Setting up an environment

rosetta-lang/src/main/java/com/regnosys/rosetta/interpreternew/values/RosettaInterpreterEnvironment.java

@@ -0,0 +1,64 @@
+package com.regnosys.rosetta.interpreternew.values;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class RosettaInterpreterEnvironment {
+	private Map<String, RosettaInterpreterBaseValue> environment;
+
+	public RosettaInterpreterEnvironment() {
+		this.setEnvironment(new HashMap<>());
+	}
+
+	public RosettaInterpreterEnvironment(Map<String, RosettaInterpreterBaseValue> el) {
+		this.setEnvironment(el);
+	}
+
+	public Map<String, RosettaInterpreterBaseValue> getEnvironment() {
+		return environment;
+	}
+
+	public void setEnvironment(Map<String, RosettaInterpreterBaseValue> env) {
+		this.environment = env;
+	}
+
+	/**
+	 * Find a value, by name, in the environment.
+	 *
+	 * @param name - name of the variable you search for
+	 * @return - the value iff variable exists in environment
+	 * 		   error otherwise
+	 */
+	public RosettaInterpreterBaseValue findValue(String name) {
+		if (environment.containsKey(name)) { 
+			return environment.get(name);
+		}
+		else {
+			return new RosettaInterpreterErrorValue(
+					new RosettaInterpreterError(
+							"no such variable in the environment"));
+		}
+
+	}
+
+	/**
+	 * Add a variable and its value to the environment.
+	 *
+	 * @param name - name of the variable
+	 * @param val - value of the variable
+	 */
+	public void addValue(String name, 
+			RosettaInterpreterBaseValue val) {
+
+		if (environment.containsKey(name)) { 
+			//update env
+			environment.replace(name, val);
+		}
+		else {
+			environment.put(name, val);
+		}
+
+	}
+
+
+}