X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.scl.runtime%2Fsrc%2Forg%2Fsimantics%2Fscl%2Fruntime%2FSCLContext.java;fp=bundles%2Forg.simantics.scl.runtime%2Fsrc%2Forg%2Fsimantics%2Fscl%2Fruntime%2FSCLContext.java;h=63fa2f1e28dc6b1240feb08ac2dd57ca233507cf;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.scl.runtime/src/org/simantics/scl/runtime/SCLContext.java b/bundles/org.simantics.scl.runtime/src/org/simantics/scl/runtime/SCLContext.java
new file mode 100644
index 000000000..63fa2f1e2
--- /dev/null
+++ b/bundles/org.simantics.scl.runtime/src/org/simantics/scl/runtime/SCLContext.java
@@ -0,0 +1,60 @@
+package org.simantics.scl.runtime;
+
+import gnu.trove.map.hash.THashMap;
+
+import java.util.Map;
+
+public class SCLContext extends THashMap<String,Object> {
+    private static ThreadLocal<SCLContext> CONTEXT = new ThreadLocal<SCLContext>();
+    private static ThreadLocal<OldContextNode> OLD_CONTEXT = new ThreadLocal<OldContextNode>();
+    
+    private static class OldContextNode {
+        final SCLContext context;
+        final OldContextNode next;
+        
+        public OldContextNode(SCLContext context, OldContextNode next) {
+            this.context = context;
+            this.next = next;
+        }
+    }
+    
+    public static SCLContext getCurrent() {
+        SCLContext context = CONTEXT.get();
+        if(context == null) {
+            context = new SCLContext();
+            CONTEXT.set(context);
+        }
+        return context;
+    }
+    
+    public static void push(SCLContext newContext) {
+        SCLContext oldContext = CONTEXT.get();
+        if(oldContext != null)
+            OLD_CONTEXT.set(new OldContextNode(oldContext, OLD_CONTEXT.get()));
+        CONTEXT.set(newContext);
+    }
+    
+    public static void pop() {
+        OldContextNode node = OLD_CONTEXT.get();
+        if(node == null)
+            CONTEXT.set(null);
+        else {
+            CONTEXT.set(node.context);
+            OLD_CONTEXT.set(node.next);
+        }
+    }
+    
+    /*
+    @Override
+    public Object get(Object key) {
+        Object result = super.get(key);
+        System.out.println(this + ": " + key + " -> " + result);
+        return result;
+    }
+    
+    @Override
+    public Object put(String key, Object value) {
+        System.out.println(this + ": " + key + " <- " + value);
+        return super.put(key, value);
+    }*/
+}