1 files changed, 52 insertions, 0 deletions
diff --git a/st/SymbolTable.java b/st/SymbolTable.java
new file mode 100644
index 0000000..0757541
--- /dev/null
+++ b/st/SymbolTable.java
@@ -0,0 +1,52 @@
+package st;
+
+import java.util.*;
+
+public class SymbolTable {
+
+    private HashMap<String,AbstractInstance> symt;
+
+    public SymbolTable() {
+        this.symt = new HashMap<>();
+    }
+
+    public String toString() {
+        StringBuilder mapAsString = new StringBuilder("{");
+        for (String key : this.symt.keySet()) {
+            mapAsString.append(key + ":" + this.symt.get(key) + ", ");
+        }
+        mapAsString.delete(mapAsString.length()-2, mapAsString.length()).append("}");
+        return mapAsString.toString();
+    }
+
+    public void addMethod() {
+        this.
+	    }
+
+    public void put(String id, AbstractInstance symbol) {
+        this.symt.put(id, symbol);
+    }
+
+    public TypeInstance getType(String index) {
+        AbstractInstance symbol;
+        return ((symbol = this.symt.get(index)) !=
+                null && symbol.getType() != TypeEnum.classname &&
+                symbol.getType() != TypeEnum.method) ?
+            (TypeInstance) symbol : null;
+    }
+
+    public MethodInstance getMethod(String index) {
+        AbstractInstance symbol;
+        return ((symbol = this.symt.get(index)) !=
+                null && symbol.getType() == TypeEnum.method) ?
+            (MethodInstance) symbol : null;
+    }
+
+    public ClassInstance getClass(String index) {
+        AbstractInstance symbol;
+        return ((symbol = this.symt.get(index)) !=
+                null && symbol.getType() == TypeEnum.classname) ?
+            (ClassInstance) symbol : null;
+    }
+
+}