark < 0) {
             throw new AttributeNotFoundException();
         }
diff --git a/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/statesystem/ITmfStateSystem.java b/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/statesystem/ITmfStateSystem.java
index 6891dcdb37..d432643e3c 100644
--- a/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/statesystem/ITmfStateSystem.java
+++ b/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/statesystem/ITmfStateSystem.java
@@ -220,6 +220,19 @@ public interface ITmfStateSystem {
     public ITmfStateValue queryOngoingState(int attributeQuark)
             throws AttributeNotFoundException;
 
+    /**
+     * Get the start time of the current ongoing state, for the specified
+     * attribute.
+     *
+     * @param attribute
+     *            Quark of the attribute
+     * @return The current start time of the ongoing state
+     * @throws AttributeNotFoundException
+     *             If the attribute is invalid
+     */
+    public long getOngoingStartTime(int attribute)
+            throws AttributeNotFoundException;
+
     /**
      * Load the complete state information at time 't' into the returned List.
      * You can then get the intervals for single attributes by using
-- 
2.34.1