From 45a2b88d584fc8bdee1fbaf0def1d9b55ba26eff Mon Sep 17 00:00:00 2001
From: Jan Tuomi <jans.tuomi@gmail.com>
Date: Tue, 21 Jun 2016 20:07:32 +0300
Subject: Added scopes, variables and functions

---
 main/core/runtime/Scope.java | 48 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 main/core/runtime/Scope.java

(limited to 'main/core/runtime/Scope.java')

diff --git a/main/core/runtime/Scope.java b/main/core/runtime/Scope.java
new file mode 100644
index 0000000..a45cdd7
--- /dev/null
+++ b/main/core/runtime/Scope.java
@@ -0,0 +1,48 @@
+package com.jantuomi.interpreter.main.core.runtime;
+
+import com.jantuomi.interpreter.main.core.parser.datatype.DataContainer;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Created by jan on 20.6.2016.
+ */
+public class Scope {
+    private Scope parent = null;
+
+    private Map<String, DataContainer> variables = new HashMap<>();
+    private Map<String, Function> functions = new HashMap<>();
+
+    public void addVariable(String symbol) {
+        variables.put(symbol, null);
+    }
+
+    public void setVariableValue(String symbol, DataContainer value) {
+        variables.replace(symbol, value);
+    }
+
+    public DataContainer resolveSymbol(String symbol, List<DataContainer> params) {
+        if (functions.containsKey(symbol)) {
+            return functions.get(symbol).evaluate(params);
+        }
+        if (variables.containsKey(symbol)) {
+            return variables.get(symbol);
+        }
+        else if (parent != null) {
+            return parent.resolveSymbol(symbol, params);
+        }
+        else {
+            return null;
+        }
+    }
+
+    public void setParent(Scope parent) {
+        this.parent = parent;
+    }
+
+    public void addFunction(String symbol, Function func) {
+        functions.put(symbol, func);
+    }
+}
-- 
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