Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.scl.compiler / src / org / simantics / scl / compiler / types / util / TypeUnparsingContext.java

diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/types/util/TypeUnparsingContext.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/types/util/TypeUnparsingContext.java
new file mode 100644 (file)
index 0000000..a5c4463
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/types/util/TypeUnparsingContext.java
@@ -0,0 +1,39 @@
+package org.simantics.scl.compiler.types.util;
+
+import gnu.trove.map.hash.THashMap;
+
+public class TypeUnparsingContext {
+    
+    THashMap<Object, String> names;
+    int nameId;
+    
+    public TypeUnparsingContext() {
+        this.names = new THashMap<Object, String>();
+        this.nameId = 0;
+    }
+    
+    public TypeUnparsingContext(TypeUnparsingContext parent) {
+        this.names = new THashMap<Object, String>(parent.names);
+        this.nameId = parent.nameId;
+    }
+
+    public String getName(Object var) {
+        String name = names.get(var);
+        if(name == null) {
+            name = idToName(nameId++);
+            names.put(var, name);
+        }
+        return name;
+    }
+
+    private static final int alphabetCount = 'z'-'a'+1;
+    
+    private static String idToName(int id) {
+        String name = Character.toString((char)('a' + id % alphabetCount));
+        id /= alphabetCount;
+        if(id > 0)
+            name = idToName(id-1) + name;
+        return name;
+    }
+
+}