1 files changed, 51 insertions, 0 deletions
diff --git a/boil/TypeFactory.java b/boil/TypeFactory.java
new file mode 100644
index 0000000..d5b61f3
--- /dev/null
+++ b/boil/TypeFactory.java
@@ -0,0 +1,51 @@
+package boil;
+
+import misc.*;
+import java.util.HashMap;
+
+public class TypeFactory {
+
+    private int type_num;
+    private HashMap<String,String> map;
+
+    public void reset() {
+        this.type_num = 0;
+        this.map = new HashMap<>();
+    }
+
+    public String alias(String t) {
+        /**
+         * Given a TypeInstance, return the designated
+         * vapor alias. If the alias does not exist, create it.
+         */
+        String alias;
+        if ((alias = this.map.get(t)) == null) {
+            alias = String.format("t.%d", this.type_num++);
+            MinimalLogger.info(String.format("Created alias %s for %s...",
+                                             alias,
+                                             t));
+
+            this.map.put(t, alias);
+        }
+
+        return alias;
+    }
+
+    public String retrieveRecentList(int x) {
+        /**
+         * Given int x, retrieve a space-delimited
+         * list of the x most recent entries.
+         */
+        String rtn = "";
+        if (x > 0) {
+            rtn += String.format("t.%d",
+                                 type_num-x);
+            for (int i = type_num-(x-1); i < type_num; ++i) {
+                rtn += String.format(" t.%d",
+                                     i);
+            }
+        }
+
+        return rtn;
+    }
+}