tmf: Merge the two statesystem-getting methods into one

[deliverable/tracecompass.git] / org.eclipse.linuxtools.tmf.core / src / org / eclipse / linuxtools / tmf / core / trace / TmfTrace.java

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 dac5301261b6419621da3db37c000689f2b65ef0..5fc15d9c77fc84602e4c26717b7cec809e546608 100644 (file)
--- 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
@@ -15,8 +15,8 @@
 package org.eclipse.linuxtools.tmf.core.trace;
 
 import java.io.File;
-import java.util.Collection;
-import java.util.HashMap;
+import java.util.Collections;
+import java.util.LinkedHashMap;
 import java.util.Map;
 
 import org.eclipse.core.resources.IResource;
@@ -114,7 +114,7 @@ public abstract class TmfTrace extends TmfEventProvider implements ITmfTrace {
      * @since 2.0
      */
     protected final Map<String, ITmfStateSystem> fStateSystems =
-            new HashMap<String, ITmfStateSystem>();
+            new LinkedHashMap<String, ITmfStateSystem>();
 
     // ------------------------------------------------------------------------
     // Construction
@@ -405,16 +405,8 @@ public abstract class TmfTrace extends TmfEventProvider implements ITmfTrace {
      * @since 2.0
      */
     @Override
-    public final ITmfStateSystem getStateSystem(String id) {
-        return fStateSystems.get(id);
-    }
-
-    /**
-     * @since 2.0
-     */
-    @Override
-    public final Collection<String> listStateSystems() {
-        return fStateSystems.keySet();
+    public final Map<String, ITmfStateSystem> getStateSystems() {
+        return Collections.unmodifiableMap(fStateSystems);
     }
 
     /**