From 7898bb212d23351b7f7a1e80652f37101db917f7 Mon Sep 17 00:00:00 2001
From: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Date: Thu, 27 Sep 2012 14:57:11 -0400
Subject: [PATCH] tmf: Expose getStateSystem() up to ITmfTrace

The default implementation in TmfTrace will not provide any
state system for now, sub-classes need to specify their own.

Change-Id: I9239ac69c5ae20cea1bbe54b34260e829bd84465
Signed-off-by: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Reviewed-on: https://git.eclipse.org/r/7965
---
 .../linuxtools/tmf/core/ctfadaptor/CtfTmfTrace.java |  4 +---
 .../linuxtools/tmf/core/trace/ITmfTrace.java        |  7 +++++++
 .../eclipse/linuxtools/tmf/core/trace/TmfTrace.java | 13 +++++++++++++
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/ctfadaptor/CtfTmfTrace.java b/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/ctfadaptor/CtfTmfTrace.java
index 0cd83b23b6..b8a36b3ab5 100644
--- a/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/ctfadaptor/CtfTmfTrace.java
+++ b/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/ctfadaptor/CtfTmfTrace.java
@@ -281,11 +281,9 @@ public class CtfTmfTrace extends TmfTrace implements ITmfEventParser {
     }
 
     /**
-     * Method getStateSystem.
-     *
-     * @return IStateSystemQuerier
      * @since 2.0
      */
+    @Override
     public ITmfStateSystem getStateSystem() {
         return this.ss;
     }
diff --git a/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/trace/ITmfTrace.java b/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/trace/ITmfTrace.java
index ec087bea23..e6b862de58 100644
--- a/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/trace/ITmfTrace.java
+++ b/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/trace/ITmfTrace.java
@@ -20,6 +20,7 @@ import org.eclipse.linuxtools.tmf.core.event.ITmfEvent;
 import org.eclipse.linuxtools.tmf.core.event.ITmfTimestamp;
 import org.eclipse.linuxtools.tmf.core.event.TmfTimeRange;
 import org.eclipse.linuxtools.tmf.core.exceptions.TmfTraceException;
+import org.eclipse.linuxtools.tmf.core.statesystem.ITmfStateSystem;
 
 /**
  * The event stream structure in TMF. In its basic form, a trace has:
@@ -171,6 +172,12 @@ public interface ITmfTrace extends ITmfDataProvider {
      */
     public int getCacheSize();
 
+    /**
+     * @return The state system that is associated with this trace
+     * @since 2.0
+     */
+    public ITmfStateSystem getStateSystem();
+
     // ------------------------------------------------------------------------
     // Trace characteristics getters
     // ------------------------------------------------------------------------
diff --git a/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/trace/TmfTrace.java b/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/trace/TmfTrace.java
index 66a3e15777..dcbf0dbc7c 100644
--- a/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/trace/TmfTrace.java
+++ b/org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/trace/TmfTrace.java
@@ -25,6 +25,7 @@ import org.eclipse.linuxtools.tmf.core.event.TmfTimestamp;
 import org.eclipse.linuxtools.tmf.core.exceptions.TmfTraceException;
 import org.eclipse.linuxtools.tmf.core.request.ITmfDataRequest;
 import org.eclipse.linuxtools.tmf.core.request.ITmfEventRequest;
+import org.eclipse.linuxtools.tmf.core.statesystem.ITmfStateSystem;
 
 /**
  * Abstract implementation of ITmfTrace.
@@ -313,6 +314,18 @@ public abstract class TmfTrace extends TmfEventProvider implements ITmfTrace {
         return fParser;
     }
 
+    /**
+     * @since 2.0
+     */
+    @Override
+    public ITmfStateSystem getStateSystem() {
+        /*
+         * By default, no state system is used. Sub-classes can specify their
+         * own behaviour.
+         */
+        return null;
+    }
+
     // ------------------------------------------------------------------------
     // ITmfTrace - Trace characteristics getters
     // ------------------------------------------------------------------------
-- 
2.34.1