GeomConverter/src/org/lcsim/units

diff -N Constants.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ Constants.java	26 Aug 2009 23:32:42 -0000	1.1
@@ -0,0 +1,51 @@

+package org.lcsim.units;
+
+import java.lang.reflect.Field;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.Map.Entry;
+
+public class Constants 
+{
+	Map<String, Double> constantsMap = new HashMap<String, Double>();
+
+	private static Constants instance = new Constants();
+
+	public double get(String key)
+	{
+		return constantsMap.get(key);
+	}
+
+	public Set<Entry<String,Double>> entrySet()
+	{
+		return constantsMap.entrySet();
+	}
+
+	public static Constants getInstance()
+	{
+		return instance;
+	}
+
+	private Constants()
+	{
+		setupSystemOfUnits();
+	}
+
+	private void setupSystemOfUnits()
+	{
+		SystemOfUnits units = new SystemOfUnits();      
+		Class<SystemOfUnits> klass = SystemOfUnits.class;
+		Field[] fields = klass.getFields();
+		for (Field f : fields)
+		{
+			try {
+				constantsMap.put(f.getName(), f.getDouble(units));
+			}
+			catch ( IllegalAccessException x )
+			{
+				throw new RuntimeException(x);
+			}
+		}
+	}
+}